ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2026
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IF 11.3
Wei Wen,Chunying Wang,Xudong Chen,Jingyi Wang,Fei Wang,Kai Li,Yan Zhang,Yaobin Li,Changbin Zhang,Wenpo Shan
The development of high-efficiency non-noble-metal catalysts for HCHO removal is of great significance in indoor air purification. Zeolitic imidazolate frameworks (ZIFs) are characterized by large specific surface areas, well-defined porous structures, and tunable electronic properties, making them suitable for constructing single-atom catalysts with adjustable coordination environments. In this study, three Co-ZIF materials with distinct morphologies were synthesized and subsequently pyrolyzed, yielding cobalt-based catalysts with varied coordination structures. Among these catalysts, the Co–N–C(F) primarily features atomically dispersed Co species coordinated with four N atoms, forming Co-N4 active sites. Theoretical calculations indicate that the Co-N4 coordination structure exhibits enhanced oxygen activation compared to metallic cobalt sites, which is crucial for the degradation of intermediate products in the oxidation of HCHO. The Co–N–C (F) catalyst demonstrates superior activity in HCHO oxidation to even most noble metal catalysts. During a 710 h continuous test at 15 °C, the catalyst maintained 100% HCHO removal efficiency without observable deactivation. Simulation experiments further confirmed its practical applicability, with the catalyst module able to degrade 1 ppm of HCHO to <0.07 ppm within 2 h at room temperature. This work provides valuable insights for the development of commercial nonprecious metal catalysts for HCHO oxidation.
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高影响因子
Materials
·
2023
·Vol. 16
·期 7
·2606
·
IF 3.4
Wei Cui,Jiahui Fang,Yuanyuan Wan,Xueyu Tao,Litong Guo,Qiyan Feng
In this study, an E-fenton oxidation system based on Co-N co-doped carbon nanotubes (Co-N-CNTs) was designed. The Co-N-CNTs system showed fast degradation efficiency and reusability for the degradation of rhodamine B (RhB). The XRD and SEM results showed that the Co-N co-doped carbon nanotubes with diameters ranging from 40 to 400 nm were successfully prepared. The E-Fenton degradation performance of Co-N-CNTs was investigated via CV, LSV and AC impedance spectroscopy. The yield of H2O2could reach 80 mg/L/h within 60 min, and the optimal voltage and preparation temperature for H2O2yield in this system was −0.7 V (vs. SCE) and 800 °C. For the target pollutant of RhB, the fast removal of RhB was obtained via the Co-N-CNTS/E-Fenton system (about 91% RhB degradation occurred during 60 min), and the •OH played a major role in the RhB degradation. When the Fe2+concentrations increased from 0.3 to 0.4 mM, the RhB degradation efficiency decreased from 91% to about 87%. The valence state of Co in the Co-N-C catalyst drove a Co2+/Co3+cycle, which ensured the catalyst had good E-Fenton degradation efficiency. This work provides new insight into the mechanism of an E-Fenton system with carbon-based catalysts for the efficient degradation of RhB.Keywords:carbon nanotubes;E-Fenton;rhodamine B;degradation;mechanism
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高影响因子
Journal of Energy Chemistry
·
2022
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IF 13.599
Hui Yang,Hao Chen,Wenhua Zhou,Haoan Fan,Chao Chen,Yixuan Sun,Jiaji Zhang,Sifan Wang,Teng Guo,Jie Fu
Hydrodeoxygenation of furfural (FF) into 2-methylfuran (MF) is a significant biomass utilization route. However, designing efficient and stable non-noble metal catalyst is still a huge challenge. Herein, we reported the N, O co-doped carbon anchored with Co nanoparticles (Co-SFB) synthesized by employing the organic ligands with the target heteroatoms. Raman, electron paramagnetic resonance (EPR), electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS) characterizations showed that the co-doping of N and O heteroatoms in the carbon support endows Co-SFB with enriched lone pair electrons, fast electron transfer ability, and strong metal-support interaction. These electronic properties resulted in strong FF adsorption as well as lower apparent reaction activation energy. At last, the obtained N, O co-doped Co/C catalyst showed excellent catalytic activity (nearly 100 mol% FF conversion and 94.6 mol% MF yield) and stability for in-situ dehydrogenation of FF into MF. This N, O co-doping strategy for the synthesis of highly efficient catalytic materials with controllable electronic state will provide an excellent opportunity to better understand the structure–function relationship.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mengyi Zhang,Xiaohui Sun,Xudong Cai,Xiaolu Zhan,Yufei Wu,Xuyang Zhang,Guohua Wu,Xiangwei Wang
