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Fabrication of a TiO2 trapped meso/macroporous g-C3N4 heterojunction photocatalyst and understanding its enhanced photocatalytic activity based on optical simulation analysis†
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1039/c7qi00751e
Wanbao Wu 1, 2, 3, 4, 5 , Xu Li 1, 2, 3, 4, 5 , Zhaohui Ruan 3, 4, 6, 7, 8 , Yudong Li 1, 2, 3, 4, 5 , Xianzhu Xu 1, 2, 3, 4, 5 , Yuan Yuan 3, 4, 6, 7, 8 , Kaifeng Lin 1, 2, 3, 4, 5
Affiliation  

A TiO2 trapped meso/macroporous g-C3N4 heterojunction (mm-CNT) photocatalyst is fabricated by hydrolysis and sintering of tetrabutyl titanate on meso/macroporous g-C3N4 prepared via a facile hard template method. TiO2 nanoparticles are highly dispersed and some of them are trapped in the pores of meso/macroporous g-C3N4. The photocatalytic performance of mm-CNT is assessed through degradation of Rhodamine B solution under visible light irradiation, which displays much better photocatalytic performance than that over pristine meso/macroporous g-C3N4 and pristine g-C3N4. Based on the characterization results, it is reasonable to believe that the enhanced photocatalytic activity should be attributed to the unique meso/macroporous architecture and heterojunction structure, which results in improved mass transfer and enhances the separation efficiency of exciton dissociation. Besides, an optical simulation is initially utilized to study the optical absorption characteristics of mm-CNT since the optical absorption ability of a photocatalyst is one of the most important aspects influencing the photocatalytic ability. As a result, the enhanced ability of light absorption observed on the heterojunctions should be also favorable to achieve improved photocatalytic performances. On account of the analysis results, a possible photocatalytic mechanism for enhanced visible light photocatalytic activity is proposed.

中文翻译:

TiO 2捕获的介孔/大分子gC 3 N 4异质结光催化剂的制备,并基于光学模拟分析了解其增强的光催化活性

甲的TiO 2捕集的内消旋/大孔GC 3 Ñ 4异质结(毫米-CNT)光催化剂通过水解制造和钛酸四丁酯的上内消旋/大孔GC烧结3 Ñ 4制备通过一种容易硬模板方法。TiO 2纳米颗粒高度分散,其中一些被捕获在介孔/大分子gC 3 N 4的孔中。通过在可见光照射下若丹明B溶液的降解来评估mm-CNT的光催化性能,该溶液的光催化性能比原始的中/大分子gC 3 N 4更好。和原始gC 3 N 4。根据表征结果,可以合理地认为,增强的光催化活性应归因于独特的介观/大分子结构和异质结结构,从而改善了质量传递并提高了激子离解的分离效率。此外,由于光催化剂的光吸收能力是影响光催化能力的最重要方面之一,因此最初利用光学模拟来研究mm-CNT的光吸收特性。结果,在异质结上观察到的增强的光吸收能力也应该有利于实现改善的光催化性能。根据分析结果,提出了可能的增强可见光光催化活性的光催化机理。
更新日期:2017-12-19
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