Infrared-to-visible upconversion enhanced photothermal catalytic degradation of toluene over Yb3+, Er3+: CeO2/attapulgite nanocomposite: Effect of rare earth doping

Huang, Jie; Ye, Xuhua; Li, Wenjun; Shi, Anqi; Chu, Xini; Cao, Ziwen; Yao, Chao; Li, Xiazhang

doi:10.1016/j.jiec.2022.09.040

Cited by 13 publications

(7 citation statements)

References 27 publications

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“…The band gaps of Co2SiO4 and Co3O4 in Figure 3b are estimated by the formula of (ahv) n/2 = A (hv − Eg); where a, h, v, A, and Eg represent the optical absorption coefficient, Planck constant, optical frequency, a constant, and band gap. The values n = 1 and n= 4 represent the indirect and direct band gap semiconductors, respectively [16,17]. As shown in Figure 3b, the corresponding band gap energies of Co2SiO4 and Co3O4 are estimated to be 3.39 and 1.53 eV, respectively.…”

Section: Uv-vis-nirmentioning

confidence: 98%

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Qin

Ge²,

Kong³

et al. 2022

Catalysts

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The coupled utilization of solar and thermal energy is considered an efficient way to improve the efficiency of CO2 reduction. Herein, palygorskite (Pal) clay is as a silicon source, while Co2+ is introduced to prepare two-dimensional Co2SiO4 nanosheets, and the excess of Co2+ leads to the growth of Co3O4 on the surface of Co2SiO4 to obtain an S-scheme Co2SiO4/Co3O4−x heterojunction, which facilitates the charge transfer and maintains higher redox potentials. Benefiting from black color and a narrow band gap, the cobalt oxide on the surface can increase the light absorption and produce a local photothermal effect. Under proper thermal activation conditions, the photoelectrons captured by the abundant oxygen vacancies can obtain a secondary leap to the semiconductor conduction band (CB), suppressing the recombination of electron-hole pairs, thus favoring the electron transfer on Co2SiO4/Co3O4−x. The composites not only have abundant oxygen vacancies, but also have a large specific surface area for the adsorption and activation of CO2. The yields of CH3OH on Co2SiO4/Co3O4−5% reach as high as 48.9 μmol·g−1·h−1 under simulated sunlight irradiation. In situ DRIFTS is used to explore the photocatalytic reduction CO2 mechanism. It is found that the thermal effect facilitates the generation of the key intermediate COOH* species. This work provides a new strategy for photothermal catalytic CO2 reduction by taking advantage of natural clay and solar energy.

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Section: Uv-vis-nirmentioning

confidence: 98%

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Qin

Ge²,

Kong³

et al. 2022

Catalysts

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“…Moreover, co-doping CeO 2 /ATP with Yb 3þ and Er 3þ increases the amount of oxygen vacancy and improves both adsorption and activation of molecular O 2 , favoring toluene degradation according to the MvK reaction pathway. [146] The electron spin resonance (ESR) DMPO- ESR signals over CeO 2 :Yb 3þ , Er 3þ /ATP were observed without irradiation, suggesting that photocatalysis promotes the photothermal oxidation process. Analysis of the in situ DRIFT spectra suggested the build-up of aromatic intermediates on the CeO 2 :Yb 3þ , Er 3þ /ATP surface without irradiation at 250 °C (Figure 10d).…”

Section: Lanthanide-doped Upconversion Materialsmentioning

confidence: 99%

“…[62,147] Moreover, the dopants, Yb 3þ/ Er 3þ , are important for the light response, making upconversion materials a suitable choice for photothermal oxidative reactions. [146] Copyright 2022, Elsevier.…”

Section: Lanthanide-doped Upconversion Materialsmentioning

confidence: 99%

“…Recently, Huang and coworkers [ 146 ] co‐doped CeO 2 with the rare earth metals Yb 3+ and Er 3+ , which was subsequently assembled on attapulgite clay (ATP) and calcinated at 300 °C for 2 h. [ 146 ] Light irradiation was introduced into the reactor via a window on top of the heating furnace. The temperature of the reactor was regulated between 150 and 400 °C for 10 min at a ramping rate of 25 °C.…”

Section: Photothermal Catalytic Materialsmentioning

confidence: 99%

mentioning

confidence: 99%

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Harnessing Solar Energy Towards Synergistic Photothermal Catalytic Oxidation of Volatile Organic Compounds

et al. 2023

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Volatile organic compounds (VOCs) are prominent air pollutants, hazardous to human health and the environment. Sunlight is a sustainable energy source capable of meeting the demands for heterogeneous catalysis. Photothermal catalysis has emerged as an energy‐efficient technology for VOCs oxidation by merging the advantages of thermochemistry and photocatalysis. This review examines the advantages of the photothermal catalytic system, such as the absorption and conversion of solar light, accelerated reaction rates, and improved product selectivity. The photothermal catalytic system is clearly categorized according to the significant contributions of light and thermal energy to the reaction. As a result of the direct conversion of photons into thermal energy to surpass the light‐off temperature and drive the catalytic reaction, an ample discussion of light‐induced thermal catalytic processes is presented. Furthermore, the participation of the localized surface plasmon resonance effect and oxygen vacancies in the surface reaction under irradiation and thermal energy are spotlighted. A comprehensive discussion is provided for the various photothermal active nanostructures. The underlying superior resistance mechanism to water vapour and coke formation as well as high oxygen concentrations in photothermal catalytic system are emphatically highlighted. Finally, current research trends and prospects are discussed.

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Construction of spinel/biochar film/honeycomb monolithic catalyst for photothermal catalytic oxidation of VOCs

Lu,

Zhang,

et al. 2024

Front. Chem. Sci. Eng.

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Infrared-to-visible upconversion enhanced photothermal catalytic degradation of toluene over Yb3+, Er3+: CeO2/attapulgite nanocomposite: Effect of rare earth doping

Cited by 13 publications

References 27 publications

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Photothermal Catalytic Reduction of CO2 by Cobalt Silicate Heterojunction Constructed from Clay Minerals

Harnessing Solar Energy Towards Synergistic Photothermal Catalytic Oxidation of Volatile Organic Compounds

Construction of spinel/biochar film/honeycomb monolithic catalyst for photothermal catalytic oxidation of VOCs

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