JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2020
·Vol. 24
·期 3
·545-555
·
IF 2.646
Pan Yufu,Luo Yanfang,Li Chengcheng,Wang Rongjing,Yuan Yihao,Li Meng,Na Ping
The present study focused on the preparation, characterization, and application of cerium (Ce) and neodymium (Nd) co-doped lead (PbO 2 ) electrode, i.e., Ti/SnO 2 -Sb 2 O 3 /α-PbO 2 /Ce-Nd-β-PbO 2 . The electrochemical activities of the modified electrode were investigated and compared with those of Ce-PbO 2 , Nd-PbO 2 , and pure PbO 2 electrodes. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the surface morphology, crystal structure, and elemental states of the modified electrode. The Ce and Nd co-doped PbO 2 electrode had smaller crystal particles, more compact structure, and higher activity of electrocatalysis compared with the single-doped and undoped PbO 2 electrodes. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) were also utilized to study the electrochemical response of the modified electrodes. The results show that the prepared Ce-Nd-PbO 2 electrode has the highest O 2 evolution potential (OEP) and lowest charge transfer resistance, suggesting that it has the lower energy consumption than the other three kinds of electrodes. Electrochemical oxidation methyl orange (MO) as a model dye wastewater was studied to evaluate the potential applications of this modified electrode in environmental science. It was found that the Ce-Nd-PbO 2 electrode exhibited higher MO and chemical oxygen demand (COD) removal efficiency than single-doped and pure PbO 2 electrodes.
研究领域:
环境科学
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电化学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huachang Jin,Xuejiao Zhang,Yang Yu,Xueming Chen
The extensive evaporation-induced aggregation of scale inhibitors in the wastewater of recirculating cooling systems causes severe environmental pollution . In this study, Amino Trimethylene Phosphonic Acid (ATMP), an ordinary scale inhibitor, was degraded via electrochemical oxidation using a multi-layered Ti/IrO 2 -RhO x -TiO 2 /α-PbO 2 /β-PbO 2 electrode. The electrochemical oxidation experimental results verified the superior electro-catalytic properties of the β-PbO 2 electrode. Accelerated lifetime tests suggested that Ti/IrO 2 -RhO x -TiO 2 /α-PbO 2 /β-PbO 2 possesses a service lifetime of 201 h under a current density of 40000 A/m 2 , which is 3.4–100.5 times as long as other β-PbO 2 electrodes reported by other researchers. Four major operational parameters, namely electrolyte, current density, initial ATMP concentration, and pH, were discovered to significantly affect the ATMP degradation rate and electrical efficiency. The direct oxidation mechanism predominated in the degradation process of ATMP, achieving a 55.11% and 38.82% removal efficiency in Na 2 SO 4 and NaCl solutions, respectively. In addition, two possible degradation pathways of ATMP were proposed: induced by the breaking of either C-P or C-N bonds.
研究领域:
环境工程
·
电化学
·
废水处理
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产品关联
DOI
高影响因子
SN Applied Sciences
·
2019
·Vol. 1
·期 3
·1-10
·
IF 0
He Shiwei,Xu Ruidong,Guo Yuqing,Zhao Zhuo,Yu Bohao,Xiao Saijun,Lv Huihong
In this study, β-PbO 2 –Co 3 O 4 composite coatings were synthesized on a substrate using the electrodeposition method in an electrolyte containing Pb 2+ and Co 3 O 4 particles. The preparation process study shows that the β-PbO 2 bath containing Co 3 O 4 particles becomes more stable for an ultrasonic dispersion time within 30 min, with the stability beginning to decrease after the ultrasonic time exceeds 30 min. Co 3 O 4 particles in the β-PbO 2 bath are positively charged, with anions being adsorbed onto the particles. The nucleation behavior study shows that the electric field force plays a dominant role in the adsorption process for the Co 3 O 4 particles. The nucleation and growth of β-PbO 2 on the Co 3 O 4 particles started for the particles closer to the substrate. In addition, the thickness of the β-PbO 2 layer on the Co 3 O 4 particles was inversely proportional to the distance between the Co 3 O 4 particles and the substrate. Compared to the pure PbO 2 electrode, the oxygen evolution overpotentials for the β-PbO 2 –Co 3 O 4 electrode are decreased significantly, which demonstrates an energy-saving effect.
