阵列式BiOCl/C60单晶面暴露自组装薄膜的制备与产氢性能研究

项目名称： 阵列式BiOCl/C60单晶面暴露自组装薄膜的制备与产氢性能研究

项目编号： No.51502187

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 孟则达

作者单位： 苏州科技大学

项目金额： 21万元

中文摘要： 晶面工程在半导体光催化技术中的应用，受到各国学者的广泛重视。半导体材料的各个晶面存在各相异性，进而体现出不同的光催化活性。一般的单晶面材料存在暴露比例低，其他晶面相互混杂，单晶面暴露率低等缺点。本课题通过制备C60涂膜材料作为敏化剂来解决BiOCl晶体在可见光下活性不足的问题，同时用电化学方法与种晶技术在薄膜上制备阵列式有序排列的纳米晶片。通过晶体阵列的紧密性控制单{001}晶面的暴露情况，使其暴露比例接近100%。通过调整晶面暴露情况，提高其光催化性能。在光催化机制中，晶面的相互作用是不可避免的，如何更好的控制高能晶面的暴露是提高光催化性能的有效途径之一。本项目的成功实施将有效的控制和暴露高能晶面，提高光催化性能，研制出高效率的可见光产氢薄膜，进行工业化生产，解决能源问题，具有重要的理论意义与实际应用，为进一步设计构筑高效的太阳能转化体系提供新策略。

中文关键词： 半导体薄膜材料；有机/无机复合半导体材料；富勒烯；氯氧化铋；单晶面

英文摘要： Surface properties are crucial to the physical and chemical performance of a single-crystalline material. Usually, different facets of a single-crystalline material possess different geometric and electronic structures, thus endowing them with distinctive properties. Recently, considerable attention has been paid to the facet-controlled fabrication of single-crystalline semiconductors with well-defined morphologies because of their facet-dependent photocatalytic, photoelectric, and other surface-related properties. Especially, surface properties are vital to a semiconductor’s photocatalytic performance, which sensitively depends on its exposed surfaces with distinct crystal facets. In this research, first we prepare the C60 film. And array BiOCl nanosheets self-assembled on C60 film. BiOCl single-crystalline nanosheets were prepared by the hydrothermal method and a novel electrochemical method composed of a catholic electrodeposition and an anodic oxidation at room temperature. Control the growth of BiOCl, in order to expose the single facets of BiOCl. The {001} facets percentage was controlled about 100%, by adjusting the density of BiOCl array. The influence of morphology, crystallology, particle size, optical property and photocatalytic activity was also studied by varying precursor concentrations, pH value and reaction temperature, et al. The key to this technology is exposing the single facets of BiOCl. Improve both high activity and good stability of photocatalysts for hydrogen production via water splitting.

英文关键词： semiconductor film;Organic/inorganic compound semiconductor materials;fullerene;BiOCl;single-crystalline