In situself-assembly fabrication of ultrathin sheet-like CuS modified g-C3N4heterojunction and its enhanced visible-light photocatalytic performance

Photocatalysts with heterojunction structure have been widely used for organic degradation. In this study, CuS/g-C₃N₄heterojunction was formed byin situself-assembly via a simply hydrothermal method. A series of characterizations were applied to analyzing the morphology, structure, optical properties and photo-induced electron transfer of the samples. The effect of CuS mass ratio in the CuS/g-C₃N₄composite on methyl blue (10 mg l^-1) degradation under visible-light illumination was discussed. When CuS mass ratio was 60%, CuS/g-C₃N₄behaved the highest photocatalytic efficiency which is 17 times higher than that of pure g-C₃N₄, and the optimal heterojunction exhibited promising photocatalytic stability as well. The synthesized CuS/g-C₃N₄with intimate contact and promising photocatalytic performance provides important implications on analogous researches on g-C₃N₄-based heterojunctions for photocatalytic applications.

Tailoring Structure: Current Design Strategies and Emerging Trends to Hierarchical Catalysts

Nature mimicking implies the design of nanostructured materials, which can be assembled into a hierarchical structure, thus outperforming the features of the neat components because of their multiple length scale organization. This approach can be effectively exploited for the design of advanced photocatalysts with superior catalytic activity for energy and environment applications with considerable development in the recent six years. In this context, we propose a review on the state of the art for hierarchical photocatalyst production. Particularly, different synthesis strategies are presented, including template-free structuring, and organic, inorganic, and hybrid templating. Furthermore, emerging approaches based on hybrid and bio-waste templating are also highlighted. Finally, a critical comparison among available methods is carried out based on the envisaged application.

Anchoring ZnIn2S4 nanosheets on ZSM-5 for boosting photocatalytic Cr(vi) reduction

ZSM-5@ZnIn2S4 is constructed for highly efficient photocatalytic Cr(vi) reduction.

In situ fabrication of a novel CdS/ZnIn2S4/g-C3N4 ternary heterojunction with enhanced visible-light photocatalytic performance

In this study, a novel g-C₃N₄-based ternary heterojunction was rationally designed and constructed by the in situ growth of ZnIn₂S₄ nanosheets and CdS nanoparticles onto the g-C₃N₄ nanosheets using a facile two-step oil-bath method. Through optimizing the proportion of ZnIn₂S₄ and CdS component, g-C₃N₄ nanosheets coupled with ZnIn₂S₄ nanosheets and CdS nanoparticles (denoted as CdS/ZnIn₂S₄/g-C₃N₄) exhibited obviously higher photocatalytic properties for RhB removal than the single-component and dual-component systems. Among the as-obtained ternary photocatalysts, it was found that the ternary CdS/ZnIn₂S₄/g-C₃N₄-0.2 photocatalyst displayed the optimum photocatalytic property (96%) within a short time (30 min), which was almost 27.42 and 1.17 times higher than that of pure g-C₃N₄ and binary ZnIn₂S₄/g-C₃N₄-0.7 composite. The excellent activity of the ternary CdS/ZnIn₂S₄/g-C₃N₄ heterostructure is assigned to the synergetic effects of CdS nanoparticles, ZnIn₂S₄ nanosheets and g-C₃N₄ nanosheets, which not only broaden the visible-light absorption range, but also improve the charge mobility and separation rate, thus boosting the visible-light-driven photocatalytic property of g-C₃N₄.

A novel ternary photocatalyst CdS/ZnIn₂S₄/g-C₃N₄ was designed and constructed by a calcination and two-step in situ deposition method with high-efficiency visible-light photocatalytic performance.