Facile synthesis of tunable carbon modified mesoporous TiO2 for visible light photocatalytic application
Facile synthesis of tunable carbon modified mesoporous TiO2 for visible light photocatalytic application
复制标题
用于可见光光催化应用的可调碳修饰介孔TiO2的简便合成
DOI：
10.1016/j.apsusc.2017.03.283
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发表时间：
2017
影响因子：
6.7
通讯作者：
Jiang Wen-Feng
中科院分区：
文献类型：
--
作者：
Wei Xiao-Na;Wang Hui-Long;Wang Xin-Kui;Jiang Wen-Feng
本文采用原位碳化法、水热反应法和后煅烧法相结合的方法制备了碳改性介孔TiO2光催化剂。所合成的碳改性介孔TiO2粉体结晶度高、比表面积大、可见光响应性好。碳物种是由聚丙烯酸酯（PAA）的碳化形成的。碳酸盐的存在下，随后证实了XPS光谱，显着缩小了二氧化钛的带隙。以聚丙烯酸酯中的有机基团为碳源，原位碳化处理生成的碳有助于抑制TiO2晶粒的过度生长，增大TiO2的孔结构。通过调节后处理温度，可以有效地调节碳物种的数量，部分碳物种去除后，光催化剂的表面积进一步增大。碳改性介孔TiO2粉体在可见光照射下表现出良好的光催化性能和重现性。
In this paper, we describe a simple and novel approach for preparing tunable carbon-modified mesoporous TiO2photocatalysts by combining the in-situ carbonization of PAA-Ti/TiO2, hydrothermal reaction process and post-calcination treatment. The synthesized carbon-modified mesoporous TiO2powders were of high crystallinity, large specific surface area and good visible light response. The carbon species were formed by the carbonization of polyacrylate (PAA). The presence of carbonates was subsequently confirmed by the XPS spectra, which significantly narrow down the band gap of TiO2. The organic group in polyacrylate served as the carbon source and carbon resulted from in-situ carbonization treatment could help to inhibit the excessive growth of TiO2grain and enlarge the pore structure of TiO2. The amount of carbon species could be feasibly modulated by adjusting the post-calcination temperature and the surface area of the photocatalyst was enlarged further after the partial removal of carbon species. The carbon-modified mesoporous TiO2powders exhibit excellent reproducibility and photocatalytic performance under visible light irradiation.