Browsing by Author "Supan Yodyingyong"
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Item Metadata only An interdisciplinary learning unit for first year undergraduate students : dye-sensitized solar cell from sunlight to electricity(Mahidol University. Mahidol University Library and Knowledge Center, 2023) Supan Yodyingyong; Darapond Triampo; Wannapong Triampo; Bhinyo Panijpanการศึกษาวิจัยนี้แบ่งการศึกษาออกเป็นสองส่วน คือส่วนที่เป็นการวิจัยทางด้านวิทยาศาสตร์ และด้านวิทยาศาสตร์ศึกษา โดยงานด้านวิทยาศาสตร์เป็นการศึกษาเพื่อพัฒนาประสิทธิภาพของเซลล์ แสงอาทิตย์ชนิดสีย้อมไวแสง และเซลล์แสงอาทิตย์ชนิดไฮบริด โดยการประยุกต์ใช้เส้นใยนาโน ZnO และ ท่อนาโน TiO2 เป็นขั้วไฟฟ้า ผลจากการศึกษาพบว่าประสิทธิภาพของเซลล์แสงอาทิตย์ทั้งสองชนิดเพิ่มขึ้น ซึ่งเป็นผลมาจากการมีพื้นที่ผิวที่มากพอ และมีการนำอิเล็กตรอนได้รวดเร็วของขั้วไฟฟ้าที่ทำจากเส้นใย นาโน ZnO และ ท่อนาโน TiO2 ความรู้ที่ได้จากการศึกษาวิจัยในทางวิทยาศาสตร์บางส่วนถูกนำมาจัดทำเป็นหน่วยการเรียน การสอนแบบบูรณาการ เพื่อช่วยให้นักศึกษาระดับปริญญาตรีชั้นปีที่ 1 มีความรู้ความเข้าใจเกี่ยวกับ หลักการในการเปลี่ยนพลังงานแสงอาทิตย์ให้เป็นพลังงานไฟฟ้า โดยหน่วยการเรียนการสอนแบบบูรณา การเรื่องเซลล์แสงอาทิตย์ชนิดสีย้อมไวแสง จะใช้วิธีการสอนแบบสืบเสาะหาความรู้ เนื้อหาที่เกี่ยวข้องใน หน่วยการเรียนนี้ประกอบด้วยเรื่องกระแสไฟฟ้า แสง สารกึ่งตัวนำ แถบพลังงาน และหลักการทำงานของ เซลล์แสงอาทิตย์ นักเรียนที่เข้าร่วมกิจกรรมจะทำงานเป็นกลุ่ม และเรียนรู้ด้วยกระบวนการสืบเสาะ หาความรู้ผ่านกิจกรรมการเรียนรู้ต่างๆโดยมีคำถามเป็นสิ่งชี้นำในการเรียน ผลจากการศึกษาผลพบว่า นักเรียนมีความรู้เกี่ยวกับเรื่องเซลล์แสงอาทิตย์มากขึ้นและมีทัศนคติที่ดีต่อวิธีการสอนและหน่วยการเรียน ที่สร้างขึ้น หน่วยการเรียนที่สร้างขึ้นสามารถที่จะใช้เป็นตัวอย่างในการสร้างหน่วยการเรียนการสอนแบบ บูรณาการสำหรับการเรียนการสอนวิทยาศาสตร์ในอนาคต เพื่อเป็นการช่วยกระตุ้นให้นักเรียนมีความ สนใจและอยากเรียนรู้วิทยาศาสตร์มากขึ้นได้Publication Metadata only Copper-Zinc Oxide Synergistic Approach as Low-Emissivity Material for Energy-Saving Windows(2020-05-13) Sireethorn Termkleebbuppa; Supan Yodyingyong; Jeerapond Leelawattanachai; Wannapong Triampo; Noppakun Sanpo; Jaturong Jitputti; Darapond Triampo; SCG Chemicals Co., Ltd.; Mahidol University; Thailand National Science and Technology Development Agency© Published under licence by IOP Publishing Ltd. In luxurious glass buildings and constructions, heat gain (or heat loss) mostly comes through the windows. Infrared (IR) radiation is an important factor that causes the entry of heat into the buildings. To save energy consumption of air conditioners, low-emissivity (Low-E) glass coating applications are focused. In the energy-saving field, transparent conductive oxide (TCOs) are used as coatings to minimized IR entry. In this work, copper-doped zinc oxide (CZO) is synthesized for thermal reflective material. Cu(II) ions are doped to ZnO by a sol-gel method to obtain CZO nanoparticles and is coated on a glass substrate. The morphology of CZO is investigated with scanning electron microscopy (SEM); phase crystallinity is determined by X-ray diffraction (XRD); and UV-Vis-NIR spectroscopy is used to characterize UV/IR-shielding and also the optical transparency. IR cameras and in-lab thermal insulation setup are used to test the heat insulation properties. The result shows that 15% copper-doped zinc oxide has the best insulation from IR rays with the lowest temperature in the interior (T3) of 50.6°C while the outer temperature (T2) was at 85.5°C the lowering of the temperature by 34.9°C (cooler by 59%). CZO synthesized from the sol-gel method has promising properties for Low-E glass coating applications.Item Metadata only Development of a science learning unit to enhance high school students' understanding of rainbow based on predict-observe-explain approach.(Mahidol University. Mahidol University Library and Knowledge Center, 2014) Choegyal, Sonam, 1980-; Monamorn Precharattana; Supan Yodyingyong; Ekgapoom JantarakanteeStudents find the subject of Physics tough and uninteresting due to abstract and complex content. Consequently, students' interest in and attitude towards physics is deteriorating all over the world, which is also blamed on the unacceptable quality of teaching. In order to address the aforementioned problems, this study says that the introduction of interesting topics in physics raises the interest and curiosity of the students thereby motivating students to continue studying physics. In addition, hands-on activities, along with a suitable learning cycle, help students to learn