中文摘要：

以H（40）N（41）W（12）·xH2O为钨源,硫酸为酸化剂,通过水热法合成前驱体,经一定的热处理后制得单斜晶系WO3,再将WO3与p型半导体物质CuCrO2复合后得到的WO3-CuCrO2复合催化剂用于光催化分解纯水产氢的实验。通过对所得WO3样品的X射线衍射（XRD）、扫描电子显微镜（SEM）、紫外可见漫反射（UV-Vis-DR）光谱分析及光催化活性测试,分别考察了硫酸用量、硫酸铵等量替代硫酸及后期热处理过程对制得WO3的形貌、尺寸及光催化性能的影响。结果表明：当硫酸用量为6.8 mmol且硫酸铵等量替代2.7 mmol硫酸时得到的WO3性能较优,其粒径较小,分散较为均匀,以其制得的WO3-CuCrO2复合催化剂光催化产氢活性较高,后期热处理过程对WO3样品晶型、形貌、吸收光的性能及复合样品WO3-CuCrO2的光催化性能有很大的影响。

英文摘要：

WO3＇s precursor was synthesized by hydrothermal method with H（40）N（41）W（12）·x H2O as raw material,and sulfuric acid as acidifier. The monoclinic WO3 was obtained by certain heat treating the precursor and then was coupled with CuCrO2 to fabricate the WO3-CuCrO2 composite photocatalyst. The WO3-CuCrO2 composite photocatalyst was used for hydrogen evolution from water splitting. The effect of sulfuric acid amounts,and of ammonium sulfate substituting the sulfuric acid（ in equal molar amount） as well as the heat treatment process on the morphology, size and photocatalytic activity of as-synthesized samples were investigated by X-ray diffraction（ XRD）,scanning electron microscope,ultraviolet-visible diffuse reflectance and photocatalytic test. The result shows that,when the amount of sulfuric acid was 6. 8 mmol and ammonium sulfate equally substituting 2. 7 mmol sulfuric acid,the WO3 synthesized has small uniform particle and WO3-CuCrO2 show better photocatalytic property. The heat treatment process has a great influence on the crystal,morphology,light absorption of WO3 as well as the photocatalytic activity of WO3-CuCrO2.