Preparation of three-dimensional inverse opal SnO<sub>2</sub>/graphene composite microspheres and their enhanced photocatalytic activities

Chen, Lechen; Xie, Lizhao; Wang, Mozhen; Ge, Xinlei

doi:10.1039/c4ta05898d

Cited by 54 publications

(12 citation statements)

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“…In another example, it was reported that the photocatalytic activity of GO–TiO 2 nanorod composite was much higher than that of GO–TiO 2 nanoparticle composite, due to the anti‐charge recombination and the more exposed (101) facets of TiO 2 nanorods . Moreover, other various nanostructured semiconductors such as 3D flower‐like, hierarchical macro‐mesoporous, inverse opal, and hollow microspheres have also been coupled with graphene to construct composite photocatalysts, all of which exhibited much higher photocatalytic activities due to their excellent morphological effect.…”

Section: Design Strategies Of Graphene‐based Composite Photocatalystsmentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

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In recent years, heterogeneous photocatalysis has received much research interest because of its powerful potential applications in tackling many important energy and environmental challenges at a global level in an economically sustainable manner. Due to their unique optical, electrical, and physicochemical properties, various 2D graphene nanosheets-supported semiconductor composite photocatalysts have been widely constructed and applied in different photocatalytic fields. In this review, fundamental mechanisms of heterogeneous photocatalysis, including thermodynamic and kinetics requirements, are first systematically summarized. Then, the photocatalysis-related properties of graphene and its derivatives, and design rules and synthesis methods of graphene-based composites are highlighted. Importantly, different design strategies, including doping and sensitization of semiconductors by graphene, improving electrical conductivity of graphene, increasing eloectrocatalytic active sites on graphene, strengthening interface coupling between semiconductors and graphene, fabricating micro/nano architectures, constructing multi-junction nanocomposites, enhancing photostability of semiconductors, and utilizing the synergistic effect of various modification strategies, are thoroughly summarized. The important applications including photocatalytic pollutant degradation, H production, and CO reduction are also addressed. Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.

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Section: Design Strategies Of Graphene‐based Composite Photocatalystsmentioning

confidence: 99%

Graphene in Photocatalysis: A Review

Wageh

et al. 2016

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927

401

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“…spherical photonic micro-particles) can be beneficial for many catalytic applications and is largely unexplored. 363,401,413 The control over metal NP size, distribution, and stability using a simple synthetic approach represents an additional challenge. Non-uniform distribution of functional particles can result in the formation of hot spots and compromise the uniform distribution of temperature and concentration profiles in the reactor channel.…”

Section: Perspectivementioning

confidence: 99%

A colloidoscope of colloid-based porous materials and their uses

et al. 2016

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Nature evolved a variety of hierarchical structures that produce sophisticated functions. Inspired by these natural materials, colloidal self-assembly provides a convenient way to produce structures from simple building blocks with a variety of complex functions beyond those found in nature. In particular, colloid-based porous materials (CBPM) can be made from a wide variety of materials. The internal structure of CBPM also has several key attributes, namely porosity on a sub-micrometer length scale, interconnectivity of these pores, and a controllable degree of order. The combination of structure and composition allow CBPM to attain properties important for modern applications such as photonic inks, colorimetric sensors, self-cleaning surfaces, water purification systems, or batteries. This review summarizes recent developments in the field of CBPM, including principles for their design, fabrication, and applications, with a particular focus on structural features and materials' properties that enable these applications. We begin with a short introduction to the wide variety of patterns that can be generated by colloidal self-assembly and templating processes. We then discuss different applications of such structures, focusing on optics, wetting, sensing, catalysis, and electrodes. Different fields of applications require different properties, yet the modularity of the assembly process of CBPM provides a high degree of tunability and tailorability in composition and structure. We examine the significance of properties such as structure, composition, and degree of order on the materials' functions and use, as well as trends in and future directions for the development of CBPM.

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“…From these points of view, carbon (graphene) compounds might One of the prerequisite aspects in the case of G/rGO-modified PCs is the loading amount of G/rGO, which is critical for the enhancement of photocatalytic activity, and thus an optimum amount of G/rGO loaded on PC results in the best performance. For example, the highest photodegradation of methyl orange has been achieved in the presence of photocatalyst containing 0.06 wt% rGO incorporated into SnO 2 IO, as compared to bare and modified SnO 2 IO containing larger content of rGO (0.15 and 0.82 wt%) [70]. This observation is valid for any materials/compounds loaded/deposited on the surface of PCs, e.g., noble metals, indicating the importance of optimum content of modifiers, since lower/higher content diminishes significantly the photocatalytic performances, due to various reasons, e.g., "screening effect" [75,76].…”

Section: Antimicrobial Properties Of Graphene-based Composite Photocatalystsmentioning

confidence: 99%

Novel Structures and Applications of Graphene-Based Semiconductor Photocatalysts: Faceted Particles, Photonic Crystals, Antimicrobial and Magnetic Properties

et al. 2021

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Graphene, graphene oxide, reduced graphene oxide and their composites with various compounds/materials have high potential for substantial impact as cheap photocatalysts, which is essential to meet the demands of global activity, offering the advantage of utilizing “green” solar energy. Accordingly, graphene-based materials might help to reduce reliance on fossil fuel supplies and facile remediation routes to achieve clean environment and pure water. This review presents recent developments of graphene-based semiconductor photocatalysts, including novel composites with faceted particles, photonic crystals, and nanotubes/nanowires, where the enhancement of activity mechanism is associated with a synergistic effect resulting from the presence of graphene structure. Moreover, antimicrobial potential (highly needed these days), and facile recovery/reuse of photocatalysts by magnetic field have been addresses as very important issue for future commercialization. It is believed that graphene materials should be available soon in the market, especially because of constantly decreasing prices of graphene, vis response, excellent charge transfer ability, and thus high and broad photocatalytic activity against both organic pollutants and microorganisms.

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Preparation of three-dimensional inverse opal SnO₂/graphene composite microspheres and their enhanced photocatalytic activities

Abstract: 3D inverse opal SnO2/graphene composite microspheres with enhanced photocatalytic activities were first prepared using polystyrene colloidal crystal balls as a template.

Cited by 54 publications

References 47 publications

Graphene in Photocatalysis: A Review

Graphene in Photocatalysis: A Review

A colloidoscope of colloid-based porous materials and their uses

Novel Structures and Applications of Graphene-Based Semiconductor Photocatalysts: Faceted Particles, Photonic Crystals, Antimicrobial and Magnetic Properties

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Preparation of three-dimensional inverse opal SnO2/graphene composite microspheres and their enhanced photocatalytic activities

Abstract: 3D inverse opal SnO2/graphene composite microspheres with enhanced photocatalytic activities were first prepared using polystyrene colloidal crystal balls as a template.

Cited by 54 publications

References 47 publications

Graphene in Photocatalysis: A Review

Graphene in Photocatalysis: A Review

A colloidoscope of colloid-based porous materials and their uses

Novel Structures and Applications of Graphene-Based Semiconductor Photocatalysts: Faceted Particles, Photonic Crystals, Antimicrobial and Magnetic Properties

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Preparation of three-dimensional inverse opal SnO₂/graphene composite microspheres and their enhanced photocatalytic activities