the concepts better. Therefore, in this study, the Predict-Observe-Explain (POE) learning cycle was used along with models for hands-on learning on interesting optical phenomena related to rainbow formation. This study was aimed at investigating students' conceptual understanding about the optical phenomenon of rainbow formation and investigating students' opinions on the developed learning unit. A conceptual understanding test along with a learning unit opinion survey questionnaire (LUOSQ) was used to investigate students' understanding of the concepts. The opinion of the students towards the learning unit was investigated using the LUOSQ items and students' interview responses. The participants of this study were 120 grade 11 science students from one district in Bhutan. The study found that the average score increased from 23.3% in the pre-test to 82.7% in the post-test with an overall gain of 59%. Moreover, the average mean of LUOSQ items was 4.71. These results indicate that there was significant improvement of the students' conceptual understanding of rainbow formation and the opinion of the students showed strong approval of the learning unit.Item Metadata only Development of sol-gel laboratory using inquiry for high school students(Mahidol University. Mahidol University Library and Knowledge Center, 2014) Lhaden, Namgay, 1979-; Supan Yodyingyong; Pirom Chenprakhon; Watcharee KetpichainarongStudents often find chemistry is a difficult subject andis not interesting due toits abstract nature and complex contents. The chemistry lessons in Bhutan are still taught through the traditional method, which is more focusedon rote learning. Students face difficulties in relating what they learn in the classroom to real worldsituation and daily activities.Rote learning demotivates students learning chemistry and thus students do not have a good attitude towards the subject.Therefore, this research study is aimed at developing aSol-Gel laboratory based on the inquiry learning approach for Bhutanese grade 10 students to help them gain more understanding, meaningful learning and a positive attitude when learning chemistry. The Sol-Gel laboratory, based on how to prepare silica gel,was developed using an inquiry learning approach. In this study, 64 students at grade 10 participated in inquiry learning using the Sol-Gel laboratory. The participants were selected by purposive sampling. This study investigated students' conceptual understanding, students' perception and preferences in the learning environment, towards the learning activity using conceptual tests, the CLES questionnaire and an interview. The conceptual tests, CLES questionnaire and interview were conducted prior and after the implementation of the Sol-Gel laboratory. The results showed that students had a positive attitude to learning as evident from the interviews and CLES questionnaire. The activities helped them gain more conceptual understanding and skills such as asking critical questions, predicting, solving problem, drawing inferences, communication, and etc. The inquiry activities provided the opportunity for students to interact verbally with other students to build scientific knowledge within the classroom. This Sol-Gel laboratory helped students to improve their understanding and attitudes towards important aspects of the laboratory including their eagerness to do the activities, their sense of value of the activity and the impact of the activities on their interest, enjoyment and understanding.Publication Metadata only Effect of morphology on near-infrared shielding properties of aluminum-doped zno by solvothermal synthesis(2020-01-01) Pimpaka Putthithanas; Supan Yodyingyong; Jeerapond Leelawattanachai; Wannapong Triampo; Noppakun Sanpo; Jaturong Jitputti; Darapond Triampo; SCG Chemicals Co., Ltd.; Mahidol University; Thailand National Science and Technology Development Agency© 2020 Trans Tech Publications Ltd, Switzerland. In this work, aluminum-doped ZnO (AZO) is synthesized for heat-shielding applications. A family of ethanolamine (EA: monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine TEA)) is used to control the morphology of aluminum-doped ZnO (AZO) synthesized via a simple solvothermal method at the temperature of 120℃ for 6 h. The samples were characterized by field-emission scanning electron microscopy (FE-SEM). The formation of primary ZnO nanoparticles (NPs) showed that TEA yielded highly packed-spherical aggregates