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Ananchuensook A, Wongchoosuk C, T-Thienprasert J, Boonchun A, Jungthawan S, Reunchan P. Effects of oxygen pressure on the morphology and surface energetics of β-PbO 2: insight from DFT calculations. Phys Chem Chem Phys 2023; 25:2793-2802. [PMID: 36514973 DOI: 10.1039/d2cp04632f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
For over a century, lead dioxide (PbO2) has been investigated in lead-acid batteries and extensively utilized in a variety of applications. Identifying the surface properties and equilibrium morphology of β-PbO2 (rutile phase) particles is mandatory for industrial utilization and surface engineering. Using density-functional calculations within the generalized gradient approximation revised for solids (PBEsol), we investigate a variety of surface properties of β-PbO2. The surface energies of low-Miller-index stoichiometric surfaces are firstly determined, and the (110) surface is found to be the most thermodynamically stable. The relative energetics of these surfaces are represented by a Wulff construction which shows an acicular shape, mostly dominated by the (110) and (100) surfaces. Besides, we investigate the surface chemistry of β-PbO2 under reduction and oxidation conditions as a function of oxygen pressure, finding that most surfaces except for (100) and (110) are likely to be oxidized. Under oxygen pressure at 1 atm and oxygen-rich limit, the (101) surface is the most thermodynamically stable, dominating the Wulff construction with pyramidal shapes. Our results indicate that the growth conditions that cause non-stoichiometry of the surface could modify the equilibrium Wulff shape of β-PbO2. Our predicted Wulff shapes and dominant facets agree with the experimental results in which the pyramidal shape of the β-PbO2 grains has often been observed with the (101) preferred orientation.
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Affiliation(s)
- Aroon Ananchuensook
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
| | - Chatchawal Wongchoosuk
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
| | - Jiraroj T-Thienprasert
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
| | - Adisak Boonchun
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
| | - Sirichok Jungthawan
- School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
| | - Pakpoom Reunchan
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
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Duan X, Wang Q, Ning Z, Tu S, Li Y, Sun C, Zhao X, Chang L. Fabrication and Characterization of PEG-In2O3 Modified PbO2 Anode for Electrochemical Degradation of Metronidazole. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Lv H, Liu Y, Wu X, Lv R, Zhou X, Ma X, Xiong Q. A closed-loop electrokinetic system for recovery of PbO 2@Fe composite derived from lead-containing sludge. CHEMOSPHERE 2022; 304:135338. [PMID: 35709836 DOI: 10.1016/j.chemosphere.2022.135338] [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: 05/17/2022] [Revised: 06/10/2022] [Accepted: 06/11/2022] [Indexed: 06/15/2023]
Abstract
Lead-containing sludge produced from lead-acid battery factory will cause environmental hazards if they are not treated properly. A novel process was developed to recycle lead from sludge back into Fe-doped PbO2 electrodes and realize sludge reduction in this study. The effects of Fenton conditioning on Pb removal efficiency in electro-kinetic (EK) treatment process and its mechanism as well as electro-dewatering (ED) performance were investigated. It was found that the oxidation of Fenton can promote desorption and release of Pb from the organic binding state, and improve the removal efficiency of Pb during EK process, as well as enhance sludge ED performance. About 63.8 wt% Pb can be removed from sludge during EK process, achieving sludge reduction of 63.5 wt% by ED treatment. The composite PbO2@Fe electrode recovered from lead-containing sludge showed a high electrocatalytic activity for acid red G (ARG) degradation. The electrode obtained by electrodeposition at 20 mA cm-2 had the largest exchange current density (3.26 × 10-5 A cm-2). In the experiment of dye wastewater electrocatalytic degradation, over 99.5% organic matter was degraded within 80 min.
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Affiliation(s)
- Hang Lv
- Hubei Engineering University, Wuhan, Hubei, 432000, China; School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Yao Liu
- College of Environmental and Biological Engineering, Wuhan Technology and Business University, Wuhan, Hubei, 430065, China
| | - Xu Wu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Ruibing Lv
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Xiangjun Zhou
- College of Urban and Environmental Sciences, Hubei Normal University, Huangshi, Hubei, 435002, China
| | - Xiao Ma
- College of Urban and Environmental Sciences, Hubei Normal University, Huangshi, Hubei, 435002, China
| | - Qiao Xiong
- College of Urban and Environmental Sciences, Hubei Normal University, Huangshi, Hubei, 435002, China.
