Photocatalysis of aqueous PFOA by common catalysts of In2O3, Ga2O3, TiO2, CeO2 and CdS: influence factors and mechanistic insights

Fu, Caixia1,2; Xu, Xiuru3; Zheng, Chunmiao2; Liu, Xinjie2; Zhao, Dandan4; Qiu, Wenhui5

2022

10.1007/s10653-021-01127-2

ENVIRONMENTAL GEOCHEMISTRY AND HEALTH   影响因子和分区

0269-4042

1573-2983

Gallium oxide (Ga2O3), titanium dioxide (TiO2), cerium dioxide (CeO2), indium oxide (In2O3) and cadmium sulfide (CdS) were commonly used under UV light as photocatalysis system for the pollutants' degradation. In this study, these five catalysts were applied for the photodegradation of perfluorooctanoic acid (PFOA), a well-known perfluoroalkyl substance (PFAS). As a result, the PFOA photodegradation performance was sequenced as: Ga2O3 > TiO2 > CeO2 > In2O3 > CdS. To further explain the photocatalysis mechanism, the effects of initial pH, photon energy and band gap were evaluated. The initial pH of 3 +/- 0.2 hinders the catalytic reaction of CdS, resulting in low degradation of PFOA, while it has no significant effect on Ga2O3, TiO2, CeO2 and In2O3. In addition, quantum yield was sequenced as TiO2 > CeO2 > Ga2O3 > In2O3, which may not be the main factor determining the degradation effect. Notably, the band gap energy from large to narrow was as: Ga2O3 > TiO2 > CeO2 > In2O3 > CdS, which exactly matched their degradation performance.

Band gap energy Commercial catalysts Initial pH Photon energy Perfluorooctanoic acid Photogenerated electrons

SCI ; EI

英语

通讯

China Scholarship Council (CSC)[201606890028]

Engineering ; Environmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Public, Environmental & Occupational Health ; Water Resources

WOS:000745421400002

SPRINGER

ENVIRONMENT/ECOLOGY

Web of Science

1.Harbin Inst Technol, Sch Environm, Harbin 150090, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Wenzhou Vocat Coll Sci & Technol, Sch Agr & Biol Technol, Wenzhou 325006, Zhejiang, Peoples R China
4.Aalto Univ, Dept Built Environm, POB 15200, Espoo 00076, Finland
5.Southern Univ Sci & Technol, Sch Publ Hlth & Emergency Management, Shenzhen 518055, Peoples R China

Fu, Caixia,Xu, Xiuru,Zheng, Chunmiao,et al. Photocatalysis of aqueous PFOA by common catalysts of In2O3, Ga2O3, TiO2, CeO2 and CdS: influence factors and mechanistic insights[J]. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,2022.

Fu, Caixia,Xu, Xiuru,Zheng, Chunmiao,Liu, Xinjie,Zhao, Dandan,&Qiu, Wenhui.(2022).Photocatalysis of aqueous PFOA by common catalysts of In2O3, Ga2O3, TiO2, CeO2 and CdS: influence factors and mechanistic insights.ENVIRONMENTAL GEOCHEMISTRY AND HEALTH.

Fu, Caixia,et al."Photocatalysis of aqueous PFOA by common catalysts of In2O3, Ga2O3, TiO2, CeO2 and CdS: influence factors and mechanistic insights".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH (2022).