EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2018
·Vol. 2018
·期 36
·4053-4062
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IF 2.507
Xiaoyun Chen,Dong-Hau Kuo,Zong-Yan Wu,Hairus Abdullah,Jubin Zhang,Jinguo Lin
Graphical A Cu-based bimetal seleno–sulfide catalyst system with a CuS covellite structure has been developed for organic degradation that even occurs in the dark. Cu Ni SeS-2 showed the fastest degradation of an MB solution (100 mL, 10 ppm) in 5 min, but Ni -free Cu Se S did not have good catalytic activity. The Cu 2+ /Cu + ratio, oxygen vacancy, and S 6+ are correlated to perform good dye degradation. In order to overcome the photocatalytic degradation reaction with a need for light excitation, the exploration of a catalyst for the organic degradation reaction without light has become one of the core challenges in catalysis and pollution control. Here we report a novel Cu NiSe S nanosheet catalyst with a hexagonal structure by a feasible preparation method. The structure and composition of Cu NiSe S were well characterized by X-ray diffractometry and electron microscopy, and X-ray photoelectron spectrometry, respectively. The result indicated that the best Cu NiSe S-2 of 25 mg displayed excellent activity even in the dark to complete the degradation of 100 mL of MB solution of 10 ppm within 5 min. This catalyst also showed relatively good stability and durability during the reusability tests. The reasons for the fast MB degradation in the dark were investigated and the reaction kinetic mechanism was proposed.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
·
IF 8.1
Siyi Li,Bin Liu,Huayang Tian,Yujie Ning,Shuo Wu,Yihan Song,Qi Wang
The practical application of photocathodic protection (PCP) technology has been hindered by its failure in darkness. In this work, The BiVO 4 /MoO 3 composites were synthesized through a simple hydrothermal method, which were used as functional fillers, and then added to polyurethane resins to prepare energy-storing PCP coatings. This achievement enabled efficient PCP even in darkness. The 304 stainless steel coated with PCP coating (PB 10 M 1 ) exhibited excellent photoelectrochemical properties as photocurrent density of 394 μA/cm 2 , and the corrosion potential decreased by about 350 mV. Furthermore, the cathodic protection effect of PB 10 M 1 could last for 15 h in the dark, showing exceptional stability, superior energy-storage ability and potential application. The superior PCP performance of BiVO 4 /MoO 3 should be attributed to the cooperative effect in heterojunction structure and electronic regulation revealed by electrochemical characterizations and DFT calculation.
研究领域:
材料科学
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电化学
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2021
·
IF 7.963
Ziyu Zhao,Meixuan Wu,Dandan Zhou,Quan Chen,Hao Li,Di Lang,Bo Pan,Baoshan Xing
Environmentally persistent free radicals (EFPRs) have recently attracted a great deal of research attention because of their significant toxicity and ubiquitous occurrence in the environment. The information is still very limited on how to estimate the intensity of EPFRs under ambient circumstances. This study is designed to specifically compare EPFRs generation during catechol degradation in dark and UV light irradiation. CuO and TiO 2 were selected as model metal oxides to coat on silica at 1% CuO has a large electron exchange capacity, which may mediate catechol degradation in dark, while TiO 2 possesses strong photocatalytic property and could accelerate catechol degradation under UV light. Under UV light irradiation, EPFRs were generated very quickly and reached the maximum value in 4 d, which was related to the photocatalytic property of the particle. However, these EPFRs dissipated quickly in 14 d. On the contrary, the intensities of EPFRs generated in dark were 2 times higher, and stabled for over 2 months. Therefore, the environmental impacts of EPFRs in dark may be widespread and long-lasting, which should be monitored more carefully. It should be noted that for CuO-coated silica, a significant amount of EPFRs (20% of the maximum) survived the UV-light irradiation and stabled during the experimental period (45 d). Stronger EPFRs were associated with more abundant dimer structures, suggesting the dimer structures were related to EPFRs formation during catechol degradation. Monitoring the generation of dimer structures in the degradation of organic chemicals may provide useful information to estimate EPFRs generation and risks.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Mengistu Tadesse Mosisa,Pengkun Zhang,Zhengjie Su,Binghong Wu,Longyan Chen,Yiqiang Liao,Ambar Farooq,Dongfang Lu,Adugna Boke Abdeta,Dong-Hau Kuo,Jinguo Lin,Xiaoyun Chen
