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Yang W, Ye L, Wu Y, Wang X, Ye S, Deng Y, Huang K, Luo H, Zhang J, Zheng C. Arsenic field test kits based on solid-phase fluorescence filter effect induced by silver nanoparticle formation. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134038. [PMID: 38552392 DOI: 10.1016/j.jhazmat.2024.134038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 03/02/2024] [Accepted: 03/12/2024] [Indexed: 04/25/2024]
Abstract
Millions of people worldwide are affected by naturally occurring arsenic in groundwater. The development of a low-cost, highly sensitive, portable assay for rapid field detection of arsenic in water is important to identify areas for safe wells and to help prioritize testing. Herein, a novel paper-based fluorescence assay was developed for the on-site analysis of arsenic, which was constructed by the solid-phase fluorescence filter effect (SPFFE) of AsH3-induced the generation of silver nanoparticles (AgNPs) toward carbon dots. The proposed SPFFE-based assay achieves a low arsenic detection limit of 0.36 μg/L due to the efficient reduction of Ag+ by AsH3 and the high molar extinction coefficient of AgNPs. In conjunction with a smartphone and an integrated sample processing and sensing platform, field-sensitive detection of arsenic could be achieved. The accuracy of the portable assay was validated by successfully analyzing surface and groundwater samples, with no significant difference from the results obtained through mass spectrometry. Compared to other methods for arsenic analysis, this developed system offers excellent sensitivity, portability, and low cost. It holds promising potential for on-site analysis of arsenic in groundwater to identify safe well locations and quickly obtain output from the global map of groundwater arsenic.
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Affiliation(s)
- Wenhui Yang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China; Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Liqing Ye
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China; Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yuke Wu
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xi Wang
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Simin Ye
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Yurong Deng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Ke Huang
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Hong Luo
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China.
| | - Jinyi Zhang
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
| | - Chengbin Zheng
- Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
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Nadumane SS, Biswas R, Mazumder N. Integrated microfluidic platforms for heavy metal sensing: a comprehensive review. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2810-2823. [PMID: 38656324 DOI: 10.1039/d4ay00293h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Heavy metals are found naturally; however, anthropogenic activities such as mining, inappropriate disposal of industrial waste, and the use of pesticides and fertilizers containing heavy metals can cause their unwanted release into the environment. Conventionally, detection of heavy metals is performed using atomic absorption spectrometry, electrochemical methods and inductively coupled plasma-mass spectrometry; however, they involve expensive and sophisticated instruments and multistep sample preparation that require expertise for accurate results. In contrast, microfluidic devices involve rapid, cost-efficient, simple, and reliable approaches for in-laboratory and real-time monitoring of heavy metals. The use of inexpensive and environment friendly materials for fabrication of microfluidic devices has increased the manufacturing efficiency of the devices. Different types of techniques used in heavy metal detection include colorimetry, absorbance-based, and electrochemical detection. This review provides insight into the detection of toxic heavy metals such as mercury (Hg), cadmium (Cd), lead (Pb), and arsenic (As). Importance is given to colorimetry, optical, and electrochemical techniques applied for the detection of heavy metals using microfluidics and their modifications to improve the limit of detection (LOD).
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Affiliation(s)
- Sharmila Sajankila Nadumane
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India-576104
| | - Rajib Biswas
- Applied Optics and Photonics Laboratory, Department of Physics, Tezpur University, Tezpur, Assam, India -784028
| | - Nirmal Mazumder
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India-576104
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He X, Yan W, Chen X, Li Q, Li M, Yan Y, Yan B, Yao Q, Li G, Wu T, Jia Y, Liu C. Degradation of algae promotes the release of arsenic from sediments under high-sulfate conditions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 342:123154. [PMID: 38101530 DOI: 10.1016/j.envpol.2023.123154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/15/2023] [Accepted: 12/11/2023] [Indexed: 12/17/2023]
Abstract
Sulfate concentrations in eutrophic waters continue to increase; however, the transformations of arsenic (As) in sediments under these conditions are unclear. In this study, we constructed a series of microcosms to investigate the effect of algal degradation on As transformations in sediments with high sulfate concentrations. The results showed that both the elevated sulfate levels and algal degradation enhanced the release of As from sediments to the overlying water, and degradation of algal in the presence of elevated sulfate levels could further contribute to As release. Sulfate competed with arsenate for adsorption in the sediments, leading to As desorption, while algal degradation created a strongly anaerobic environment, leading to the loss of the redox layer in the surface sediments. With high sulfate, algal degradation enhanced sulfate reduction, and sulfur caused the formation of thioarsenates, which may cause re-dissolution of the arsenides, enhancing As mobility by changing the As speciation. The results of sedimentary As speciation analysis indicated that elevated sulfur levels and algal degradation led to a shift of As from Fe2O3/oxyhydroxide-bound state to specifically adsorbed state at the sediment water interface. This study indicated that algal degradation increases the risk of As pollution in sulfate-enriched eutrophic waters.
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Affiliation(s)
- Xiangyu He
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China
| | - Wenming Yan
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China.
| | - Xiang Chen
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - Qi Li
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China
| | - Minjuan Li
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China
| | - Yulin Yan
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China
| | - Binglong Yan
- Lianyungang Water Conservancy Planning and Designing Institute Co., Ltd., Lianyungang, 222006, China
| | - Qi Yao
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China
| | - Gaoxiang Li
- State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, 210098, China
| | - Tingfeng Wu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Yushan Jia
- Shilianghe Reservoir Management Office, Lianyungang, 222006, China
| | - Congxian Liu
- Lianyungang Water Conservancy Bureau, Lianyungang, 222006, China
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4
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Liu B, Zhou LZ, He GW, Wang C. Highly efficient determination of metal ion in cosmetic samples by reversed-phase liquid-liquid microextraction based on green hydrophobic deep eutectic solvent. ANAL SCI 2024; 40:115-121. [PMID: 37845601 DOI: 10.1007/s44211-023-00437-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 09/23/2023] [Indexed: 10/18/2023]
Abstract
In this paper, a green hydrophobic deep eutectic solvent (HDES) composed of menthol and hexanoic acid was employed to dissolve cosmetics containing Cd2+ and Cd2+ was extracted using an EDTA-2Na saturated solution, analyzed by FAAS. The study found that HDES-1 can be recycled and reused well; the stability constants of Cd2+ EDTA chelates play an important role in the extracting process; the optimum conditions were: the solubility of HDES-1 was 20 mL/g for cosmetic sample at an indoor temperature of around 10 °C; the dissolver-extractant ratio was 2:1; the LOD was 0.037 mg/kg; the RSD was 3.5%; and the recovery was 85.5-118.3%. The developed method was successfully applied to actual cosmetic samples with satisfactory results, and it was also applied for the determination of Mg2+, Mn2+, and Cu2+ in cosmetic samples.
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Affiliation(s)
- Bangfu Liu
- Hunan Electronic Information Industry Institute, Jiefangdonglu 51, Changsha, 410000, Hunan, People's Republic of China.
| | - Le-Zhou Zhou
- Hunan Prevention and Treatment Institute for Occupational Disease, Changsha, 410007, Hunan, People's Republic of China
| | - Guo-Wen He
- College of Materials and Chemical Engineering, Hunan City University, Yiyang, 413000, Hunan, People's Republic of China
| | - Chaoli Wang
- Department of Pharmacy, Air Force Military Medical University, Xi'an, 710000, Shanxii, People's Republic of China
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Samadifar M, Yamini Y, Khataei MM, Shirani M. Automated and semi-automated packed sorbent solid phase (micro) extraction methods for extraction of organic and inorganic pollutants. J Chromatogr A 2023; 1706:464227. [PMID: 37506462 DOI: 10.1016/j.chroma.2023.464227] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/06/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
In this study, the packed sorbent solid phase (micro) extraction methods from manual to automated modes are reviewed. The automatic methods have several remarkable advantages such as high sample throughput, reproducibility, sensitivity, and extraction efficiency. These methods include solid-phase extraction, pipette tip micro-solid phase extraction, microextraction by packed sorbent, in-tip solid phase microextraction, in-tube solid phase microextraction, lab-on-a-chip, and lab-on-a-valve. The recent application of these methods for the extraction of organic and inorganic compounds are discussed. Also, the combination of novel technologies (3D printing and robotic platforms) with the (semi)automated methods are investigated as the future trend.
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Affiliation(s)
- Mahsa Samadifar
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Iran
| | - Yadollah Yamini
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Iran.
| | | | - Mahboue Shirani
- Department of Chemistry, Faculty of Sciences, University of Jiroft, Jiroft, Iran
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Metabolite Fingerprinting for Identification of Panax ginseng Metabolites Using Internal Extractive Electrospray Ionization Mass Spectrometry. Foods 2023; 12:foods12061152. [PMID: 36981079 PMCID: PMC10048038 DOI: 10.3390/foods12061152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/08/2023] [Accepted: 02/24/2023] [Indexed: 03/11/2023] Open
Abstract
Ginseng, a kind of functional food and medicine with high nutritional value, contains various pharmacological metabolites that influence human metabolic functions. Therefore, it is very important to analyze the composition and metabolites of ginseng. However, the analysis of active metabolites in ginseng samples usually involves various experimental steps, such as extraction, chromatographic separation, and characterization, which may be time-consuming and laborious. In this study, an internal extractive electrospray ionization mass spectrometry (iEESI-MS) method was developed to analyze active metabolites in ginseng samples with sequential sampling and no pretreatment. A total of 44 metabolites, with 32 ginsenosides, 6 sugars, and 6 organic acids, were identified in the ginseng samples. The orthogonal partial least-squares discriminant analysis (OPLS-DA) score plot showed a clear separation of ginseng samples from different origins, indicating that metabolic changes occurred under different growing conditions. This study demonstrated that different cultivation conditions of ginseng can be successfully discriminated when using iEESI-MS-based metabolite fingerprints, which provide an alternative solution for the quality identification of plant drugs.
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Qiu Z, Wei C, Li X, Lai C, Zhan Z, Jin Y, Zhou L, Hao Q, Yang J, Wang S, Kang L, Huang L. Rapid authentication of different herbal medicines by heating online extraction electrospray ionization mass spectrometry. J Pharm Anal 2023; 13:296-304. [PMID: 37102106 PMCID: PMC10123936 DOI: 10.1016/j.jpha.2023.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 01/18/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
The rapid and accurate authentication of traditional Chinese medicines (TCMs) has always been a key scientific and technical problem in the field of pharmaceutical analysis. Herein, a novel heating online extraction electrospray ionization mass spectrometry (H-oEESI-MS) was developed for the rapid and direct analysis of extremely complex substances without the requirement for any sample pretreatment or pre-separation steps. The overall molecular profile and fragment structure features of various herbal medicines could be completely captured within 10-15 s, with minimal sample (<0.5 mg) and solvent consumption (<20 μL for one sample). Furthermore, a rapid differentiation and authentication strategy for TCMs based on H-oEESI-MS was proposed, including metabolic profile characterization, characteristic marker screening and identification, and multivariate statistical analysis model validation. In an analysis of 52 batches of seven types of Aconitum medicinal materials, 20 and 21 key compounds were screened out as the characteristic markers of raw and processed Aconitum herbal medicines, respectively, and the possible structures of all the characteristic markers were comprehensively identified based on Compound Discoverer databases. Finally, multivariate statistical analysis showed that all the different types of herbal medicines were well differentiated and identified (R2X > 0.87, R2Y > 0.91, and Q2 > 0.72), which further verified the feasibility and reliability of this comprehensive strategy for the rapid authentication of different TCMs based on H-oEESI-MS. In summary, this rapid authentication strategy realized the ultra-high-throughput, low-cost, and standardized detection of various complex TCMs for the first time, thereby demonstrating wide applicability and value for the development of quality standards for TCMs.
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Affiliation(s)
- Zidong Qiu
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
- Corresponding author.
| | - Chaofa Wei
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Xiang Li
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Changjiangsheng Lai
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Zhilai Zhan
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Yan Jin
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Li Zhou
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Qingxiu Hao
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Jian Yang
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Shuanglong Wang
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, College of Chemistry, Biology and Material Sciences, East China Institute of Technology, Nanchang, 330013, China
| | - Liping Kang
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
- Corresponding author.
| | - Luqi Huang
- State Key Laboratory of Dao-di Herbs, National Resource Centre for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
- Corresponding author.
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Li J, Cui M, Zhao J, Wang J, Fang X. A self-amplifying plasmid based ultrasensitive biosensor for the detection of As(Ⅲ) in water. Biosens Bioelectron 2022; 221:114937. [DOI: 10.1016/j.bios.2022.114937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 11/24/2022]
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9
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Microwave Plasma Torch Mass Spectrometry for some Rare Earth Elements. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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10
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Zhong Y, Ji M, Hu Y, Li G, Xiao X. Progress of Environmental Sample Preparation for Elemental Analysis. J Chromatogr A 2022; 1681:463458. [DOI: 10.1016/j.chroma.2022.463458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 08/22/2022] [Accepted: 08/29/2022] [Indexed: 10/14/2022]
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Yang L, Sun L, Song J, Zhao X, Pan X, Wu Z, Cai Q. Nano-Coral Gold (NCG) Electrode for Electrochemical Determination of Arsenic (III) in Industrial Wastewater by Square Wave Anodic Stripping Voltammetry (SWASV). ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2066686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Lan Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
| | - Leilei Sun
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
| | - Jie Song
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
| | - Xueliang Zhao
- Center for Hydrogeology and Environment Geology, China Geological Survey, Baoding, China
| | - Xicai Pan
- State Key Lab. of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Zeming Wu
- Inner Mongolia Environmental Monitoring Center, Neimenggu, China
| | - Qingyun Cai
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China
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Li PH, Yang M, Song ZY, Chen SH, Xiao XY, Lin CH, Huang XJ. Highly Sensitive and Stable Determination of As(III) under Near-Neutral Conditions: Benefit from the Synergetic Catalysis of Pt Single Atoms and Active S Atoms over Pt 1/MoS 2. Anal Chem 2021; 93:15115-15123. [PMID: 34714618 DOI: 10.1021/acs.analchem.1c03416] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Designing new catalysts with high activity and stability is crucial for the effective analysis of environmental pollutants under mild conditions. Here, we developed a superior catalyst of Pt single atoms anchored on MoS2 (Pt1/MoS2) to catalyze the determination of As(III). A detection sensitivity of 3.31 μA ppb-1 was obtained in acetate buffer solution at pH 6.0, which is the highest compared with those obtained by other Pt-based nanomaterials currently reported. Pt1/MoS2 exhibited excellent electrochemical stability during the detection process of As(III), even in the coexistence of Cu(II), Pb(II), and Hg(II). X-ray absorption fine structure spectroscopy and theoretical calculations revealed that Pt single atoms were stably fixed by four S atoms and activated the adjacent S atoms. Then, Pt and S atoms synergistically interacted with O and As atoms, respectively, and transferred some electrons to H3AsO3, which change the rate-determining step of H3AsO3 reduction and reduce reaction energy barriers, thereby promoting rapid and efficient accumulation for As(0). Compared with Pt nanoparticles, the weaker interaction between arsenic species and Pt1/MoS2 enabled the effortless regeneration and cyclic utilization of active centers, which is more favorable for the oxidation of As(0). This work provides inspiration for developing highly efficient sensing platforms from the perspective of atomic-level catalysis and affords references to explore the detection mechanism of such contaminants.
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Affiliation(s)
- Pei-Hua Li
- Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid-State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Meng Yang
- Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid-State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Zong-Yin Song
- Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid-State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Shi-Hua Chen
- Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid-State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Xiang-Yu Xiao
- Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid-State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Chu-Hong Lin
- Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid-State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Xing-Jiu Huang
- Key Laboratory of Environmental Optics and Technology, And Environmental Materials and Pollution Control Laboratory, Institute of Solid-State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.,Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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Saleh S, Mohammadnejad S, Khorgooei H, Otadi M. Photooxidation/adsorption of arsenic (III) in aqueous solution over bentonite/ chitosan/TiO 2 heterostructured catalyst. CHEMOSPHERE 2021; 280:130583. [PMID: 33957471 DOI: 10.1016/j.chemosphere.2021.130583] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 04/10/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Arsenic contamination of the environment is a serious health hazard due to its toxicity and carcinogenic effects thus demanding developed and robust removal methodologies. In this study, bentonite/chitosan/titania (BT/CS-TiO2) was developed to boost photo-oxidation/adsorption efficiency while providing a low-cost and potential heterostructured platform for arsenic removal from aqueous media. Under UV irradiation, BT/CS-TiO2 heterostructured exhibited the desired capability (97%) of boosting oxidize toxic AsIII to minor toxic AsV. Results confirmed that •OH radicals available at TiO2 sites under UV light played a critical role in the proposed photo-oxidation process of AsIII. BT/CS exhibited a high adsorption capacity (160 mg g-1) for AsV removal due to its electrostatic interaction and surface complexation. Additionally, BT/CS-TiO2 heterostructured showed satisfactory recyclability with no considerable interferences in the presence of coexisting anions due to the suitability of the valence band position of TiO2 for the oxidation of AsIII as well as the presence of CS into BT layers. Thereby, the findings revealed that impregnation of TiO2 in BT/CS is a promising approach for arsenic removal.
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Affiliation(s)
- Shahin Saleh
- Department of Chemical Engineering, Central Tehran Branch, Islamic Azad university, Iran.
| | - Sepideh Mohammadnejad
- Department of Chemical Engineering, Central Tehran Branch, Islamic Azad university, Iran
| | - Hossein Khorgooei
- Department of Chemical Engineering, Central Tehran Branch, Islamic Azad university, Iran
| | - Maryam Otadi
- Department of Chemical Engineering, Central Tehran Branch, Islamic Azad university, Iran.
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