ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wenqing Zhang,Hu Wang,Zhilong Chen,Pengxiang Wang,Xin Liu,Hao Dong,Jiaoling Zhao,Yun Cui,Yuchuan Shao
High-energy radiation detectors with a good imaging resolution, fast response, and high sensitivity are desired to operate at a high electric field. However, strong ion migration triggered by electrochemical reactions at the interface between a high-potential electrode and an organic–inorganic hybrid perovskite limits the stability of radiation detectors under a high electric field. Herein, we demonstrate that such ion migration could be effectively suppressed in devices with a Ti cathode, even at a high electric field of 50 V mm–1, through time-of-flight secondary-ion mass spectrometry. X-ray photoelectron spectroscopy illustrates that Ti–N bonds formed at the interface of MAPbBr3 perovskite single crystals/Ti electrode effectively inhibit the electrochemical reaction in organic–inorganic hybrid perovskite devices and ultimately improve the operating stability under a high electric field. The device with a Ti electrode reaches a high sensitivity of 96 ± 1 mC Gyair–1 cm–2 and a low detection limit of 2.8 ± 0.3 nGy s–1 under hard X-ray energy.
研究领域:
材料科学
·
辐射探测技术
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Xi Li,Huachun Lan,Gong Zhang,Xiao Tan,Huijuan Liu
Oily wastewater treatment has been restricted by the existence of stable oil-in-water (O/W) emulsions containing micrometer-sized oil droplets. However, the strong adhesion and stacking of emulsified oil droplets on the surface of current separation media cause serious fouling of the treatment unit and the rapid decline of treatment efficiency. Herein, a novel flow-through titanium (Ti) electrode-based filtration device with remarkable oil droplet rejection property was well designed for the continuously separating O/W emulsion. In contrast to the pristine Ti foam, the permeance of the TiO2 nanoarray-coated Ti foam (NATF) increased from 2538 to 4364 L m–2 h–1 bar–1 through gravity-driven flow. Further, more than ∼70% permeability can be maintained after 6 h of O/W emulsion filtration using the current device, the value of which was markedly higher than that of conventional oil/water separation filters (less than 5%). According to the results of wettability test, the super-oil-repellent surface endowed by this nanoarray structure primarily avoided the formation of a compact oil fouling layer. When the voltage was applied, accompanied by the electrophoresis effect, redistribution of surfactant molecules on the surface of oil droplets induced by an electric field made them readily captured by the microbubbles continuously generated from the electrode, thereby rapidly migrating these bubble-adhered oil droplets far from the filtration medium.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 30
·11949-11956
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IF 8.262
Lian-Kui Wu,Xin-Yu Liu,Ji-Ming Hu
Ti-supported IrO2 or RuO2 oxide coated electrodes are widely used for the oxygen evolution reaction (OER) in acidic media. Electrocatalytic activity and long-term stability need to be further improved for these types of electrodes. A highly porous and well-adhered electrodeposited SiO2 (e-SiO2) film is proposed as the interlayer in this work to meet the above-mentioned requirements. The results show that the active oxide fully fills in the porous network throughout the whole thickness of the e-SiO2 film, to form “total-depth” highly porous oxide electrocatalytic coatings. For this reason, more than 1 order of magnitude higher apparent activity towards the OER at the Ti/e-SiO2/IrO2 (or RuO2) electrode is achieved compared to that of the conventional Ti/IrO2 or Ti/RuO2 electrode. Literature survey indicates that these novel electrodes are one of the most active Ti electrodes ever reported. The service life of this type of electrode is also obviously enhanced due to the “inter-locking” structure formed between the active oxide layer and e-SiO2 film.
研究领域:
电化学
·
材料科学
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
·
IF 6.2
Yonglian Qiao,Lingxu Yang,Erwei Xie,Mengqi Luo,Le Wang,Chaoliu Zeng,Huijun Liu
Titanium alloy chemical milling wastewater contains a significant amount of ethylene glycol monobutyl ether (EGBE), which is toxic and difficult to be degraded by microorganisms, and the emission will lead to severe environmental pollution. To solve this problem, the electrocatalytic oxidation method was employed to remove EGBE in the wastewater, in which a porous Ti 4 O 7 /Ti electrode were prepared and employed as the anode, while stainless steel acted as the cathode. The effects of current density, interelectrode distance, and stirring mode on the COD removal rate were also investigated. Results show that the COD of the wastewater significantly decreases from 12410 to 15 mg L −1 after 16 h of electrolysis at 10 mA cm −2 and electrode spacing of 1.0 cm as well as aeration stirring at 100 mL min −1 . Moreover, pilot-plant scale testing reveals that the COD decreasing from 11980 to 183 mg L −1 after 24 h of electrolysis. Consequently, the utilization of porous Ti 4 O 7 /Ti electrode as anode in the electrocatalytic oxidation method presents significant potential in removal of EGBE in aviation industry wastewater.
