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Sulfur-Doped g-C3N4 and BiPO4 Nanorod Hybrid Architectures for Enhanced Photocatalytic Hydrogen Evolution under Visible Light Irradiation
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-17 00:00:00 , DOI: 10.1021/acsaem.0c00555 Dan Long 1 , Zhiqian Chen 1 , Xi Rao 1 , Yongping Zhang 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-17 00:00:00 , DOI: 10.1021/acsaem.0c00555 Dan Long 1 , Zhiqian Chen 1 , Xi Rao 1 , Yongping Zhang 1
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We proposed a pathway to enhance the photocatalytic H2 evolution activity of g-C3N4 through the synergistic effect of upshifting the conduction band (CB) minimum and facilitating the separation rate of photoinduced electron–hole pairs. The S-doped g-C3N4 and BiPO4 nanorod hybrid composites were prepared by calcining the mixture of urea with 2-thiobarbituric acid and BiPO4 nanorods at elevated temperatures. The BiPO4/S-CN heterojunction exhibits an enhanced separation efficiency of photoinduced carriers by forming the interface of BiPO4 and g-C3N4; meanwhile, S doping upshifts the CB minimum of g-C3N4. The 0.1% BiPO4/S-CN composite (10 mg) exhibits an excellent hydrogen evolution rate of 11.7 μmol/h, which is 7.3 times that of g-C3N4 and 3.6 times that of S-CN. The enhanced photocatalytic activity of the BiPO4/S-CN composite is ascribed to the efficient separation due to the carrier migration from the CB of g-C3N4 to the CB of BiPO4, and a more negative conduction band of S-CN due to element doping.
中文翻译：
可见光照射下硫掺杂的gC 3 N 4和BiPO 4纳米棒混合体系结构，用于增强光催化氢的释放
我们提出了通过提高导带（CB）最小值和促进光致电子-空穴对的分离率的协同效应来增强gC 3 N 4的光催化H 2演化活性的途径。通过在高温下煅烧尿素与2-硫代巴比妥酸和BiPO 4纳米棒的混合物来制备S掺杂的gC 3 N 4和BiPO 4纳米棒杂化复合材料。通过形成BiPO 4和gC 3 N 4的界面，BiPO 4 / S-CN异质结表现出增强的光诱导载流子分离效率; 同时，S掺杂使gC 3 N 4的CB最小值上移。0.1％BiPO 4 / S-CN复合材料（10毫克）表现出出色的析氢速率11.7μmol / h，是gC 3 N 4的7.3倍和S-CN的3.6倍。由于载流子从gC 3 N 4的CB迁移到BiPO 4的CB ，以及S-CN的负导电带增多，BiPO 4 / S-CN复合材料的光催化活性增强归因于有效分离。元素掺杂。
更新日期：2020-04-17
中文翻译：
可见光照射下硫掺杂的gC 3 N 4和BiPO 4纳米棒混合体系结构，用于增强光催化氢的释放
我们提出了通过提高导带（CB）最小值和促进光致电子-空穴对的分离率的协同效应来增强gC 3 N 4的光催化H 2演化活性的途径。通过在高温下煅烧尿素与2-硫代巴比妥酸和BiPO 4纳米棒的混合物来制备S掺杂的gC 3 N 4和BiPO 4纳米棒杂化复合材料。通过形成BiPO 4和gC 3 N 4的界面，BiPO 4 / S-CN异质结表现出增强的光诱导载流子分离效率; 同时，S掺杂使gC 3 N 4的CB最小值上移。0.1％BiPO 4 / S-CN复合材料（10毫克）表现出出色的析氢速率11.7μmol / h，是gC 3 N 4的7.3倍和S-CN的3.6倍。由于载流子从gC 3 N 4的CB迁移到BiPO 4的CB ，以及S-CN的负导电带增多，BiPO 4 / S-CN复合材料的光催化活性增强归因于有效分离。元素掺杂。
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