Journal of Inorganic and Organometallic Polymers and Materials
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2024
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IF 3.9
Zhao Jingru,Wei Zifei,Sun Linan,Wang Ying,Wu Xiaodan,Wang Tao,Wang Zihan,Fu Yujie
Heavy metal ions contain highly toxic and non-biodegradable wastewater pollutants seriously contaminating the environment and affecting human health. Removal of heavy metal ions from the environment is a vital step towards the elimination of water pollution on a global scale. Therefore, in this study, cellulose was modified with L-cysteine, sodium alginate and polyethyleneimine to produce cellulose/sodium alginate /polyethyleneimine/L-cysteine composite hydrogel microspheres (WCMs/SA/PEI/L-Cys) in order to efficiently adsorb heavy metal ions. Co(II) and Ni(II) are successfully removed from water. After their production, the sorbents underwent examination using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and Scanning electron microscopy (SEM). In addition, the investigation of the mechanism and adsorption characteristics of cellulose-modified gel microspheres WCMs/SA/PEI/L-Cys has been completed. The majority of the adsorption of contaminants by cellulose-modified gel microspheres WCMs/SA/PEI/L-Cys adhered to the Langmuir isothermal adsorption model and quasi-secondary kinetic model. The intra-particle diffusion model was adopted for improving the fitting of the adsorption process in the materials. It was indicated that the internal and external diffusion acted together to eliminate the contaminants from the materials. When exploring the decontamination mechanism of the materials using XPS, it was shown that the functional groups containing nitrogen, oxygen and sulfur play a key role in removing contaminants. For Co(II) and Ni(II), the highest adsorption capacities of the sorbent were 358 and 373 mg/g, respectively. The material exhibited robust stability and recyclability based on the regeneration experiment results, remaining stable after six adsorption cycles and retaining over 80% of the initial adsorption amount.
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
高影响因子
RSC Advances
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2024
·Vol. 14
·期 35
·25247-25255
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IF 3.9
Ruina Xuan,Jieqiong Mo,Jiwen Chen,Yixin Dou,Xiaofang Li,Zhuo jiang,Bo Chai,Chunlei Wang,Deng Ding,Juntao Yan,Xiaobo Wang
Photocatalytic CO2 reduction into value-added chemical fuels using sunlight as the energy input has been a thorny, challenging and long-term project in the environment/energy fields because of to its low efficiency. Herein, a series of CdS/Co-BDC composite photocatalysts were constructed by incorporating CdS nanoparticles into Co-BDC using a dual-solvent in situ growth strategy for improving photocatalytic CO2 reduction efficiency. The composites were characterized through XRD, SEM, TEM, XPS, DRS and EPR techniques in detail. 18% CdS/Co-BDC composites showed superior performance for the photocatalytic CO2 reduction to CO, which was 8.9 and 19.6 times higher than that showed by the pure CdS and Co-BDC, respectively. The mechanism of enhanced photocatalytic CO2 reduction performance was analyzed. The CdS/Co-BDC composites showed better adsorption for CO2. Detailed analysis of XPS, transient photocurrent responses, and electrochemical impedance spectroscopy (EIS) shows the existence of strong charge interaction between CdS and Co-BDC and the photo-electrons of CdS can be transferred to Co-BDC. Additionally, Co-oxo of Co-BDC plays the role of a redox-active site and promotes the reduction performance via the method of valence transition of Co(II)/Co(III) redox.
