CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Miaoling Chen,Yu Chen,Zhengyuan Zhou,Purui Lin,Minhua Su,Jiacheng Min,Kaimin Shih,Ying Zhou
Radioactive strontium (Sr 2+ ) and cobalt (Co 2+ ) in nuclear wastewater pose significant environmental risks, leading the need of developing effective remediation strategies. In this study, a poly (triazine imide) (PTI) composite intercalated with bromide (Br − ), referred to as PTI/LiBr, synthesized via a molten salt method, is introduced as a novel adsorbent for the removals of Sr 2+ and Co 2+ . PTI/LiBr composite exhibited rapid adsorption and high efficiency for both radionuclides, driven by electrostatic interactions and partial exchange of Li + ions. The removal efficiency for Sr 2+ and Co 2+ exceeded 95 % within 30 min. Adsorption kinetics followed a pseudo-second-order model, while isotherm analysis indicated that Sr 2+ adsorption aligned with the Freundlich model and Co 2+ adsorption followed the Langmuir model. The adsorption process was confirmed to be spontaneous and endothermic. The γ-radiation tolerance tests verified the structural stability and high adsorption efficiency of the material under ionizing radiation conditions. Additionally, DFT-based wave function and charge density analyses showed a stronger and more stable interaction between PTI/LiBr and Co 2+ compared to Sr 2+ , which might be driven by favorable magnetic interactions and significant charge transfer. This study highlights the potential of PTI/LiBr as a robust and efficient adsorbent for mitigating radioactive pollutants in complex aqueous environments.
研究领域:
环境科学
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材料科学
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核废物处理
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吸附技术
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化学工程
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放射化学
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水污染控制
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DOI
高影响因子
MICROCHIMICA ACTA
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2018
·Vol. 185
·期 10
·1-11
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IF 5.705
Tang Jing,Jiang Sixun,Liu Yu,Zheng Shengbiao,Bai Lei,Guo Jiahao,Wang Jianfei
A composite was prepared from a Co(II)-based zeolitic imidazolate framework (ZIF-67) and graphene oxide (GO) by an in situ growth method. The material was electrodeposited on a glassy carbon electrode (GCE). The modified GCE was used for the simultaneous voltammetric determination of dopamine (DA) and uric acid (UA), typically at working potentials of 0.11 and 0.25 V (vs. SCE). The morphology and structure of the nanocomposite were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. The modified electrode exhibits excellent electroanalytical performance for DA and UA owing to the synergistic effect of the high electrical conductivity of GO and the porosity of ZIF-67. By applying differential pulse voltammetry, a linear response is found for DA in the 0.2 to 80 μM concentration range, and for UA between 0.8 and 200 μM, with detection limits of 50 and 100 nM (at S/ N = 3), respectively. Further studies were performed on the effect of potential interferents, and on electrode stability and reproducibility. The modified GCE was applied to the simultaneous detection of DA and UA in spiked human urine and gave satisfying recoveries.
Schematic of the preparation procedure of GO-ZIF67 and electrochemical reaction mechanisms of UA and DA at the GO-ZIF67-modified glassy carbon electrode (GCE). GO: graphene oxide; ZIF-67: Co(II)-based zeolitic imidazolate framework.
研究领域:
分析化学
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电化学
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纳米材料
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
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IF 2.369
Yang Zeng,Tu Lan,Min Li,Guoyuan Yuan,Feize Li,Jiali Liao,Jijun Yang,Yuanyou Yang,Ning Liu
A comparative study on the ortho-, meta-, and para-substituted pyridyl groups on the functional motifs of zirconium-based metal–organic frameworks (MOFs) for removing cobalt ions from aqueous solutions was performed. The maximum adsorption capacity of cobalt ions on the ortho-substituted MOF was estimated to be 100.0 mg g–1 at pH 8.0, which was much higher than those of meta- and para-substituted MOFs. The thermodynamic and kinetic experiments showed that the adsorption was a spontaneous, endothermic, and pseudo-second-order process. The modified MOFs were also demonstrated to have the outstanding regenerated ability by the reusability study. The adsorption mechanism probed by density functional theory calculations indicated that the ortho-substituted pyridine Schiff base can take cobalt ions from both [Co(H2O)6]2+ and [Co(CHES)·(H2O)4]+ to form the bidentate complex [CoLP2·(H2O)4]2+, whereas only monodentate complexes could be formed for the other two modified MOFs by substituting one water molecule of [Co·(H2O)6]2+, which were further confirmed by X-ray photoelectron spectroscopy. This work compares the removal performance of Co(II) from aqueous solutions by the ortho-, meta-, and para-substituted pyridine Schiff bases and provides a guiding route to design and synthesize effective functionalized MOFs for the removal of heavy metals and radionuclides.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Huanxuan Li,Yucheng Lou,Junting Zheng,Liya Su,Shun Lu,Chen Xu,Jingang Huang,Qingwei Zhou,Junhong Tang,Mingzhi Huang
The importance of new water purification technology for maintaining clean water resources and a high quality of life is self-evident. In this study, amino functionalized bimetallic metal-organic frameworks (NH 2 -MIL-101(FeCo)) were prepared to activate peroxymonosulfate (PMS) for removal of organic pollutants from water. The structure, morphology, and physicochemical properties of as-prepared NH 2 -MIL-101(FeCo) were comprehensively evaluated by X-ray diffraction, scanning electron microscopy, N 2 adsorption-desorption isotherms, and X-ray photoelectric spectroscopy. Degradation tests were performed to study effects of PMS concentration, catalyst dosage, initial pH, and common substances on the orange G (OG) removal. The acidic and alkaline conditions promoted the formation of mesoporous structures in NH 2 -MIL-101(FeCo) and enhanced the mass transfer processes to remove OG. 100% of OG was removed through a rate constant of 0.0711 min -1 within 45 min in NH 2 -MIL-101(FeCo)− 2/PMS/OG system, where 1 O 2 , SO 4 •− , and · OH played pivotal contributions in the OG removal. The catalytic activity of NH 2 -MIL-101(FeCo) originated from unsaturated metal sites of Fe(II) and Co(II). This work demonstrates a feasible strategy towards the synthesis of functional MOFs for removal of organic contaminants .