研究领域:
材料科学
·
电化学
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DOI
Catalysts
·
2022
·Vol. 12
·期 11
·1297
·
IF 4.501
Jianshe Tang,Zhubin Cheng,Hao Li,Li Xiang
A novel three-dimensional network nickel foam/PbO2combination electrode (PbO2-NF) with high electrochemical degradation efficiency to norfloxacin was successfully fabricated through the electrodeposition of PbO2on the substrate of nickel foam. The characterization of an PbO2-NF electrode, including surface morphology, elemental components, electrochemical performance, and stability was performed. In electrochemical oxidation tests, the removal efficiency of norfloxacin (initial concentration for 50 mg/L) on PbO2-NF reached 88.64% within 60 min of electrolysis, whereas that of pure nickel foam was only 30%. In the presence of PbO2-NF, the optimum current density, solution pH, electrode spacing for norfloxacin degradation were 30 mA/cm2, 11, and 3 cm, respectively. The electric energy consumption for 80% norfloxacin was approximately 5 Wh/L. Therefore, these results provide a new anode to improve the removal of norfloxacin in the wastewater with high efficiency and low energy consumption.
研究领域:
环境科学
·
电化学工程
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2015
·
IF 2.729
Yijing Xia,Qizhou Dai,Jianmeng Chen
The novel nickel modified PbO 2 electrodes were successfully prepared via electrodeposition in nitrate solution. The influence of nickel content on the physico-chemical properties and electrocatalytic performance of PbO 2 electrodes was investigated. The electrodes were characterized by SEM, EDX and XRD techniques. A limited amount of doping nickel could produce a more compact PbO 2 film and diminish the size of the crystal grains. The steady-state polarization curves and the cyclic voltammetry analysis showed that the 1% Ni–PbO 2 electrode had the highest oxygen evolution potential and the optimal electrochemical oxidation ability. The cyclic voltammograms with various scan rates showed that the oxidation of aspirin on these PbO 2 electrodes was a typical diffusion-controlled electrochemical process. Stability tests of different PbO 2 electrodes showed that 1% Ni–PbO 2 electrode had the highest electrochemical stability. In addition, nickel modified PbO 2 electrodes were used to degradation aspirin in aqueous solution, which gave the direct evidence of the electrocatalytic capabilities of these electrodes. The results showed that 1% Ni–PbO 2 electrode obtained the highest kinetic rate constant, chemical oxygen demand (COD) and total organic carbon (TOC) removals, which were 1.41, 1.22, 1.20 times than those of undoped PbO 2 electrode, respectively. Moreover, the energy required for the treatment of 1 m 3 aspirin solution significantly decreased and the hydroxyl radical utilization rate was enhanced after appropriate nickel doping. As a result, the 1% Ni–PbO 2 electrode is a promising anode for the treatment of organic pollutants.
