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Effect of visible light irradiation on hydrogen production by CoNi2S4/CdWO4 controllable flower spherical photocatalyst
摘要： The CoNi2S4/CdWO4-3 (CNS/CW-3) was an excellent photocatalyst for hydrogen evolution. The controlled morphology of CNS/CW-3 was successfully by adding thiourea as sulfur source and TBA to control the CoNi2S4 nanoparticles. The photocatalytic hydrogen evolution activity of CoNi2S4 and CdWO4 under visible light irradiation were studied with different CoNi2S4 incorporation ratios. UV-vis absorption spectra showed that the absorbance of CNS/CW-3 composite catalyst increased significantly after doping CoNi2S4. The electrochemical and photoelectrochemical experiments also showed that the charge separation and electron transfer efficiency were higher when CoNi2S4 was attached to CdWO4. CNS/CW-3 exhibited excellent photocatalytic activity for hydrogen evolution under visible light irradiation. Its hydrogen evolution activity reached 269.08 μmol in 5 h, and had good light stability. It was a potential
关键词： CoNi2S4/CdWO4,controllable spherical,photocatalytic
更新于2025-11-21 11:18:25
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Synthesis and characterization of Fe-doped CdWO <sub/>4</sub> nanoparticles with enhanced photocatalytic activity
摘要： The Fe-doped CdWO4 nanoparticles were successfully synthesized via a hydrothermal method. The morphology, crystal structure and photocatalytic activity of the products were characterized and investigated. The results show that the Fe-doping can enhance the photocatalytic efficiency of CdWO4 for degradation of methyl orange toxic dye. The optimal Fe/Cd atomic ratio of Fe-doped CdWO4 is identified to be 0.10. The high activity of the Fe-doped CdWO4 catalyst would be attributed to the decrease of grain size and the doped Fe ions can trap and transfer the electron–hole pairs.
关键词： doping,photocatalytic,CdWO4,methyl orange,Fe ion
更新于2025-09-23 15:23:52
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Enhanced photocatalytic hydrogen evolution of?CdWO4 through polar organic molecule modification
摘要： In this work, a polar molecule 4-mercaptobenzoic acid (4-MBA) is anchored on the surface of CdWO4 by forming CdeS and WeS bond. Photocatalytic hydrogen evolution is significantly enhanced (about 3.41 times) after the modification. The reason is due to the modification of 4-MBA, which results in a polar surface and built-in electric field. The polar surface is confirmed by the steady state and time-resolved PL spectra, Voc and SHG results.
关键词： CdWO4,Photocatalytic hydrogen evolution,4-mercaptobenzoic acid,Surface modification,Built-in electric field
更新于2025-09-19 17:15:36
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Multi-mode photocatalytic performances of CdS QDs modified CdIn2S4/CdWO4 nanocomposites with high electron transfer ability
摘要： In general, quantum dots have the property of generating a plurality of charge carriers using hot electrons or using a single high-energy photon to improve the photocatalytic properties of the material. In this paper, CdS QDs@CdIn2S4/CdWO4 modified by CdS QDs was synthesized by the microwave-assisted hydrothermal method, and its composition, crystal structure, morphology, and surface physicochemical properties were well characterized. Electron microscopy results showed that CdS QDs@CdIn2S4/CdWO4 composite material exhibited a sheet structure with a length of ca. 350 nm and a width of ca. 50 nm, and CdS QDs uniformly distributes with a diameter of about 5 nm on the sheet structure. UV-visible diffuse reflectance tests showed that the combination of CdS QDs and CdIn2S4 can extend the light absorption range of CdWO4 to the visible region. Photoluminescence spectroscopy confirmed that CdS QDs had efficient electron transport capabilities. The multi-mode photocatalytic activity of CdS QDs@CdIn2S4/CdWO4 showed an excellent ability to degrade organic pollutants. Under the conditions of no co-catalyst and Na2S-Na2SO3 as the sacrificial agent, the hydrogen production of CdS QDs@CdIn2S4/CdWO4 can reach 221.3 μmol g?1 when exposed to visible light (λ > 420 nm) for 8 h.
关键词： CdS QDs,Quantum dots,Microwave-assisted hydrothermal method,CdWO4,Multimode photocatalysis,H2 evolution,CdIn2S4
更新于2025-09-10 09:29:36