High surface area TiO 2 /SBA-15 nanocomposites: Synthesis, microstructure and adsorption-enhanced photocatalysis

Wei, Junqi; Chen, X.J.; Wang, P.F.; Han, Yanbing; Xu, Jingcai; Hong, Bo; Jin, Hongxiao; Jin, Dingfeng; Peng, Xiaoling; Li, J.; Yang, Yanting; Ge, Hongliang; Wang, X.Q.

doi:10.1016/j.chemphys.2018.05.012

Cited by 54 publications

(31 citation statements)

References 36 publications

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“…The increase in photocatalytic activity is mainly associated with an improvement in the degree of crystallinity of TiO 2 due to doping with fluorine [ 32 ]. It has been determined that crystallinity and the specific surface area also affect the photoactivity of TiO 2 [ 33 , 34 ]. The crystalline modification of TiO 2 in comparison with amorphous TiO 2 has significantly fewer defects, which reduce the possibility of recombination processes and contributes to the efficient movement of photogenerated charge carriers in the semiconductor.…”

Section: Factors Affecting the Efficiency Of Photocatalysis And Tementioning

confidence: 99%

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

et al. 2020

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The growth of industrialization, which is forced to use non-renewable energy sources, leads to an increase in environmental pollution. Therefore, it is necessary not only to reduce the use of fossil fuels to meet energy needs but also to replace it with cleaner fuels. Production of hydrogen by splitting water is considered one of the most promising ways to use solar energy. TiO2 is an amphoteric oxide that occurs naturally in several modifications. This review summarizes recent advances of doped TiO2-based photocatalysts used in hydrogen production and the degradation of organic pollutants in water. An intense scientific and practical interest in these processes is aroused by the fact that they aim to solve global problems of energy conservation and ecology.

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Section: Factors Affecting the Efficiency Of Photocatalysis And Tementioning

confidence: 99%

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

et al. 2020

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“…In Figure 5, it was observed that the prepared TiO 2 and Fe-TiO 2 possess mesoporous surface as the isotherms are of type IV and with typical H3 hysteresis loop according to the International Union of Pure and Applied Chemistry (IUPAC) convention; it indicates that TiO 2 sample contain nonrigid aggregates of plate-like or slitshaped pores with a contribution of micropores and mesopores. [56][57][58][59] Furthermore, Figure 6 shows broad pore size distributions, ranging from 1.7 nm to 280 nm, further confirming the existence of micropores, mesopores, and macropores in TiO 2 and Fe-TiO 2 samples according to the BJH adsorption pore distribution. 57 Additionally, from BET data, the particle size, D (nm), was estimated using equation (2), 60 assuming a spherical shape for particles, where S BET refers to BET surface area (m 2 g) and r refers to density of samples (g cm À3 ) and V pore is single point adsorption total pore volume of pores less than 2069.006 Å radius at P/P 0 ¼ 0.995.…”

Section: Resultsmentioning

confidence: 53%

Cypermethrin elimination using Fe-TiO₂ nanoparticles supported on coconut palm spathe in a solar flat plate photoreactor

Solano

Herrera

2020

Advanced Composites Letters

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In this research, the photocatalytic degradation of cypermethrin using iron-titanium dioxide (Fe-TiO2) nanoparticles supported in a biomaterial was evaluated. The nanoparticles of TiO2 were synthesized by the green chemistry method assisted by ultrasound and doped by chemical impregnation using Fe+3:Ti molar ratios of 0, 0.05, 0.075 and 0.1 to make efficient use of direct sunlight ( λ > 310 nm). All nanoparticles were immobilized on the surface of coconut spathe ( Cocos nucifera). The degradation was carried out at room temperature and natural pH in a flat plate solar reactor, on which the composite material was subjected. The concentration of cypermethrin was determined after 12,000 J m−2 of accumulated radiation from gas chromatography–mass spectrometry and the resulting material was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, and Brunauer-Emmett-Teller (BET) surface area. The best results were achieved with the use of Evonik TiO2 P-25, Fe:Ti = 0 and Fe:Ti = 0.05 in suspension, with percentages of degradation of cypermethrin of 99.84%, 99.62%, and 100%, respectively. However, the materials supported on the biomaterial of coconut allowed to reach degradation percentages higher than 80%, with the advantage that it minimizes operating costs, as they are not necessarily filtering or centrifuging processes to separate the catalyst.

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“…Những trở ngại liên quan đến cấu hình thiết bị và tiêu thụ năng lượng đã cản trở việc triển khai chúng ở quy mô lớn [4]. Trong những nỗ lực cải thiện hiệu quả sử dụng năng lượng ánh sáng, việc pha tạp các nguyên tố khác vào TiO2 đang được thực hiện để nâng cao hoạt tính quang xúc tác [5][6][7]. Bên cạnh đó, các quá trình kết hợp giữa UV/TiO2 và các tác nhân oxi hóa khác như hydropeoxit, ozone, hoặc sóng siêu âm đang dần được quan tâm [8][9].…”

Section: Giới Thiệu Chungunclassified

Optimization of opeation parameters for methylene blue degradation by UV/TiO2/H2O2 process in an annular reactor

Duc¹,

Manh²,

Phuong³

et al. 2021

Vietnam j. catal. adsorp.

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In this study, the degradation of methylene blue (MB) by UV/TiO2/ H2O2 process was ivestigated in an annular reactor. The effects of the factors: TiO2 concentration, H2O2 dosage, UV density, and hydrodynamic conditions on the reaction rate constant were evaluated by the response surface methodology. The results showed that TiO2concentration, H2O2dosage and UV density had a great influence on the kapp, hydrodynamics had a lower influence. Design Expert V.11 software is used to optimize the reaction conditions, the optimal apparent reaction rate constant is 0.168 min-1 under the following conditions: TiO2 concentration of 0.2 g/l, H2O2 dosage is 0.063 mol/l, UV density of 287 W/m2 and Re number is 10000.

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High surface area TiO 2 /SBA-15 nanocomposites: Synthesis, microstructure and adsorption-enhanced photocatalysis

Cited by 54 publications

References 36 publications

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Cypermethrin elimination using Fe-TiO₂ nanoparticles supported on coconut palm spathe in a solar flat plate photoreactor

Optimization of opeation parameters for methylene blue degradation by UV/TiO2/H2O2 process in an annular reactor

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High surface area TiO 2 /SBA-15 nanocomposites: Synthesis, microstructure and adsorption-enhanced photocatalysis

Cited by 54 publications

References 36 publications

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Recent Developments of TiO2-Based Photocatalysis in the Hydrogen Evolution and Photodegradation: A Review

Cypermethrin elimination using Fe-TiO2 nanoparticles supported on coconut palm spathe in a solar flat plate photoreactor

Optimization of opeation parameters for methylene blue degradation by UV/TiO2/H2O2 process in an annular reactor

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Cypermethrin elimination using Fe-TiO₂ nanoparticles supported on coconut palm spathe in a solar flat plate photoreactor