Fabrication uniform hollow Bi2S3 nanospheres via Kirkendall effect for photocatalytic reduction of Cr(VI) in electroplating industry wastewater

Luo, Sheng; Qin, Fan; Ming, Yin-an; Zhao, Hongbin; Liu, Yunling; Chen, Rong

doi:10.1016/j.jhazmat.2017.06.044

Cited by 162 publications

(23 citation statements)

References 42 publications

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“…Special morphology, such as hollow nanosphere shaped Bi 2 S 3 is the research focus on the photocatalytic reduction of Cr(VI). [51] Besides, through a facile ethanol-assisted one-pot reaction, Bi 2 S 3 nanostructures of different morphologies such as nanowires (NWs), nanorods (NRs), and nanotubes (NTs) have been prepared. Among them, Bi 2 S 3 NWs displayed the highest photocatalytic activity towards the Cr(VI) reduction under visible light exposure.…”

Section: Other Photocatalystsmentioning

confidence: 99%

Progress on the Photocatalytic Reduction Removal of Chromium Contamination

Zhao

Lin

et al. 2018

The Chemical Record

230

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Rapid industrialization leads to increased wastewater discharge encompassing hexavalent chromium (Cr(VI)), which leads to serious environmental problems of toxicity and potential carcinogenicity. Removal of these species is normally carried out by ion‐exchange, precipitation, membrane filtration, sorption, photocatalytic reduction, etc. This review mainly focuses on the photocatalytic and photoelectrocatalytic (PEC) reduction of Cr (VI), because of their advantages over other methods such as reduced risk of secondary pollution by non‐reduced Cr (VI), no sludge formation, no need for a large amount of chemical reagents, clean and easy installation. The main factors influencing the photocatalytic reduction efficiency of Cr (VI) such as catalyst activity, solution pH, Cr adsorption on the catalyst and additives, are briefly discussed. Finally, a special emphasis is provided to the photoelectrocatalytic (PEC) reduction of Cr (VI).

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Section: Other Photocatalystsmentioning

confidence: 99%

Progress on the Photocatalytic Reduction Removal of Chromium Contamination

Zhao

Lin

et al. 2018

The Chemical Record

230

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“…Therefore, industrial wastewater containing a high concentration of Cr(VI) must be treated before being discharged. The usual methods include chemical reduction [3], membrane separation [4], the photocatalytic method [5], microbial removal [6], and adsorption. Among the chemical methods, the most commonly used are reduction and precipitation, but the cost is high and the sludge treatment is difficult, frequently causing secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Ion-Imprinted Polypropylene Fibers Fabricated by the Plasma-Mediated Grafting Strategy for Efficient and Selective Adsorption of Cr(VI)

Luo

Zhu

et al. 2019

Polymers

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To improve the adsorption selectivity towards hexavalent chromium anion (Cr(VI)), surface Cr(VI)-imprinted polypropylene (PP) fibers were fabricated by the plasma-mediated grafting strategy. Hence, a non-thermal Rradio frequency discharge plasma irradiation followed by a gaseous phase grafting was used to load acrylic acid (AA) onto PP fibers, which was afterwards amidated with triethylenetetramine and subjected to imprinting with a Cr(VI) template. The plasma irradiation conditions, i.e., gas species, output power, pressure, and time, were optimized and then the influence of grafting time, pressure, and temperature on the grafting degree of AA was investigated. Scanning electron microscopy and Fourier transform infrared spectroscopy were used for the characterization of pristine and modified fibers and to confirm the synthesis success. The hydrophilicity of modified fibers was greatly improved compared with pristine PP fibers. The adsorption thermodynamics and kinetics of Cr(VI) were investigated, as well as the elution efficiency and reusability. The prepared imprinted fibers showed superior adsorption selectivity to Cr(VI) compared with non-imprinted fibers. Finally, the stability of the imprinted fibers against the oxidation ability of Cr(VI) is discussed.

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“…Among the famous alternatives to TiO 2 , Bi-based semiconductors including Bi 2 O 3 [9], Bi 2 S 3 [10], Bi 2 WO 6 [11] and BiOX (X = Cl, Br and I) [12], are continuously gaining more attention on account of their prospective application in catalysis. Within the bismuth oxyhalides, BiOBr is a simple p-type semiconductor having a band gap of about 2.61-2.90 eV [13,14].…”

Section: Introductionmentioning

confidence: 99%

Room-temperature in situ synthesis of BiOBr/Bi2O3 composites for the catalytic degradation of ciprofloxacin using indoor fluorescent light illumination

2019

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In this study, a complete room-temperature process for the synthesis of BiOBr/Bi 2 O 3 composites has been developed. The process is facile, rapid and gives high yield. Initially, BiOBr photocatalyst was synthesized via solid-state synthesis using polyethylene glycol 400 (PEG400) as a morphology control agent. Subsequently, an in situ method in aqueous NaOH solution was adopted for the conversion of pristine BiOBr to BiOBr/Bi 2 O 3 composites with variable proportion of α-Bi 2 O 3 , at room-temperature. Alkali etching duration played a key role towards crystalline, surface, morphological and optical properties of BiOBr/Bi 2 O 3 composites, as confirmed by XRD, SEM, XPS, FTIR, UV-DRS, BET and PL characterizations. Compared to pristine BiOBr, the BiOBr/Bi 2 O 3 composites exhibited high activity for ciprofloxacin (CIP) degradation under indoor fluorescent light illumination. Their photocatalytic activity increases with the increase in etching duration up to a period of 60 min and then decreases. The degradation efficiency of aqueous CIP solution (100 mL, 20 ppm) reached 95.3% within 90 min in the presence of BiOBr/Bi 2 O 3-60 which showed the best performance, and the composite remained stable even after five consecutive cycles. Meanwhile, photogenerated holes (h +) and superoxide radical anions (⋅ O − 2) were found to be the dominant degrading species during active species studies, and a possible mechanism for the photocatalytic degradation of CIP over BiOBr/Bi 2 O 3-60 composite photocatalyst has been proposed.

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Fabrication uniform hollow Bi2S3 nanospheres via Kirkendall effect for photocatalytic reduction of Cr(VI) in electroplating industry wastewater

Cited by 162 publications

References 42 publications

Progress on the Photocatalytic Reduction Removal of Chromium Contamination

Progress on the Photocatalytic Reduction Removal of Chromium Contamination

Ion-Imprinted Polypropylene Fibers Fabricated by the Plasma-Mediated Grafting Strategy for Efficient and Selective Adsorption of Cr(VI)

Room-temperature in situ synthesis of BiOBr/Bi2O3 composites for the catalytic degradation of ciprofloxacin using indoor fluorescent light illumination

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