not found when DEA and MEA were used. X-ray diffraction (XRD) found that all AZO samples have peaks of the ZnO hexagonal wurtzite structure. XRD patterns of aluminum were found for >10 mol%. UV-Vis-NIR spectrophotometer was used to study the optical property and heat-shielding of the near-infrared region (NIR, the wavelength from 700-2500 nm). All AZO NPs of 0, 2, 4, and 10 mol% exhibited strong NIR shielding ability up to 80% insulation. From these results, the AZO NPs have potential use as NIR shielding materials of low-cost and simple processes to be coated on an energy-efficient window as smart window coating in buildings and automotive thus reducing energy consumption, especially in air conditioning usage.Publication Metadata only Enhanced photovoltaic performance of nanostructured hybrid solar cell using highly oriented TiO2nanotubes(2010-12-16) Supan Yodyingyong; Xiaoyuan Zhou; Qifeng Zhang; Darapond Triampo; Junting Xi; Kwangsuk Park; Benjie Limketkai; Guozhong Cao; University of Washington, Seattle; Mahidol University; Intel Research LaboratoriesHighly oriented TiO2nanotubes have been fabricated using ZnO nanorod template through liquid reactive deposition on the ITO substrates. The diameter and length of TiO2nanotubes can be effectively controlled for the suitable use for a hybrid solar cell by varying the diameter and length of the ZnO nanorod template. A mixture of P3HT/PCBM was infiltrated into the gaps between TiO2nanotubes to form hybrid solar cells. The open circuit voltage, short circuit current density, fill factor, and power conversion efficiency of the hybrid solar cell using highly oriented TiO2nanotubes were 646 mV, 9.95 mA cm-2, 51.6%, and 3.32%, respectively, much higher than 1.2% of hybrid solar cell based on ZnO nanorods tested under otherwise identical conditions and significantly higher than 0.7% of the same type hybrid solar cells reported in literature. The enhancement of the power conversion efficiency could be resulted from the highly oriented TiO2nanotubes with smaller diameter and large specific surface area for the efficient electron transfer in hybrid solar cells. © 2010 American Chemical Society.Publication Metadata only The experiential learning unit for promoting students’ understanding of vapor pressure and related concepts(2020-01-01) Siwa Mahardthai; Supan Yodyingyong; Namkang Sriwattanarothai; Piyachat Jittam; Mahidol University© 2020, Springer Nature Singapore Pte Ltd. Vapor pressure is a difficult concept for high school students because it requires understanding at the microscopic level. To better understand the concept, students should clearly understand some prerequisite concepts, such as evaporation, condensation, and pressure. Therefore, this research aims to develop Kolb’s experiential learning activities for providing experience before extending to learn the vapor pressure concept through online resources. The learning unit consists of two main activities that are 1) observing scientific phenomena aims at helping students to gain experience of the concepts, and 2) color manipulatives designing to help students to understand the concepts at the microscopic level. The learning unit had been implemented with grade ten students. The conceptual test and interview had been used to assess student understanding. Results show that some students still have learning difficulties related to vapor pressure and related concepts. They had difficulty in explaining the concepts at the molecular explanation and confused some technical terms. The online resources have been discussed for suggesting a suitable pathway to each group of students.Publication Metadata only Exposure to Nanoscience and Nanotechnology Using Guided-Inquiry-Based Activities with Silica Aerogel To Promote High School Students' Motivation(2019-06-11) Wichai Lati; Darapond Triampo; Supan Yodyingyong; Mahidol University© 2019 American Chemical Society and Division of Chemical Education, Inc. Nanoscience and nanotechnology are the study and application of materials on a nanometer scale. These fields of study aid the developments of innovative technologies that play an important role in our everyday lives. Enabling students to learn these topics makes learning more meaningful and helps prepare them for future technologies. This study aimed to investigate the effects of learning activities about nanoscience and nanotechnology on students' motivation. The designed activities were based on guided-inquiry