Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yingjie Guo,Jiayi Yan,Zan Chen,Cuijia Duan,Claudia Li,Yinhui Li,Sibudjing Kawi
The tendency of small-sized covalent organic framework (COF) nanoparticles to easily agglomerate, and the propensity of photo-generated carriers in α -Fe 2 O 3 to recombine pose challenges in the efficient removal of tetracycline (TC) through adsorption-photocatalysis synergy. This study addresses these challenges by introducing MIL-101, known for its excellent chemical stability and large specific surface area. The amino functional group facilitates the in-situ growth of acyl chloride-covalent organic framework (AC-COF) on the surface of MIL-101, resulting in the fabrication of AC-COF@MIL-101 with a core-shell structure. Loading α -Fe 2 O 3 through structural regulation leads to the preparation of the final α -Fe 2 O 3 /AC-COF@MIL-101 ternary nanocomposite. In α -Fe 2 O 3 /AC-COF@MIL-101 composites, the high surface energy of AC-COF is mitigated by the strong chemical energy of N C-N, reducing AC-COF aggregation and decreasing the recombination rate of photogenerated carriers in α -Fe 2 O 3 . The heterojunction structure between AC-COF@MIL-101 and α -Fe 2 O 3 enhances the degradation of TC, attributed to the synergistic effect of adsorption and photocatalysis. Experimental results demonstrate that α -Fe 2 O 3 /AC-COF@MIL-101 has a maximum adsorption capacity of 135.14 mg/g, achieving a 100% TC removal rate within 30 min. Compared to AC-COF, MIL-101, and α -Fe 2 O 3 , α -Fe 2 O 3 /AC-COF@MIL-101 exhibits higher adsorption capacity and photocatalytic activity. Specifically, its adsorption capacity is 2.1 times that of AC-COF, 1.8 times that of MIL-101, and 10.6 times that of α -Fe 2 O 3 . Additionally, its degradation ability is 8.6 times that of α -Fe 2 O 3 . The adsorption of TC by α -Fe 2 O 3 /AC-COF@MIL-101 occurs through monolayer chemical adsorption, and the process is exothermic. The main active species involved in the photocatalytic degradation process are h + and ·OH. This study introduces a new ternary composite multifunctional material with high adsorption and photocatalytic performance for TC, offering a potential strategy for enhancing the synergistically adsorption-photocatalytic effect in ternary composite systems.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Rongyan Yin,Yinhui Li,Weidong Li,Fei Gao,Xiao Chen,Tingyu Li,Jianguo Liang,Hulin Zhang,Haifeng Gao,Pengwei Li,Yunlei Zhou
High-temperature sensors are critical in petrochemical, aerospace, and automotive industries. However, the inorganic piezoelectric materials for high-temperature sensors are usually rigid and only can work in low temperatures due to their low Curie temperature (< 200 °C), which restricts these sensors for high-temperature application. Herein, we report a high-temperature piezoelectric sensor based on PAN/Zn(Ac) 2 composite nanofiber mat created via electrospinning and thermal-oxidative stabilization process, which can continuously work over 500 °C. Moreover, the heat-treatment PAN is first found to be pyroelectric. The effects of the different heat-treatment temperatures on the mechanical and electrical performance of PAN/Zn(Ac) 2 composite nanofiber mats are studied systematically. The maximum voltage output of the PAN/Zn(Ac) 2 composite film sensor is 14.13 V at room temperature, and the voltage output of the composite film (450 ℃ heat-treated) sensor is about 14.86 V at high temperature. Besides, it has durability for over 10000 cycles (room temperature), and it has durability for over 5000 cycles and stability after 60 days (400 ℃). The PAN/Zn(Ac) 2 composite nanofiber film also showed a linear voltage response to the thermal gradient, but the pyroelectric output of the PAN/Zn(Ac) 2 composite nanofiber film is independent of the heat treatment temperature. The PAN/Zn(Ac) 2 composite film sensor can charge a capacitor and can instantly drive small electronic devices when the capacitor discharges, and the PAN/Zn(Ac) 2 composite film sensor can be applied to fire safety. Overall, good flexibility, high-temperature resistance, and bifunctional sensing ability make PAN/Zn(Ac) 2 -type sensors expected to be widely used in the high-temperature field of fire safety, the automotive industry, and other harsh environment.
