| Title: | Unique insights into photocatalytic VOCs oxidation over WO(3)/carbon dots nanohybrids assisted by water activation and electron transfer at interfaces |
| Author(s): | Huang G; Liu L; Chen L; Gao L; Zhu J; Fu H; |
| Address: | "Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China. Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China. Electronic address: liulj@wtu.edu.cn. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200433, PR China. Electronic address: fuhb@fudan.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2021.127134 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Internal electric field (IEF) at heterojunction interfaces can separate photoexcited charge carriers and promote photocatalytic performance. Here we have modified WO(3) nanoplates with carbon dots (CDs) and constructed an interfacial IEF directing from CDs to WO(3) with assistance of their remarkably different work functions. Such electric field drove photoexcited electrons to transport towards CDs and retained photoexcited holes to stay at WO(3), achieving electron/hole spatial separation. H(2)O preferred chemisorption on the five-coordinated W atoms of WO(3) with an elongated H-O bond and bent H-O-H angle, which allowed the activation of H(2)O and favorable production of .OH radicals. The WO(3)/CDs (WC1) showed a superior photocatalytic activity for visible-light photooxidation of HCHO and CH(3)COCH(3) with CO(2) production rate of 411 and 188 mumol g(-1) h(-1), respectively, outperforming most of WO(3)-based photocatalysts. The enhanced photocatalytic performance correlated with the IEF-induced charge separation, favorable .OH production and VOCs chemisorption. Our work confirms the role of CDs cocatalyst in the photocatalytic oxidation of VOCs, which will inspire enthusiasm to develop more advanced heterojunction photocatalysts involving carbon nanomaterials" |
| Keywords: | Electron/hole separation Photodegradation Tungsten oxide Volatile organic compounds Water activation; |
| Notes: | "PubMed-not-MEDLINEHuang, Guimei Liu, Lijun Chen, Lv Gao, Lingfeng Zhu, Junjiang Fu, Hongbo eng Netherlands 2021/09/18 J Hazard Mater. 2022 Feb 5; 423(Pt B):127134. doi: 10.1016/j.jhazmat.2021.127134. Epub 2021 Sep 10" |
