Carbon-coated metal materials derived from metal-regulated coordination polymers and γ-polyglutamic acid for efficient removal of environmental pollutants
Xiao-Yu Shi , Jian Luan , Nan Su , Cong Ma , Wen-Long Duan , Ye-Xia Li , Shao-Jie Wang
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引用次数: 0
Abstract
Since organic dye pollution has a detrimental impact on the environment, eliminating and separating them ought to be one of the best ways to address the problem. Two metal–organic coordination polymers (MOCPs), Cu-CP and Ni-CP, were successfully synthesized under hydrothermal conditions and utilized to degrade organic dyes in aqueous solution by photocatalysis. MOCPs were employed as precursors for carbon-coated metal materials (Cu@C and Ni@C) and vanillin-coated metal materials (Cu@γ-PGA and Ni@γ-PGA) by direct pyrolysis and doping pyrolysis, respectively. Doping γ-polyglutamic acid into intrinsic MOCPs significantly improved photocatalytic activity. Ni@γ-PGA demonstrated effective photocatalytic degradation of five organic dyes, particularly MB, with a 99.28 % efficiency. Experiments with free radical capture indicated that ·O2− was the most important factor in photocatalysis. Additionally, tests using photoluminescence (PL), photoelectrochemical (PEC) analysis, X-ray photoelectron spectroscopy (XPS), and UV–vis diffuse reflection spectrum (DRS) demonstrated that Ni@γ-PGA can improve the rapid migration and separation of photo-generated carriers, increase photocatalytic activity, and effectively delay the recombination of photo-generated charges. A new idea for the creation of effective and recyclable semiconductor photocatalytic materials was presented in this study.
期刊介绍:
Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.