Bio-templated synthesis of hierarchically ordered macro-mesoporous anatase titanium dioxide flakes with high photocatalytic activity

Li, Bing; Zhao, Jianquan; Liu, Jing; Shen, Xinyu; Mo, Shaobo; Tong, Hua

doi:10.1039/c4ra13410a

Cited by 35 publications

(19 citation statements)

References 45 publications

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“…Since Fujishima and Honda first demonstrated that TiO 2 was a promising photo-anode for UV light-driven photocatalytic water splitting [34], which has been widely studied in many photocatalytic reactions due to its chemical stability, low cost, environmentally friendly nature, and tunable electronic energy band gap [143,144,145,146,147]. Figure 4 shows a band gap illustration of TiO 2 .…”

Section: Photocatalyst Materialsmentioning

confidence: 99%

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

et al. 2016

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Photocatalytic water splitting using sunlight is a promising technology capable of providing high energy yield without pollutant byproducts. Herein, we review various aspects of this technology including chemical reactions, physiochemical conditions and photocatalyst types such as metal oxides, sulfides, nitrides, nanocomposites, and doped materials followed by recent advances in computational modeling of photoactive materials. As the best-known catalyst for photocatalytic hydrogen and oxygen evolution, TiO 2 is discussed in a separate section, along with its challenges such as the wide band gap, large overpotential for hydrogen evolution, and rapid recombination of produced electron-hole pairs. Various approaches are addressed to overcome these shortcomings, such as doping with different elements, heterojunction catalysts, noble metal deposition, and surface modification. Development of a photocatalytic corrosion resistant, visible light absorbing, defect-tuned material with small particle size is the key to complete the sunlight to hydrogen cycle efficiently. Computational studies have opened new avenues to understand and predict the electronic density of states and band structure of advanced materials and could pave the way for the rational design of efficient photocatalysts for water splitting. Future directions are focused on developing innovative junction architectures, novel synthesis methods and optimizing the existing active materials to enhance charge transfer, visible light absorption, reducing the gas evolution overpotential and maintaining chemical and physical stability.

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Section: Photocatalyst Materialsmentioning

confidence: 99%

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

et al. 2016

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“…Besides, the size of the secondary pore can be fine-tuned from 0.9 to 4.8 nm by changing the crystallization temperature and Ti/Si ratio [ 57 , 58 ]. To better control the hierarchically porous structures, colloidal crystals constructed by SiO 2 or polymer nanospheres were introduced as the hard templates [ 59 , 60 ]. For example, Su and coworkers have synthesized ordered hierarchically mesoporous TiO 2 microparticles by using P(St-MMA-SPMAP) spheres and P123 as the hard and soft templates, respectively (Fig.…”

Section: Diverse Architecturesmentioning

confidence: 99%

Recent advances in the synthesis of hierarchically mesoporous TiO2 materials for energy and environmental applications

Zhang

Tian

et al. 2020

National Science Review

162

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Because of their low cost, natural abundance, environmental benignity, plentiful polymorphs, good chemical stability and excellent optical properties, TiO2 materials are of great importance in the areas of physics, chemistry and material science. Much effort has been devoted to the synthesis of TiO2 nanomaterials for various applications. Among them, mesoporous TiO2 materials, especially with hierarchically porous structures, show great potential owing to their extraordinarily high surface areas, large pore volumes, tunable pore structures and morphologies, and nanoscale effects. This review aims to provide an overview of the synthesis and applications of hierarchically mesoporous TiO2 materials. In the first section, the general synthetic strategies for hierarchically mesoporous TiO2 materials are reviewed. After that, we summarize the architectures of hierarchically mesoporous TiO2 materials, including nanofibers, nanosheets, microparticles, films, spheres, core-shell and multi-level structures. At the same time, the corresponding mechanisms and the key factors for the controllable synthesis are highlighted. Following this, the applications of hierarchically mesoporous TiO2 materials in terms of energy storage and environmental protection, including photocatalytic degradation of pollutants, photocatalytic fuel generation, photoelectrochemical water splitting, catalyst support, lithium-ion batteries and sodium-ion batteries, are discussed. Finally, we outline the challenges and future directions of research and development in this area.

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“…In addition to the improved charge transfer reaction, an enhanced light harvesting capability can be ensured due to the multireflection within interconnected open networks. Among the studied por-ous photocatalysts, nano/mesoporous systems have constituted the major part, but they are still deeply limited by the narrow pore sizes that are not effective for significant mass transport and access [27]. Making highly macroporous system seems a satisfactory solution of this aspect, especially when the issue on the significant loss of specific surface area (SSA) is well addressed.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

Chen

Jiang

et al. 2019

Science Bulletin

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Bio-templated synthesis of hierarchically ordered macro-mesoporous anatase titanium dioxide flakes with high photocatalytic activity

Abstract: Hierarchically ordered macro-mesoporous anatase TiO2 flakes were synthesized by using rose petals and P123 as dual templates with high photocatalytic activity.

Cited by 35 publications

References 45 publications

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

Photocatalytic Water Splitting—The Untamed Dream: A Review of Recent Advances

Recent advances in the synthesis of hierarchically mesoporous TiO2 materials for energy and environmental applications

Facile synthesis of bimodal macroporous g-C3N4/SnO2 nanohybrids with enhanced photocatalytic activity

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