learning using silica aerogel as the nanomaterial. This material has many interesting properties such as high thermal insulation, low acoustic velocity, very low density, very high specific surface area, etc., which are influenced by structures on the nanometer scale. A variety of teaching methods, including learning with models, multimedia, hands-on activities, and guided-inquiry learning, were implemented to promote the students' motivation. There were 28 grade 12 science students sampled for this purpose. Three actual methods were adopted to determine the effectiveness of the learning activities, including questionnaires implemented before and after the activities, students' self-assessments, and semistructured interviews at the end of the activities. The results from the questionnaires showed that the students were highly motivated by the nanoscience and nanotechnology learning activities. The students' self-assessment and interviews revealed that the learning activities encouraged the students to learn by allowing them to experience various teaching materials. The students became more interested in finding more information about silica aerogel and other nanomaterials used in daily life.Publication Metadata only Fabrication study of hydrophobic polyurethane sponge for oil absorption application(2017-01-01) Peeranut Prakulpawong; Jinjutha Wiriyanantawong; Janista Pornpoonsawat; Supan Yodyingyong; Darapond Triampo; Mahidol University© 2017 Trans Tech Publications, Switzerland. In this research, the researchers study the fabrication of oil absorption, hydrophobic polyurethane (PU) sponge for application in an oil-spill cleanup model. Virgin PU is initially hydrophilic. PU is made hydrophobic by incorporating hydrophobic silica aerogel (SA) into PU 3D porous structure by stirring method and UV-treatment method. UV-irradiation promotes the attachment of SA onto the PU surface. Varying UV irradiation time and concentration of SA is done to attain an optimal attachment of SA on PU. Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and contact angle measurements (CA) are used to determine the adhesion of SA on PU. The loadings of SA with and without UV-treatment are compared. Results show that SA-PU with UV-treatment has more loading of SA than SA-PU without treatment. FT-IR spectra and SEM micrographs verify the results. Moreover, the SA-PU is tested for oil absorption to simulate oil-spill cleanup. The findings show fast (less than 3 seconds), recoverable oil-spills cleanup with simple method of preparation. In addition, SA-PU with UV treatment has higher absorption rate and absorption efficiency when compared to original PU and SA-PU without UV treatment.Publication Metadata only High school exploration of a phase change material as a thermal energy storage(2021-04-20) Kwanhathai Ardnaree; Darapond Triampo; Supan Yodyingyong; Mahidol UniversityThe present study describes a hands-on experiment to help students understand the concept of phase change or phase transition and its application in a phase change material (PCM). PCMs are substances that have the capability of storing and releasing large amounts of thermal energy. They act as energy storage materials that provide an effective way to save energy by reducing the electricity required for heating and cooling. Lauric acid (LA) was selected as an example of the PCM. Students investigated the temperature change of LA and the temperature (of air) inside the test tube. The differences in the temperatures of the systems helped students understand how PCMs work. A one-group pretest and posttest design was implemented with 34 grade-11 students in science and mathematics. Students' understanding was assessed using a multiple-choice test and a questionnaire. The findings revealed that the designed activity helped students understand the concept of phase change and its application to materials for thermal energy storage.Publication Metadata only An inexpensive furnace for calcination: Simple TiO2 synthesis(2009-08-01) Supan Yodyingyong; Bhinyono Panijpan; Wannapong Triampo; Darapond Triampo; Mahidol UniversityPublication Metadata only Physicochemical properties of nanoparticles titania from alcohol burner calcination(2011-07-15) Supan Yodyingyong; Chaiyuth Sae-Kung; Bhinyo Panijpan; Wannapong Triampo; Darapond Triampo; Rajabhat Maha Sarakham University; Nationnal Science and Technology Development Agency (NSTDA); Mahidol UniversityThe physicochemical