Highly sensitive fluorescence detection of chloride ion in aqueous solution with Ag-modified porous g-C3N4 nanosheets |
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| Institution: | 1. College of Electronic Engineering, Heilongjiang University, Harbin 150080, China;2. Key Laboratory of Functional Inorganic Materials Chemistry (Ministry of Education), International Joint Research Center for Catalytic Technology, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China;3. College of Physical Science and Technology, Heilongjiang University, Harbin 150080, China;4. College of Media Engineering, Communication University of Zhejiang, Hangzhou 310018, China;1. Key Laboratory of Western China''s Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;2. Academy of Economics and Environmental Sciences, Xichang University, Xichang 615000, China;1. State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, China;2. School of Engineering, Edith Cowan University, 270 Joondalup Drive, Perth WA 6027, Australia;3. China General Nuclear Power Hongda Environmental Science and Technology Co., Ltd., Jinan 250000, China;4. Dongying Municipal Bureau of Marine Development and Fisheries, Dongying Municipal Marine and Fishery Environmental Monitoring Center, Dongying 257091, China;5. School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide SA 5005, Australia;1. College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China;2. Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;1. School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, Hubei, China;2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, Hubei, China;1. School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo, 315100, China;2. Ningbo Research Institute, Zhejiang University, Ningbo, 315100, China;1. School of Environment, Jinan University, Guangzhou 510632, China;2. School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China;3. Department of Chemistry, University of California, Riverside, CA 92521, United States |
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| Abstract: | The porous g-C3N4 (PCN) nanosheets are successfully synthesized and further modified with nano-sized Ag by a simple wet-chemical process. Interestingly, the Ag-modified porous g-C3N4 (Ag-PCN) nanosheets exhibit competitive fluorescence detection performance of chloride ion (Cl?) in aqueous solution. Under the optimized conditions, the concentration of Cl? could be quantitative analyzed with the Ag-PCN in a wide detection range from 0.5 mmol/L to 0.1 mol/L, with a low detection limitation of 0.06 mmol/L. It is confirmed that the fluorescence of PCN could be effectively decayed by the photoinduced charge transfer via the adsorbed Cl? for trapping holes, mainly by means of the time-resolved fluorescence and surface photovoltage spectra. The porous structure and modified Ag promote the adsorption of Cl? on resulting Ag-PCN, leading to excellent fluorescence detection for Cl?. This work provides a feasible route to develop a fluorescence detection of Cl? with g-C3N4 nanosheets in environment water. |
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| Keywords: | Ag-modification Chloride ion Fluorescence detection Photoinduced charge transfer |
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