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Man S, Luo D, Sun Q, Yang H, Bao H, Xu K, Zeng X, He M, Yin Z, Wang L, Mo Z, Yang W, Li X. When MXene (Ti 3C 2T x) meet Ti/PbO 2: An improved electrocatalytic activity and stability. JOURNAL OF HAZARDOUS MATERIALS 2022; 430:128440. [PMID: 35158250 DOI: 10.1016/j.jhazmat.2022.128440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/17/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Stable electrode materials with high catalytic activity are urgently required for electrochemical degradation of refractory organic pollutants in wastewater treatment. Herein, high conductive MXene (Ti3C2Tx) was firstly fabricated by electrophoretic deposition (EPD) as an interlayer for preparing a novel PbO2 electrode. The well-conducted Ti3C2Tx interlayer significantly improved the electrochemical performance of the EPD-2.0/PbO2 (EPD time was 2.0 min) electrode with the charge transfer resistance decreased by 9.51 times, the inner active sites increased by 5.21 times and the ∙OH radicals generation ability enhanced by 4.07 times than the control EPD-0/PbO2 anode. Consequently, the EPD-2.0/PbO2 electrode achieved nearly 100% basic fuchsin (BF) and 86.78% COD removal efficiency after 3.0 h electrolysis. Therefore, this new PbO2 electrode presented a promising potential for electrochemical degradation of BF and the new Ti3C2Tx middle layer could also be used to fabricate other efficient and stable anodes, such as SnO2, MnO2, TiO2, etc.
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Affiliation(s)
- Shuaishuai Man
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Dehui Luo
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Qing Sun
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Haifeng Yang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Hebin Bao
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China; Fundamental Studies department, Army logistics University of PLA, Chongqing 401311, PR China
| | - Ke Xu
- Multiscale Crystal Materials Research Center, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, PR China
| | - Xuzhong Zeng
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Miao He
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Zehao Yin
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Li Wang
- College of Power Engineering, Chongqing Electric Power College, Chongqing 400053, PR China
| | - Zhihong Mo
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Wenjing Yang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China.
| | - Xueming Li
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China.
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Zou C, Ma C, Chen F, Shao X, Cao L, Yang J. Crystal Facet Controlled Stable PbO2 Electrode for Efficient Degradation of Tetracycline. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Yu N, Wei J, Gu Z, Sun H, Guo Y, Zong J, Li X, Ni P, Han E. Electrocatalysis degradation of coal tar wastewater using a novel hydrophobic benzalacetone modified lead dioxide electrode. CHEMOSPHERE 2022; 289:133014. [PMID: 34864013 DOI: 10.1016/j.chemosphere.2021.133014] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/16/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
Coal tar wastewater is hard to degrade by traditional methods because of its toxic pollutant constituents and high concentration of aromatic hydrocarbons, especially phenolic substances. A new type of hydrophobic benzacetone modified PbO2 anode (BA-PbO2 electrodes) was used for the electrocatalytic treatment of coal tar wastewater in a continuous cycle reactor. The surface morphology, structure, valences of elements, hydrophobicity, hydroxyl radical (·OH) produced capacity, electrochemical properties and stability of BA-PbO2 electrodes were characterized by SEM (scanning electron microscopy), XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), contact angle, a fluorescence probe test, an electrochemical workstation and accelerated life test, respectively. The BA-PbO2 electrodes exhibited a compact structure and finely dispersed crystallize size of 4.6 nm. The optimum degradation conditions of coal tar wastewater were as follows: current density of 90 mA cm-2, electrode gap of 1 cm and temperature at 25 °C with flow velocity of 80 L h-1. The chemical oxygen demand (COD) removal efficiency reached 92.39% after 240 min of degradation under the optimized conditions and the after-treatment COD value was 379.51 mg L-1 which was lower than the centralized emission standard (less than 400 mg L-1). These findings demonstrated the feasibility and efficiency of electrocatalytically degrading coal tar wastewater by BA-PbO2 electrodes. The possible mechanism and pathway for phenol a specific pollutant in coal tar wastewater were investigated by quantum chemistry calculations (Multiwfn) and gas chromatography-mass spectrometry (GC-MS). The toxicity of each intermediate was predicted by the ECOSAR program.
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Affiliation(s)
- Naichuan Yu
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin, 300130, China; Tianjin Vocational Institute, School of Biological and Environmental Engineering, Tianjin, 300410, China.
| | - Jingyu Wei
- Tianjin Vocational Institute, School of Biological and Environmental Engineering, Tianjin, 300410, China; Tianjin Jinsheng Environmental Protection Consulting Service Co., LTD, Tianjin, 300308, China
| | - Zhensheng Gu
- Tianjin Vocational Institute, School of Biological and Environmental Engineering, Tianjin, 300410, China; Tianjin Jinsheng Environmental Protection Consulting Service Co., LTD, Tianjin, 300308, China
| | - Hailong Sun
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin, 300130, China
| | - Yong Guo
- Tianjin Vocational Institute, School of Biological and Environmental Engineering, Tianjin, 300410, China
| | - Jun Zong
- Tianjin Vocational Institute, School of Biological and Environmental Engineering, Tianjin, 300410, China
| | - Xi Li
- Tianjin Vocational Institute, School of Biological and Environmental Engineering, Tianjin, 300410, China
| | - Pan Ni
- Tianjin Petroleum Vocational and Technical College, Department of Petroleum Engineering, Tianjin, 301607, China
| | - Enshan Han
- Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin, 300130, China.
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