The facile fabrication of 2D/3D Z-scheme g-C3N4/UiO-66 heterojunction with enhanced photocatalytic Cr(VI) reduction performance under white light

By Xiao-Hong Yi, Si-Qi Ma, X. Du, Chen Zhao, Huifen Fu, Peng Wang, Chongchen Wang. Chemical Engineering Journal, 2019

301 citations recorded by the source corpus.

Abstract Z-scheme g-C3N4/UiO-66 (BGxUy) heterojunctions constructed from 3D UiO-66 and 2D g-C3N4 sheets were facilely fabricated using ball-milling method, which were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), N2 adsorption-desorption measurement (BET), thermogravimetric analysis (TGA), UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS), photoluminescence spectroscopy (PL), electrochemical impedance spectroscopy (EIS), electron spin resonance (ESR) and density functional theory (DFT) calculations. The photocatalytic activities of Cr(VI) reduction over the BGxUy heterojunctions were tested upon the irradiation of white light. The influence factors on photocatalytic performances of BG60U40 like different organics, pH and different co-existing foreign ions (ions in lake water, tap water, simulated sea water, and simulated leather tanning water) were clarified. The experiment results demonstrated that the optimal BG60U40 exhibited superior Cr(VI) reduction efficiency than pristine UiO-66 and g-C3N4 due to the declined recombination of photo-induced charge carriers. As well, the heterojunction displayed good reusability and stability in the cyclic experiment. The corresponding Z-scheme mechanism of photocatalytic Cr(VI) reduction was proposed and verified by electrochemical analysis, ESR measurement and DFT calculations.

Subfields: Inorganic Chemistry, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/1c5a26ff6616bd2bede44758f6eb3a8ef2994cc8

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In Inorganic Chemistry

1. Chongchen Wang
2. Xiao-Hong Yi
3. Wen Liu
4. Xun Wang
5. Peng Wang

In Materials Chemistry

1. Chongchen Wang
2. Xiao-Hong Yi
3. Peng Wang
4. Wen Liu
5. Xun Wang

In Renewable Energy, Sustainability and the Environment

1. Chongchen Wang
2. Xiao-Hong Yi
3. Wen Liu
4. Xun Wang
5. Peng Wang
6. Xu Zhao

Citations in the corpus

• The synthesis strategies and photocatalytic performances of TiO2/MOFs composites: A state-of-the-art review (2020, background): “Up to now, some (NH2)-UiO-66-based composites can further increase the photocatalytic activity owing to the synergistic effect between the coupled components [86,87,227,228,324].”
• Photocatalysis-activated SR-AOP over PDINH/MIL-88A(Fe) composites for boosted chloroquine phosphate degradation: Performance, mechanism, pathway and DFT calculations (2021, background): “n is judged by the optical transition type of the semiconductor (indirect (n = 4) or direct (n = 1)) [35].”
• Facile fabrication of BUC-21/Bi24O31Br10 composites for enhanced photocatalytic Cr(VI) reduction under white light (2020, methodology): “While the OH and h+ can be captured by t-butanol (TBA) and EDTA-2Na, respectively [102,115].”