Three Dimensional Functionalized Carbon/Tin(IV) Sulfide Biofoam for Photocatalytical Purification of Chromium(VI)-Containing Wastewater

Abstract

Carbon-based materials are widely used for environmental remediation because of their unique and excellent performances. Because of the huge daily consumption of such materials, the economic and environmental friendly derivations from natural biomass are highly desired. Herein, a new biocarbon composite, carbonized loofah/tin­(IV) sulfide (CLF@SnS2) foam, was successfully prepared using loofah biofoam through an efficient and scalable method. The hierarchical CLF@SnS2 foam has a high-porous structure, which can provide channels for light traveling through the whole material. It is confirmed that such three-dimensional photocatalytic material can quickly purify Cr­(VI)-containing wastewater under mild visible light irradiation, with a efficiency of 99.7% Cr­(VI) reduction within 120 min. By contrast, CLF@SnS2 showed much better visible photocatalytic capacity than the uncarbonized counterpart (UCLF@SnS2), because the photoelectrons produced by the SnS2 nanosheets can be rapidly exported by the continuous channels provided by the carbon shell. Besides the high visible light-driven photocatalytic activity, CLF@SnS2 also exhibits excellent cycling stability. More importantly, this study demonstrated that CLF@SnS2 can be used for practical applications due to its flexibility and economic availability.

The Use of a Novel Graphitic Carbon Nitride/Cerium Dioxide (g-C3N4/CeO2) Nanocomposites for the Ofloxacin Removal by Photocatalytic Degradation in Pharmaceutical Industry Wastewaters and the Evaluation of Microtox (Aliivibrio fischeri) and Daphnia magna Acute Toxicity Assays

“…Photocatalysis is widely used in new environmental control strategies. However, this method has a number of key disadvantages, such as insufficient use of visible light, rapid annihilation of photogenerated carriers, and incomplete mineralization, which greatly limits its application [27][28][29][30][31][32][33].…”

The Use of a Novel Graphitic Carbon Nitride/Cobalt Molybdate (G-C3 n4 /ComoO4 ) Nanocomposites for the Doxycycline Removal by Photocatalytic Degradation in Pharmaceutical Industry Wastewaters and the Evaluation of Microtox (Aliivibrio Fischeri) and Daphnia Magna Acute Toxicity Assays

“…Modern purification methods can be roughly divided into the following three categories depending on the purification mechanism: biological treatment, chemical degradation, and physical removal. Each of these methods has its own advantages and disadvantages [25][26][27][28]. For example, biological purification can remove most antibiotic residues, but the introduction of active organisms into the aquatic environment can upset the ecological balance.…”

Bio-Electrochemical Cell Assisted Production of Biogenic Palladium Nanoparticles with Shewanella oneidensis MR-1 Bacteria for the Catalytic Removal of Ofloxacin (OFX) and Doxycycline (DOX) Micropollutants in Pharmaceutical Industry Wastewaters

“…Various chemical approaches (ozonation, chlorination, and Fenton oxidation) cannot provide complete purification and, in some cases, lead to the death of beneficial microorganisms due to low selectivity. Photocatalysis is widely used in new environmental control strategies (Zhong et al, 2018;Alagha et al, 2021;Yang et al, 2022). However, this method has a number of key disadvantages, such as insufficient use of visible light, rapid annihilation of photogenerated carriers, and incomplete mineralization, which greatly limits its application (Yang et al, 2021).…”