JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Wenlan Ji,Yuanjie Xiong,Yuan Wang,Tian C. Zhang,Shaojun Yuan
Dealing with arsenic pollution has been of great concern owing to inherent toxicity of As(III) to environments and human health. Herein, a novel multilayered SnO 2 /PPy/ β -PbO 2 structure on TiO 2 nanotube arrays (TNAs/SnO 2 /PPy/ β -PbO 2 ) was synthesized by a multi-step electrodeposition process as an efficient electrocatalyst for As(III) oxidation in aqueous solution. Such TNAs/SnO 2 /PPy/ β -PbO 2 electrode exhibited a higher charge transfer, tolerable stability, and high oxygen evolution potential (OEP). The intriguing structure with a SnO 2 , PPy , and β -PbO 2 active layers provided a larger electrochemical active area for electrocatalytic As(III) oxidation. The as-synthesized TNAs/SnO 2 /PPy/ β -PbO 2 anode achieved drastically enhanced As(Ⅲ) conversion efficiency of 90.72% compared to that of TNAs/ β -PbO 2 at circa 45.4%. The active species involved in the electrocatalytic oxidation process included superoxide radical (•O 2 − ), sulfuric acid root radicals (•SO 4 − ), and hydroxyl radicals (•OH). This work offers a new strategy to construct a high-efficiency electrode to meet the requirements of favorable electrocatalytic oxidation properties, good stability, and high electrocatalytic activity for As(III) transformation to As(V).
研究领域:
环境科学
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材料科学
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电化学
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DOI
PubMed
高影响因子
Materials
·
2026
·Vol. 19
·期 7
·1370
·
IF 3.7
Yi Luo,Nan Li,Lingjing Yang,Jinlong Wei,Yuantao Yang,Wentao Wang,Yang Zhao,Ruidong Xu,Xuanbing Wang
The high energy consumption of lead anodes in zinc production is caused by the slow oxygen evolution reaction (OER). We made a La-Mn co-doped β-PbO2anode using electrodeposition to solve this issue. The XRD and XPS results show that adding La shrinks the lattice and changes the electron structure. This helps Mn4+change into active Mn3+and creates more active oxygen on the surface, making the reaction easier. EIS tests show that the charge transfer resistance (Rct) decreased by 4.2 times, decreasing from 147.6 Ω to 34.72 Ω at 1.0 V. The Bode phase peak also moved to a lower frequency (from 122 Hz to 0.215 Hz), proving that the electrochemically active surface area (ECSA) increased significantly. At the industrial current of 50 mA cm−2, the anode shows a low overpotential of 840 mV and a Tafel slope of 265 mV dec−1. This improved performance saves 187.10 kWh of energy per ton of zinc. Therefore, the LaMn-β-PbO2anode is a promising and energy-saving option for industrial zinc production.
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DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shiwei He,Ruidong Xu,Bohao Yu,Yuqing Guo,Zhongsheng Hua,Fuyuan Zhang,Huihong Lv
In this study, β-PbO2-WC composite coatings were synthesized on a substrate using the electrodeposition method in an electrolyte containing Pb 2+ and WC particles. The preparation process study shows that the β-PbO2 bath containing WC particles becomes more stable for an ultrasonic dispersion time within 30 minutes. WC particles in the β-PbO2 bath are positively charged, with anions being adsorbed onto the particles. Compared to the β-PbO2 composite electrode, the oxygen evolution overpotentials for the P-PbO2-WC electrode are decreased, which demonstrates an energy-saving effect. The nucleation behavior study shows that the co-deposition of WC particles into the layer has little effect on the crystal growth of P-PbO2. The main process during the deposition time of 0~5 min were the nucleation of the β-PbO2 grains, the adsorption of WC particles, growth of β-PbO2 grains, and WC particles coated.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2024
·
IF 5.8
Yaxuan Wang,Peitong Cen,Hongyu Wang,Chenxi Li,Ziyin Xia,Guoqing Wu,Meng Li,Lei Huang,Jia Yan,Shaoqi Zhou,Ce-Hui Mo,Hongguo Zhang
Electrochemical oxidation (EO) for the removal of antibiotics is a promising technique because of the green and sustainable electrical-to-chemical energy conversion. However, the interaction mechanism between different electrolyte molecules and organic pollutants along with the generation pathway of reactive oxygen species remains unclear. Here, a β-PbO2 electrode was successfully prepared and employed as an effective tool for organic pollutant removal. The EO process with the β-PbO2 electrode and Na2SO4 electrolyte could completely remove tetracycline (TC) and achieve an impressive kinetic rate constant of 0.239 min−1. Quantum chemical calculations confirmed that hydrogen bonding was the primary binding force between TC and Na2SO4. Density functional theory calculations emphasized the key roles of radical and non-radical pathways in TC removal via the key reaction site (O atom in PbO2). Consequently, this study provided a novel insight into the intrinsic electrochemical behavior changes with various electrolytes, paving the way for a novel electrochemical process in water treatment applications.
