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Hydrothermal synthesis of Bi2WO6 with a new tungsten source and enhanced photocatalytic activity of Bi2WO6 hybridized with C3N4†
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2018-06-15 00:00:00 , DOI: 10.1039/c8pp00078f Peipei Yan 1, 2, 3, 4 , Di Li 1, 2, 3, 4 , Xinguo Ma 4, 5, 6, 7 , Juanqin Xue 1, 2, 3, 4 , Yujie Zhang 1, 2, 3, 4 , Manbo Liu 1, 2, 3, 4
Photochemical & Photobiological Sciences ( IF 2.7 ) Pub Date : 2018-06-15 00:00:00 , DOI: 10.1039/c8pp00078f Peipei Yan 1, 2, 3, 4 , Di Li 1, 2, 3, 4 , Xinguo Ma 4, 5, 6, 7 , Juanqin Xue 1, 2, 3, 4 , Yujie Zhang 1, 2, 3, 4 , Manbo Liu 1, 2, 3, 4
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Bi2WO6 nanosheets were synthesized by a hydrothermal method with H2WO4 for the first time. The band structure of Bi2WO6 was investigated on the basis of density functional theory calculations. Bi2WO6 photocatalysts showed photocatalytic activity for the degradation of methylene blue under visible light irradiation. Kinetic studies using radical scavenger technologies suggested that holes were the dominant photo-oxidants. After hybridization with C3N4, the photocatalytic activity of Bi2WO6 was obviously enhanced. The enhanced photocatalytic activity of the C3N4/Bi2WO6 photocatalysts could be attributed to the effective separation of photogenerated e−/h+ pairs. The photogenerated holes on the valence band of Bi2WO6 can transfer to the highest occupied molecular orbital of C3N4via the well-developed interface, causing a reduction in the probability of e−/h+ recombination; consequently, large numbers of photogenerated holes led to the enhancement of the photocatalytic activity.
中文翻译：
用新的钨源 水热合成Bi 2 WO 6并增强与C 3 N 4 †杂交的Bi 2 WO 6的光催化活性
Bi 2 WO 6纳米片通过水热法首次与H 2 WO 4合成。在密度泛函理论计算的基础上，研究了Bi 2 WO 6的能带结构。Bi 2 WO 6光催化剂在可见光照射下表现出对亚甲基蓝降解的光催化活性。使用自由基清除剂技术的动力学研究表明，空穴是主要的光氧化剂。与C 3 N 4杂交后，Bi 2 WO 6的光催化活性明显得到了增强。的C的增强的光催化活性3 Ñ 4 /铋2 WO 6的光催化剂可以归因于光生e的有效分离- / H +对。关于Bi的价带中的光生空穴2 WO 6可以转移到的最高占据分子轨道的C 3 Ñ 4经由发达的界面，从而导致在e的概率的降低- / H +重组; 因此，大量的光生空穴导致光催化活性的增强。
更新日期：2018-06-15
中文翻译：
用新的钨源 水热合成Bi 2 WO 6并增强与C 3 N 4 †杂交的Bi 2 WO 6的光催化活性
Bi 2 WO 6纳米片通过水热法首次与H 2 WO 4合成。在密度泛函理论计算的基础上，研究了Bi 2 WO 6的能带结构。Bi 2 WO 6光催化剂在可见光照射下表现出对亚甲基蓝降解的光催化活性。使用自由基清除剂技术的动力学研究表明，空穴是主要的光氧化剂。与C 3 N 4杂交后，Bi 2 WO 6的光催化活性明显得到了增强。的C的增强的光催化活性3 Ñ 4 /铋2 WO 6的光催化剂可以归因于光生e的有效分离- / H +对。关于Bi的价带中的光生空穴2 WO 6可以转移到的最高占据分子轨道的C 3 Ñ 4经由发达的界面，从而导致在e的概率的降低- / H +重组; 因此，大量的光生空穴导致光催化活性的增强。
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