02826nas a2200265 a 450000500170000000800410001703500150005810000260007324500740009926000670017330000230024049000270026350001500029050200590044052016490049965000150214865000350216365000540219870000360225270000480228870000430233671000570237981000590243685600650249520260817163008.0210704s2021    th u  m rtt   000 a eng d  a.b123719320 aNatakorn Thamthinawut10aApplication of zinc oxide on indoor volatile organic compound removal  aPathum Thani, Thailand :bAsian Institute of Technology,c2021  a48 leaves :bill. 1 aThesis ;vno. EV-21-09  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management  aThesis (M. Eng.) - Asian Institute of Technology, 2021  aNowadays, indoor air quality is a concern of many people since people spend long time  indoor than outdoor, and it can cause health problems. Indoor air pollutants are referring to  total suspended particles (TSP), Sulfur Dioxide (SO2), Nitrogen Oxides (NOx), and Volatile  Organic Compounds (VOCs), etc. Recently, Photocatalyst has been used to remove VOCs  for improve indoor air quality. However, the effects of Photocatalyst on the Toluene as total  VOCs concentration have not been studied.  In this study, the photocatalytic reactor with the size of 22 x 28 x 20 cm3 which was a  rectangular box with a volume of 8.5 L was used. An electric fan of 5 V was placed inside  the box for completely mix of a Toluene gas in the box. The catalyst plates with the size of  15 x 20 cm2 and a brass valve of 1/4 inches with polyurethane tube of 1/8 inches were used  for gas sampling. The measurement of VOC concentration was done by MiniRAE 3000. A Zinc Oxide (ZnO) was coated on glass sheet by hydrothermal synthesis of ZnO nanorods which could provide photocatalytic activity with visible light from halogen lamp source. The  catalyst absorption spectrums were peak at 360 nm. The photocatalytic activity test in  methylene blue under visible light irradiation demonstrated that there was photocatalytic  activity by removing methylene blue by 25% more than photolysis by the removal with only  halogen lamp. For the effect of ZnO catalyst with VOC removal, the ZnO catalyst removed  12.57% of VOC at catalyst area per air volume of 37.6 cm2 /L with an irradiation of 450  W/m2 . Increasing in catalyst area increased the VOC removal efficiency. 0aZinc oxide 0aAirxPollutionxHealth aspects 0aVolatile organic compoundsxEnvironmental aspects0 aEkbordin Winijkul,eChairperson0 aThammarat Koottatep,eExamination Committee1 aBora, Tanujjal,eExamination committee2 aRoyal Thai Government Fellowship,eScholarship Donor2 aAsian Institute of Technology.tThesis ;vno. EV-21-09  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B13480