Facile fabrication of g-C3N4/SnO2 composites and ball milling treatment for enhanced photocatalytic performance
Facile fabrication of g-C3N4/SnO2 composites and ball milling treatment for enhanced photocatalytic performance
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轻松制造 g-C3N4/SnO2 复合材料并进行球磨处理以增强光催化性能
DOI：
10.1016/j.jallcom.2019.06.193
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发表时间：
2019-09
影响因子：
6.2
通讯作者：
Li Zhenjiang
中科院分区：
文献类型：
--
作者：
Zhu Kaixing;Lv Yang;Liu Jing;Wang Wenjun;Wang Chunping;Li Songmei;Wang Peng;Zhang Meng;Meng Alan;Li Zhenjiang
采用水热法在g-C3 N4材料表面原位合成了粒径为2-4 nm的SnO 2纳米粒子。然后采用球磨法对所得g-C3 N4/SnO 2复合材料进行处理，以改善SnO 2纳米颗粒的分散性，并增强SnO 2与g-C3 N4之间的结合。光致发光光谱表明，球磨处理后，光生载流子的分离效率得到了提高。结果表明，球磨后的g-C3 N4/SnO 2复合材料对结晶紫的光催化降解性能明显提高，光降解效率分别比本体g-C3 N4和原位合成的g-C3 N4/SnO 2复合材料提高了5.06倍和3.23倍;这些改进是由于在复合材料的界面处有更多可用和可接近的电子传输位点。
Ultrafine SnO2nanoparticles (NPs) with diameters of 2–4 nm were in situ fabricated on the surfaces of g-C3N4material through a hydrothermal method. Ball milling was then applied to treat the obtained g-C3N4/SnO2composites in order to improve the dispersion of SnO2NPs as well as to strengthen the bonding between SnO2and g-C3N4. The enhanced separation efficiency of photogenerated carriers, as indicated by the photoluminescence spectrum, was achieved after the ball milling treatment. Consequently, the ball milled g-C3N4/SnO2composite demonstrated significantly improved photocatalytic performance when degrading crystal violet, as evidenced by photodegradation efficiency enhancements of 5.06 and 3.23 times, respectively, when compared with bulk g-C3N4and the in situ synthesized g-C3N4/SnO2composite; these improvements were due to more useable and accessible electronic transport sites at the interfaces of the composites.
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