研究领域:
环境科学
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电化学工程
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理论化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Zhaohui Han,Lei Xu,Chandrasekar Srinivasa Kannan,Jianhua Liu,Sivasankar Koppala,Shaohua Ju,Libo Zhang
In this paper, an Al/TiB 2 layered composite was prepared by plasma spraying for use as the base material to reduce resistivity and improve electrochemical performance in an electrode. The β-PbO 2 coating was prepared by electrochemical deposition . Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to study the Al/TiB 2 composite and the β-PbO 2 coating. The electrochemical performance of the Al/TiB 2 /β-PbO 2 and Ti/β-PbO 2 composites was studied by linear sweep voltammetry (LSV), Tafel polarization curves (Tafel) and electrochemical impedance spectroscopy (EIS). The results indicate that Al/TiB 2 /β-PbO 2 composite electrode materials with a uniform structure were successfully prepared by plasma spraying and electrochemical deposition. The structure of the Al/TiB 2 composite improves the conductivity of the electrode matrix, the optimal value of conductivity is 2.76 × 10 7 S m −1 , and the optimal value of density is 8.758 g cm −3 for β-PbO 2 coating. The composite also decreases the charge resistance in the double layer structure of the electrode surface, accelerating the charge transfer rate. Compared with the Ti matrix, the Al/TiB 2 /β-PbO 2 exhibited the best corrosion-resistant performance and electrochemical catalytic activity for electrowinning of nonferrous metals .
研究领域:
材料科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Song Wu,Junli Wang,Xuanbing Wang,Di Jiang,Jinlong Wei,Xiaoning Tong,Zhenwei Liu,Qingxiang Kong,Naixuan Zong,Ruidong Xu,Linjing Yang
s Ti-based PbO 2 electrodes must currently address the high overpotential and low corrosiveness of the anodic oxygen evolution reaction (OER) during zinc electrowinning. In this study, a composite electrode composed of Ti/TiH 2 /β-PbO 2 − Mn 3 O 4 @C (0.6 g L –1 ) was fabricated using Ti/TiH 2 generated by electrochemical reduction of Ti/TiO 2 prepared by laser ablation as an intermediate layer, co-deposited β-PbO 2 , and Mn 3 O 4 @C micro-flakes prepared by high-temperature pyrolysis-oxidation as the active layer. In a zinc electrowinning test solution (50 g L –1 ZnSO 4 mixed with 150 g L –1 H 2 SO 4 ), the oxygen evolution and corrosion behavior of the obtained Ti/TiH 2 /β-PbO 2 − Mn 3 O 4 @C composite anodes were systematically investigated. Ti/TiH 2 /β-PbO 2 − Mn 3 O 4 @C (0.6 g L –1 ) exhibited a low overpotential of 493 mV, a low Tafel slope of 73.6 mV dec −1 , a low i corr of 2.320 × 10 −5 A cm −2 and voltage stability of 1.65 V vs. RHE for up to 72 h in stability tests, with an overall performance outperformed most of the reported Ti-based PbO 2 electrode materials. The outstanding catalytic activity is primarily attributable to the low resistance and porous interlayer of TiH 2 nanosheets, which speeds up the rate of electron transfer. The addition of Mn 3 O 4 @C micro-flakes to the active layer enhances the composite electrode's OER performance and corrosion resistance.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jianqiang Ye,Buming Chen,Jun Guo,Hui Huang,Yapeng He,Shixing Wang
High oxygen evolution overpotential and low corrosion resistance are regarded as the main drawbacks of anode materials in zinc electrowinning . To improve the electrocatalytic activity of oxygen evolution reactions (OER) and reduce energy consumption in zinc electrowinning, a Co 3 O 4 nanoparticle-modified PbO 2 anode was prepared on a Ti substrate with Sn-SbO X as an interlayer through pulse electrodeposition . The surface morphology, phase composition, and electrochemical properties of the as-prepared anode were systematically investigated. The introduction of Co 3 O 4 nanoparticles refined the crystal size of PbO 