In the field of electromagnetic wave (EMW) absorption, carbon matrix materials based on metal–organic frameworks (MOFs) have drawn more interest as a result of their outstanding advantages, such as porous structure, lightweight, controlled morphology, etc. However, how to broaden the effective absorption bandwidth [EAB; reflection loss (RL) ≤ −10 dB] is still a challenge. In this paper, large microsphere structures of a Co/C composite composed of small particle clusters were successfully prepared by the solvothermal method and annealing treatment. At a filling ratio of 40 wt %, the Co/C composite shows attractive microwave absorption (MA) performance after being annealed at 600 °C in an atmosphere of argon. With an EAB of 6.32 GHz (9.92–16.24 GHz) and a thickness of just 2.57 mm, the minimum RL can be attained at −54.55 dB. Most importantly, the EAB can attain 7.12 GHz (10.88–18.0 GHz) when the thickness is 2.38 mm, which is larger than that of the majority of MOF-derived composites. The superior MA performance is strongly related to excellent impedance matching and a higher attenuation constant. This study provides a simple strategy for synthesizing a MOF-derived Co/C composite with a wide EAB.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
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IF 6.6
Yuqi Yang,Longlong Zeng,Xiaoyan Li,Zaisheng Cai
Glasses such as automobile windshields, mirrors, and lampshades are prone to fogging due to temperature changes, which affects the process of use and even jeopardizes safety. Hydrophilic films can prevent the glass surface from fogging by absorbing condensation droplets. However, the anti-fog film only lasts for a short period because it will gradually dissolve with the moisture increasing, which leads to image distortion. Herein, we propose a hydrophilic/hydrophobic coating to achieve longer anti-fog persistence. The strong interface bonding of the polymer is the key to improving the durability performance of the coating. It prevents interfacial failure and folding caused by fogging conditions. In this paper, a multifunctional coating with good anti-fog and anti-frost properties was prepared using butyl acrylate (BA), acrylic acid (AA) and 4-benzoylphenyl acrylate (BPA) as the polymer monomers . The light transmission of coated glass is up to 90 % even under harsh fogging conditions. The poly(AA- co -BA-co-BPA) can be firmly bonded with the plasma-treated glass plate, which greatly enhances the durability and water resistance of the coating. After being immersed in deionized water for 60 h at room temperature, the coated glass still has a certain anti-fog effect and the light transmittance is maintained at about 85 %. In addition, the anti-fog coating has excellent self-healing properties due to the fact that the carboxyl group in AA can generate hydrogen bonding , so that it can be healed within 15 s with the help of hot water after physical damage. This anti-fog coating has great potential for application in construction, shipbuilding and other industries.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Juan Ma,Weiwei Chen,Junjie Qian,Anze Shui,Bin Du,Chao He
High-performance asymmetric ceramic membranes have shown great potential in wastewater treatment. Nevertheless, high production cost, which results from expensive raw materials, high energy consumption, and complicated preparation process, hinders their large-scale production and application. Herein, a simple and cost-effective co-pressing and co-sintering method was proposed to prepare thin defect-free asymmetric ceramic membranes. This method overcomes the bottleneck of preparing thin asymmetric ceramic membrane by co-pressing. The membrane with a cornstarch content of 20 wt% and sintered at 1300 °C possessed large water permeance (3640 L·m −2 ·h −1 ·bar −1 ), high permeability (steady-state feed permeance > 1000 L·m −2 ·h −1 ·bar −1 ) and selectivity (rejection rate > 99.6%), as well as excellent oil fouling resistance and regeneration performance. The fouling mechanism of the membrane was in accord with cake filtration for the whole separation process (3 h), although multiple fouling mechanisms might occur simultaneously in the initial filtration stage. This study indicates that co-pressing and co-sintering is a quite promising method for fabricating high-performance and cost-effective ceramic membrane.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 4