研究领域:
环境科学
·
电化学
·
污染控制
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xuanbing Wang,Junli Wang,Wenhao Jiang,Chen Chen,Bohao Yu,Ruidong Xu
In industrial zinc electrowinning, the anodic oxygen evolution reaction (OER) has sluggish kinetics leading to ultrahigh overpotential and energy consumption. Herein, a sandwich-like MnCo 2 O 4 modifying PbO 2 composite electrode was fabricated via chemical-bath-deposition and electrodeposition. Consequently, the synthesized PbO 2 electrode exhibits low Tafel slope of 0.17 V per decade and an operating potential of 1.68 V vs. SCE for 500 A m −2 in a simulated solution containing 150 g L −1 H 2 SO 4 and 50 g L −1 Zn 2+ . Compared with traditional Pb-0.76Ag alloy, the overpotential at 500 A m −2 decreased by 357 mV, which ascribe to the incorporation of MnCo 2 O 4 minoring crystal grain size and charge transfer resistance and enlarging active surface area. Furthermore, the composite electrode shows robust durability as long as 95 h at 15,000 A m −2 in 0.5 M H 2 SO 4 electrolyte. Hence, this study offers a facile synthesis route to prepare composite electrodes for zinc electrowinning and provides deep insight into the relationship among modifying substances, microstructures, and electrocatalytic activity.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Qizhou Dai,Jiazhong Zhou,Mili Weng,Xubiao Luo,Daolun Feng,Jianmeng Chen
This study presents an electrochemical method for the degradation of metronidazole (MNZ) in aqueous solution with novel PbO 2 electrode, which was prepared via electrodeposition in nitrate solution. The influencing factors on electrochemical decomposition of pollutants were evaluated and the removal of MNZ and chemical oxygen demand (COD) reached 78.09% and 21.77% after 120 min treatment under the optimal conditions with the concentration of supporting electrolyte, the initial concentration of MNZ, the pH and the current density were 0.10 mol/L, 100 mg/L, 6.4 and 10 mA/cm 2 , respectively. Then, the Co doped PbO 2 electrodes were prepared and used to degrade MNZ under the optimal conditions. Relatively good performance was achieved when the molar ratio of Pb and Co was 100:1. Compared to pure PbO 2 electrode, the steady-state polarization curves and cyclic voltammetry analysis showed that 1.0% Co-PbO 2 electrode had a higher oxygen evolution potential and greater current of reduction and oxidation peaks, which increased the electrochemical activity and decreased the energy consumption. Finally, based on the intermediate products identified by IC and GC/MS, the main degradation pathway of MNZ was proposed including ring open, denitrification and radical reactions.
研究领域:
环境科学
·
电化学工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2022
·
IF 6.796
Jinmin Zhao,Linghao Kong,Xingyun Hu,Xianjia Peng
Recycling strongly acidic wastewater as diluted H 2 SO 4 after contaminants contained being removed was previously proposed, however, Cl(-I), a kind of contaminant contained in strongly acidic wastewater, is difficult to remove, which severely degrades the quality of recycled H 2 SO 4 . In this study, the removal of Cl(-I) using PbO 2 was investigated and the involved mechanisms were explored. The removal efficiency of Cl(-I) reached 93.38% at 50℃ when PbO 2 /Cl(-I) mole ratio reached 2:1. The identification of reaction products shows that Cl(-I) was oxidized to Cl 2 , and PbO 2 was reduced to PbSO 4 . Cl 2 was absorbed by NaOH to form NaClO, which was used for the regeneration of PbO 2 from the generated PbSO 4 . Cl(-I) was removed through two pathways, i.e., surface oxidation and •OH radical oxidation. •OH generated by the reaction of PbO 2 and OH − plays an important role in Cl(-I) removal. The regenerated PbO 2 had excellent performance to remove Cl(-I) after six-time regeneration. This study provided an in-depth understanding on the effective removal of Cl(-I) by the oxidation method.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Shuaishuai Man,Dehui Luo,Qing Sun,Haifeng Yang,Hebin Bao,Ke Xu,Xuzhong Zeng,Miao He,Zehao Yin,Li Wang,Zhihong Mo,Wenjing Yang,Xueming Li
Stable electrode materials with high catalytic activity are urgently required for electrochemical degradation of refractory organic pollutants in wastewater treatment . Herein, high conductive MXene (Ti 3 C 2 T x ) was firstly fabricated by electrophoretic deposition (EPD) as an interlayer for preparing a novel PbO 2 electrode. The well-conducted Ti 3 C 2 T x interlayer significantly improved the electrochemical performance of the EPD-2.0/PbO 2 (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/PbO 2 anode. Consequently, the EPD-2.0/PbO 2 electrode achieved nearly 100% basic fuchsin (BF) and 86.78% COD removal efficiency after 3.0 h electrolysis. Therefore, this new PbO 2 electrode presented a promising potential for electrochemical degradation of BF and the new Ti 3 C 2 T x middle layer could also be used to fabricate other efficient and stable anodes, such as SnO 2 , MnO 2 , TiO 2 , etc.