研究领域:
材料科学
·
传感器技术
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能源与环境
✓ 已验证
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2021
·
IF 5.89
Zhou Li-Jian,Guo Li-Bin,Wei Wei,Lv Zhi-Xiang,Zhang Ye-Wang
Chondroitin AC lyase (ChSaseAC) is one of the essential polysaccharides lyases in low molecular chondroitin sulfate production. In this work, a novel PrChSaseAC from Pedobacter rhizosphaerae was successfully cloned, expressed in Escherichia coli. After optimizing the induction, the recombinant PrChSaseAC could be expressed efficiently at 0.1 mM IPTG, 25°C, and 12 h induction. Then, it was purified with Ni-NTA affinity chromatography. The characterization of the purified PrChSaseAC showed that it had high specific activity and good storage stability, which would favor the production of low molecular weight chondroitin sulfate. It also displayed activity toward chondroitin sulfate C and hyaluronic acid. PrChSaseAC had the highest activity at pH 7.5, 37°C, 10 mM Ca2+, and 5 mg/ml of chondroitin sulfate A. Molecular docking of substrate and enzyme showed the interactions between the enzyme and substrate; it revealed that the enzyme showed high activity to CS-A and hyaluronic acid, but lower activity to CS-C attributed to the structure of the binding pocket. The high stability and specific activity of the enzyme will benefit the industrial production or clinical treatment.
研究领域:
生物化学
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酶学
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生物技术
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药理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yanchun Li,Weiyang Zhang,Xiaona Li,Hongwei Kang,Baocheng Yang,Zhikun Li
Transition metal sulfides are considered attractive electrode materials for energy storage and conversion devices due to their excellent electrochemical activity, especially for cobalt-based sulfide with low-cost, high stability and high specific capacity. Herein, we successfully synthesized a novel nanocomposite of carbon nanotube and activated carbon co-modified non-stoichiometric cobalt sulfide (Co 1−x S@CNTs/AC) by a facile solvothermal method. Benefiting from the positive effects of CNTs and AC materials on the growth and nucleation of Co 1−x S materials, as well as the construction of carbon materials that facilitate fast ion/electron diffusion and transport channels, the as-fabricated optimal Co 1−x S@CNTs/AC electrode exhibits a high specific capacitance of 656.51 F g −1 at 0.6 A g −1 and an excellent rate capability, showing significantly better electrochemical properties than bare Co 1−x S, Co 1−x S@CNTs, and Co 1−x S@AC electrodes. Besides, the assembled Co 1−x S@CNTs/AC//AC hybrid supercapacitor delivers an excellent energy density of 20.50 Wh kg −1 at a power density of 241.26 W kg −1 , and a satisfactory cycling stability of 95.96% capacitance retention after 16,000 cycles at 80 mV s −1 . These excellent electrochemical properties demonstrate that the integrated electrode material modified with carbon material is a promising candidate for desiring high-performance green energy storage devices.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
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IF 19
Zheng Zhang,Laifa Shen,Xin Xu,Yang Liu,Tianyu Xia,Zhen Zhu,Jiayi Xu,Jing Wang,Qi Wu,Kang Yan,Jinsong Liu,Hao Dong,Kongjun Zhu
With the rapid advancements in global electric aircraft and energy storage, the integration of carbon-fiber composite structures with energy storage technology has become a prominent topic. An AC&GO carbon fiber structural supercapacitor is designed by integrating the high specific surface area of AC with the excellent mechanical properties of GO, achieving a balanced mechanical and electrochemical performance. This supercapacitor exhibits high stability in charge–discharge characteristics, showing a capacitance of 75.79 mF cm −2 at a current density of 0.05 mA cm −2 and an energy density of 236.85 mWh m −2 . In addition, the maximum power density is 22.59 W m −2 at a current density of 1 mA cm −2 . The capacitance retention and coulombic efficiency are 98.99% and 96.52%, respectively, after 10 000 charge–discharge cycles at a current density of 0.2 mA cm −2 . Furthermore, after 15 000 cycles under load-bearing and tensile conditions at a current density of 0.2 mA cm −2 , the capacitance retention is 98.52% and 93.05%, respectively, with the tensile strength remaining above 90% compared with non-energy storage components. The multifunctional efficiency reaches 1.28, indicating the mechanical load bearing and electrochemical energy storage of AC&GO, thereby demonstrating its application potential in aerospace.
