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Singh D, Verma R, Singh KR, Srivastava M, Singh RP, Singh J. Biogenic synthesis of CuO/ZnO nanocomposite from Bauhinia variegate flower extract for highly sensitive electrochemical detection of vitamin B 2. BIOMATERIALS ADVANCES 2024; 161:213898. [PMID: 38796957 DOI: 10.1016/j.bioadv.2024.213898] [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: 09/14/2023] [Revised: 02/29/2024] [Accepted: 05/15/2024] [Indexed: 05/29/2024]
Abstract
In this study, we report the preparation of bio-inspired binary CuO/ZnO nanocomposite (bb-CuO/ZnO nanocomposite) via the biological route using Bauhinia variegata flower extract following hydrothermal treatment. The prepared bb-CuO/ZnO nanocomposite was electrophoretically deposited (EPD) on indium tin oxide (ITO) substrate to develop bb-CuO/ZnO/ITO biosensing electrode which is employed for the determination of vitamin B2 (Riboflavin) through electrochemical techniques. Physicochemical assets of the prepared bb-CuO/ZnO nanocomposite have been extensively evaluated and make use of different characterization techniques including powder XRD, FT-IR, AFM, SEM, TEM, EDX, XPS, Raman, and TGA. Electrochemical characteristics of the bb-CuO/ZnO/ITO biosensing electrode have been studied towards vitamin B2 determination. Furthermore, different biosensing parameters such as response time, reusability, stability, interference, and real sample analysis were also estimated. From the linear plot of scan rate, charge transfer rate constant (Ks), surface concentration of electrode (γ), and diffusion coefficient (D) have been calculated, and these are found to be 6.56 × 10-1 s-1, 1.21 × 10-7 mol cm-2, and 6.99 × 10-3 cm2 s-1, respectively. This biosensor exhibits the linear range of vitamin B2 detection from 1 to 40 μM, including sensitivity and limit of detection (LOD) of 1.37 × 10-3 mA/μM cm2 and 0.254 μM, respectively. For higher concentration range detection linearity is 50-100 μM, with sensitivity and the LOD of 1.26 × 10-3 mA/μM cm2 and 0.145 μM, respectively. The results indicate that the bio-inspired nanomaterials are promising sustainable biosensing platforms for various food and health-based biosensing devices.
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Affiliation(s)
- Diksha Singh
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Rahul Verma
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Kshitij Rb Singh
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Manish Srivastava
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU) Varanasi, Uttar Pradesh 221005, India; Saveetha Institute of Medical and Technical Sciences, (Deemed to be University), Chennai, 600077, India
| | - Ravindra Pratap Singh
- Department of Biotechnology, Faculty of Science, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh 484887, India
| | - Jay Singh
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India.
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Zhang L, Wen X, Ming Q, Luo X, He T, Chen T, Jiang M, Wang M, Ma L. One-Step Prepared Multifunctional Polyacrylonitrile/MIL-100(Fe) Membrane with High-Density Porous Fibers for Efficient Dye/Oil Wastewater Remediation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6550-6561. [PMID: 38483322 DOI: 10.1021/acs.langmuir.4c00230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
With environmental pollution becoming more serious, developing efficient treatment technologies for all kinds of organic wastewater has become the focus of current research. In this work, the coaxial electrospinning technology was used to one-step fabricate a porous and underwater superoleophobic polyacrylonitrile nanofibrous membrane with an Fe-based metal-organic framework (MIL-100(Fe)). Benefiting from the synergistic effect of two jets, the nanofibers are smaller and denser, which prompt the exposure of more nanomaterial additives (MIL-100(Fe)). The BET surface area increased to 202.888 m2/g, and the membranes demonstrated outstanding underwater superoleophobicity. Moreover, compared with traditional blended matrix membranes by the single-axis method, separation of the modifier and membrane matrix material by coaxial methods also maintained excellent mechanical properties, which enhanced Young's modulus 3.4 times (∼1.34 MPa). As a result, facing soluble dyes, the porous C-PAN/MIL-100(Fe) membrane can demonstrate outstanding and fast adsorptive property (the Qm of MB and CR reached 44.71 and 88.74 mg g-1, respectively). For oily emulsion, the hydrophilic and oleophobic nanofibrous reticular surface provided excellent separation performance (flux: 1124.0-1549.3 L m-2 h-1, R > 98%). Moreover, the porous and underwater superoleophobic C-PAN/MIL-100(Fe)-0.5 membrane can synchronously purify the dye/oil mixture emulsions by one-step filtration. Based on the above performance, we believe that the modified nanofibrous membrane prepared by one-step coaxial electrospinning technology can promote more studies of the development of membrane preparation technology in the field of oily wastewater treatment.