2 and increased the surface roughness of the anode. Electrochemical tests suggested the excellent electrocatalytic activity of the Co 3 O 4 nanoparticle-modified PbO 2 anode. Density functional theory (DFT) calculations revealed that Co 3 O 4 nanoparticles reduced the OER free energy (1.58 eV) and that pulse electrodeposition reduced the PbO 2 crystal size and increased the active surface area of the anode. In the simulated zinc electrowinning test, an improved current efficiency (90.6 %) was achieved, and the low energy consumption (2,508.29 kW·h) for zinc production per ton was significantly reduced as compared with that for the conventional Pb-0.75 %Ag anode. The lifetime of the modified electrode is increased by approximately 36.8 %. This provides a reference for the design and development of anode materials with high oxygen evolution activity and strong corrosion resistance in zinc electrowinning systems.
研究领域:
材料科学
·
电化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Yingcai Wang,Min Chen,Can Wang,Xiaoyang Meng,Weiqiu Zhang,Zefang Chen,John Crittenden
Methylisothiazolinone (2-methyl-4-isothiazolin-3-one) (MIT) is a commonly used biocide in wastewater treatment processes. Residual MIT in wastewater leads to high environmental risks and toxicity. The degradation of MIT via electrochemical oxidation, including kinetics, energy efficiency, oxidation mechanism and degradation pathway, was investigated in this study. Findings from energy and cost evaluation by using electrochemical technology were compared with those of other technologies. Experimental results indicate that electrolyte, current density and initial concentration can significantly affect MIT degradation. The lowest electrical energy per order was less than 3.85 kWh m −3 when NaCl was used as the electrolyte. Electrochemical degradation is advantageous because it can be easily applied without adding chemicals into wastewater and has relative low costs. The oxygen evolution, production of recalcitrant byproducts, and the mass transfer limitation resulted in the decrease of instantaneous current efficiency and mineralization current efficiency. Electron efficiency analysis demonstrated that 68.8% of the electrons used for MIT oxidation were effectively utilized to mineralize MIT into CO 2 . The proportion of direct and indirect oxidation of MIT during electrochemical degradation was quantitatively determined as 37.7% and 62.3%, respectively. HO was the most effective species for MIT degradation. MIT degradation pathway was proposed, in which the C C bond in MIT was broken down. C 3 H 7 NOS and C 3 H 7 NO 4 were detected, indicating the occurrence of ring opening reaction. Sulfur was oxidized into SO 4 2− and cleaved from C 3 H 7 NOS.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guoquan Zhang,Shaowei Hu,Xiaoyu Zhu,Xiaoxin Hu,Fenglin Yang
An interlocking “ T -shape” structure was built by uniform filling β-PbO 2 crystalline inside the trace Ti 3+ self-doping TiO 2 nanotube arrays (TNAs) channels and depositing the cauliflower-like β-PbO 2 clusters on its upper surface through a facile current pulse deposition method. We elaborated the interfacial engineering strategy for generating compact oxide layers at TNAs bottoms and growing β-PbO 2 crystalline from the selectively conductive TNAs bottoms. Different characterization techniques and electrochemical analyses were conducted to characterize the morphology, structure, and electrochemical property of the β-PbO 2 partial filling/covering TNAs (β-PbO 2 /TNAs/Ti) materials. We also systematically investigated and elucidated the performance and mechanism of β-PbO 2 /TNAs/Ti anode activated peroxymonosulfate (PMS) system via berberine removal/mineralization, reactive oxygen species (ROS) identification/contribution, intermediates analysis, energy consumption and practical applicability estimation. Results illustrated that filling β-PbO 2 inside TNAs can efficiently improve the directional electron-transfer efficiency, oxygen evolution over-potential, tolerance to the varied water matrices and service lifetime of β-PbO 2 /TNAs/Ti anode activated PMS system. The ROS including • OH, S O 4 ∙ - and 1 O 2 that generated from PMS electro-activation are responsible for efficient berberine degradation through two pathways. This study will provide a general approach to construct the versatile tube-filled TNAs-based materials for wide applications in water/wastewater treatment.