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Structural and Morphological Studies of V2O5/MWCNTs and ZrO2/MWCNTs Composites as Photocatalysts. J CHEM-NY 2021. [DOI: 10.1155/2021/9922726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The present study outlines the synthesis of transition metal oxide- (TMO-) multiwall carbon nanotubes- (MWCNTs-) based composites for photocatalytic application. MWCNTs were functionalized/purified by treating with H2SO4 and HNO3 to improve their dispersion in water. The TMOs (ZrO2, V2O5) were decorated on MWCNTs by the hydrothermal method to yield V2O5/MWCNTs and ZrO2/MWCNTs composites. Subsequently, these composites were characterized for their structural/morphological studies by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Photocatalytic activities of TMO/MWCNTs composites were investigated by degradation phenomenon of methylene blue (MB) dye in aqueous solution. It was observed that the prepared composites best performed in the presence of H2O2 under ultraviolet irradiation. The maximum observed degradation efficiencies for ZrO2/MWCNTs and V2O5/MWCNTs were 49% and 96%, respectively.
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Rong S, Pan D, Li X, Gao M, Yu H, Jiang J, Zhang Z, Zeng D, Pan H, Chang D. Highly Sensitive Chitosan and ZrO2 Nanoparticles-Based Electrochemical Sensor for 8-Hydroxy-2’-deoxyguanosine Determination. CURR ANAL CHEM 2019. [DOI: 10.2174/1573411014666180501153300] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background:
8-Hydroxy-2’-deoxyguanosine (8-OHdG) has been regarded as a typical stable
biomarker of DNA oxidative damage, and its level is one of the criteria for early diagnosis of various
diseases. Considering the significance of 8-OhdG, various analytical techniques have been used for
assaying 8-OHdG but all of them suffer from basic limitations like highly expensive instrumentation,
large amount of sample requirement, complicated sample pre-treatment, tedious and time-consuming
procedures etc. However, electroanalytical sensors provide a faster, easy and sensitive means of
analyzing.
Methods:
The chitosan (CS) film provided the high electrode activity and stability which is required for
detecting 8-OHdG though direct electrochemical oxidation. Zirconia was employed because it has some
unique properties, such as high redox activity and selectivity etc. High-performance composite was
easily detected by differential pulse voltammetry at a working voltage of 0. 51 V (vs. Ag/AgCl). A rapid
and sensitive electrochemical sensor based on CS and metal oxide nanocrystalline for the determination
of 8-OHdG was established.
Results:
Under optimized experimental conditions, the peak currents of differential pulse voltammetry
increased as the concentrations of 8-OHdG increased from 10 to 200 ng·mL-1. The detection limit was
3.67 ng·mL-1 which was calculated by the S/N ratio of 3. The recoveries of the real spiked samples are
in the range between 93.2 to 105.3%.
Conclusion:
The electrochemical sensor for direct 8-OHdG determination using a new CS/zirconia
composite for GCE modification was developed and showed excellent reproducibility, stability and
sensitivity for the specific determination of 8-OHdG in real urine specimen.
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Affiliation(s)
- Shengzhong Rong
- Public Health School, Mudanjiang Medical College, Mudanjiang, Heilongjiang, 157011, China
| | - Deng Pan
- Medical School, Southeast University, Nanjing 210009, China
| | - Xuehui Li
- College of Public Administration, Nanjing Agricultural University Nanjing 210095, China
| | - Mucong Gao
- Public health school, Harbin Medical University, Harbin, Heilongjiang, 150081, China
| | - Hongwei Yu
- Department of Clinical Laboratory, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399, China
| | - Jinghui Jiang
- Clinical Laboratory, the First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Ze Zhang
- Department of Clinical Laboratory, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399, China
| | - Dongdong Zeng
- Cooperation Study Center, School of Medicine and Technology, Shanghai University of Medical & Health Sciences, Shanghai, 201318, China
| | - Hongzhi Pan
- Cooperation Study Center, School of Medicine and Technology, Shanghai University of Medical & Health Sciences, Shanghai, 201318, China
| | - Dong Chang
- Department of Clinical Laboratory, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399, China
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Murugan N, Kumar THV, Devi NR, Sundramoorthy AK. A flower-structured MoS2-decorated f-MWCNTs/ZnO hybrid nanocomposite-modified sensor for the selective electrochemical detection of vitamin C. NEW J CHEM 2019. [DOI: 10.1039/c9nj02993a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We synthesized an MoS2/f-MWCNTs/ZnO composite and successfully used it to prepare an electrochemical sensor for the selective detection of AA in blood serum samples.
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Affiliation(s)
- N. Murugan
- Department of Chemistry
- SRM Institute of Science and Technology
- India
| | | | - N. Ramila Devi
- Department of Chemistry
- SRM Institute of Science and Technology
- India
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Puangjan A, Chaiyasith S, Taweeporngitgul W, Keawtep J. Application of functionalized multi-walled carbon nanotubes supporting cuprous oxide and silver oxide composite catalyst on copper substrate for simultaneous detection of vitamin B2, vitamin B6 and ascorbic acid. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:383-397. [DOI: 10.1016/j.msec.2017.03.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 12/31/2016] [Accepted: 03/04/2017] [Indexed: 02/01/2023]
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Baytak AK, Teker T, Duzmen S, Aslanoglu M. A sensitive determination of terbutaline in pharmaceuticals and urine samples using a composite electrode based on zirconium oxide nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:125-131. [DOI: 10.1016/j.msec.2016.05.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 04/02/2016] [Accepted: 05/03/2016] [Indexed: 11/25/2022]
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