研究领域:
储能技术
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材料科学
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航空航天工程
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Huiping Zeng,Xiao Sun,Jie Zhang,Dong Li
The removal of dissolved organic matter from secondary effluent in sewage treatment is a significant challenge, necessitating the development of green and efficient composite magnetic materials for coagulation. In this study, activated carbon-modified magnetite nanoparticles (AC@MNPs) were synthesized via one-step activation pyrolysis using iron sludge as a precursor. The ballast coagulation process employed AC@MNPs as both magnetic species and adsorbent, with polymeric aluminum chloride (PACl) as a coagulant, for advanced treatment of secondary effluent. A response surface methodology identified optimal pyrolysis conditions: an activation ratio (KOH/ST) of 1.2, a pyrolysis time of 1 h, and a temperature of 640 °C. The influence of pyrolysis temperature (600 ∼ 700 °C) on the morphology and pore characteristics of AC@MNPs was investigated, highlighting its significance in coagulation performance. Characterization through XRD, VSM, and FTIR confirmed the favorable settling properties of the composite magnetic flocs and recyclability of AC@MNPs. Coagulation experiments revealed a synergistic effect of AC@MNPs and PACl, enhancing the removal of UV 254 and COD from 33.4 % and 36.2 % (with PACl alone) to 74.02 % and 76.53 %, respectively. The overall performance of the ballast coagulation process was evaluated, demonstrating effective removal of organics of various molecular weights. Finally, the coagulation mechanism was systematically discussed. Overall, this research offers insights into the application of magnetic coagulation technology for wastewater treatment advancements.
研究领域:
环境科学
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污水处理
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 21
·e01335
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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
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Ying Liu,Lei Zhang,Shixiang Feng,Xi Chen
A series of RuNi bimetallic catalysts supported on activated carbon were prepared to study the reductive amination of lactic acid. Among the tested catalysts, the catalyst containing 40% Ni and 60% Ru was selected as the optimal catalyst. The yield of alanine significantly increased to 64% using the Ru6Ni4 catalyst supported on an activated carbon, which was 1.5 times that using the monometallic Ru catalyst supported on an activated carbon. A number of characterization methods such as transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction (TPR) were used to characterize monometallic and bimetallic catalysts. The strong electron transfer between Ni and Ru and the highly dispersed structure of metal on the surface of the support contributed to the excellent catalytic performance of Ru6Ni4. The Ru6Ni4 catalyst supported on activated carbon also exhibited good activity in the reductive amination of other α-hydroxyl acids to corresponding amino acids.
