In situ growth of sulfide/g-C3N4 nano-heterostructures with an adjusted band gap toward enhanced visible photocatalysis

文献情報

出版日 2016-10-19

DOI 10.1039/C6CP06371C

インパクトファクター 3.676

著者

Yumeng Liu, Xiao Zhang, Junpeng Wang, Ping Yang

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要旨

In this study, the nano-heterostructures of Zn1−xCdxS (0 < x < 1) nanoparticles and small g-C3N4 nanosheets (Zn1−xCdxS/CN) were prepared via in situ growth. Bulk g-C3N4 was first delaminated into thin layers by an acid and alkali assisted ultrasound method. Zn1−xCdxS nanoparticles were deposited on the surface of small g-C3N4 nanosheets in situ to fabricate Zn1−xCdxS/CN photocatalysts. The absorption band edges of the as-prepared Zn1−xCdxS/CN composites shifted to a longer wavelength region compared to g-C3N4. The Zn1−xCdxS/CN heterojunctions revealed super-enhanced visible-light photocatalytic activities compared to pure g-C3N4 and Zn1−xCdxS nanoparticles. To investigate the composition dependence, the mass ratios of Zn1−xCdxS and g-C3N4 were adjusted. Zn0.8Cd0.2S nanoparticles (5 wt%) grown in situ on g-C3N4 nanosheets as sample 5-Zn0.8Cd0.2S/CN revealed a very high photocatalytic activity compared to other Zn0.8Cd0.2S/CN and CdS/CN samples where the degradation of RhB was up to 99% within 15 min under visible light irradiation. This was ascribed to the well-matched band gap structure, large specific surface area and intimately contacted interfaces. The controllable band gap of the Zn1−xCdxS/CN composites was a key factor for their enhanced photocatalytic performance. In addition, O2− was the leading reactive oxidative species in this photocatalytic process in the 5-Zn0.8Cd0.2S/CN composite system.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.