Liang Zhi-Yu, Chen Feng, Huang Ren-Kun, Huang Wang-Jun, Wang Ying, Liang Ruo-Wen, Yan Gui-Yang
Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, China.
Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University, Ningde 352100, China.
Molecules. 2022 Aug 25;27(17):5438. doi: 10.3390/molecules27175438.
Modulating the transport route of photogenerated carriers on hollow cadmium sulfide without changing its intrinsic structure remains fascinating and challenging. In this work, a series of well-defined heterogeneous hollow structural materials consisting of CdS hollow nanocubes (CdS NCs) and graphitic CN nanoparticles (CN NPs) were strategically designed and fabricated according to an electrostatic interaction approach. It was found that such CN NPs/CdS NCs still retained the hollow structure after CN NP adorning and demonstrated versatile and remarkably boosted photoreduction performance. Specifically, under visible light irradiation (λ ≥ 420 nm), the hydrogenation ratio over 2CN NPs/CdS NCs (the mass ratio of CN NPs to CdS NCs is controlled to be 2%) toward nitrobenzene, -nitroaniline, -nitrotoluene, -nitrophenol, and -nitrochlorobenzene can be increased to 100%, 99.9%, 83.2%, 93.6%, and 98.2%, respectively. In addition, based on the results of photoelectrochemical performances, the 2CN NPs/CdS NCs reach a 0.46% applied bias photo-to-current efficiency, indicating that the combination with CN NPs can indeed improve the migration and motion behavior of photogenerated carriers, besides ameliorating the photocorrosion and prolonging the lifetime of CdS NCs.
在不改变硫化镉本征结构的情况下调控光生载流子的传输路径仍然是一个引人入胜且具有挑战性的课题。在这项工作中，通过静电相互作用方法，策略性地设计并制备了一系列由硫化镉空心纳米立方体（CdS NCs）和石墨化碳氮纳米颗粒（CN NPs）组成的结构明确的异质空心结构材料。研究发现，在修饰CN NPs后，此类CN NPs/CdS NCs仍保留空心结构，并展现出多样且显著增强的光还原性能。具体而言，在可见光照射（λ≥420 nm）下，2CN NPs/CdS NCs（CN NPs与CdS NCs的质量比控制为2%）对硝基苯、对硝基苯胺、对硝基甲苯、对硝基苯酚和对硝基氯苯的氢化率分别可提高到100%、99.9%、83.2%、93.6%和98.2%。此外，基于光电化学性能结果，2CN NPs/CdS NCs的外加偏压光电流效率达到0.46%，这表明与CN NPs结合除了能改善CdS NCs的光腐蚀并延长其寿命外，确实可以改善光生载流子的迁移和运动行为。
