INORGANICA CHIMICA ACTA
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2024
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IF 2.7
Xinfeng zhu,Tuo Wang,Jiawei Sun,Jiaxuan Li,Jingyu Wang,Junning Wang,Rongfu Peng,Zhengjie Li,Jingquan Liu,Libin Jiang,Kai Wang,Dandan Pang,Xueping Liu,Chaohai Wang,Jinhui Zhang
A series of ZIF-67-derived materials have been prepared by stirring and roasting ZIF-67 at different temperatures and used to activate persulfate for oxidation of tetracycline. Compared with Co 3 O 4 and common MOFs (MiL-100-Fe, UiO-66, and ZIF-67), ZIF-67-derived materials exhibit excellent catalytic activity. A 95.06 % removal has been achieved for 20 mg/L tetracycline at a catalyst dosage of 0.6 g/L, PMS dosage of 0.2 g/L. The N 2 adsorption/desorption experiment and the SEM analysis show that the large specific surface area favors the full contact between the active sites and the pollutants, and the regular pore structure is conducive to the diffusion and mass transfer of the pollutants. Moreover, XRD, Raman, and XPS studies demonstrate that a suitable calcination temperature can promote the formation of oxygen vacancies and active Co 2+ , essential for the formation of active oxygen species. The free radical scavenging experiment reveals that ·O 2 – is the main active species, followed by 1 O 2 . The effects of catalyst dosage, PMS dosage, initial pH, and coexisting ions on tetracycline oxidation are also investigated. Thus, this study provides the theoretical basis and practical evidence for activating PMS as a high-performance catalytic material for the degradation of antibiotics in water.
研究领域:
环境科学
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催化材料
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产品关联
DOI
高影响因子
Materials Today Nano
·
2025
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IF 8.2
Haotian Jiang,Yanxiang Wang,Chengjuan Wang,Shichao Dai,Bohan Ding,Jinghe Guo,Yue Sun,Dongming Liu,Hui Li
Exploring the synergistic effects of components and structures has emerged as a pivotal strategy for advancing high-performance electromagnetic wave (EMW) absorbing materials. In this work, we present an approach that integrates magnetic-dielectric components and porous structures by incorporating unidirectionally frozen-drying aramid nanofiber aerogels with ZIF-67 and subsequently preparing Co/Co 3 O 4 @carbon nanotubes/carbon nanofibers aerogels through heat treatment and catalyst chemical vapor deposition. By combining different functional components, a multiple heterostructure with excellent absorption capacity, wide effective absorption bandwidth (EAB), and thin thickness can be achieved. The inclusion of the magnetic-dielectric component significantly enhances the impedance matching, generating multiple loss mechanisms. Additionally, the three-dimensional porous structure of the aerogel facilitates multiple reflections and scattering of the incident EMWs, thereby enhancing the microwave absorption. Specifically, the obtained samples exhibit outstanding EMW performance, with a minimum reflection loss of −73.50 dB at a thickness of merely 2.08 mm and an EAB of 5.90 GHz. Furthermore, simulations evaluating radar cross-section values, electric field strengths, and energy loss density are conducted to assess the stealth capabilities under radar detection. This study culminates in the preparation of an aerogel characterized by excellent wave-absorbing properties and effective thermal insulation, offering vast potential for practical applications.
研究领域:
材料科学
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电磁学
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化学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Hong Yao,Gang Jin,Guozhe Sui,Jinlong Li,Dongxuan Guo,Shuang Liang,Ze Luo,Rongping Xu,Chao Wang,Jing Tang
Z-scheme photocatalytic heterojunction is considered as an effective strategy to promote the photogenerated electron-hole separation for improving the efficiency of photocatalytic hydrogen precipitation from splitting water significantly. Herein, a novel Z-scheme 2D-ZnIn 2 S 4 /NiCoP heterojunction is successfully prepared by coupling NiCoP derived from ZIF-67 through phosphating treatment with 2D-ZnIn 2 S 4 lamellae via a facile hydrothermal method . The Z-scheme heterostructure of ZnIn 2 S 4 /NiCoP could suppress the recombination-rate of photogenerated electron-hole pairs and enhance the visible-light-driven photocatalytic hydrogen production . As a result, the hydrogen production rate of 2D-ZnIn 2 S 4 /NiCoP (10 wt% ZnIn 2 S 4 ) increase to 5098.12 μmol g −1 h −1 significantly with an apparent quantum yield (AQY) of 5.24% at 420 nm, which is 3.07 times than that of bare ZnIn 2 S 4 . The enhancement of photocatalytic performance is attributed to the following issues: 2D-ZnIn 2 S 4 could avoid the agglomeration of tiny ZnIn 2 S 4 , exposing more active sites and shortening the transmission distance of photogenerated carries; the formation of Z-scheme heterostructure could promote the separation of photogenerated electron-hole pairs; the unique hollow structure of NiCoP derived from ZIF-67 could inhibit the recombination of the photogenerated electron-hole. Overall, this work could provide a new idea for designing and preparing of visible-light-driven photocatalysts with high efficiency for photocatalytic hydrogen production.
