祝贺我组博士研究生史浪同学的研究论文被Journal of Hazardous Materials 接收
发布时间：2020-04-25
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Rationally designed MoS2/protonated g-C3N4 nanosheet composite as photocatalyst with excellent synergistic effect toward photocatalytic degradation
The positively charged ultrathin g-C3N4 nanosheets was obtainedby ultrasonic-assisted exfoliation of protonated g-C3N4. Compared with protonated g-C3N4 and exfoliated g-C3N4, the positively charged ultrathin g-C3N4 with abundant functional groups as well as desired dispersibility in deionized water, thus it could serve as a basic building block for design of related heterojunction composites. To take full advantage of these features, positively charged ultrathin g-C3N4/MoS2 composites were fabricated through a simple electrostatic adsorption process followed by a hydrothermal method using (NH4)2MoS4 as the reactants. By loading a small amount of MoS2, the as-fabricated composites exhibit considerable improvement on the photocatalytic activities under visible light irradiation. The composite containing 2 wt% MoS2 shows the highest photodegradation efficiency of about 96.5% within 30 min, which is about 3.5 times of the positively charged ultrathin g-C3N4 and 8 times of the bulk g-C3N4, respectively. The superb photocatalytic performance benefits from the unique advantages, including richly available reaction sites, aligned energy levels, and efficient electron transfer. This work demonstrated that the rational construction of g-C3N4/MoS2 composites is an efficiency way to degrade pollutants under visible light.