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Pal S, Mahamiya V, Ray P, Sarkar A, Sultana F, Adhikary B, Chakraborty B, Show B. β-Bi 2O 3-Bi 2WO 6 Nanocomposite Ornated with meso-Tetraphenylporphyrin: Interfacial Electrochemistry and Photoresponsive Detection of Nanomolar Hexavalent Cr. Inorg Chem 2023; 62:21201-21223. [PMID: 38078695 DOI: 10.1021/acs.inorgchem.3c03213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
Hexavalent chromium exposure via inhalation, ingestion, or both has been proven to adversely affect internal organs, induce toxic effects, cause allergies, and contribute to the development of cancer. It requires a substantial and challenging effort to detect several heavy metal ions conveniently, sensitively, and reliably by using materials that are easy to synthesize and have a high yield. The impact of light on the electrocatalytic oxidation/reduction process proves an environmentally friendly methodology with numerous applications in pollution control. The extensive use of photoactive materials in photoelectrochemical (PEC) sensors necessitates the development of stable and highly effective photoactive materials. Hence, the solvothermal synthesis of the organic-inorganic hybrid nanocomposite β-Bi2O3-Bi2WO6/H2TPP with varying weight percentages of meso-tetraphenylporphyrin (H2TPP) resulted in a selective electrode for electrocatalytic and photoelectrocatalytic reduction of Cr6+ on fluorine-doped tin oxide (FTO) by an adsorption-reduction mechanism. H2TPP increases the active site density and provides an effective surface area for efficient adsorption by providing both pyridinic- and pyrrolic-N atoms to β-Bi2O3-Bi2WO6/H2TPP. H2TPP could effectively adsorb Cr6+ in the β-Bi2O3-Bi2WO6/H2TPP composite system through electrostatic interaction, and the adsorbed Cr6+ ions were reduced to trivalent chromium Cr3+, resulting in promising Cr6+ sensing. The projected density of states and Bader charge calculations result in the electrostatic attraction among the N-2p orbital of H2TPP and the 3d and 4s orbitals of the Cr atom, resulting in the adsorption of the hexavalent Cr atom onto the active center of H2TPP. Moreover, the addition of H2TPP results in the development of a mesoporous surface that offers strong electrical conductivity, a substantial surface area, improved charge-mass transport, intimate contact between the electrolyte and catalyst, an extended fluorescence lifetime, and increased stability. The role of pH values was thoroughly investigated. All electrochemical and photoelectrochemical studies were carried out on 5 wt % H2TPP-ornated β-Bi2O3-Bi2WO6. Nanocomposite β-Bi2O3-Bi2WO6/5 wt % H2TPP demonstrated reliable cyclic stability, reproducibility, good sensitivity (8.005 μA mM cm-2), and a low limit of detection (LOD) (8.0 nM) toward photoelectrocatalytic reduction of Cr6+. The interference study in the presence of a few inorganic entities exhibited excellent selectivity. This tale amplification approach for developing a β-Bi2O3-Bi2WO6/5 wt % H2TPP nanocomposite system suggests a deeper understanding of the application of photoelectrocatalytic reduction of Cr6+ in environmental remediation with real samples under light irradiation.
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Affiliation(s)
- Sunanda Pal
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Vikram Mahamiya
- National Institute for Materials Science, Namiki1-1, Tsukuba, Ibaraki 305-0044, Japan
- Karpagam Academy of Higher Education, Pollachi Main Road, Eachanari Post, Coimbatore 641 021, Tamil Nadu, India
| | - Purbali Ray
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Abhimanyu Sarkar
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Farhin Sultana
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Bibhutosh Adhikary
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, West Bengal, India
| | - Brahmananda Chakraborty
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Mumbai 400094, India
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Bai L, Wang J, Yang K, Yan Y, Jin M, Cui D, Zhao M. Cobalt-doped double-layer α-Fe 2O 3 nanorod arrays for enhanced photoelectrochemical reduction of Cr(VI). NANOSCALE RESEARCH LETTERS 2023; 18:10. [PMID: 36764982 DOI: 10.1186/s11671-023-03785-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 01/31/2023] [Indexed: 05/24/2023]
Abstract
Element doping is an important method for improving the performance levels of photoelectrochemical (PEC) cells. Nevertheless, to date, the PEC conversion efficiency and photocurrent characteristics of the available photoanodes remain very low. In this study, cobalt (Co) was selectively doped into the bottom and/or top layers of double-layered α-Fe2O3 nanorod arrays grown on conductive transparent substrates (F:SnO2, FTO) via a two-step hydrothermal method; this process was performed to enhance the charge transfer ability and thus significantly improve the PEC performance. The light response capabilities of all α-Fe2O3 films were evaluated by an electrochemical workstation under dark or visible light irradiation conditions. The sample of Co doped in the bottom layer exhibited a high photoelectrochemical performance, achieving a current density of 1.37 mA/cm2 at + 1.0 V versus saturated calomel electrode (SCE); additionally, the sample exhibited a photoelectric synergistic ability to reduce Cr(VI) in an aqueous solution, with 84.85% reduction in 180 min. Under the influence of the electric field inside the double-layer electrode, the photoexcited electrons and holes are transferred to the surfaces of the FTO substrate and the photoanode, increasing the current density and enhancing Cr(VI) reduction. The results of this study offer an alternative approach for designing novel photoanodes with improved PEC performance levels by engineering the electron density distribution and band structure for efficient carrier separation; the results may provide new solutions in heavy metal reduction and contaminant degradation projects.