研究领域:
环境科学
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能源科学
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材料科学
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
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2023
·Vol. 190
·期 4
·1-9
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IF 5.7
Tu Xinman,Deng Lamei,Ren Boyuan,Xu Zihan,Zhang Li
A conventional colorimetric method based on CuS-catalyzed H 2 O 2 is improved by a dual-modification strategy and employed for thioglycolic acid (TGA) determination. The doping of Co(II) can enhance ion exchange efficiency. Meanwhile, the modification of g-C 3 N 4 can increase specific surface area and decrease unspecific aggregation. The constructed g-C 3 N 4 /Co-CuS nanocomposite exhibited a favorable catalytic feature. A Michaelis constant (K m ) value of 0.02 mM has been achieved, which is 1/160 of those of CuS and horseradish peroxidase (HRP). The g-C 3 N 4 /Co-CuS displays a rapid color response in 3 min and resulted in a stable measurable signal within 10 min. In the determination procedure, the sulfhydryl contained in TGA is capable of preventing TMB oxidation via competing the · OH produced by catalysis and caused a color distinction that is related to the TGA amount. The distinctions of absorbance (λ max = 652 nm) of different concentrations of TGA are recorded. Linearity is obtained in the ranges of 2.5 – 20 µM and 20 – 160 µM, and the LOD is 0.14 µM. In the real sample assays of perm agent and Qianhu lake water, the recoveries were 96.70 – 106.84% and 100.21 – 101.90%, respectively. This demonstrates that the proposed dual-modification strategy for CuS contributes to highly efficient and convenient determination of TGA in daily cosmetics and water analysis. Graphical Abstract
研究领域:
分析化学
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材料科学
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环境科学
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化妆品科学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2022
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IF 6.14
Le Zhang,Xin Zhou,Shaohua Chai,Jian Guan,Guijun Fan,Wuxinchen Yang,Guojun Ma,Ning Han,Yunfa Chen
There is a high demand to synthesize ozone decomposition catalysts especially in high-space-velocity and high-relative-humidity (RH) environments. Herein, two polymorphs of cobalt hydroxide, α- and β-Co(OH)2, are synthesized and applied for ozone elimination. β-Co(OH)2 shows ∼90% ozone decomposition efficiency under high space velocity (weight hourly space velocity (WHSV) = 1,200,000 mL g–1 h–1, 25 °C, 40 ppm), which is far higher than that of α-Co(OH)2 (∼5%). β-Co(OH)2 has high spin Co(II) in distorted octahedral coordination caused by the Jahn-Teller effect, leading to a higher crystal field splitting energy level and thus contributing to the easier electron transfer between the ozone and catalyst. Moreover, β-Co(OH)2 still shows high performance (∼87%) even in humid conditions (RH ∼50%, 25 °C, 40 ppm, WHSV = 600,000 mL g–1 h–1), which is attributable to its abundant surface non-hydrogen-bonded hydroxyls weakening water molecule adsorption, providing an idea to develop highly efficient catalysts for ozone decomposition in humid environments.
研究领域:
材料科学
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催化
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环境科学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2025
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IF 2.9
Zhenyi Chen,Shuo Li,Kun Feng,Zhen Wen,Jun Zhong
Low-level radioactive wastewater containing Co(II)–EDTA generated in the nuclear industry is harmful to the environment, but it is difficult to remove owing to the high stability of metal–organic complexes. Here, we report efficient contact-electro-catalysis (CEC) to achieve the decomplexation of Co(II)–EDTA by using commercial fluorinated ethylene propylene (FEP) powder as a dielectric catalyst. The reaction generated reactive oxygen species through solid–liquid interfacial charge transfer, disrupting the chemical bonds and then oxidizing the central atoms in Co(II)–EDTA to form Co(III)–EDTA with vacancies. The Co(III)–EDTA could be easily removed from the solution under alkaline conditions. The decomplexation efficiency reached a high value of 41.6%, with a constant reaction rate of 0.024 min−1 in 240 minutes. The FEP also exhibited excellent recyclability over 40 h without obvious changes. Unlike conventional advanced oxidation processes, this approach does not require the use of electrodes or chemical oxidants, leading to low energy consumption. This approach also holds great potential for green wastewater management via integration with ambient mechanical energy sources (e.g., wind and hydrostatic pressure).
研究领域:
环境科学
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核工程
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催化化学
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废水处理
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2019
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IF 2.12
Yun Li,Yueqin Li,Xiaohui Liu,Yong Yang,Dong Lin,Qinwei Gao
Two Co(II) complexes, Co(BBH)phenMeCN (1) and Co(BSH)phenMeCN (2) (HBBH = benzophenone benzoyl hydrazone, HBSH = benzophenone salicylylhydrazone ligand and phen = 1,10-phenanthroline) were prepared and characterized by single X-ray crystallography. The investigation of the complexes binding with herring sperm DNA (HS-DNA) revealed that stronger binding interaction exists between the complexes and HS-DNA compared to the corresponding free ligands. And both complexes can bind to DNA through intercalation of the phenyl rings between adjacent base pairs in the double helix. Meanwhile, bovine serum albumin (BSA) binding studies reveal the complexes can effectively interact with BSA and change the secondary structure of BSA. Superoxide dismutase (SOD) mimic activity of the complexes was investigated and the results showed that complex 2 showed a stronger radical scavenging potency against O 2 .- radical with an IC 50 value of 16.10 μM. The catecholase-like activity of both complexes has been investigated with 3,5-di- tert -butylcatechol (3,5-DTBC) as the substrate in methanol solution under completely aerobic conditions. The catalytic reaction follows Michaelis-Menten enzymatic reaction kinetics with turnover numbers ( k cat ) of 34.14 h −1 and 30.36 h −1 for complex 1 and complex 2, respectively.
