Z‐scheme CuSbS₂/ZnO Heterojunction for Enhanced Photocatalytic Degradation of RhB

Abstract

The heterojunction structure photocatalysts are very promising for photocatalytic degradation dyes to resolve the organic industrial wastewater. In this work, an effective and solar lightdriven Z-scheme heterojunction photocatalyst CAS/ZnO was prepared by two steps microwave irradiation method. The ZnO nanosheets were successfully compounded with CAS tetragonal particles aggregate. As the ZnO concentration increased, the absorbance decreased but the specific surface area increased. Rhodamine B (RhB) was tested for photodegradation by photocatalysts under a solar simulation in 120 min, and 3 M displayed the highest degradation rate (100 %), highest rate constant (0.021 min À 1 ) and optimum stability. Furthermore, the main reactive species were superoxide radicals (O 2 À *) and hydroxyl radicals (HO * ). Also, mechanism of the Z-scheme migration of photon-generated carrier and photocatalytic degradation was proposed. This paper provides a new Zscheme heterojunction CAS/ZnO photocatalyst for the treatment of organic pollutants.

Influence of sulfur source on properties of CuSbS2 particles

“…The recombination rate of photoinduced carriers could be explained by photoluminescence (PL), and the low intensity of the peak implies a lower recombination rate (figure 6(a)) [17]. Thus, the sample with thiourea as sulfur source has stronger carrier migration ability, and the samples prepared using different sulfur sources have different energy level defect, which may be caused by different band gap and defect type.…”

Study of ZnO‐coated Modified Hollow Microsphere Insulation Coated Fabrics

“…Zhi et al. prepared an effective, sunlight‐driven Z‐type heterojunction photocatalyst CAS/ZnO by a two‐step microwave irradiation method [19] …”

“…[18] Zhi et al prepared an effective, sunlight-driven Z-type heterojunction photocatalyst CAS/ZnO by a two-step microwave irradiation method. [19] To further improve TEMs performance, surface-modified thermally expanded microspheres were developed and reported in the application of artificial adhesives, [20] biomicrofluids, [21,22] sensors, [23] antistatic materials, etc. Thus, surface-functionalized TEMs play a critical role in their many applications.…”