研究领域:
环境科学
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电化学工程
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工业废水处理
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产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 22
·6814
·
IF 3.623
Hongxia Lv,Peiwei Han,Xiaogang Li,Zhao Mu,Yuan Zuo,Xu Wang,Yannan Tan,Guangxiang He,Haibo Jin,Chenglin Sun,Huangzhao Wei,Lei Ma
Presently, in the context of the novel coronavirus pneumonia epidemic, several antibiotics are overused in hospitals, causing heavy pressure on the hospital’s wastewater treatment process. Therefore, developing stable, safe, and efficient hospital wastewater treatment equipment is crucial. Herein, a bench-scale electrooxidation equipment for hospital wastewater was used to evaluate the removal effect of the main antibiotic levofloxacin (LVX) in hospital wastewater using response surface methodology (RSM). During the degradation process, the influence of the following five factors on total organic carbon (TOC) removal was discussed and the best reaction condition was obtained: current density, initial pH, flow rate, chloride ion concentration, and reaction time of 39.6 A/m2, 6.5, 50 mL/min, 4‰, and 120 min, respectively. The TOC removal could reach 41% after a reaction time of 120 min, which was consistent with the result predicted by the response surface (40.48%). Moreover, the morphology and properties of the electrode were analyzed. The degradation pathway of LVX was analyzed using high-performance liquid chromatography–mass spectrometry (LC–MS). Subsequently, the bench-scale electrooxidation equipment was changed into onboard-scale electrooxidation equipment, and the onboard-scale equipment was promoted to several hospitals in Dalian.Keywords:titanium suboxide electrode;levofloxacin;response surface methodology (RSM);degradation mechanisms and pathways
研究领域:
环境科学
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医学工程
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产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Qizhou Dai,Lei Jiang,Xubiao Luo
Titanium based lead dioxide electrodes were successfully prepared by the method of electrodeposition in nitrate solution, including titanium base, Sn-SbO X interlayer, α-PbO 2 middle layer and β-PbO 2 active layer. Rhodamine B (RhB) was selected as the model pollutant to optimize the effects of operational factors in the electrochemical oxidation process. The removal of RhB and chemical oxygen demand (COD) were detected at different reaction time and the relative optimized results were achieved on condition of the concentration of supporting electrolyte, initial RhB concentration, pH value and applied current density at 0.1 mol/L, 200 mg/L, 4.4, and 20 mA/cm 2 , respectively. The kinetics results on RhB removal indicated that RhB degradation by electrochemical oxidation followed the pseudo- first-order reaction. Besides, UV-vis spectra revealed that the conjugated structure of RhB was easier and prior to be degraded. The intermediates generated in the solution were identified by GC/MS and a possible degradation pathway of RhB was proposed.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Ting Su,Mengdan Wang,Bozhou Xianyu,Kui Wang,Pingqiang Gao,Cuiying Lu
The Co 3 O 4 –Ti electrodes were successfully prepared via calcination method to degrade nitrogen-containing (TNP) simulate wastewater in this reaserch. SEM and EDS were employed to analyze the morphology and element composition on Co 3 O 4 –Ti electrode, revealing the successful load of cobalt element. Then the electrochemical performance was evaluated by CV and indicated a better redox performance of electrode. Furthermore, five factors as processing time (A), electrolyte concentration (B), pH (C), initial concentration of TNP (D), and current density (E) were systematic studied in electrical treatment process. The removal rate of TN could be 77%. After the optimization work by RSM, the removal rate of TN raised up to 81% with the condition as: A of 180 min, B of 0.05 M, C of 3, D of 400 mg L −1 , and E of 20 mA cm −2 . The sequence of significants is: C > D > A > E > B. Mechanism analysis revealed that the entire process could be divided into two stages. In the first stage, organic nitrogen compounds were converted into inorganic nitrogen species, such as NO 3 –N. The oxidation and reduction would react owing to the generating of ·OH at second stage in order to turn the NO 3 –N into NO 2 –N, NH 4 –N or N 2. The activation of ·OH on the surface of Co 3 O 4 –Ti electrode possesses the exothermic nature with transition theory. The energy calculation of 1.168 eV indicated these reactions could occur spontaneously.
研究领域:
环境科学
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电化学工程
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2012
·
IF 4.951
Jing Yang,Ligang Feng,Fengzhan Si,Yuwei Zhang,Changpeng Liu,Wei Xing,Kunqi Wang
H 2 -mesoporphyrin IX and Zn-mesoporphyrin IX have been investigated as sensitizers for the titanium dioxide (TiO 2 ) film electrode to construct a new two-compartment photoelectrochemical biofuel cell (PEBFC). The PEBFC can convert the light and chemical energy to electricity by consuming photons and oxidizing glucose. The two sensitizers are similar with two carboxyl anchoring groups, except that the central hydrogen atoms in the H 2 -mesoporphyrin IX are replaced by zinc. To determine how cell performance is affected by the sensitizer, we analyze the photochemical and photoelectrochemical properties of the two sensitizers by physical characterization and photoelectrochemical experiments. The UV–Vis absorption spectra and X-ray photoelectron spectra (XPS) indicate that the interactions between the sensitizer and TiO 2 decrease in the order of H 2 -mesoporphyrin IX > Zn-mesoporphyrin IX. The interactions are also determined by Fourier transform infrared (FTIR) spectra which indicate that the two sensitizers are adsorbed on the TiO 2 film through the carboxyl groups. The photovoltaic characteristics show the Zn-mesoporphyrin IX is less effective in comparison with the H 2 -mesoporphyrin IX, since the Zn-mesoporphyrin IX enhances the back electron-transfer process, producing lower IPCE and current. These results reveal that the H 2 -mesoporphyrin IX is a more efficient sensitizer compared with the Zn-mesoporphyrin IX for the PEBFC.
