多功能 CaBi LDH/Ag-gC3N4 催化复合材料用于可持续污染修复和光化学转化为可用衍生物

IF 5.2 2区 化学 Q1 CHEMISTRY, APPLIED
Prabagar Jijoe Samuel , Challaraj Emmanuel E S , Vinod Divya , Mohammad Khalid , Mohammed H. Alqarni , Harikaranahalli Puttaiah Shivaraju
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引用次数: 0

摘要

设计了一种以蛋壳钙为原料合成CaBi LDH/Ag-gC3N4复合材料的方法。复合材料是将大气气体转化为增值衍生物和具有抗菌潜力的光催化修复的有力催化剂。采用溶剂热和水热技术制备了一种新型的CaBi LDH/Ag-gC3N4,并进行了复杂的表征。表征研究证实了Ag-gC3N4的结晶度增强,完整的Ag-gC3N4成CaBi LDH结构,团簇状云状结构,易于电子迁移转移,电荷分离广泛,光催化能力强。CaBi LDH/Ag-gC3N4复合材料进一步证明了N2和CO2在可见光下分别光催化转化为NH3(在45 min下可达84.02 μmol/L)和功能烃衍生物(在4 hr下可分别转化为c2h60 ~ 350 μmol/L和CH3OH ~ 118.2 μmol/L)。该复合材料对环丙沙星(CPF)具有良好的可见光光催化修复效果,对大肠杆菌和金黄色葡萄球菌具有良好的抑菌效果,其作用机制得到了很好的支持。讨论了CaBi LDH/Ag-gC3N4的光还原机理,发现g-C3N4的CB位置(-1.16 eV)相对小于CaBi LDH的CB位置(-0.73 eV)。在每个光催化反应中都设计了一个复杂的机制,以阐明符合预期反应的一般反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multifunctional CaBi LDH/Ag-gC3N4 catalytic composite for sustainable pollution remediation and photochemical conversion into usable derivatives
A simple methodology was devised for synthesizing the CaBi LDH/Ag-gC3N4 composite using eggshell-derived calcium. Composite is a potent catalyst for converting atmospheric gases into value-added derivatives and photocatalytic remediation with antimicrobial potential. An innovative CaBi LDH/Ag-gC3N4 was effectively fabricated using solvothermal and hydrothermal techniques and was subjected to sophisticated characterizations. Enhanced crystallinity with the intact framework of Ag-gC3N4 into CaBi LDH, agglomerated cloud-like structure, easy electron mobility transfer with extensive charge separation and high photocatalysis have been confirmed by characterization studies. The CaBi LDH/Ag-gC3N4 composite further demonstrated photocatalytic conversion of N2 and CO2 into NH3 (up to 84.02 µmol/L at 45 min) and functional hydrocarbon derivatives (C2H6O ∼350 μmol/L and CH3OH ∼118.2 μmol/L at 4 hr) respectively under visible light. The composite demonstrated superior photocatalytic remediation of ciprofloxacin (CPF) under visible spectrum and antibacterial efficacy against two pathogens, Escherichia coli and Staphylococcus aureus, supported by well suggested mechanism. The photoreduction mechanism of CaBi LDH/Ag-gC3N4 is discussed, and the CB position of g-C3N4 (-1.16 eV) showed comparatively having lesser value (negative) than CB of CaBi LDH (-0.73 eV). An intricate mechanism has been devised in each photocatalytic reaction to elucidate the general reactions in line with the intended reactions.
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来源期刊
Catalysis Today
Catalysis Today 化学-工程:化工
CiteScore
11.50
自引率
3.80%
发文量
573
审稿时长
2.9 months
期刊介绍: Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.
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