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- W2143733558 abstract "This work aimed to investigate the interparticle electron transfer (IPET) process within the coupled-photocatalyst systems on the basis of the degradation of 4-chlorophenol (4-CP). TiO2, ZnO and SnO2 are used as the model photocatalysts owing to their increasing energy levels which correspond to the IPET concept. In the single-photocatalyst tests, ZnO tests are associated with the highest degradation rate constants (0.347 ± 0.083 h−1 at pH 7 and 0.453 ± 0.011 h−1 at pH 11) and a better DOC reduction than in other single catalyst tests under given conditions. ZnO/SnO2 coupled tests have constants of 0.612 ± 0.068 and 0.948 ± 0.069 h−1 at pH 7 and 11, respectively. Additionally, the 4-CP prefers the breakdown of chloride group in TiO2 system while proceeding hydroxylation reaction in ZnO systems. Meanwhile, a phenomenonlogical model coupled with the IPET effect was developed to explore the separation of photo-electrons and photo-holes within catalysts. Based on the model parameters, the recombination rate of photo-electrons and photo-holes in TiO2/SnO2 and ZnO/SnO2 systems is 20–45% lower than that obtained by a respective single catalyst. Thus, coupled-photocatalyst tests, TiO2/SnO2 and ZnO/SnO2 efficiently suppress the recombination, particularly for ZnO/SnO2 tests at pH 11." @default.
- W2143733558 created "2016-06-24" @default.
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- W2143733558 date "2006-10-01" @default.
- W2143733558 modified "2023-10-16" @default.
- W2143733558 title "Exploring the interparticle electron transfer process in the photocatalytic oxidation of 4-chlorophenol" @default.
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- W2143733558 doi "https://doi.org/10.1016/j.jhazmat.2006.03.023" @default.
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