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Ma X, Deng L, Zou Z, Pan Z, Feng L, Huang Z, Liang Z, Liu X, Li M, Su Z, Zheng H. Novel portable photoelectrochemical sensor based on CdS/Au/TiO 2 nanotube arrays for sensitive, non-invasive, and instantaneous uric acid detection in saliva. Talanta 2024; 271:125646. [PMID: 38218058 DOI: 10.1016/j.talanta.2024.125646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 01/04/2024] [Accepted: 01/06/2024] [Indexed: 01/15/2024]
Abstract
Uric acid (UA) monitoring is the most effective method for diagnosis and treatment of gout, hyperuricemia, hypertension, and other diseases. However, challenges remain regarding detection efficiency and rapid on-site detection. Here, we first synthesized a CdS/Au/TiO2-NTAs Z-scheme heterojunction material using a titanium dioxide nanotube array (TiO2-NTAs) as the substrate and modified with gold nanoparticles (Au) and cadmium sulfide particles (CdS). This material achieves bandgap alignment to generate a large number of electron-hole pairs under illumination. Then, using CdS/Au/TiO2-NTAs as the working electrode and molecularly imprinted polymers (MIP) as the recognition unit, we constructed a portable photoelectrochemical (PEC) sensor for non-invasive instant detection of UA concentration in human saliva, which has unique advantages in the field of high-sensitivity PEC instant detection. The portable MIP-PEC sensor achieves a linear range of 0.01-50 μM and a detection limit as low as 5.07 nM (S/N = 3). At the same time, the portable MIP-PEC sensor exhibits excellent sensitivity, specificity as well as stability, and shows no statistically significant difference compared to traditional high-performance liquid chromatography (HPLC) in practical sample detection. Compared to traditional PEC modes, this work demonstrates a novel and universal method for high-sensitivity instant detection in the field of PEC.
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Affiliation(s)
- Xiaolong Ma
- Institute of Life Sciences, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Lijun Deng
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Ziwei Zou
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Ziping Pan
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Linlin Feng
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Zheng Huang
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Zhenwu Liang
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Xinli Liu
- Institute of Life Sciences, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China
| | - Mei Li
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China.
| | - Zhiheng Su
- Pharmaceutical College, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China.
| | - Hua Zheng
- Institute of Life Sciences, Guangxi Medical University, No. 22 Shuang Yong Road, Qingxiu District, Nanning, 530021, China.
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Kumaravel S, Chandrasatheesh C, Palanisamy G, Lee J, Hasan I, Kumaravel S, Avula B, Pongiya UD, Balu K. Highly Efficient Solar-Light-Active Ag-Decorated g-C 3N 4 Composite Photocatalysts for the Degradation of Methyl Orange Dye. MICROMACHINES 2023; 14:1454. [PMID: 37512765 PMCID: PMC10383219 DOI: 10.3390/mi14071454] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023]
Abstract
In this study, we utilized calcination and simple impregnation methods to successfully fabricate bare g-C3N4 (GCN) and x% Ag/g-C3N4 (x% AgGCN) composite photocatalysts with various weight percentages (x = 1, 3, 5, and 7 wt.%). The synthesized bare and composite photocatalysts were analyzed to illustrate their phase formation, functional group, morphology, and optical properties utilizing XRD, FT-IR, UV-Vis DRS, PL, FE-SEM, and the EDS. The photodegradation rate of MO under solar light irradiation was measured, and the 5% AgGCN composite photocatalyst showed higher photocatalytic activity (99%), which is very high compared to other bare and composite photocatalysts. The MO dye degradation rate constant with the 5% AgGCN photocatalyst exhibits 14.83 times better photocatalytic activity compared to the bare GCN catalyst. This photocatalyst showed good efficiency in the degradation of MO dye and demonstrated cycling stability even in the 5th successive photocatalytic reaction cycle. The higher photocatalytic activity of the 5% AgGCN composite catalyst for the degradation of MO dye is due to the interaction of Ag with GCN and the localized surface plasmon resonance (SPR) effect of Ag. The scavenger study results indicate that O2●- radicals play a major role in MO dye degradation. A possible charge-transfer mechanism is proposed to explain the solar-light-driven photocatalyst of GCN.
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Affiliation(s)
- Sakthivel Kumaravel
- Department of Environmental Engineering, Korea Maritime and Ocean University, Busan 49112, Republic of Korea
| | | | - Govindasamy Palanisamy
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea
| | - Imran Hasan
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Saranraj Kumaravel
- Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Balakrishna Avula
- Department of Chemistry, Rajeev Gandhi Memorial College of Engineering and Technology (Autonomous), Nandyal 518501, Andhra Pradesh, India
| | - Uma Devi Pongiya
- Department of Biochemistry, Dhanalakshmi Srinivasan College of Arts and Science for Women (Autonomous), Perambalur 621212, Tamil Nadu, India
| | - Krishnakumar Balu
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, E.T.S. de Ingenieros, Universidad de Sevilla, Avda. Camino de los Descubrimientos s/n., 41092 Sevilla, Spain
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 602105, Tamil Nadu, India
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