研究领域:
生物化学
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材料科学
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能源科学
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DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Hong Wang,Peiyong Wang,Minghui Du,Ruohan Wang,Binzhi Zhang,Wei Li,Shuichen Yan,Biao Wu,Jianxin Li
Sodium 2,2,3,3-tetrafluoropropionate (STFP) is a key fluorochemical, but conventional synthesis faces harsh conditions and pollution. Herein, an electrochemical membrane reactor (ECMR) was developed for the green synthesis of STFP. MnO x /Ti membrane anodes with varying MnO x loadings were prepared via ultrasonic-assisted impregnation-pyrolysis. In the ECMR (MnO x /Ti anode, stainless-steel mesh cathode), a mixed aqueous solution of 2,2,3,3-tetrafluoro-1-propanol (TFP) and NaOH was oxidized to yield STFP permeate. Electron spin resonance and radical quenching elucidated the mechanism. Under the optimized conditions, the 6.58 wt% MnO x /Ti electrode exhibited optimal activity due to uniform MnO x dispersion, achieving 34.68 % TFP conversion and 94.02 % STFP selectivity. Efficient synthesis is attributed to a synergistic mechanism: direct electron transfer mediated by Mn(IV) and anodic hole-induced •OH radical generation. Specifically, the three-dimensional porous structure of the MnO x /Ti membrane electrode enhanced mass transfer and promoted the contact between TFP and •OH/Mn(IV) active sites, finally accelerating product efflux, thereby improving reaction efficiency and selectivity. Purification of ECMR permeate yielded STFP with 90.27 % purity. This work provides a green strategy for sustainable fluorochemical synthesis.
研究领域:
电化学工程
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环境化学
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材料科学
·
绿色化学
·
膜科学与技术
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有机电合成
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2016
·Vol. 23
·期 10
·10050-10057
·
IF 2.76
Xiao Hanshuang,Lv Baoying,Gao Junxia,Zhao Guohua
A hydrothermal electrocatalytic oxidation (HTECO) method is adopted to treat the biorefractory and toxic 2,4-dichlorophenoxyacetic acid (2,4-D) herbicides wastewater on nano-Pt/Ti electrode in the existence of H 2 O 2 . Comparisons for the removal of 2,4-D and total organic carbon (TOC) have been carried out between HTECO with individual electrochemical oxidation (EO) and hydrothermal catalytic oxidation (HTCO), showing that high mineralization efficiency was obtained in HTECO process. The possible factors resulting in the high removal efficiency in HTECO process have been studied by investigating the properties of the electrode and solution in hydrothermal condition, the amount of active radicals, the decay kinetic, and evolution of main intermediates of 2,4-D. Thus, an enhanced mechanism for HTECO method for the treatment of herbicides wastewater has been obtained.
研究领域:
环境工程
·
电化学工程
·
水污染控制
·
高级氧化技术
·
环境催化
·
污染物降解动力学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Haiyang Liu,Haijun Chen,Francis Addison,Chang Rong,Jiao Qu,Ya-nan Zhang,Deming Dong,Xiuyi Hua
The residual antibiotics in environmental media posed a serious threat to public health and the ecosystem. In this work, the electrocatalytic degradation of ampicillin (AMP) by carbon nanotubes/agarose/titanium (CNTs/AG/Ti) electrode was studied and several experimental factors were further optimized. The results showed that the electrocatalytic degradation of AMP was highly dependent on applied potential and CNTs dosage. Under the optimal conditions (5 mg/L AMP, pH 8, 8 V applied potential, and 7 wt% CNTs dosage), the maximum degradation efficiency achieved 96.7% within 30 min. In the degradation process, superoxide radicals (•O 2 - ) and hydroxyl radicals (•OH) played dominant roles, and the possible electrocatalytic degradation pathways for AMP were also proposed from the identified intermediates. Based on the quantitative structure-activity relationship (QSAR) model, the potential acute and chronic toxicities were predicted by the ecological structure-activity relationships (ECOSAR) program, and the bioconcentration factors (BCFs), developmental toxicity, and Ames mutagenicity were further analyzed using the toxicity estimation software tool (TEST). The results revealed the potential toxicity of some intermediates was higher than that of the parent antibiotic. This study provided an eco-friendly electrocatalytic technology for antibiotic wastewater treatment and investigated the potential toxicity of intermediates during the degradation process.
研究领域:
环境科学
·
电化学
·
毒理学
·
水处理技术
✓ 已验证
DOI
高影响因子
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