首页|Effect of cobalt doping on the photocatalytic performance of AgInS2 for organic pollutant degradation and hydrogen production
Effect of cobalt doping on the photocatalytic performance of AgInS2 for organic pollutant degradation and hydrogen production
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NSTL
Elsevier
? 2022 Elsevier B.V.In this work, AgInS2 (AIS) and cobalt (Co) doped AgInS2 (Co-AIS) are prepared by low-temperature liquid phase method using thioglycolic acid (TGA) as the stabilizing agent. The crystal structure, surface elements, binding energy, particle morphology, and optical properties of AIS and Co-AIS are analyzed by XRD, XPS, SEM, TEM, UV-Vis-DRS, and PL. Rhodamine B (RhB) and 4-nitrophenol (4-NP) are used as the model pollutants for evaluating the photocatalytic activities of AIS and Co-AIS. The optimal doping ratio of Co?In is found to be 10.7:6.3. And, under this optimal ratio, Co-AIS can degrade 95 % of RhB in 1.5 h or 76 % of 4-NP in 2.5 h, respectively. The photocatalytic mechanism is proposed based on the active species trapping experiment, EPR technique, optical properties characterization, and the flat-band potential determination. Moreover, the photocatalytic water splitting performance of Co-AISs with or without the modification of the multi-walled carbon nanotubes (MWCNTs) are investigated, and remarkable hydrogen production is achieved. This research will open a new gateway to synthesizing AgInS2-based materials and exploring their photocatalytic activities.
NSTL
Elsevier
