Comparing Two New Composite Photocatalysts, t-LaVO4/g-C3N4 and m-LaVO4/g-C3N4, for Their Structures and Performances
Comparing Two New Composite Photocatalysts, t-LaVO4/g-C3N4 and m-LaVO4/g-C3N4, for Their Structures and Performances
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比较两种新型复合光催化剂 t-LaVO4/g-C3N4 和 m-LaVO4/g-C3N4 的结构和性能
DOI：
10.1021/ie4043856
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发表时间：
2014-04-09
影响因子：
4.2
通讯作者：
Fan, Maohong
中科院分区：
文献类型：
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作者：
He, Yiming;Cai, Jun;Fan, Maohong
本研究的目的是制备、表征和评价两种新型复合光催化剂：t-LaVO 4/g-C3 N4和m-LaVO 4/g-C3 N4。以m-LaVO 4或t-LaVO 4和g-C3 N4为原料合成了两种催化剂，并采用BET法、热重分析（TGA）、X射线衍射（XRD）、傅里叶变换红外（FT-IR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、紫外-可见光（UV-vis）漫反射光谱（DRS）和光致发光（PL）光谱。结构表征表明，两种复合材料具有相似的相组成。它们都是由LaVO_4和g-C_3 N_4组成。同时，它们的光吸收性能也相似。光催化性能测试结果表明，m-LaVO 4和t-LaVO 4均能有效地提高g-C3 N4的光催化活性。
The objective of this research was to prepare, characterize, and evaluate two new composite photocatalysts: t-LaVO4/g-C3N4 and m-LaVO4/g-C3N4. The two catalysts were synthesized with m-LaVO4 or t-LaVO4 and g-C3N4, and characterized by various techniques including Brunauer–Emmett–Teller method (BET), thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible-light (UV-vis) diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The structure characterizations indicate that the two composites have similar phase composition. Both of them consist of LaVO4 and g-C3N4. Meanwhile, their photoabsorption performance is also similar. The photocatalytic test indicates that both m-LaVO4 and t-LaVO4 can effectively promote the photoactivity of g-C3N4, as demonstrated with the PL and photocurrent–time experiments...