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Affiliation(s)
- Liyun Zhang
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Xin Wen
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Qingxia Ming
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Xue Luo
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Tianfeng He
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Tian Chen
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Minghang Jiang
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Mengjun Wang
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
| | - Lan Ma
- School of Science, Xihua University, Jinzhou Road, Chengdu, Sichuan 610039, P. R. China
- State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan 610500, P. R. China
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CuO/ZnO/CQDs@PAN Nanocomposites with Ternary Heterostructures for Enhancing Photocatalytic Performance. Catalysts 2023. [DOI: 10.3390/catal13010110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Photocatalysis is a green technology. In this paper, CuO/ZnO/carbon quantum dots (CQDs)@PAN nanocomposites with ternary heterostructures (CZC@PAN)—as high-performance environmentally friendly nanophotocatalysts—were prepared by electrospinning, heat treatment, and hydrothermal synthesis in sequence, and their practical applications were investigated by degrading methylene blue (MB). The synergistic effects of components in ternary heterostructures on the morphology, structure, and photocatalytic performance of CZC@PAN were analyzed, and their photocatalytic mechanism was further discussed. The results showed that due to the formation of p-n heterojunctions and the loading of CQDs and CZC@PAN had excellent photocatalytic degradation performance, and its photocatalytic degradation rate for MB reached 99.56% under natural sunlight for 4 h.
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Synthesis and characterization of multi-responsive poly(N-isopropylacrylamide)-sodium alginate-graphene oxide composite hydrogels. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04581-9] [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]
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Application of ZnO Semiconductor Nanomaterial Ink in Packaging and Printing Design. J CHEM-NY 2022. [DOI: 10.1155/2022/6166533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In order to obtain a flat and clear packaging printing pattern, the author proposes a printing method based on ZnO semiconductor nanomaterial ink. The method uses zinc acetate dihydrate as raw material, ethylenediamine as a complexing agent, absolute ethanol as a solvent, and ethyl cellulose as an auxiliary agent to prepare particle-free ZnO functional ink. The ink was spin-coated on a glass substrate, cured at different temperatures on a heating plate for 30 min, and passed through an X-ray diffractometer, a field emission scanning electron microscope, an infrared spectrometer, a synchronous thermal analyzer, an ultraviolet-visible spectrophotometer, and a transmission electron microscopy were used to characterize the synthesized inks and the resulting films. Experiments show that the decomposition temperature of particle-free ZnO conductive ink is much lower than that of zinc acetate precursor; the film cured at 300°C for 30 min has a smooth surface, uniform particle size, good crystallinity, and transmittance of up to 80%. After inkjet printing on the PI flexible substrate, after curing at 300°C for 30 min, the pattern surface is smooth and clear, and the outline is clear. Conclusion. The printing method is based on ZnO semiconductor nanomaterial ink. It has good application prospects in packaging and printing design.
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Decorating of Ag and CuO on ZnO Nanowires by Plasma Electrolyte Oxidation Method for Enhanced Photocatalytic Efficiency. Catalysts 2022. [DOI: 10.3390/catal12070801] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
In this work, photocatalytic performance is divulged in the ternary CuO-Ag-ZnO nanowire synthesized via a two-step approach. The decoration of Ag and CuO nanostructures onto the surface of ZnO nanowires was simply carried out by using the plasma electrolytic oxidation method in a short time. The structure, size, morphology, and optical properties of as-prepared samples were characterized by X-ray diffraction, field-emission scanning electron microscopy, and spectrophotometry measurements. The diameters of Ag nanoparticles and ZnO nanoflowers are in the range of 5–20 nm and 20–60 nm, respectively. Within the first 15 min, methyl orange was decolorized 96.3 and 82.8% in the CuO-Ag-ZnO and Ag-ZnO, respectively, and there is only about 46.7% of that decomposed in pure ZnO. The CuO-Ag-ZnO shows a higher rate constant k = 0.2007 min−1 and a lower half-life time t = 6.1 min compared to Ag-ZnO and bare ZnO nanowires. The photo-reusability of the ternary nanostructures was estimated to be much outweighed compared to ZnO nanowires. Interestingly, the synergic incorporation between noble metal–semiconductor or semiconductor–semiconductor in the interfaces of Ag-CuO, Ag-ZnO, and CuO-ZnO expands the visible light absorption range and eliminates the photogenerated electron–hole recombination, resulting in a superior visible-light-driven photocatalyst.
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Gnanasekaran L, Santhamoorthy M, Naushad M, ALOthman ZA, Soto-Moscoso M, Show PL, Khoo KS. Photocatalytic removal of food colorant using NiO/CuO heterojunction nanomaterials. Food Chem Toxicol 2022; 167:113277. [DOI: 10.1016/j.fct.2022.113277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/26/2022] [Accepted: 07/03/2022] [Indexed: 10/17/2022]
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Chen Z, Zhang T, Zhao X, Zhang XL, Wang D, Wei S. The Contribution of the Spatial Restriction for Improvement of Hydrogenation and Water‐tolerant for Cu/SiO
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Catalysts by Varied Pores of Support. ChemistrySelect 2021. [DOI: 10.1002/slct.202103826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Zheng Chen
- College of Chemistry Chemical Engineering and Materials Science Zaozhuang University Zaozhuang 277160 Shandong China
| | - Tao Zhang
- Shandong Zhongshi Yitong Group Co. LTD Jinan 250002 P.R. China
| | - Xueying Zhao
- College of Chemistry Chemical Engineering and Materials Science Zaozhuang University Zaozhuang 277160 Shandong China
| | - Xuelan L. Zhang
- College of Chemistry Chemical Engineering and Materials Science Zaozhuang University Zaozhuang 277160 Shandong China
| | - Dengfeng Wang
- College of Chemistry Chemical Engineering and Materials Science Zaozhuang University Zaozhuang 277160 Shandong China
| | - Shuwei Wei
- College of Chemistry Chemical Engineering and Materials Science Zaozhuang University Zaozhuang 277160 Shandong China
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