Removal of total chromium in wastewater via simultaneous photocatalysis and adsorption using calcium silicate hydrate-based composites

文献情報

出版日 2023-10-19

DOI 10.1039/D3TA05384A

インパクトファクター 12.732

著者

Min Liu, Qi Liu, Xue-Ting Jin, Ya-Chen Zou, Di-Ning Li, Pan Feng, Yang-Hui Luo

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要旨

Converting Cr(VI) to Cr(III) and subsequent precipitation of Cr(III) represents an efficient approach for wastewater treatment. Although it is possible to eliminate Cr(III) by adjusting the pH to elicit precipitation, this method is expensive and can lead to secondary pollution. Herein, we report a composite (C-S-U) composed of calcium silicate hydrate (C-S-H) and UiO-66-NH2 nanoparticles (UN NPs). We demonstrated a remarkable synergistic effect for the purification of total chromium concentration (Cr(T)) attributed to the affinity of Cr(III) to C-S-H, coupled with the Cr(III) sorption-enhanced photocatalysis. C-S-U exhibited a significantly enhanced photocatalytic rate (0.052 min−1) for Cr(VI) but also delivered outstanding sorption capacity (217.9 mg g−1) towards Cr(III). Cr(T) could be reduced to an ultra-low level (∼0.007 mg L−1) within 90 min. Meanwhile, regeneration of Cr(III)-passivated C-S-U and Cr recollection was achieved. Electrochemical analysis and X-ray photoelectron spectroscopy were undertaken to reveal the mechanism of removal.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Removal of total chromium in wastewater via simultaneous photocatalysis and adsorption using calcium silicate hydrate-based composites

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掲載誌

Journal of Materials Chemistry A

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