properties of synthesized TiO 2 nanoparticles from integrating sol-gel with flame-based techniques were studied. The synthesized nanoparticles properties were compared after using methanol, ethanol, and propanol fuel sources. The synthesized TiO 2 were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal analysis (thermogravimetric analysis, TGA, and differential scanning calorimetry, DSC), and surface area Brunauer-Emmett-Teller (BET) method. The photocatalytic activity of TiO 2 nanoparticles was investigated by measuring the degradation of methylene blue. It was found that methanol and ethanol burners can be used as an alternative furnace that can yield TiO 2 nanoparticles with physicochemical properties comparable to that of commercial TiO 2 nanoparticles, while a propanol burner cannot be used as an alternative fuel. © 2011 Chemical Society of Ethiopia.Publication Open Access Physicochemical properties of nanoparticles titania from alcohol burner calcination(2011) Supan Yodyingyong; Chaiyuth Sae-Kung; Bhinyo Panijpan; Wannapong Triampo; Darapond Triampo; Rajabhat Maha Sarakham University. Faculty of Education; National Science and Technology Development Agency; Mahidol University. Institute for Innovation and Development of Learning Process; Mahidol University. Faculty of ScienceThe physicochemical properties of synthesized TiO2 nanoparticles from integrating sol-gel with flame-based techniques were studied. The synthesized nanoparticles properties were compared after using methanol, ethanol, and propanol fuel sources. The synthesized TiO2 were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal analysis (thermogravimetric analysis, TGA, and differential scanning calorimetry, DSC), and surface area Brunauer–Emmett–Teller (BET) method. The photocatalytic activity of TiO2 nanoparticles was investigated by measuring the degradation of methylene blue. It was found that methanol and ethanol burners can be used as an alternative furnace that can yield TiO2 nanoparticles with physicochemical properties comparable to that of commercial TiO2 nanoparticles, while a propanol burner cannot be used as an alternative fuel.Publication Metadata only Silica Aerogel Thermal Insulation Coating as Commodity Usage(2020-05-13) Noppakun Sanpo; Jaturong Jitputti; Peeranut Prakulpawong; Chadapon Srikamut; Supan Yodyingyong; Darapond Triampo; SCG Chemicals Co., Ltd.; Mahidol University© Published under licence by IOP Publishing Ltd. Silica aerogel-based thermal insulation coating (SA-coating) was prepared from a commercial acrylic binder. The purpose of this investigation is to determine the effectiveness of SA-coating with the application in energy-efficient home design for temperature insulation purposes. The weather acceleration test and thermal insulation property of SA-coating were investigated and compared to the original commercial binder. The weather acceleration test of SA-coating showed equivalent weathering stability and robustness compared to the original binder. The thermal insulation property was performed from an in-lab setup, called temperature difference (TD) measurement. In a closed chamber, without air circulation, the surface temperature with SA-coating was reduced by as much as 26 degrees from 90°C to ∼64°C. More so, if TD measurement was performed in a ventilated area, the temperature can be reduced from 50°C to 36°C (room temperature was 31 °C). The thermal conductivity of the coating at different temperatures was also measured. The water contact angle measurements and the scanning electron micrographs showed that SA-coating can be made hydrophilic to hydrophobic by simple abrasion.Publication Metadata only Synthesis study of silver-doped zinc oxide for near-infrared shielding applications(2020-01-01) Sujittra Kaenphakdee; Supan Yodyingyong; Jeerapond Leelawattanachai; Wannapong Triampo; Noppakun Sanpo; Jaturong Jitputti; Darapond Triampo; SCG Chemicals Co., Ltd.; Mahidol University; Thailand National Science and Technology Development Agency© 2020 Trans Tech Publications Ltd, Switzerland. Undoped ZnO and Ag-doped ZnO were prepared to use as near-infrared (NIR) shielding by simple precipitation method with zinc acetate and zinc nitrate as Zn precursor and silver nitrate as Ag precursor. The Ag-doped ZnO and undoped ZnO were characterized by XRD, SEM, and UV-vis-NIR spectrophotometer. The NIR reflectance performance reveals that Ag-doping improves the NIR shielding and optical property of pure