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中文摘要：
以过渡金属离子M（M代表Cr或V）掺杂为改性手段,通过改变掺杂量,合成了一系列分子筛光催化剂M（x）-HMS （x代表M/Si投料摩尔比）.用X射线荧光光谱（XRF）、低温N2吸附-脱附、X射线衍射（XRD）、紫外-可见吸收漫反射光谱（UV-vis）、高分辨透射电子显微镜（HRTEM）和X射线能量散射谱（EDXS）对M（x）-HMS进行了表征和分析.以高压汞灯为光源,以甲酸分解产氢为探针反应,研究了M（x）-HMS的光催化性能,发现Cr（x）-HMS和V（x）-HMS的产氢速率随组成变化呈双峰规律（均在x=0.01和0.05时出现两个极大值）,并从光催化剂的组成和结构角度给予了解释.
英文摘要：
A series of transition metal doped photocatalysts, denoted as M（x）-HMS （here, M represents Cr or V, x represents the molar ratio of M/Si in the feed reagents and HMS represents hexagonal mesoporous silica molecular sieves）, were synthesized by adjusting the value of x. The HMS materials were characterized and analyzed by X-ray fluorescence spectroscopy （XRF）, N2 adsorption-desorption isotherms, X-ray diffraction patterns （XRD）, ultraviolet-visible diffuse reflectance spectra （UV-vis）, high-resolution transmission electron microscopy （HRTEM） and energy dispersive X-ray spectroscopy （EDXS）. The photocatalytic activity was investigated using high pressure mercury lamp as the light source and the decomposition of formic acid to produce hydrogen as probe-reaction. Interestingly, the rate of hydrogen production for both Cr（x）-HMS and V（x）-HMS shows bimodal character which coincidentally corresponds to the x value of 0.01 and 0.05, and it was interpreted in terms of the components and structures of M（x）-HMS.
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