研究领域:
配位化学
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生物无机化学
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药物化学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2013
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IF 3.41
Zhiguo Sun,Gang Li,Hai-ou Liu,Liping Liu
A series of MOF-based catalysts, metal-salen complexes incorporated into amino-functionalized MIL-101 matrices by salicylaldehyde condensing to amino group and coordinating metal ion through one pot method, have been prepared and characterized. The successful preparation of catalysts demonstrates that postsynthetic modification (PSM) is a practical and powerful route to generate MOF-based catalyst with multiple active sites. The catalytic performances of prepared catalysts were investigated via selective oxidation of cyclohexane to cyclohexanone and cyclohexanol (KA-oil) by molecular oxygen in the absence of solvent. It was found that NH 2 -MIL-101(Cr)-Sal-Co, as a typical case, behaves as cooperative catalyst for cyclohexane selective oxidation. That is, salen-Co(II) attached to framework of MOF is able to assist in the generation of new radicals from peroxides via a Haber–Weiss catalytic cycle to promote conversion of cyclohexane while framework Cr ion is able to catalyze the dehydration of intermediate product cyclohexyl hydroperoxide (CHHP) to improve KA-oil selectivity. Furthermore, this catalyst exhibits good recyclability and behaves as truely heterogeneous catalyst.
研究领域:
材料化学
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催化化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Feifei Liu,Yubin Zou,Hebin Liang,Jiahui Hu,Yin Li,Lin Lin,Xiaoyan Li,Bing Li
Peracetic acid (PAA) emerges as a promising disinfectant and oxidant applied worldwide, and its application has been broadened for advanced oxidation processes (AOPs) in wastewater treatment. Current studies on transition metal-activated AOPs utilized relatively high concentrations of catalysts, leading to potential secondary pollution concerns. This study boosts the understanding of reaction mechanism in PAA activation system under a low-level concentration. Herein, trace levels of Co(II) (1 μM) and practical dosages of PAA (50–250 μM) were employed, achieving noticeable ciprofloxacin (CIP) degradation efficiencies (75.8–99.0%) within 20 min. Two orders of magnitude of the CIP’s antibacterial activity significantly decreased after Co(II)/PAA AOP treatment, which suggested the effective ecological risk control capability of the reaction system. The degradation performed well in various water matrices and the primary reactive species is proposed to be CoHPO 4 -OO(O)CCH 3 complexes with scavenging tests and electron paramagnetic resonance tests. The degradation pathway of fluoroquinolones including piperazine ring-opening (dealkylation and oxidation), defluorination, and decarboxylation, were systematically elucidated. This study boosts a comprehensive and novel understanding of PAA-based AOP for CIP degradation.
研究领域:
环境科学
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化学工程
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水处理
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氧化过程
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2021
·
IF 6.707
Tiefeng Xu,Lulu Dong,Zhanghao Xu,Nan Li,Wenxing Chen,Wangyang Lu
Co-based hybrid organic–inorganic heterogeneous catalyst was prepared using cobalt tetraaminophthalocyanine (CoTAPc) as precursor via simple one-pot calcination under oxidizing atmosphere, and characterized by X-ray photoelectron spectroscopy, transmission electron microscopy, X-ray absorption fine spectroscopy, etc. The results showed that the oxygen (O) atom was introduced into the Co(II)–N4 structure of CoTAPc, generating the active N–Co(II)–O centers with novel coordination environment around the ion of cobalt. This heterogeneous Co-based hybrid catalyst exhibits high catalytic activity and sufficient stability for the elimination of organic pollutants by H 2 O 2 activation, even in high backgrounds of complex constituents. Moreover, the controllable H 2 O 2 activation was achieved at relatively low H 2 O 2 dosage under mild condition. The possible mechanism of the heterolytic cleavage of O–O bond during H 2 O 2 activation was proposed, and such different cobalt coordination environment facilitated the formation of high active Co(IV) = O species. Besides, the oxidation pathway of substrates was presented according to the intermediates and the final products detected by ultra-performance liquid chromatography/high-definition mass spectrometry and gas chromatography/mass spectrometry, respectively.
