Carbon wrapped and doped TiO 2 mesoporous nanostructure with efficient visible-light photocatalysis for NO removal

He, Di; Liu, Yongli; Wang, inshu; Wu, Junshu; Yang, Yilong; An, Qier

doi:10.1016/j.apsusc.2016.06.186

Cited by 74 publications

(22 citation statements)

References 68 publications

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“…These photos show the surfaces of TiO 2 nanocrystals, where the disordered outer layer surrounding a crystalline core can be clearly observed with a faint contrast. Particles conglomerates of carbon-coated CD-aTiO 2 have been obtained using other synthetic methods [ 18 , 22 , 26 ]. In these work, the role of carbon is used to explain the amorphous structure of CD-aTiO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…In this context, carbon doping has aroused some research interest since this element can be incorporated to the lattice in different ways: as an anion (substituting the oxygen atom [ 14 ]), as a cation occupying interstitial sites, or even substituting titanium atoms [ 15 ]. It can also be integrated in a composite TiO 2 -based catalyst as a thin layer [ 16 , 17 , 18 ] or decorating the surface of the oxide material [ 19 ]. Regarding the synthetic feasibility, carbon doping can be carried out “in situ” in a one-pot reaction without using an external carbon precursor [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

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An Easy-Made, Economical and Efficient Carbon-Doped Amorphous TiO2 Photocatalyst Obtained by Microwave Assisted Synthesis for the Degradation of Rhodamine B

et al. 2017

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The search for novel materials and the development of improved processes for water purification have attracted the interest of researchers worldwide and the use of titanium dioxide in photocatalytic processes for the degradation of organic pollutants contained in water has been one of the benchmarks. Compared to crystalline titanium dioxide (cTiO2), the amorphous material has the advantages of having a higher adsorption capacity and being easier to dope with metal and non-metal elements. In this work, we take advantage of these two features to improve its photocatalytic properties in the degradation of Rhodamine B. The structural characterization by XRD analysis gives evidence of its amorphous nature and the SEM micrographs portray the disc morphology of 300 nm in diameter with heterogeneous grain boundaries. The degradation of Rhodamine B tests with the amorphous TiO2 using visible light confirm its improved catalytic activity compared to that of a commercial product, Degussa P25, which is a well-known crystalline material.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Easy-Made, Economical and Efficient Carbon-Doped Amorphous TiO2 Photocatalyst Obtained by Microwave Assisted Synthesis for the Degradation of Rhodamine B

et al. 2017

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“…In addition, two chemical bonds of B-O-Ti and B-O-B are formed during the doping process, and these two chemical bonds not only provide stable performance but also function as traps of photogenerated electrons. He et al [318] synthesized a C-doped TiO 2 photocatalyst by the hydrothermal method. As a carbon source, chitosan forms a porous morphology of the composite TiO 2 , and a Ti-C chemical bond in the complex that promotes formation of surface oxygen vacancies.…”

Section: Non-metal Ion Dopingmentioning

confidence: 99%

Recent Advances and Applications of Semiconductor Photocatalytic Technology

et al. 2019

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Along with the development of industry and the improvement of people’s living standards, peoples’ demand on resources has greatly increased, causing energy crises and environmental pollution. In recent years, photocatalytic technology has shown great potential as a low-cost, environmentally-friendly, and sustainable technology, and it has become a hot research topic. However, current photocatalytic technology cannot meet industrial requirements. The biggest challenge in the industrialization of photocatalyst technology is the development of an ideal photocatalyst, which should possess four features, including a high photocatalytic efficiency, a large specific surface area, a full utilization of sunlight, and recyclability. In this review, starting from the photocatalytic reaction mechanism and the preparation of the photocatalyst, we review the classification of current photocatalysts and the methods for improving photocatalytic performance; we also further discuss the potential industrial usage of photocatalytic technology. This review also aims to provide basic and comprehensive information on the industrialization of photocatalysis technology.

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“…Duan et al [111] found that a small amount of Ag nanoclusters supported on TiO 2 was beneficial to improve photocatalytic activity. He et al [112] synthesized carbon-encapsulated nanocrystalline TiO 2 catalyst, which achieved 71% NO conversion under visible light. Yuan et al [113] prepared TiO 2 aluminosilicate fiber nanocatalyst for photocatalytic removal of NO x .…”

Section: Photocatalytic Oxidationmentioning

confidence: 99%

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Liu

et al. 2019

Catalysts

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Nitrogen oxides (NO x ) represent one of the main sources of haze and pollution of the atmosphere as well as the causes of photochemical smog and acid rain. Furthermore, it poses a serious threat to human health. With the increasing emission of NO x , it is urgent to control NO x . According to the different mechanisms of NO x removal methods, this paper elaborated on the adsorption method represented by activated carbon adsorption, analyzed the oxidation method represented by Fenton oxidation, discussed the reduction method represented by selective catalytic reduction, and summarized the plasma method represented by plasma-modified catalyst to remove NO x . At the same time, the current research status and existing problems of different NO x removal technologies were revealed and the future development prospects were forecasted.Catalysts 2019, 9, 771 2 of 39 adsorption, oxidation, reduction, and plasma methods. In view of these attentive findings, adsorption method uses recyclable solid adsorbent material to adsorb NO x from flue gas through microporous structure, remarkably, environmentally friendly, no secondary pollution, and energy-saving and -efficient features make it stand out [18][19][20]. The oxidation process is a method that oxidizes NO into NO 2 or N 2 O 3 with high solubility under the action of an oxidant that is then absorbed by water or alkali solution. The process is simple and cost-saving, and is widely used in the wet flue gas denitrification process with relatively low cost and high removal efficiency of NO x ; except that the oxidized NO and SO 2 can be removed simultaneously to produce high value-added products [21][22][23]. The reduction method has the characteristics of high efficiency, cleanliness, and mildness; NO x removal can be realized at low temperature at present [24][25][26]. The plasma method is used to modify the surface of the catalyst, the dispersion of active species can be improved by plasma treatment, and the stability and low temperature activity of catalyst can be improved [27,28].Seldom, if ever, does a comprehensive article to introduce the current situation and treatment methods of removing NO x . In this paper, we tried to renovate, classify, and summarize the significant perspectives and most relevant findings reported in recent research articles and earlier reviews generalizing the mechanism analysis and research progress of NO x removal by adsorption, oxidation, reduction, and plasma methods, which can provide means for promoting the technological progress of pollution prevention, maintaining healthy development of factories continuously, studying the methods of removing NO x deeply, and mastering different technologies of removing NO x , as well as providing guidance for controlling the emission of NO x from motor vehicles such as diesel, gasoline, and so on. In order to improve the environmental quality and save the ecological environment, this paper further provides a convenient, low-cost, efficient, and economic guidance line.

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Carbon wrapped and doped TiO 2 mesoporous nanostructure with efficient visible-light photocatalysis for NO removal

Cited by 74 publications

References 68 publications

An Easy-Made, Economical and Efficient Carbon-Doped Amorphous TiO2 Photocatalyst Obtained by Microwave Assisted Synthesis for the Degradation of Rhodamine B

An Easy-Made, Economical and Efficient Carbon-Doped Amorphous TiO2 Photocatalyst Obtained by Microwave Assisted Synthesis for the Degradation of Rhodamine B

Recent Advances and Applications of Semiconductor Photocatalytic Technology

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

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