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Yilong Yan,Yijing Gao,Haiyang Zheng,Bowen Yuan,Qiaoqiao Zhang,Yu Gu,Guilin Zhuang,Zhongzhe Wei,Zihao Yao,Xing Zhong,Xiaonian Li,Jianguo Wang
OH radicals produced via an eco-friendly O 3 decomposition reaction in water are employed in a wide range of applications. In this work, three-dimensional (3D) β-PbO 2 /Ta 2 O 5 and Pt/Ta 3 N 5 samples with a rod-like morphology were successfully fabricated and coupled to carry out electrochemical ozone production (EOP) and hydrogen evolution reaction (HER), respectively. Moreover, the results on the in-situ electrodegradation of dimethoate also indicate that the β-PbO 2 /Ta 2 O 5 NRs show a great potential to be used in advanced oxidation processes (AOPs) applications. Experimental results and theoretical calculations reveal that the excellent EOP performance of the β-PbO 2 /Ta 2 O 5 NRs can be attributed to the adsorption energy of the O species, which can be modulated via the synergic effect between β-PbO 2 and Ta 2 O 5 . This work provides a reference for the development of stable electrocatalysts with high efficiency for the simultaneous production of O 3 and H 2 in environmental applications and energy conversion.
研究领域:
电化学
·
环境科学
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材料科学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Miao Lu,Siyuan Zhang,Liang Ma,Zhongmei Song,Xiushen Ye,Huifang Zhang,Haining Liu,Zhijian Wu
The efficient removal of recalcitrant organics in high-salinity systems, specifically brine, poses a significant challenge for electrochemically advanced oxidation processes in terms of both activity and stability. Herein, a composite electrode comprising of CNT/Nafion functionalized Ti/SnO 2 -Sb/β-PbO 2 -CNT/Nafion was developed for efficient and stable removal of octadecylamine (ODA) and 4-dodecylmorpholine (DMP) in a real high-salinity environment. The degradation efficiencies of ODA and DMP on the composite electrode can reach 100 % within 60 min, respectively. The total organic carbon (TOC) removal efficiency of ODA and DMP was significantly improved to 78 % and 66 % with remarkably low energy consumption (0.414 and 1.402 kWh/g TOC), respectively. The electrochemical characterizations demonstrate that the composite electrode exhibits improved electrochemical activity (oxygen evolution potentials = 1.791 V) and electrode surface area (ECSA = 20 cm 2 ), while maintaining reduced charge transfer resistance ( R ct = 18.21 Ω/cm 2 ) and enhanced corrosion-resistant capacity (corrosion potential = 1.115 V). Based on recycling and accelerated lifespan testing, the composite electrode demonstrates exceptional stability and recyclability. Additionally revealed was the linked stability mechanism. The electrocatalytic degradation of ODA and DMP begins with the removal of amino and morpholine rings, and then the decomposition of the carbon chains. Gas chromatography-mass spectrometry (GC–MS) and theoretical calculations were used to identify intermediate products generated during the degradation of ODA and DMP, and possible degradation pathways were provided in high-salinity systems, respectively. This work offered a fresh perspective on electrocatalytic oxidation for a real high-salinity system that is more efficient and stable.
研究领域:
环境科学
·
电化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）