Synthesis and Characterization of TiO2/YFeO3 and Its Photocatalytic Oxidation of Gaseous Benzene

Wang, Weicheng; Li, Shuo; Wen, Yiyun; Gong, Maochu; Zhang, Lei; Yao, Yanling; Chen, Yaoqiang

doi:10.1016/s1872-1508(08)60072-8

Cited by 39 publications

(14 citation statements)

References 23 publications

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“…This gap corresponds to 387 nm wavelength light and high recombination between electron-hole pairs. A number of works have focused on elevating the photocatalytic activity of TiO 2 , including studies involving doping with metals [ 57 , 71 ], doping with nonmetals [ 72 – 76 ], and coupling with other supports [ 50 , 52 , 66 – 68 , 77 – 87 ].…”

Section: Photocatalystsmentioning

confidence: 99%

A Review of Photocatalysts Prepared by Sol-Gel Method for VOCs Removal

Tseng

Lin

Chen

et al. 2010

IJMS

244

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The sol-gel process is a wet-chemical technique (chemical solution deposition), which has been widely used in the fields of materials science, ceramic engineering, and especially in the preparation of photocatalysts. Volatile organic compounds (VOCs) are prevalent components of indoor air pollution. Among the approaches to remove VOCs from indoor air, photocatalytic oxidation (PCO) is regarded as a promising method. This paper is a review of the status of research on the sol-gel method for photocatalyst preparation and for the PCO purification of VOCs. The review and discussion will focus on the preparation and coating of various photocatalysts, operational parameters, and will provide an overview of general PCO models described in the literature.

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Section: Photocatalystsmentioning

confidence: 99%

A Review of Photocatalysts Prepared by Sol-Gel Method for VOCs Removal

Tseng

Lin

Chen

et al. 2010

IJMS

244

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“…Numerous researches had found that semiconductor photocatalytic technology can be efficacious means of solving the growing environmental pollution and energy crisis around the world [4][5][6][7]. However, common photocatalyst are limited in application for narrow light absorption range, poor stabilization, and lower photodegradation efficiency [8,9]. To improve the photocatalytic performance, abundant research was carried out concentrating on the formation of Z-scheme heterojunction [10,11], especially dual Z-scheme system photocatalyst [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

et al. 2020

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Promoting the separation of photogenerated charges and enhanced optical absorption capacity is the main means to modify photocatalytic capacities to advance semiconductor photocatalyst applications. For the first time, a novel ternary photocatalyst for dual Z-scheme system AgBr/LaNiO3/g-C3N4 (ALG) was prepared via a modest ultrasound-assisted hydrothermal method. The results indicated that LaNiO3 nanoballs and AgBr nanoparticles were successfully grown on the surface of g-C3N4 nanosheets. A dual Z-scheme photocatalytic reaction system could be constructed based on the energy band matching within AgBr, LaNiO3 and g-C3N4. Metallic Ag during the photocatalytic reaction process acted as the active electrons transfer center to enhance the photocatalytic charge pairs separation. The chemical composition of ALG was optimized and composites with 3% AgBr, 30% LaNiO3 and 100% g-C3N4 which was noted as 3-ALG displayed the best photocatalytic performance. A total of 92% of norfloxacin (NOR) was photodegraded within two hours over ALG and the photodegradation rate remained >90% after six cycles. The main active species during the degradation course were photogenerated holes, superoxide radical anion and hydroxyl radical. A possible mechanism was proposed based on the synergetic effects within AgBr, LaNiO3 and g-C3N4. This work would offer a credible theoretical basis for the application of dual Z-scheme photocatalysts in environment restoration.

