Synthesis of Ag/N-TiO<sub>2</sub>/SBA-15 Photocatalysts and Photocatalytic Reduction of CO<sub>2</sub>under Visible Light Irradiation

Gao, Mengyu; Jiang, Dong; Sun, Duixiong; Hou, Bo; Li, Debao

doi:10.6023/a14070535

Cited by 8 publications

(3 citation statements)

References 23 publications

(39 reference statements)

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“…So far, it has been demonstrated that the mesoporous TiO 2 , − N-doped Ta 2 O 5 , ZnGaNO, , ZnGa 2 O 4 , In(OH) 3 , CeO 2 , , Ti-MCM-48/Ti-MCM-48/Ti-containing nanoporous silica, ,− CeO 2 –TiO 2 composites and WO 3, can achieve high selectivity for the photoconversion of CO 2 into CH 4 , CO or CH 3 OH because of the large surface area, uniformly distributed pores and ordered channels enhancing CO 2 adsorption, activation and charge separation. Furthermore, various mesoporous materials as supports, such as SBA-15, − SiO 2 , ,− zeolites, and mesoporous molecular sieves, , have been widely coupled with semiconductors to avoid the unexpected agglomeration of semiconductor nanoparticles and increase their specific surface area for significantly boosted photocatalytic CO 2 -reduction performance. However, despite small micropores or mesopores that assure larger surface area and more active sites available for surface photocatalysis, they also have a negative effect on the gas diffusion .…”

Section: Fundamentals Of Heterogeneous Co2 Photoreductionmentioning

confidence: 99%

Cocatalysts for Selective Photoreduction of CO₂into Solar Fuels

et al. 2019

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Photoreduction of CO2 into sustainable and green solar fuels is generally believed to be an appealing solution to simultaneously overcome both environmental problems and energy crisis. The low selectivity of challenging multi-electron CO2 photoreduction reactions makes it one of the holy grails in heterogeneous photocatalysis. This Review highlights the important roles of cocatalysts in selective photocatalytic CO2 reduction into solar fuels using semiconductor catalysts. A special emphasis in this review is placed on the key role, design considerations and modification strategies of cocatalysts for CO2 photoreduction. Various cocatalysts, such as the biomimetic, metal-based, metal-free, and multifunctional ones, and their selectivity for CO2 photoreduction are summarized and discussed, along with the recent advances in this area. This Review provides useful information for the design of highly selective cocatalysts for photo(electro)reduction and electroreduction of CO2 and complements the existing reviews on various semiconductor photocatalysts.

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Section: Fundamentals Of Heterogeneous Co2 Photoreductionmentioning

confidence: 99%

Cocatalysts for Selective Photoreduction of CO₂into Solar Fuels

et al. 2019

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“…Only one article reports the application of nonmetal-doped mp-TiO2 in CO2 reduction [235]. Mengyu et al reported the synthesis of silver-loaded, nitrogen-doped TiO2/SBA-15 mesoporous catalysts through a solvothermal method using titanium n-butoxide, carboxylate-modified SBA-15, urea, and silver nitrate as TiO2 precursor, support, and nitrogen and Ag sources, respectively [235]. The mesoporous SBA-15 support was loaded with anatase N-TiO2 and Ag.…”

Section: Co 2 Reductionmentioning

confidence: 99%

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

et al. 2017

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Mesoporous titania (mp-TiO 2 ) has drawn tremendous attention for a diverse set of applications due to its high surface area, interfacial structure, and tunable combination of pore size, pore orientation, wall thickness, and pore connectivity. Its pore structure facilitates rapid diffusion of reactants and charge carriers to the photocatalytically active interface of TiO 2 . However, because the large band gap of TiO 2 limits its ability to utilize visible light, non-metal doping has been extensively studied to tune the energy levels of TiO 2 . While first-principles calculations support the efficacy of this approach, it is challenging to efficiently introduce active non-metal dopants into the lattice of TiO 2 . This review surveys recent advances in the preparation of mp-TiO 2 and their doping with non-metal atoms. Different doping strategies and dopant sources are discussed. Further, co-doping with combinations of non-metal dopants are discussed as strategies to reduce the band gap, improve photogenerated charge separation, and enhance visible light absorption. The improvements resulting from each doping strategy are discussed in light of potential changes in mesoporous architecture, dopant composition and chemical state, extent of band gap reduction, and improvement in photocatalytic activities. Finally, potential applications of non-metal-doped mp-TiO 2 are explored in water splitting, CO 2 reduction, and environmental remediation with visible light.

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“…The term "nano" has seen extensive use in the sciences and technologies developed in the 21st century [1][2][3][4][5]. Scientific research into nanomaterials and nanotechnology has increased rapidly in this period, and shows no signs of slowing down [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Compared to their bulk counterparts, nanomaterials often exhibit very different properties, such as surface effects, small size effects, quantum confinement effects, and show a series of unusual behaviors in terms of electronics, optics, magnetics, thermal conductivity, and more [21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional architectures constructed using two-dimensional nanosheets

Wang

2015

Sci. China Chem.

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Two-dimensional (2D) nanomaterials such as transition metal dichalcogenides (TMDs) and graphene have attracted extensive interest as emergent materials, owing to their excellent properties that favor their future use in electronic devices, catalysis, optics, and biological-or energy-relevant areas. However, 2D nanosheets tend to easily restack and condense, which weakens their performance in many of these applications. Assembling these 2D nanosheets as building blocks for three-dimensional (3D) architectures not only maintains the intrinsic performances of the 2D nanostructures but also synergistically makes use of the advantages of the 3D microstructures to improve the overall material properties. In this critical review, we will highlight recent developments of sundry 2D nanosheet-assembled 3D architectures, including their design, synthesis, and potential applications. Their controllable syntheses, novel structures, and potential applications will be systematically explained, analyzed, and summarized. In the end, we will offer some perspective on the challenges facing future advancement of this field.

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Synthesis of Ag/N-TiO₂/SBA-15 Photocatalysts and Photocatalytic Reduction of CO₂under Visible Light Irradiation

Cited by 8 publications

References 23 publications

Cocatalysts for Selective Photoreduction of CO₂into Solar Fuels

Cocatalysts for Selective Photoreduction of CO₂into Solar Fuels

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

Three-dimensional architectures constructed using two-dimensional nanosheets

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Synthesis of Ag/N-TiO2/SBA-15 Photocatalysts and Photocatalytic Reduction of CO2under Visible Light Irradiation

Cited by 8 publications

References 23 publications

Cocatalysts for Selective Photoreduction of CO2into Solar Fuels

Cocatalysts for Selective Photoreduction of CO2into Solar Fuels

Synthesis and Catalytic Applications of Non-Metal Doped Mesoporous Titania

Three-dimensional architectures constructed using two-dimensional nanosheets

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Product

Resources

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Synthesis of Ag/N-TiO₂/SBA-15 Photocatalysts and Photocatalytic Reduction of CO₂under Visible Light Irradiation

Cocatalysts for Selective Photoreduction of CO₂into Solar Fuels

Cocatalysts for Selective Photoreduction of CO₂into Solar Fuels