Organic pollutants in industrial and agricultural wastewater can be dangerous to both human health and the environment. Therefore, it is important to develop methods for continuous catalytic reduction of these pollutants under dark conditions as sunlight has geographical and temporal limitations due to different regions, weather conditions, and Earth's rotation . This could have significant implications for practical wastewater treatment . In this study, we successfully synthesized bimetallic vanadium bismuth oxy-sulfo bromide (labeled as VBiOSBr) catalysts using a simple precipitation method by doping V/S into BiOBr to from (Bi,V)(S,O)Br. The morphology, structure, optical absorption properties, electron-hole recombination rate, and reduction performance of the catalysts were examined in detail. The catalyst displayed a tetragonal phase with an energy band gap and specific surface area of approximately 1.93 eV and 22.1 m 2 /g, respectively. The 1-VBiOSBr catalyst prepared with n (V): n (Bi): n (KBr): n (C 2 H 5 NS) = 1: 1: 1: 1 had the best catalytic activity . Within just 14 min, this catalyst removed 98.7% and 96.96% of 4-NP and Cr 6+ , respectively. The VBiOSBr catalyst remained stable and efficient even after the seventh run, still achieving a removal rate of 94.7%. The study proposed a possible mechanism for 4-NP and Cr 6+ reduction activity. The catalyst's simple manufacturing process and its ability to reduce pollutants under dark conditions make it a promising system for practical application in the continuous removal of organic pollutants. So, the VBiOSBr bimetallic catalyst has great potential as a candidate for wastewater treatment technologies.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Suzhou Xu,Can Liu,Xuping Jiang,Xinyu Wang,Shijin Zhang,Yanting Zhang,Qingguo Wang,Weiling Xiong,Jing Zhang
The performance and mechanisms of a titanium carbide (Ti 3 C 2 ) MXene modified Fe 3+ /hydrogen peroxide (H 2 O 2 ) system were compared in detail under dark and visible light conditions, with a new mechanism proposed for the reaction and reduction of MXene by Fe 3+ . Using Bisphenol A (BPA) as the target pollutant, the degradation of BPA by the Fe 3+ /H 2 O 2 system was improved after adding MXene in the dark, and the degradation rate of BPA was ≥ 95 % within 12.5 min under visible light, six times higher than that in the dark. Fe 2+ was ascertained to be the effective component responsible for H 2 O 2 activation to produce ·OH. SEM , XPS, ICP, XRD, and FTIR spectroscopy , analyses show that MXene and Fe 3+ form a complex, and then MXene reacts with Fe 3+ by breaking the Ti–C bonding to accelerate the Fe 3+ /Fe 2+ cycle. MXene uses photogenerated electrons to promote this reaction under visible light. In addition, quenching experiments and electron spin resonance spectroscopy results show that ·OH and O 2 •− are the main reactive oxygen species under visible light, while ·OH is the main active species in the dark. MXene thus effectively uses O 2 to form O 2 •− under visible light and promotes the Fe 3+ /Fe 2+ cycle. This study provides a theoretical basis for the combination of visible light catalysis and the advanced oxidation process of a Ti 3 C 2 MXene.
研究领域:
环境科学
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化学工程
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材料科学
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高级氧化过程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2022
·
IF 6.796
Zhexin Zhu,Wenjie Qian,Zhiguo Shang,Xiaoji Ma,Zhendong Wang,Wangyang Lu,Wenxing Chen
The monoaminotrinitro iron phthalocyanine (FeMATNPc) is used to connect with isonicotinic acid (INA) for amide bonding and axial coordination to synthetic a unique catalyst FeMATNPc-INA, which is loaded in polyacrylonitrile (PAN) nanofibers by electrospinning. The introduction of INA destroys the π-π conjugated stack structure in phthalocyanine molecules and exposes more active sites. The FeMATNPc-INA structure is characterized by X-ray photoelectron spectroscopy and UV-visible absorption spectrum , and the FeMATNPc-INA/PAN structure is characterized by Fourier transform infrared spectroscopy and X-ray diffraction. The FeMATNPc-INA/PAN can effectively activate peroxymonosulfate (PMS) to eliminate carbamazepine (CBZ) within 40 minutes (PMS 1.5 mmol/L) in the dark. The effects of catalyst dosage, PMS concentration, pH and inorganic anion on the degradation of CBZ are investigated. It has been confirmed by electron paramagnetic resonance, gas chromatography–mass spectroscopy and free radical capture experiments that the catalytic system is degraded by • OH, SO 4 •− and Fe (IV) = O are the major active species, the singlet oxygen ( 1 O 2 ) is the secondary active species. The degradation process of CBZ is analyzed by ultra-high performance liquid chromatography-mass spectrometry and the aromatic compounds have been degraded to small molecular acids.
研究领域:
环境科学
·
化学工程
·
材料科学
·
分析化学
✓ 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）