ZnO. The 10 mol% Ag loading shows the lowest reflection in the visible region of about 15% and the highest reflection in the NIR region of about 50%. It not only shows the best NIR reflection but also exhibits the best thermal insulation. It reduces the inner temperature of the in-lab setup to mimic a house by 7.5°C when compared to the uncoated glass window. It is concluded that 10 mol% Ag-doped ZnO nanoparticles can result in UV-NIR shielding coatings.Item Metadata only Teaching colloids : hands-on activity learning unit to enhance students' undersranding on the effect of particle size in solution / Tshering Nidup(Mahidol University. Mahidol University Library and Knowledge Center, 2015) Nidup, Tshering, 1986-; Supan Yodyingyong; Pirom Chenprakhon; Wannapong TriampoUnderstanding the role played by size of the particles is very important as manipulation of such materials in a nanoscale has brought wider societal implications. Such technology has touched our life and it is therefore vital for our students to at least have some awareness of such an emerging field. Teaching of concepts in this field is popular in colleges and the need of infusion is felt at the school level also. However, the Bhutanese curriculum is still in its infancy and availability of technologies and equipment are difficult and expensive. However, the colloid concept under the science curriculum of grade XI-XII chemistry provides an opportunity for the students to explore and relate the effect of size of particles by relating to the scattering of light. Since most of the teachings in Bhutanese classrooms are dominated by traditional style, the use of active hands-on learning involving more of an inquiry approach is recommended. In addition, studies show that the hands-on activity and inquiry lab as an effective drive for learning chemistry. Therefore, a hands-on activity learning unit based on the inquiry lab learning approach was designed to help students understand about the effect of size of particles in the solution through the teaching of colloid concept and also to see their perception towards the learning unit. One group pretest-posttest design was implemented to 43 grade XI science students in one of the schools located in the southeastern region of Bhutan. The whole activities of the learning unit are encapsulated into two lessons for enhancing students' understanding about the effect of size of particles. The guided inquiry lesson includes activities to differentiate solution, suspension and colloids through the properties of filterability, homogeneity, gravitational, the Tyndall effect and appearance. The structured inquiry lesson involves the preparation of colloids through the sol-gel process with the use of LED laser to understand about the nanoparticle and the scattering by nanoparticles. A Total of five instruments were used to collect data through the implementation of teacher-designed activities. The data from the colloidal achievement test, students' reflection, perception questionnaire, semi-structured interview and students' document show enhancement of students' understanding of the effect of particle size in the solution and positive perception towards the learning unit. The results also show some challenges and difficulties which students faced due to little or lack of experience learning from such an approach. Some of the key points expressed by the students like laboratory experience, new learning approach, tools and materials, interest, group work and time issues are discussed along with its implication and limitation.Publication Metadata only ZnO nanoparticles and nanowire array hybrid photoanodes for dye-sensitized solar cells(2010-03-01) Supan Yodyingyong; Qifeng Zhang; Kwangsuk Park; Christopher S. Dandeneau; Xiaoyuan Zhou; Darapond Triampo; Guozhong Cao; University of Washington, Seattle; Mahidol UniversityZnO nanoparticle-nanowire (NP-NW) array hybrid photoanodes for dye-sensitized solar cell (DSC) with NW arrays to serve as a direct pathway for fast electron transport and NPs dispersed between NWs to offer a high specific surface area for sufficient dye adsorption has been fabricated and investigated to improve the power conversion efficiency (PCE). The overall PCE of the ZnO hybrid photoanode DSC with the N3-sensitized has reached ∼4.2%, much higher than both ∼1.58% of ZnO NW DSC and ∼1.31% of ZnO NP DSC, prepared and tested under otherwise identical conditions. © 2010 American Institute of Physics.