·10969-10981
·
IF 5.19
Yu Hongxia,Ding Dan,Zhao Shuailing,Faheem Muhammad,Mao Weijie,Yang Li,Chen Liwei,Cai Tianming
We report on the preparation of Co/N-NPC x/y with porous structure and excellent activation properties. The synthesis involves the preparation of Zn/Co-ZIF x and the carbonization of Zn/Co-ZIF x at a high temperature in an inert atmosphere. The volatilization of zinc during carbonization results in a porous structure, which is beneficial to the migration of pollutants. The sizes, specific surface areas, and pore size distribution of Co/N-NPC x/y can be achieved by tuning Zn/Co ratio. The calcination temperatures mainly affect the crystalline phase, crystallinity, and magnetic properties of the as-prepared materials. The effects of the as-prepared materials properties and activation conditions on the Rhodamine B (RhB) degradation by PMS activation were investigated. Overall, it exhibited superior catalytic activity in PMS activation, as evidenced by almost complete removal of RhB (0.020 mM, 100 mL) by using 5 mg/L Co/N-NPC 0.5/900 and 1.250 mM PMS within 30 min. Furthermore, it confirmed the participation of SO 4 •− , •OH, and 1 O 2 in the catalytic reaction, and both SO 4 •− and 1 O 2 were the main reactive oxygen species that play a major role.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
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IF 24.319
Shenghao Zhao,Tianqi Wang,Zhijiao Ji,Yajun Song,Yi Li,Jia Liu,Wenping Hu
Methanol electro-oxidation reaction (MOR) is the kernel of methanol fuel cell. When the multi-step microscopic transformations process of MOR couples and occurs on the same active site, undoubtedly it reduces the probability of reaction and increases the steric hindrance, resulting in slow reaction kinetics and degradation of catalytic performance. In order to decouple the dehydrogenation and CO oxidation in MOR, herein we synthesized the hierarchical catalyst (NiCo/N-TiO 2 @NaOH) with bifunctional spatial distribution, which displayed 73 mA cm −2 at the potential of 1.5 V (vs. RHE) and only 20 % degradation of performance after continuously electrolysis over 40,000 s. Based on analysis of mass transfer and electron transport in hierarchical structure, combining with in-situ mass spectrometry and theory calculation, the high MOR performance of NiCo/N-TiO 2 can be ascribed to the spatial decoupling the MOR reactions including dehydrogenation under synergic effect of Ni/Co and CO oxidation on N-TiO 2 film.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Qifeng Lin,Zeyu Yuan,Dongyi Wang,Wei Wei,Xibin Wang,Wei Han,Lili Wang
The growing problem of limited lithium resource reserves has resulted in increased attention and a corresponding surge in sodium-ion battery (SIB) research. However, SIBs have disadvantages, such as a short cycle life and low energy density. The lack of high capacity and long-cycle stability anode materials are important factors hindering the development of SIBs. In this study, hollow carbon nanospheres were nitrogen-doped, and the zeolitic imidazolate framework-67 was used as a precursor to synthesize cobalt-based layered double hydroxide using the hydrothermal method followed by synthesizing an NHCNS@CoSe 2 @C complex using calcination and carbon coating. In this design concept, the hollow-cavity structure of the carbon nanospheres provided shorter electron diffusion paths and increased stability; the introduction of nitrogen increased the number of defect sites and charge density of the porous carbon materials, which, with the transition metal selenide, enhanced the conductivity of the final product. The resulting carbon-supported anode material, NHCNS@CoSe 2 @C, had an initial stable discharge capacity of 465.6 mAh g − 1 at a current density of 0.1 A g − 1 and maintained a high capacity of 373.8 mAh g − 1 after 100 cycles. Moreover, it exhibited a high rate performance of 285.6 mAh g − 1 at a current density of 5 A g − 1 .