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“…In all the above equations, assume that no influence of reaction products on the reaction rate and the major parameters are concentrations of organics and water vapor. Owing to the immediate decomposition of the model compound into CO 2 and other intermediates, the influence of these compounds must be considered on the L‐H rate equations and this, even if their adsorption onto catalyst surface is weak . The general form of the L‐H equation for photocatalytic reactions in this case is given by

r_{i} = \frac{k_{i} K_{i} C_{i}}{1 + \sum_{j = 1}^{n} K_{j} C_{j}},

where subscript i refers to component “ i ”, r i is the reaction rate (mol⋅g cat −1 ⋅min −1 ), k i is the reaction kinetic constant (mol⋅g cat −1 ⋅min −1 ), K i is the absorption constant (mol −1 ⋅L), and C i is the concentration of the participating species (mol⋅L −1 ).…”

Section: Introductionmentioning

confidence: 99%

“…Owing to the immediate decomposition of the model compound into CO 2 and other intermediates, the influence of these compounds must be considered on the L-H rate equations and this, even if their adsorption onto catalyst surface is weak. 52 The general form of the L-H equation for photocatalytic reactions in this case is given by 53…”

Section: Introductionmentioning

confidence: 99%

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Thuy¹,

Lộc

Tri³

et al. 2019

Int J of Chemical Kinetics

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The thin film photocatalysts were prepared from solvothermal UiO‐66‐NH2 and sol‐gel perovskite LaFeO3 by a dip‐coating technique. The properties of obtained catalysts were investigated by the methods of Brunauer‐Emmett‐Teller adsorption, XRD, SEM, FT‐IR, TGA, and UV‐vis spectroscopies. The results proved that the thin film of the thickness of 4.2 and 4.7 µm was successfully prepared from micro‐mesoporous UiO‐66‐NH2 and LaFeO3 nanocrystals. Possessing small crystals (9‐35 nm) and the band gap energy of 2.83 and 1.92 eV, respectively, UiO‐66‐NH2 and LaFeO3 are shown to be a highly active visible‐light photocatalyst for photodegradation of p‐xylene‐contained gas. The kinetics of photocatalytic degradation of p‐xylene under combined illumination of ultraviolet and visible lights over obtained UiO‐66‐NH2 and LaFeO3 thin films were carried out in a gradientless flow circulating system at room temperature and atmospheric pressure. The results showed that the Langmuir‐Hinshelwood kinetic model was successfully applied to correlate the obtained data. The kinetics of the reaction on both catalysts were found to be written by the fractional equation, describing the dependence of the reaction rate on the concentration of p‐xylene, oxygen molecules, dissociative adsorbed water vapor, the photon flux, and the inhibition of CO2 product. It implies that the reaction occurred at high surface coverages, molecular p‐xylene, and oxygen participated in the reaction in the form of surface molecular; water—in the forms of •OH and H+. Although there is a general kinetic equation for reaction on various catalysts, the different affinities of the catalysts with the compounds present in the reaction create the kinetic feature of the reaction on each catalyst. Because of the high affinity of catalysts with water vapor, the given reactant increased the rate of p‐xylene photocatalytic degradation at low concentration but inhibited it in the high concentration region. The adsorption affinity of LaFeO3 to oxygen is higher compared to UiO‐66‐NH2; then, there was an optimum concentration of oxygen in the photodegradation of p‐xylene on the former, whereas in the latter monotonically increasing relationship was found.

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Synthesis and Characterization of TiO2/YFeO3 and Its Photocatalytic Oxidation of Gaseous Benzene

Cited by 39 publications

References 23 publications

A Review of Photocatalysts Prepared by Sol-Gel Method for VOCs Removal

A Review of Photocatalysts Prepared by Sol-Gel Method for VOCs Removal

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

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Synthesis and Characterization of TiO2/YFeO3 and Its Photocatalytic Oxidation of Gaseous Benzene

Cited by 39 publications

References 23 publications

A Review of Photocatalysts Prepared by Sol-Gel Method for VOCs Removal

A Review of Photocatalysts Prepared by Sol-Gel Method for VOCs Removal

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH2 and LaFeO3 thin films under combined illumination of ultraviolet and visible lights

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Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights