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Zheng J, Liu D, Liu X, Wang Z, Li J, Wang X, Wang J, Fu Q, Cao Y, Jiang L, Chen Y. Ag/ZnO microcavities with high sensitivity and self-cleaning properties for fast repetitive SERS detection. Phys Chem Chem Phys 2024; 26:17083-17089. [PMID: 38842138 DOI: 10.1039/d4cp01325e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
A SERS substrate with high sensitivity and reusability was proposed. The chip consists of multiple ZnO microcavities loaded with silver particles. Based on structural characteristics, this coupling between cavity modes and localized surface plasmon modes can highly localize the electric field, where experimental results revealed a detection limit of 10-11 M for R6G. In addition, during carrier control in semiconductors with localized electromagnetic fields, our substrate also exhibits high self-cleaning efficiency and in situ detection stability. Even in a dry environment, it exhibits excellent light-mediated cleaning ability across multiple reuse test cycles. The convenient, rinse-free substrate, with its cost-effective and sustainable features, shows great promise for the study on detection and degradation of active materials.
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Affiliation(s)
- Jiale Zheng
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Dongliang Liu
- School of Science, Xi'an Polytechnic University, 19 Jinhua South Road, Xi'an 710048, China
| | - Xilong Liu
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Zekai Wang
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Junfeng Li
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Xinxin Wang
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Jun Wang
- School of Science, Xi'an Polytechnic University, 19 Jinhua South Road, Xi'an 710048, China
| | - Qiang Fu
- Department of Optoelectronic Information Science and Engineering, School of Physics and Materials Engineering, Hefei Normal University, Hefei 230601, China
| | - Yanqiang Cao
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Liyong Jiang
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Yikai Chen
- School of Physics, Nanjing University of Science and Technology, Nanjing, 210094, China.
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Nanjing, 210094, China
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Hou Y, Feng H, He J, Meng F, Sun J, Li X, Wang X, Su Z, Sun C. Terbium alginate encapsulated CsPbI 3@Pb-MOF: a ratiometric fluorescent bead for detection and adsorption of Fe 3. Dalton Trans 2024; 53:2541-2550. [PMID: 38234224 DOI: 10.1039/d3dt04187e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Halide perovskite nanocrystals are innovative luminescent materials for fluorescent probes with high quantum yield and narrow emission bandwidth. However, the limited stability, single-signal response, and separation challenges obstruct their widespread use in water ion detection. Herein, a ratiometric fluorescence sensor based on terbium alginate gel beads (green fluorescent, namely Tb-AG) embedded with powdered CsPbI3@Pb-MOF (red fluorescent) was prepared for fluorescent determination and adsorption of Fe3+. Pb-MOF's protection notably enhances the water stability of CsPbI3, while the energy transfer between CsPbI3@Pb-MOF and Tb3+ elevates the optical performance of CsPbI3@Pb-MOF@Tb-AG. Significantly, Fe3+ markedly suppresses CsPbI3@Pb-MOF red fluorescence at 647 nm, while not noticeably affecting Tb-AG green emission at 528 nm. The sensor exhibited a strong linear response to Fe3+ concentrations ranging from 0 to 90 μM, with a detection limit of 0.44 μM and high selectivity. The CsPbI3@Pb-MOF@Tb-AG-based sensor has been effectively validated through its successful use in detecting Fe3+ in tap and river water samples. Furthermore, CsPbI3@Pb-MOF@Tb-AG demonstrates a notable adsorption capacity of 325.4 mg g-1 Fe3+. Finally, the mechanism of Fe3+ detection and adsorption was determined.
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Affiliation(s)
- Yangwen Hou
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022 Jilin, China
| | - Hua Feng
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Jingting He
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, 130022 Jilin, China
| | - Fanfei Meng
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Jing Sun
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Xiao Li
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
| | - Xinlong Wang
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024 Jilin, China.
| | - Zhongmin Su
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology Changchun, Changchun, 130022 Jilin, China.
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021 Jilin, China
| | - Chunyi Sun
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024 Jilin, China.
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Wei Q, Lu B, Yang Q, Shi C, Wei Y, Xu M, Zhang C, Yuan Y. MoS 2/Au Heterojunction Catalyst for SERS Monitoring of a Fenton-like Reaction. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1169. [PMID: 36770175 PMCID: PMC9920604 DOI: 10.3390/ma16031169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/18/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
Fenton technology is one of advanced oxidation process (AOP) methods to treat wastewater through chemical oxidation. Due to the limitations of classical iron-based catalysts, it is still challenging to find suitable catalysts for Fenton-like reactions. Here, MoS2/Au heterojunctions were successfully synthesized by reduction of chloroauric acid in the solution of layered MoS2 prepared by hydrothermal method. As a model molecule, methylene blue (MB) was used as the species to be degraded to evaluate the performance of the catalyst. It was determined by UV-visible spectra that the optimal catalyst can be obtained when MoS2 (mg): HAuCl4 (wt. % mL) is 2:2. The Fenton-like reaction process was monitored by introducing highly sensitive surface enhanced Raman spectroscopy (SERS). The results show that MB can be degraded by 83% in the first 10 min of the reaction, indicating that MoS2/Au has good catalytic performance. In addition, as a fingerprint spectrum, SERS was used to preliminarily analyze the molecular structure changes during the degradation process. The result showed that C-N-C bond was easier to break than the C-S-C bond. NH2 group and the fused ring were destroyed at the comparable speed at the first 30 min. In terms of application applicability, it was showed that MB degradation had exceeded 95% at all the three pH values of 1.4, 5.0, and 11.1 after the reaction was carried out for 20 min. The test and analysis of the light environment showed that the catalytic efficiency was significantly improved in the natural light of the laboratory compared to dark conditions. The possible mechanism based on ·OH and ·O2- from ESR data was proposed. In addition, it was demonstrated to be a first-order reaction from the perspective of kinetics. This study made a positive contribution to broaden of the applicable conditions and scope of Fenton-like reaction catalysts. It is expected to be used as a non-iron catalyst in practical industrial applications. From the perspective of detection method, we expect to develop SERS as a powerful tool for the in situ monitoring of Fenton-like reactions, and to further deepen our understanding of the mechanism.
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Affiliation(s)
- Qian Wei
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Beibei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Qing Yang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Can Shi
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yulan Wei
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Minmin Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, Soochow University, Suzhou 215123, China
| | - Chenjie Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yaxian Yuan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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Tian Y, Tang X, Fu Y, Shang S, Dong G, Li T, Huang X, Zhu D. Simultaneous extraction and surface enhanced Raman spectroscopy detection for the rapid and reliable identification of nicotine released from snus products. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:5608-5616. [PMID: 34806734 DOI: 10.1039/d1ay01601f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surface enhanced Raman spectroscopy (SERS) is a highly sensitive analytical detection technique that provides unique chemical and structural information on target molecules. Here, simultaneous extraction and SERS detection of nicotine for the rapid and reliable identification of nicotine released from snus products were performed based on a nano-Au assembly hierarchy structure in the capillary. Based on this strategy, the time evolution of the concentrations of nicotine released from the snus products was measured. Through comparison of the intensities of the spectral peaks of the symmetrical breathing of the pyridine moiety of nicotine molecules, with the prolongation of time, the concentration of nicotine released decreased significantly, which is helpful for establishing a method for the rapid evaluation of the processing and selection of excipients of snus products, and provides a new idea for further study of the production of snus pouches and related tobacco products. Moreover, based on data fitting, it can be calculated that the concentration of nicotine in the extraction presented an obvious quadratic relationship with time, and the release of most of the nicotine in the snus pouch, which is held through the gums and palate, was basically completed after ∼15 min. Such destruction-free simultaneous measurements of snus products are opening up new perspectives for further research about the impact of nicotinoids on smokers' health and cessation programs.
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Affiliation(s)
- Yongfeng Tian
- Yunnan Key Laboratory of Tobacco Chemistry, Technology Center of China Tobacco Yunnan Industrial Co., Ltd, Kunming 650231, China.
| | - Xianghu Tang
- Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.
- University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yaning Fu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
| | - Shanzhai Shang
- Yunnan Key Laboratory of Tobacco Chemistry, Technology Center of China Tobacco Yunnan Industrial Co., Ltd, Kunming 650231, China.
| | - Gaofeng Dong
- Yunnan Key Laboratory of Tobacco Chemistry, Technology Center of China Tobacco Yunnan Industrial Co., Ltd, Kunming 650231, China.
| | - Tinghua Li
- Yunnan Key Laboratory of Tobacco Chemistry, Technology Center of China Tobacco Yunnan Industrial Co., Ltd, Kunming 650231, China.
| | - Xingjiu Huang
- Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.
- University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Donglai Zhu
- Yunnan Key Laboratory of Tobacco Chemistry, Technology Center of China Tobacco Yunnan Industrial Co., Ltd, Kunming 650231, China.
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Qiu ZD, Zhang X, Wei XY, Chingin K, Xu JQ, Gao W, Yang B, Wang SL, Tan T, Liu EH, Xu HY, Cui GH, Guo J, Wang YN, Shen Y, Zhao YJ, Chen HW, Lai CJS, Huang LQ. Online discovery of the molecular mechanism for directionally detoxification of Fuzi using real-time extractive electrospray ionization mass spectrometry. JOURNAL OF ETHNOPHARMACOLOGY 2021; 277:114216. [PMID: 34044076 DOI: 10.1016/j.jep.2021.114216] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/14/2021] [Accepted: 05/15/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Aconitum carmichaelii Debeaux, a famous traditional medicinal herb for collapse, rheumatic fever, and painful joints, always raises global concerns about its fatal toxicity from toxic alkaloids when improperly processed. Therefore, it is urgent to clarify the internal molecular mechanism of processing detoxification on Aconitum and develop simple and reliable approaches for clinical application, which is also of great significance to the rational medicinal use of Aconitum. AIM OF THE STUDY The study aimed at developing a complete molecular mechanism exploration strategy in complex medicinal herb decocting system, clarifying the internal molecular mechanism of processing detoxification on Aconitum, and exploring valid approaches for detoxification. MATERIALS AND METHODS Aconiti Lateralis Radix Praeparata (Fuzi) was selected as the model for exploring the complex Aconitum detoxification mechanism using an advanced online real-time platform based on extractive electrospray ionization mass spectrometry. The methods realized the sensitive capture of dynamic trace intermediates, accurate qualitative and quantitative analysis, and real-time and long-term monitoring of multi-components with satisfactory accuracy and resistance to complex matrices. RESULTS Components in the complex Aconitum decocting system were real-timely characterized and fat meat was discovered and verified to directionally detoxify Aconitum while reserving the therapy effect. More importantly, the dynamic detoxification mechanism in the chemically complex Aconitum decoction was molecularly profiled. A novel reaction pathway based on nucleophilic substitution reaction mechanism was proposed. As confirmed by the theoretic calculations at DFT B3LYP/6-31G (d) levels, fatty acids (e.g., palmitic acid) acted as a green, cheap, and high-performance catalyst and promote the decomposition of toxic diester alkaloids to non-toxic and active benzoyl-monoester alkaloids through the discovered mechanism. CONCLUSION The study exposed a novel detoxification molecular mechanism of Aconitum and provided an effective method for the safe use of Aconitum, which could effectively guide the development of traditional processing technology and compatibility regulation of the toxic herb and had great value to the modernization and standardization development of traditional medicine.
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Affiliation(s)
- Zi-Dong Qiu
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Xiaoping Zhang
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, College of Chemistry, Biology and Material Sciences, East China Institute of Technology, Nanchang, 330013, PR China
| | - Xu-Ya Wei
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Konstantin Chingin
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, College of Chemistry, Biology and Material Sciences, East China Institute of Technology, Nanchang, 330013, PR China
| | - Jia-Quan Xu
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, College of Chemistry, Biology and Material Sciences, East China Institute of Technology, Nanchang, 330013, PR China
| | - Wei Gao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, PR China
| | - Bin Yang
- Institute of Chinese Materia Medical, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Shuang-Long Wang
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, College of Chemistry, Biology and Material Sciences, East China Institute of Technology, Nanchang, 330013, PR China
| | - Ting Tan
- The National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, PR China
| | - E-Hu Liu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, PR China
| | - Hai-Yu Xu
- Institute of Chinese Materia Medical, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Guang-Hong Cui
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Juan Guo
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Ya-Nan Wang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Ye Shen
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Yu-Jun Zhao
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China
| | - Huan-Wen Chen
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, College of Chemistry, Biology and Material Sciences, East China Institute of Technology, Nanchang, 330013, PR China.
| | - Chang-Jiang-Sheng Lai
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China.
| | - Lu-Qi Huang
- State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, PR China.
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Murugan E, Santhoshkumar S, Govindaraju S, Palanichamy M. Silver nanoparticles decorated g-C 3N 4: An efficient SERS substrate for monitoring catalytic reduction and selective Hg 2+ions detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:119036. [PMID: 33070011 DOI: 10.1016/j.saa.2020.119036] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/02/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Graphitic carbon nitride supported Ag NPs(AgNPs@g-C3N4) were synthesized by an in-situ chemical reduction using a green reducing agent, tannic acid. They were characterized by UV-Vis, FTIR, XPS, XRD, FESEM, EDAX and HRTEM. They were very much SERS sensitive, and capable of detecting methylene blue and 4-aminothiophenol at 1 × 10-12 M and 1 × 10-10 M, respectively with the corresponding SERS enhancement factor of 1.4 × 108 and 4.7 × 107. Apart from its high SERS sensitivity, it exhibited high catalytic activity for the reduction of MB with NaBH4. So, their SERS activity and catalytic activity were combined successfully to monitor catalytic reduction of MB by SERS technique. Further, the SERS activity towards MB was also employed for the detection/quantification of free Hg2+ ions in aqueous solution. The SERS intensity of MB drastically decreased in the presence of Hg2+ ions, and hence it provides novel route to detect and quantify the latter. Presence of Ca2+, Mg2+, Cu2+ and Cd2+ions showed zero interference for it. So, this study proves that Ag NPs@g-C3N4 as a unique substrate for multiple SERS applications.
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Affiliation(s)
- E Murugan
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India.
| | - S Santhoshkumar
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
| | - S Govindaraju
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
| | - M Palanichamy
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
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Cheng Y, Wang W, Yao L, Wang J, Han H, Zhu T, Liang Y, Fu J, Wang Y. 3D Ag/ZnO microsphere SERS substrate with ultra-sensitive, recyclable and self-cleaning performances: application for rapid in site monitoring catalytic dye degradation and insight into the mechanism. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125507] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Wu M, Li P, Zhu Q, Wu M, Li H, Lu F. Functional paper-based SERS substrate for rapid and sensitive detection of Sudan dyes in herbal medicine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 196:110-116. [PMID: 29438940 DOI: 10.1016/j.saa.2018.02.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 10/30/2017] [Accepted: 02/05/2018] [Indexed: 06/08/2023]
Abstract
There has been an increasing demand for rapid and sensitive techniques for the identification of Sudan compounds that emerged as the most often illegally added fat-soluble dyes in herbal medicine. In this report, we have designed and fabricated a functionalized filter paper consisting of gold nanorods (GNRs) and mono-6-thio-cyclodextrin (HS-β-CD) as a surface-enhanced Raman spectroscopy (SERS) substrate, in which the GNR provides sufficient SERS enhancement, and the HS-β-CD with strong chemical affinity toward GNR provides the inclusion compound to capture hydrophobic molecules. Moreover, the CD-GNR were uniformly assembled on filter paper cellulose through the electrostatic adsorption and hydrogen bond, so that the CD-GNR paper-based SERS substrate (CD-GNR-paper) demonstrated higher sensitivity for the determination of Sudan III (0.1μM) and Sudan IV (0.5μM) than GNRs paper-based SERS substrate (GNR-paper), with high stability after the storage in the open air for 90days. Importantly, CD-GNR-paper can effectively collect the Sudan dyes from illegally adulterated onto samples of Resina Draconis with a simple operation, further open up new exciting opportunity for SERS detection of more compounds illegally added with high sensitivity and fast signal responses.
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Affiliation(s)
- Mianmian Wu
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China; School of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou 350108, China
| | - Pan Li
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China
| | - Qingxia Zhu
- Department of Pharmacy, Shanghai 9th People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai 200011, China
| | - Meiran Wu
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Hao Li
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Feng Lu
- Department of Pharmaceutical Analysis, School of Pharmacy, Second Military Medical University, Shanghai 200433, China.
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