当前位置: X-MOL 学术Mol. Catal. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Synthesis of [email protected]–Te composites with p–n heterostructures for enhanced photocatalytic hydrogen production by microwave-assisted hydrothermal method
Molecular Catalysis ( IF 3.9 ) Pub Date : 2018-01-06 , DOI: 10.1016/j.mcat.2018.01.001
Zichan Xin , Li Li , Wenzhi Zhang , Tingting Sui , Yixuan Li , Xinyue Zhang

In this paper, [email protected]–Te composites with visible light response were successfully prepared by microwave-assisted hydrothermal method. X-ray diffraction(XRD), UV–vis diffuse reflectance spectroscopy (UV–vis/DRS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy–energy dispersive spectrometer (SEM–EDS), high-resolution transmission electron microscopy (HR-TEM), and N2 adsorption–desorption measurements were utilized to test the structure, composition, morphology, surface physical and chemical properties, and optical absorption properties of [email protected]–Te. The results show that the composites consist of hexagonal Te, hexagonal CdS, and cubic ZnS. Compared with CdS–Te, the crystallinity of [email protected]–Te is significantly improved. The composites introduce ZnS, which inhibites the growth of (110) crystal plane of CdS. In addition, the obtained products have uniform size and the shape of the string structure. Furthermore, the crystallite size, specific surface area, and pore volume have a significant increase after recombination. Using malachite green (MG) as the model molecule, a series of photocatalysts degradation of MG was studied and compared. The results of photocatalytic degradation show that the synthesized [email protected]–Te composites own favourable photocatalytic performance under ultraviolet light, visible light, and simulated sunlight. Moreover, compared with the monomer, [email protected]–Te composites exhibit excellent hydrogen production capacity (592.5 μmol g−1 h−1), which is 48.4 times larger than the activity of commercial P25. Besides that, [email protected]–Te composites could maintain high hydrolysis capacity of hydrogen after four cycles, proving that the composites have certain stability.



中文翻译:

微波辅助水热法合成[ p-n]异质结构的[受电子邮件保护] -Te复合材料以增强光催化制氢

本文通过微波辅助水热法成功制备了具有可见光响应的[电子邮件保护] -Te复合材料。X射线衍射(XRD),紫外可见漫反射光谱(UV-vis / DRS),X射线光电子能谱(XPS),扫描电子显微镜-能量色散光谱仪(SEM-EDS),高分辨率透射电子显微镜(HR-TEM)和N 2吸附-解吸测量用于测试[电子邮件保护] -Te的结构,组成,形态,表面物理和化学性质以及光吸收性质。结果表明,复合材料由六方Te,六方CdS和立方ZnS组成。与CdS-Te相比,[受电子邮件保护的] -Te的结晶度得到了显着改善。该复合材料引入了ZnS,ZnS抑制了CdS的(110)晶面的生长。另外,所获得的产品具有均匀的尺寸和线状结构的形状。此外,复合后,微晶尺寸,比表面积和孔体积显着增加。以孔雀石绿(MG)为模型分子,研究和比较了一系列光催化降解MG的方法。光催化降解的结果表明,合成的[受电子邮件保护的] -Te复合材料在紫外光,可见光和模拟太阳光下具有良好的光催化性能。此外,与单体相比,[电子邮件保护] -Te复合材料具有出色的制氢能力(592.5μmolg-1  h -1),比市售P25的活性大48.4倍。除此之外,[电子邮件保护] -Te复合材料在四个循环后仍可保持较高的氢水解能力,证明该复合材料具有一定的稳定性。

更新日期:2018-01-06
down
wechat
bug