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Experimental study on visible-light induced photocatalytic oxidation of gaseous formaldehyde by polyester fiber supported photocatalysts

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Experimental study on visible-light induced photocatalytic oxidation of gaseous formaldehyde by polyester fiber supported photocatalysts
นักวิจัย : Han, Zhenan , Chang, Victor Wei-Chung , Wang, Xiaoping , Lim, Teik-Thye , Hildemann, Lynn
คำค้น : DRNTU::Science::Chemistry::Physical chemistry::Photochemistry
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Han, Z., Chang, V. W.-C., Wang, X., Lim,T. T., & Hildemann, L. (2012). Experimental study on visible-light induced photocatalytic oxidation of gaseous formaldehyde by polyester fiber supported photocatalysts. Chemical engineering journal, 218, 9-18. , http://hdl.handle.net/10220/9969 , http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1016/j.cej.2012.12.025 , 171692
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Chemical engineering journal
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Heterogeneous photocatalytic oxidation (PCO) has shown large potentials in controlling airborne gaseous pollutants such as volatile organic compounds (VOCs). This article addresses PCO of gaseous formaldehyde (HCHO) by VIS-active photocatalysts which were immobilized on polyester fiber filter through a spray coating method under room temperature. The coatings showed good dispersion and strong adhesion on the fiber surface as supported by the SEM images and the stability test result. High PCO efficiency was achieved by the spray-coated filter under typical room light illumination. The effects from various reaction parameters, such as volumetric flow rate, pollutant initial concentration, relative humidity, illumination strength, as well as photocatalyst loading amount, on the PCO efficiency were also evaluated systematically. A Langmuir–Hinshelwood model was used to examine the kinetics of VIS-PCO of HCHO. One of the important findings was that changes of relative humidity had little influence on the PCO efficiency at either low or high HCHO concentrations. Different from the UV-PCO process where hydroxyl radical (OHradical dot) is the major oxidative species, the VIS-generated holes, View the MathML sourcehVIS+, as well as the superoxide radical (View the MathML sourceO2-) were considered to contribute predominantly to the degradation of HCHO under visible light illumination.

บรรณานุกรม :
Han, Zhenan , Chang, Victor Wei-Chung , Wang, Xiaoping , Lim, Teik-Thye , Hildemann, Lynn . (2555). Experimental study on visible-light induced photocatalytic oxidation of gaseous formaldehyde by polyester fiber supported photocatalysts.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Han, Zhenan , Chang, Victor Wei-Chung , Wang, Xiaoping , Lim, Teik-Thye , Hildemann, Lynn . 2555. "Experimental study on visible-light induced photocatalytic oxidation of gaseous formaldehyde by polyester fiber supported photocatalysts".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Han, Zhenan , Chang, Victor Wei-Chung , Wang, Xiaoping , Lim, Teik-Thye , Hildemann, Lynn . "Experimental study on visible-light induced photocatalytic oxidation of gaseous formaldehyde by polyester fiber supported photocatalysts."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Han, Zhenan , Chang, Victor Wei-Chung , Wang, Xiaoping , Lim, Teik-Thye , Hildemann, Lynn . Experimental study on visible-light induced photocatalytic oxidation of gaseous formaldehyde by polyester fiber supported photocatalysts. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.