Jia Yao, Liu Peibo, Wang Qingyao, Wu Yue, Cao Dandan, Qiao Qing-An
School of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
Library, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai 264025, China.
J Colloid Interface Sci. 2021 Mar;585:459-469. doi: 10.1016/j.jcis.2020.10.027. Epub 2020 Oct 13.
Novel energy material is the investigation focus to overcome the environment pollution and resource shortage crisis. TiO nanotube arrays (TiO NTA) could be used for pollutant decomposition, photoelectric conversion and H, CH generation. BiOBr nanosheets were fabricated on TiO NTA by a solvothermal deposition method, and then transformed into BiS nanosheets after the ion exchange reaction. The results revealed that the ion concentration significantly influenced the morphology, microstructure, optical harvesting and photoelectrochemical capacity of BiS-BiOBr/TiO NTA. The samples also exhibited high photocatalytic activity for the removal of dyes and Cr(VI), and the excellent photocurrent and photovoltage were obtained under visible light irradiation. The photocatalytic water splitting for hydrogen generation was carried out, and the photocatalytic hydrogen production rate achieved 17.26 μmol·cm·h. The photocatalyst showed the remarkable stability, and the photocatalytic ability still maintained high level after several repeated photocatalytic cycles. The photocatalytic data indicated that the BiS-BiOBr/TiO NTA photocatalyst provided a perfect strategy for the sensitizer deposition on TiO NTA and novel approach for the photocatalytic performance improvement.
新型能源材料是克服环境污染和资源短缺危机的研究重点。二氧化钛纳米管阵列（TiO NTA）可用于污染物分解、光电转换以及氢气、甲烷生成。通过溶剂热沉积法在TiO NTA上制备了溴氧化铋纳米片，然后经过离子交换反应将其转化为硫化铋纳米片。结果表明，离子浓度显著影响了BiS-BiOBr/TiO NTA的形貌、微观结构、光捕获能力和光电化学性能。该样品对染料和Cr(VI)的去除也表现出高光催化活性，并且在可见光照射下获得了优异的光电流和光电压。进行了光催化水分解制氢实验，光催化产氢速率达到17.26 μmol·cm·h。该光催化剂表现出显著的稳定性，经过多次重复光催化循环后，其光催化能力仍保持在较高水平。光催化数据表明，BiS-BiOBr/TiO NTA光催化剂为在TiO NTA上沉积敏化剂提供了一种完美策略，也是提高光催化性能的新方法。
