Synthesis of novel MoS 2 /g-C 3 N 4 nanocomposites for enhanced photocatalytic activity
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Synthesis of novel MoS2/g-C3N4 nanocomposites for enhanced photocatalytic activity Zhen Wei1 · Xiaoning Shen1 · Yongfeng Ji1 · Zhichao Yang1 · Tong Wang1 · Shu Li1 · Menghan Zhu2 · Ye Tian2 Received: 3 December 2019 / Accepted: 1 August 2020 / Published online: 14 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract So far, the synthesis of high-activity and low-cost photocatalysts remains a huge challenge. 3D flower-like MoS2/g-C3N4 hybrids were synthesized by a very simple method. All of them were characterized by various characterizations to determine the composition, morphology, and properties of the compounds. There are many sites with large specific surface area catalytic activity in this structure. These composites are all photocatalytic degradable organic dyes, and the photocatalytic properties of the flower-like 4% MoS2/g-C3N4 are the best. The stability and recyclability of the 4% MoS2/g-C3N4 photocatalyst are also excellent. The 4% MoS2/g-C3N4 can also have photocatalytic ability to produce hydrogen. 50 mg of 4% MoS2/g-C3N4 photocatalyst can produce about 156 umol of hydrogen with visible light irradiation for about 4 h. Rate of hydrogen production is about 780 µmol h − 1 g − 1. In view of the good photocatalytic performance of the catalyst, we have discussed the mechanism both photocatalytic degradation of organic harmful pollutants and photocatalytic hydrogen production.
1 Introduction Human beings are facing more and more problems and the situations are getting more and more serious. Among them, solving organic pollutants in water and developing new energy sources are two of the most pressing issues. Visible light driven semiconductor photocatalytic technology has shown good application prospect in environmental management and energy conversion [1–3]. The semiconductor photocatalytic hydrogen production has some advantages of simple operation, low cost, environmental friendliness, energy-rich solar energy as energy source, and can be carried out at room temperature, and has been widely concerned by researchers at home and abroad, and has achieved unprecedented rapid development [4–7]. Economic and effective hydrogen production technology has become necessary. If a photocatalyst can be found to solve both water pollution and photocatalytic decompose water to produce hydrogen, it is a great boon for humans. Nowadays, more and more semiconductor materials were widely used in the field of * Ye Tian [email protected] 1
Department of Chemistry, College of Science, Hebei North University, Zhangjiakou 075000, China
Department of Physics, College of Science, Hebei North University, Zhangjiakou 075000, China
2
photocatalysis, catalysts such as, T iO2, ZnO, are typical representatives [6, 8–13]. However, these semiconductors are faced with disadvantages, like energy bandwidth, no absorption under visible light, etc. It means that these catalysts can’t be largely deployed in practical applications. As a unique semiconductor band structure as well as thermal
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