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CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Yuehua Deng,Wenhao Deng,Wenquan Huang,Zhiyong Zheng,Rui Zhang,Shiyuan Liu,Yanbin Jiang
Amorphization technology has been a promising strategy to improve the solubility and dissolution of drugs. This study aims to prepare norfloxacin (NFX) co-amorphous (CA) systems and evaluate the association between molecular descriptors and the formation and physical stability of NFX CAs. The molecular miscibility between NFX and 17 co-former candidates was firstly predicted using Hansen solubility parameters (HSPs) and six NFX CAs were successfully prepared by dry ball mill. Compared with crystalline NFX, four NFX CAs showed enhanced solubility (up to 2.50-fold) and dissolution rates. NFX CAs exhibited excellent physical stability under dry conditions. According to the quantitative calculations of Pearson correlation coefficient and Ridge regression, molecular descriptors have a great effect on NFX CA formation with structural parameters (Weight, VDW_vol, VDW_area, Rings) stronger than miscibility parameter Δ δ ¯ and p K a. These molecular descriptors corresponding to π···π interactions, molecular miscibility and ionic interactions are also responsible for physical stability. The results demonstrate that NFX CA can be stably formed if the co-former has more rings, smaller Δ δ ¯ (less than or close to 5 MPa 0.5 ) and larger Δp K a. This study offers a potential strategy to screen and design a CA system using multivariate data analysis based on theoretical considerations of molecular descriptors.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lixia Wang,Jia Huang,Zhiyang Huang,Huatong Li,Tayirjan Taylor Isimjan,Xiulin Yang
Metallic defects can improve catalysts' intrinsic activity by regulating its electronic structure and enhancing conductivity. However, the impact of these defects on the kinetics of the oxygen evolution reaction (OER) has not been extensively studied. Here, a V/P codoped nanoflower-like CoS 2 catalyst with rich Co defects on carbon cloth (V,P-CoS 2 /CC) is fabricated by feasible directional construction. The V,P-CoS 2 /CC validates extraordinary OER performance with overpotentials of 227/300 mV at 10/100 mA cm −2 and robust long-term stability. The enhanced single-electron spin resonance signal and higher lifetime strength indicate an increased number of surface Co defects induced by V/P codoping. Density functional theory (DFT) calculations verify that Co defects induced by V/P codoping of the surface reconstituted V-CoOOH/CoS 2 catalyst can optimize the adsorption/desorption energy of oxygen-containing intermediates to accelerate OER process. Besides, the nanoflower-like morphology with large electrochemical active surface area and good hydrophilicity facilitates electrolyte diffusion/gas emission, thereby synergistically elevating OER performance.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yanwei Zhu,Lang Gan,Jianqiao Shi,Gen Huang,Hongmei Gao,Li Tao,Shuangyin Wang
The structural design and atomic adjustment of the catalyst are the main factors that regulate the intrinsic electrocatalytic activity. Herein, we report a novel and facile strategy of synthesizing three-dimensional porous carbon network by polymer-assisted molding strategy. The porous carbon framework with Co-CoF 2 and carbon nanotubes (PCF@CCFCNT) was directly obtained by the calcination, in which Co-CoF 2 heterojunctions uniformly dispersed in the interconnected holes. Benefiting from the special hierarchical porous morphology, the dual-function catalytic activity of Co-CoF 2 heterojunctions and existence of Co-N x species, the as-obtained PCF@CCFCNT composites exhibit excellent performance in the oxygen evolution reaction (η = 300 mV@10 mA cm −2 ), as well as outstanding oxygen reduction reaction performance in alkaline medium (E 1/2 = 0.852 V, vs RHE). Moreover, as an air electrode in Zn-air batteries (ZABs), PCF@CCFCNT demonstrates a large peak power density of 184 mW cm −2 and superior long-term stability, which is much more stable than the one consisting of commercial Pt/C. This finding not only shows a simple composite design to achieve high-performance ZABs but also may stimulate the rapid development of 3D hierarchical porous electrocatalysts for advanced energy technologies.
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