研究领域:
环境科学
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催化化学
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材料科学
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产品关联
DOI
高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Jingxue Wang,Kang Sun,Denan Wang,Xinwei Niu,Zhongyuan Lin,Siyuan Wang,Weijie Yang,Jier Huang,Hai-Long Jiang
While the coordination environment around catalytic metal sites plays a crucial role in catalysis, its precise design and modulation still remain a challenge. Herein, the coordinated N atom number around single Co sites installed on a UiO-type metal–organic framework has been modulated to afford UiO-Co-Nx (x = 2, 3, and 4) for photocatalytic CO2 reduction. Significantly, the photocatalytic performance is affected by the coordinated N atom number around the Co site, in which UiO-Co-N3 exhibits superior activity to the other counterparts. Photo-/electrochemical results support the fastest charge transfer kinetics between the photosensitizer and UiO-Co-N3. Theoretical calculations, together with the results acquired from in situ diffuse reflectance infrared Fourier transform spectra, manifest the lowest energy barriers of the rate-determining step and desorption energy of CO* over UiO-Co-N3 among all UiO-Co-Nx samples.
研究领域:
化学
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材料科学
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催化
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环境科学
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产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 21
·e01335
·
IF 2
Yu-cheng Jiang,Bao-guang Zhu,Xiang-li Long
Graphical The production of 1-(4-chlorophenyl)-1H-pyrazol-3-ol from the oxidation of 1-(4-chlorophenyl)-pyrazolidin-3-one by air under the catalysis of Co(II)@AC has been enhanced by modifying the activated carbon with H₂C₂O₄ solution to increase the acidic groups and micropores on the carbon surface. The production of 1-(4-chlorophenyl)-1 H -pyrazol-3-ol by oxidizing 1-(4-chlorophenyl)- pyrazolidin-3-one with H 2 O 2 suffers from some shortcomings. The oxidation of 1-(4-chlorophenyl)-pyrazolidin-3-one to 1-(4-chlorophenyl)-1 H -pyrazol-3-ol can be realized by air catalyzed with Co(II)@AC (prepared by supporting cobalt(II) on activated carbon). Air is a good substitute for H 2 O 2 because it can minimize the cost, hazards, and pollution, which is beneficial to the improvement of the production process for pyraclostrobin. In this study, activated carbon has been modified by H 2 C 2 O 4 solution to improve the catalytic performance of Co(II)@AC. The experiments indicate that the best carbon is made by heating the carbon at 300 °C for 3 h with a heating rate of 5 °C/min in N 2 after being soaked in 0.4 mol/L H 2 C 2 O 4 solution at 50 °C for 12 h with an L/S ratio of 40/1 mL/g. The 1-(4-chlorophenyl)-1 H -pyrazol-3-ol concentration obtained by Co(II)@AC immobilized on the optimized carbon is 39.39% over that catalyzed by Co(II)@AC loaded on the original carbon. Characterization results reveal that modification with H 2 C 2 O 4 increases the specific surface area and enhances the acidity on the carbon surface. The oxidation rate of 1-(4-chlorophenyl)-pyrazolidin-3-one is primarily determined by the physical structure. The selectivity toward 1-(4-chlorophenyl)-1 H -pyrazol-3-ol is mainly influenced by the chemical characteristics.
研究领域:
化学工程
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催化材料
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Hanbang Liu,Liping Yang,Danhua Yuan,Guangye Liu,Jiacheng Xing,Yunpeng Xu,Zhongmin Liu
For air separation, the separation method relying on adsorbents has attracted wide attention as a low energy consumption process, and the development of O 2 -selective adsorbents is of great significance. Metal-organic frameworks with coordinatively unsaturated transition metal sites have great potential in O 2 -selective adsorption, but most of them cannot be completely regenerated at ambient temperature or can only be effective at very low temperatures. Herein, we report two mixed-ligand metal–organic framework adsorbents [M(AIP)(BPY) 0.5 ·H 2 O] n ·2nH 2 O with coordinatively unsaturated cobalt(II) and nickel(II) sites, which can preferentially adsorb O 2 versus N 2 , and their IAST O 2 /N 2 selectivities are both significantly greater than 1 at 25 °C. These materials exhibited excellent stability and had no loss of adsorption capacities even after immersion in water for 7 days. More importantly, O 2 adsorption–desorption cycle experiments showed that these adsorbents can be completely regenerated at ambient temperature after adsorbing O 2 , and the breakthrough experiments further confirmed their dynamic O 2 /N 2 separation potential and regeneration ability. The results of theoretical calculations suggested that the interactions between adsorbents and O 2 are stronger than those of N 2 , and they have relatively obvious differences in the N 2 and O 2 interaction energies. This work provides inspirations for searching for metal–organic frameworks that can selectively adsorb O 2 at ambient temperature.
研究领域:
材料科学
·
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）