Fabrication of g-C3N4/PW12/TiO2 composite with significantly enhanced photocatalytic performance under visible light
Fabrication of g-C3N4/PW12/TiO2 composite with significantly enhanced photocatalytic performance under visible light
复制标题
可见光下光催化性能显着增强的g-C3N4/PW12/TiO2复合材料的制备
DOI：
10.1016/j.jallcom.2020.157924
复制
发表时间：
2020-11
影响因子：
6.2
通讯作者：
Yangguang Li
中科院分区：
文献类型：
--
作者：
Feihong Shi;Tingting Zhao;Jiabo Wang;Yueting Wang;Zhe Chen;Baolei Liu;Haifeng Ji;Weidong Wang;Gunglei Zhang;Yangguang Li
探索和开发高效、持久的可见光环境修复催化剂是当前最具挑战性的课题之一。在此基础上，采用静电纺丝/煅烧技术制备了g-C3N4/PW12/TiO2（CN/PT-X; X = 3.2, 6和9）复合光催化剂。在复合材料中，g- c3n4生长在PW12/ tio2纳米纤维上形成三维纳米纤维网络，在制备过程中通过调节尿素与PW12/ tio2的质量比来控制g- c3n4的质量。x射线光电子能谱（XPS）结果证实了g- c3n4与PW12/TiO2之间的界面相互作用，表明两者之间形成了异质结。光催化实验表明，在可见光（λ > ~ 420 nm）照射下，CN/PT复合材料对四环素（TC）、双酚A （BPA）和还原Cr（VI）具有显著稳定的光催化性能。此外，CN/PT-6样品表现出最佳的催化活性，速率常数分别为0.03443 min−1（TC）、0.00712 min−1（BPA）和0.025 min−1（Cr(VI)）。这种性能的增强可归因于可见光区的吸附增强、高比表面积和光致载流子的有效分离和转移。活性物种捕获试验和ESR测量验证了h+和·O2−对TC降解负责。基于带隙结构和自由基捕获测试，提出并讨论了光催化行为的机理。
The exploration and development of supernally effective and persistent visible-light-responsive catalysts for environment remediation is regarded as one of the most challenging topics at present. Herein, a new g-C3N4/PW12/TiO2(CN/PT-X; X = 3.2, 6 and 9) composite photocatalyst was fabricated through a convenient electrospinning/calcination technique, followed with thermal polymerization method. In the composite, the g-C3N4was grown on PW12/TiO2nanofibers forming 3D nanofibrous networks, in which the g-C3N4quality was simply operated by regulating quality ratios of urea to PW12/TiO2during preparation process. The X-ray photoelectron spectra (XPS) results confirmed the interfacial interaction between g-C3N4and PW12/TiO2, implying the heterojunction formation between the two components. The photocatalytic tests showed that the CN/PT composites exhibited remarkable and stable photocatalytic performance for removing tetracycline (TC), bisphenol A (BPA) and reduction of Cr(VI) with visible-light (λ > 420 nm) irradiation. Furthermore, the CN/PT-6 sample displayed the optimal catalytic activity with the rate constants of 0.03443 min−1(TC), 0.00712 min−1(BPA) and 0.025 min−1(Cr(VI)), respectively. The enhanced performance could be ascribed to the enhanced adsorption in visible-light region, high specific surface area, effective separation and transfer of photoinduced charge carriers. The active species capturing tests and ESR measurements verified that h+and ·O2−were answerable for TC degradation. The mechanism accounting for the observed photocatalytic behaviour was proposed and discussed based on the band gap structure and free radicals capture tests.
登录
查看更多内容
影响因子：
3.3
作者：
Li, Lanjie;Li, Lin;Yan, Jinghui
通讯作者：
Yan, Jinghui
H3PW12O40/TiO2 和 Ag/H3PW12O40/TiO2 覆膜光纤光反应器设计用于模拟太阳光照射下降解水性罗丹明 B 和 4-硝基苯酚
影响因子：
15.1
作者：
Wan Guo;Yuxin Yang;Yihang Guo;Mingxin Huo
通讯作者：
Mingxin Huo
通过将等离子体 Pt 嵌入 TiO2/H3PW12O40 纳米孔中，增强太阳能光催化活性，同时降解和解毒多种氯酚
影响因子：
6.7
作者：
Guan Jiunian;Li Lu;Chen Chaohuang;Lu Ping;Yan Yu;Wang Zirui;Lu Nan;Huo Mingxin
通讯作者：
Huo Mingxin
等离子体光催化复合材料中的能量转移
DOI：
10.1038/lsa.2016.17
发表时间：
2016-02
期刊：
Light, science & applications
影响因子：
--
作者：
Ma XC;Dai Y;Yu L;Huang BB
通讯作者：
Huang BB
影响因子：
4.6
作者：
Satyabrata Subudhi;Sriram Mansingh;G. Swain;Arjun Behera;Dharitri Rath;K. Parida
通讯作者：
Satyabrata Subudhi;Sriram Mansingh;G. Swain;Arjun Behera;Dharitri Rath;K. Parida