研究领域:
催化
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
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
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 15
·3273
·
IF 5
Bifeng Fan,Junjie Yang,Lin Cao,Xiao Wang,Jie Li,Yingfei Yang,Qiwei Wang,Peng Zhang,Florin Vogel,Wei Li,Zhidan Lin
Due to green development in recent years, water-borne epoxy resins (WBE) have become increasingly popular since they generate the lowest level of volatile organic compounds (VOC) during curing. However, because of the large surface tension of water, it is easy to produce voids and cracks during the curing process of the coating. An electrochemical strategy was used in this study to assess the impact of different SiO2content on the corrosion performance of a WBE coating, in which micron spherical SiO2particles were synthesized in a liquid phase reduction. The results showed that the synthesized micron spherical SiO2particles were about 800 ± 50 nm in diameter and in an amorphous state. By hydrophilizing the surfaces of these SiO2particles, uniform dispersion in an aqueous solvent and a WBE can be achieved. It is important to note that adding a small or excessive amount of SiO2to a coating will not improve corrosion resistance and may even reduce corrosion resistance. With the appropriate modification of SiO2, corrosion resistance of composite coatings is greatly enhanced, as is the adhesion between the coatings and the metallic substrates. Because the appropriately modified SiO2can effectively fill the pores that are formed during the curing process, a corrosive medium is less likely to react with the matrix when the medium comes into contact with the matrix. Based on their incorporation content of 3 wt.%, their corrosion resistance is the best after 16 cycles of AC-DC-AC accelerated corrosion tests.Keywords:water-borne epoxy resin;micron SiO2filler;corrosion resistance;AC-DC-AC test
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Shaoru Liu,Weizi Zhang,Peng Zhu,Songlin Zuo,Haian Xia
The study reports a facile synthesis of Ag-g-C 3 N 4 /AC composites with highly photocatalytic activity and good adsorption capacity by an impregnation-thermal polycondensation process. The resulting Ag-g-C 3 N 4 /AC composites were used for treatment of different pollutants in water including Rhodamine B (RhB), Cr(VI) ions and pathogens . When the precursor mass ratio of urea and AC was 2:2, the resultant Ag-g-C 3 N 4 /AC catalyst showed the best photocatalytic performances. In particular, the composite photocatalysts exhibited highly bactericidal efficiency, which could reach 99.9% after 120 min of irradiation. The higher photocatalytic performances of Ag-g-C 3 N 4 /AC composites were attributed to the surface plasmon resonance (SPR) effect of Ag nanoparticles (NPs) together with the interfacial synergistic effects. Meanwhile, AC not only exhibited excellent adsorption capacity, but also decreased aggregation of g-C 3 N 4 , which could enhance the separation efficiency of photogenerated charge carriers. It was uncovered through Electron Spin Resonance (ESR) and radical scavenger experiments that • OH radicals, • O 2 − and h + participate in the RhB degradation under the visible light. This work shows that the high-efficient and stable Ag-g-C 3 N 4 /AC composites have a great potential in the treatment of organic pollutants , toxic heavy metals and pathogenic bacteria by adsorption/photocatalysis for practical water treatment .
研究领域:
环境科学
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材料科学
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化学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2022
·Vol. 19
·期 24
·16879
·
IF 4.614
Tong Li,Zhibo Wang,Yue Shi,Xiaolong Yao
Based on the porous carbon material from citric acid residue, catalysts of different Ce-Mn ratios were prepared with incipient-wetness impregnation (IWI) to delve into their acetone-degrading performance and relevant mechanisms. When the Ce-Mn molar ratio is 0.8, the prepared catalyst Ce0.8-Mn/AC shows abundant and uniformly dispersed Mn and Ce particles on the surface. The content of Mn and Ce on the Ce0.8-Mn/AC surface reaches 5.64% and 0.75%, respectively. At the acetone concentration of 238 mg/m3(100 ppm), the laws of acetone degradation in different catalysts at different catalyzing temperatures and with various oxygen concentrations were studied, and we found that the rate of acetone degradation by Ce0.8-Mn/AC can exceed 90% at 250 °C. Cerium oxide and manganese oxide are synergistic in the catalytic degradation of acetone. Adding cerium to manganese-based catalysts can increase the oxygen migration rate in the catalysts and thus raise the reduction rate of lattice oxygen in manganese oxide. The results offer new ideas and approaches for the efficient and comprehensive utilization of bio-fermentation by-products, and for the development of cheap and high degradation performance catalysts for acetone.Keywords:acetone;Ce0.8-Mn/AC;efficient degradation;low temperatures
研究领域:
环境科学
·
催化材料
✓ 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）