【摘 要】
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In this paper,a heterojunction of hierarchically one-dimensional(1D)cadmium sulfide(CdS)nanowires decorated on the two-dimensional(2D)La2Ti2O7(LTO)has been fabr
【机 构】
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School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,Chin
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In this paper,a heterojunction of hierarchically one-dimensional(1D)cadmium sulfide(CdS)nanowires decorated on the two-dimensional(2D)La2Ti2O7(LTO)has been fabricated by a simple two-step hydrothermal process.The structure,morphology and surface chemical composition of CdS/LTO were studied by a variety of characterizations,in which the X-ray photoelectron spec-troscopy(XPS)results showed a strong interaction between CdS and LTO through S-O bonds.The type Ⅱ band alignment of CdS/LTO for favorable electron transfer from CdS to LTO and hole transfer from LTO to CdS was clarified by ultraviolet-visible(UV-Vis)diffuse reflec-tance spectroscopy and Mott-Schottky(M-S)plot mea-surements.In the absence of any co-catalyst,H2 production from water splitting and Rhodamine B(RhB)decomposi-tion in aqueous solution were carried out to evaluate the photocatalytic activities,showing that the photocatalytic performance of CdS/LTO was superior to that of pure LTO and CdS under visible light and simulated sunlight.The optimal CdS content in the CdS/LTO system was determined to be 7.5 wt%.The present results show an effective pathway to design a 1D/2D heterojunction pho-tocatalyst in the face of overwhelming problems of energy crisis and environmental pollution.
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