Due to the special structural defects, SnO 2 -based nanomaterials show full potentials for applying to photocatalysis. In this work, we explore the relationship between photocatalysis and growth mechanism of SnO 2 nanocrystals. Through a pH-modifying method, the growth of SnO 2 nanocrystals follows Ostwald ripening (OR) mode at pH = 9, and oriented attachment (OA) mode at pH = 1.5, respectively. We comprehensively studied the structural characteristics of SnO 2 nanocrystals by investigating high-resolution transmission electron microscope, x-ray diffraction, Brunauer–Emmett–Teller nitrogen physisorption, UV–vis diffuses reflectance, and photoluminescence spectra, and the results with growth dynamic simulation show that OA mode is obviously different from OR mode, and the photocatalytic performance of SnO 2 nanocrystals varies under different growth mechanisms. The factors including crystal structure, particle size, and defects...

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SnO 2纳米晶体的光催化与生长机理的相关性

由于特殊的结构缺陷，SnO 2基纳米材料显示出了用于光催化的全部潜力。在这项工作中，我们探索了SnO 2纳米晶体的光催化与生长机理之间的关系。通过pH修改方法，SnO 2纳米晶体的生长分别在pH = 9时遵循奥斯特瓦尔德成熟（OR）模式和在pH = 1.5时遵循定向附着（OA）模式。我们通过研究高分辨率透射电子显微镜，x射线衍射，Brunauer-Emmett-Teller氮的物理吸附，UV-vis散射反射率和光致发光光谱，全面研究了SnO 2纳米晶体的结构特征，并用生长动力学模拟结果表明OA模式明显不同于OR模式，SnO 2纳米晶体的光催化性能在不同的生长机理下有所不同。这些因素包括晶体结构，粒度和缺陷...