研究领域:
环境科学
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化学
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材料科学
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水处理
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DOI
高影响因子
ACS Applied Polymer Materials
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2022
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IF 4.855
Jinwei Teng,Lei Qu,Zhengqi Liu,Zihao Qin,Jing Xu,Zhongni Wang,Zhaosheng Hou
Designing a polymeric elastomer that exhibits superior tensile properties, as well as efficient self-healing ability at mild temperatures, remains challenging. This study reports a polyurethane elastomer that contains imine and metal coordination bonds, by a facile method. The linear polyurethane (HPPU), bearing pendant ligands of phenolic oxygen and imine groups, originates via two-step polycondensation of hexamethylene diisocyanate, polytetrahedrofuran, and 2-{[(2-hydroxyphenyl) methylene]amino}-1,3-propanediol. Upon incorporation of Co(II) into the polymeric matrix, HPPU becomes an elastomer (HPPU-Co) with a physical crosslinked structure by the formation of metal coordination bonds. The dynamic reversible Co(II)–ligand coordination bonds in the structure impart the HPPU-Co elastomers with autonomous self-healing capacity at mild temperatures, and the tensile properties are adjustable by controlling the Co(II)/ligand ratio. When the mole ratio of Co(II)/ligand is 1:2, the as-prepared elastomer (HPPU-Co-1/2) exhibits superior tensile properties (ultimate tensile strength: 48.7 MPa; elongation at break: 1678%; fracture toughness: 287.7 MJ m–3) as well as self-healing abilities and repeated healing at room temperature [healing efficiency: 99.7% for the first healing and 81.2% for the sixth healing (24 h)]. Furthermore, the HPPU-Co elastomers exhibit reversible solvatochromic behaviors: the film color changes from blackish-green to red-brown upon dipping into water. The design concept in this work is an approach to preparing multifunctional polyurethane materials. The resultant polyurethane elastomers have multiple useful features and show promise for many fields that require long functional lifetimes.
研究领域:
材料科学
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高分子化学
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机械工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Shizong Wang,Jianlong Wang
High efficient and stable activator is desired for the sulfate radical-based wastewater treatment. Cobalt sulfide and cobalt oxide have high catalytic activity for peroxymonosulfate (PMS), but poor stability. Here, a novel composite, nano Co 9 S 8 and CoO encapsulated by nitrogen and sulfur co-doped sludge-derived biochar (CoO/Co 9 S 8 @N-S-BC) was synthesized, characterized and applied for activating PMS. The results showed that CoO/Co 9 S 8 @N-S-BC can effectively activate PMS for sulfamethoxazole (SMX) degradation, and 0.08 mM of SMX could be completely degraded within 10 min. The influencing factors, such as pH, temperature, chloridion, carbonate and humic acid were investigated. The SMX degradation conformed to pseudo first-order kinetics with rate constant of 0.379 min −1 . Sulfate radicals (dominant) and hydroxyl radicals contributed to SMX degradation. Carbon defects, pyridinic N, quaternary N, the carbon atoms next to pyridinic N, C O groups, -C-S-C and Co(II), all contributed to PMS activation.
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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DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
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2025
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IF 1.9
Yu-cheng Jiang,Bao-guang Zhu,Xiang-li Long
The oxidation of 1-(4-chlorophenyl)-pyrazolidin-3-one to 1-(4-chlorophenyl)-1H- pyrazol-3-ol by air can be accelerated by the Co(II)@AC catalyst prepared by loading Co(II) on activated carbon with wet impregnation method. ZnCl 2 solution has been used to treat activated carbon to ameliorate the catalytic ability of Co(II)@AC catalyst. The experiments indicate that the optimal catalyst is made by immersing activated carbon in 0.7 mol/L ZnCl 2 solution at 50°C for 6 h with a liquid/solid ratio of 30/1 (mL/g) followed being calcined at 700°C for 5 h at a heating rate of 5°C/min under N 2 protection. The 1-(4-chlorophenyl)-1H-pyrazol-3-ol concentration catalyzed by the catalyst loaded on the best carbon reaches 0.01953 kg/L, which is 27.56% higher than that catalyzed by the catalyst loaded on the original carbon. The characterization results manifest that the modification with ZnCl 2 enriches the porous structure and increases the acidic groups on the surface of activated carbon. The conversion of 1-(4-chlorophenyl)-pyrazolidin-3-one is mainly determined by the physical structure of the activated carbon while the selectivity to 1-(4-chlorophenyl)-1H- pyrazol-3-ol is largely affected by the chemical characteristics of the activated carbon.
研究领域:
化学
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催化材料科学
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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）