研究领域:
环境科学
·
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Chongjie Zou,Chenglong Ma,Fang Chen,Xiang Shao,Limei Cao,Ji Yang
Achieving the robust PbO 2 electrode with the high onset potential is of considerable importance for applying electrochemical pollutants degradation. Herein, the crystal plane strategy was adopted to modify the PbO 2 surface structure through the surfactant induction during synthesis in the electrodeposition process. PbO 2 (β(3 0 1)) and PbO 2 (α(2 0 0), β(3 0 1)) electrodes were obtained by the controlling conditions of surfactants sodium dodecyl sulfate (SDS) and hexadecyl trimethyl ammonium bromide (CTAB). Compared with conventional PbO 2 , the PbO 2 (CTAB) electrode exhibits outstanding performance in electrochemical stability and higher onset potential versus the PbO 2 (SDS). Accelerated life of the PbO 2 (CTAB) electrode is 147 h longer than that of the pure PbO 2 under a high current density of 1A·cm −2 , and the amount of lead ion dissolution is only 45% of that observed in pure PbO 2 . In this work, tetracycline (TC) was taken as an example to evaluate the degradation effect of electrodes. Due to its unique crystal texture, the PbO 2 (CTAB) electrode exhibits higher COD removal rate and TOC removal rate, 35% and 20% respectively beyond that of the conventional lead dioxide electrode. Therefore, it is of great value for its industrial electrode degradation of pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Jinlong Wei,Junli Wang,Xuanbing Wang,Wenhao Jiang,Nianxiang Hu,Li Wang,Min Li,Ruidong Xu,Linjing Yang
Designing active and durable cost-effective electrocatalysts for catalyzing the oxygen evolution reaction (OER) under a strongly acidic environment is a highly promising approach for OER-associated sustainable energy supplies. Herein, a Pb-Sn-Ca/α-PbO 2 /β-PbO 2 -Mn 2 O 3 (PSC/PbO 2 -Mn 2 O 3 ) composite electrode is fabricated via a simple two-step process. First, porous Mn 2 O 3 microspheres are synthesized by the solvothermal method . Then, a PSC/PbO 2 -Mn 2 O 3 composite electrode with a special embedded structure is prepared through the introduction of Mn 2 O 3 by composite electrodeposition . The low OER overpotential (621 mV) of the PSC/PbO 2 -Mn 2 O 3 (12 g L −1 ) composite electrode is reduced by 445 mV compared with that of the industrial Pb-(0.76 wt%) Ag electrode at a current density of 50 mA cm −2 . In addition, it shows a service life of up to 91 h at a high operation current density of 1.5 A cm −2 in acidic media (3.06 g L −1 H + ), which indicates its excellent stability. Therefore, this work not only demonstrates a design for a durable and high-efficiency electrocatalyst for acidic water oxidation but also provides strategies for the synthesis of advanced electrocatalytic electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Chaoyang Zhang,Conghao Gao,Shumin Yang,Xin He,Yue Chen,Xiao Qin,Yulin Tang
Chloramphenicol (CAP) is used extensively in industry and daily life, but its abuse has seriously affected the environment and public health. In this paper, a new composite PbO 2 electrode was obtained through the modification Sm and polyethylene glycol (PEG), and an electrocatalytic oxidation technology of CAP degradation was investigated. The results showed that the catalytic degradation ability and industrial service life of the PEG-Sm-PbO 2 composite electrode were significantly enhanced. Co-doping inhibited the growth of grains, resulting in the formation of refined pyramidal grains on the surface of the electrode, which increased the number of active spots. The industrial service life of the modified electrode was improved by 87.0%. In addition, the degradation effect under different conditions and mechanism of CAP were also explored. The optimal conditions for CAP degradation were explored, at which time the CAP degradation rate reached 99.1%. The degradation process was in accordance with the primary reaction kinetics, and the apparent rate constant of CAP at the PEG-Sm-PbO 2 electrode was raised by 57.1% in comparison with the unmodified electrode, indicating that the modification facilitated the degradation of CAP in the electrode. Finally, two possible CAP degradation pathways were deduced. The results will provide technical support and a theoretical basis for the degradation of persistent organic pollutants.
研究领域:
环境科学
·
电化学工程
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）