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Affiliation(s)
- Long Bai
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Jueyu Wang
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Kuo Yang
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Yi Yan
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Meitong Jin
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Daizong Cui
- College of Life Science, Northeast Forestry University, Harbin, China.
| | - Min Zhao
- College of Life Science, Northeast Forestry University, Harbin, China.
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Li X, Li X, Feng S. A photoelectrochemical sensor for firstly the detection of amlodipine besylate based on an MnC<sub>4</sub>Pc coated ZnO composite materials. ELECTROANAL 2022. [DOI: 10.1002/elan.202100703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Chen W, Liu S, Fu Y, Yan H, Qin L, Lai C, Zhang C, Ye H, Chen W, Qin F, Xu F, Huo X, Qin H. Recent advances in photoelectrocatalysis for environmental applications: Sensing, pollutants removal and microbial inactivation. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214341] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Guo F, Shi C, Sun W, Liu Y, Shi W, Lin X. Pomelo biochar as an electron acceptor to modify graphitic carbon nitride for boosting visible-light-driven photocatalytic degradation of tetracycline. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2021.06.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wang P, Dong F, He D, Liu S, Chen N, Huo T. Organic acid mediated photoelectrochemical reduction of U(vi) to U(iv) in waste water: electrochemical parameters and spectroscopy. RSC Adv 2021; 11:23241-23248. [PMID: 35479788 PMCID: PMC9036602 DOI: 10.1039/d1ra02505h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/03/2021] [Indexed: 11/24/2022] Open
Abstract
The photoelectrochemical reduction of U(vi) is recognized as an economical and effective way to eliminate radioactive pollution. In this study, we construct a α-Fe2O3/TiO2 film electrode-based photoelectrochemical cell to remove U(vi) and recover uranium from aqueous solution. Citric acid and oxalic acid could act as hole scavengers, being favorable for the photocatalytic reduction of U(vi). In the presence of 0.5 mM citric acid and oxalic acid, the uranium removal capacity reached 70% and 58%, respectively, while 24% was achieved for the system in the absence of acid. The XRD, SEM, FT-IR and XPS results revealed that a proportion of U(iv) was also precipitated as surface associated metastudtite. These novel observations have significant implications for the behavior of uranium within engineered and natural environments. In this study, we focus on organic acid mediated photoelectrochemical reduction of U(vi) to U(iv) in waste water by α-Fe2O3/TiO2 film electrodes, which have significant implications for the migration and transformation of uranium.![]()
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Affiliation(s)
- Pingping Wang
- College of Chemistry and Chemical Engineering, Mianyang Normal University Mianyang Sichuan 621010 China
| | - Faqin Dong
- The Key Laboratory of Solid Waste Treatment and Resource, Ministry of Education, Southwest University of Science and Technology Mianyang Sichuan 621010 China
| | - Dengliang He
- College of Chemistry and Chemical Engineering, Mianyang Normal University Mianyang Sichuan 621010 China
| | - Shuxin Liu
- College of Chemistry and Chemical Engineering, Mianyang Normal University Mianyang Sichuan 621010 China
| | - Ning Chen
- College of Chemistry and Chemical Engineering, Mianyang Normal University Mianyang Sichuan 621010 China
| | - Tingting Huo
- The Key Laboratory of Solid Waste Treatment and Resource, Ministry of Education, Southwest University of Science and Technology Mianyang Sichuan 621010 China
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Talooki EF, Ghorbani M, Rahimnejad M, Lashkenari MS. Evaluation of a visible light-responsive polyaniline nanofiber˗cadmium sulfide quantum dots photocathode for simultaneous hexavalent chromium reduction and electricity generation in photo-microbial fuel cell. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114469] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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