研究领域:
材料科学
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能源化学
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光催化
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
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IF 5.2
Ke Wu,Chunlei Wu,Wenou Bai,Ning Li,Yangqin Gao,Lei Ge
Hydrogen energy is vital important for solving pollution of environment and energy shortage. Hydrogen production via solar energy and semiconductor photo-splitting water is one of the most environmentally friendly strategies at present. In this work, Co-N-C, a non-noble metal-based ZIF-67 derivative, was employed as a co-catalyst to achieve an in situ growth of spherical CdS via simple one-step hydrothermal. Due to the large specific surface area of Co-N-C, the agglomeration of CdS is avoided and the photocorrosion phenomenon is weakened. Under irradiation of visible light , the hydrogen generation activity of Co-N-C/CdS was achieved 905 μmol g −1 h −1 . It is 6 times that of pure CdS with excellent stability. At the contact interface of the Co-N-C and CdS, the transfer and the separation of photoinduced carriers had been enhanced by a great many of channels. DFT calculation further showed that Co nanoclusters , as the active sites of hydrogen production, significantly enhanced photocatalytic hydrogen evolution activity. Therefore, Co-N-C not only acts as electron acceptor , but also serves as support of highly dispersed CdS to promote the stability of system during photocatalytic hydrogen generation. This work demonstrates the advantages of CdS binding MOF derivatives to construct composite photocatalysts with enhanced dispersibility and hydrogen production activity.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
IONICS
·
2021
·Vol. 28
·期 2
·635-645
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IF 2.817
Zhao Wei,Feng Wangjun,Chen Jingzhou,Huang Zhaoyu
Lithium-sulfur batteries (LSBs) are considered the most likely replacement for conventional lithium–ion batteries in next-generation high-energy output solutions based on their high specific capacity (1675 mAh g −1 ) and high-energy density (2600 Wh kg −1 ). But, there are some problems that need to be solved urgently. In this work, an environmentally friendly, green, and low-cost ZIF-67-derived cobalt-based sulfate material (CoSO 4 ) combined with carbon nanotubes was proposed as a sulfur host material. Experiments show that the addition of CoSO 4 can significantly enhance the transformation of polysulfide and suppress the shuttle effect. The best performance is the CNT-CoSO 4 -2/S, which has an initial capacity of 1356.9 mAh g −1 at 0.1 C current density. Furthermore, long-term cycle test was carried out at a current density of 0.2 C; the coulombic efficiency was above 98.63% after 200 cycles. This work demonstrates the potential of cobalt-based sulfates as cathode materials for lithium–sulfur batteries.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
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IF 4.229
Meijia Liu,Xuezhang Xiao,Shuchun Zhao,Sina Saremi-Yarahmadi,Man Chen,Jiaguang Zheng,Shouquan Li,Lixin Chen
Transition-metal nanoparticles (NPs) can catalytically improve the hydrogen desorption/absorption kinetics of MgH 2 , yet this catalysis could be enhanced further by supporting NPs on carbon-based matrix materials . In this work, Co NPs with a uniform size of 10 nm loaded on carbon nanotubes (Co@CNTs) were synthesized in situ by carbonizing zeolitic imidazolate framework-67 (ZIF-67). The novel Co@CNTs nanocatalyst was subsequently doped into MgH 2 to remarkably improve its hydrogen storage properties. The MgH 2 -Co@CNTs starts to obviously release hydrogen at 267.8 °C, displaying complete release of hydrogen at the capacity of 6.89 wt% at 300 °C within 15 min. For absorption, the MgH 2 -Co@CNTs uptakes 6.15 wt% H 2 at 250 °C within 2 min. Moreover, both improved hydrogen capacity and enhanced reaction kinetics of MgH 2 -Co@CNTs can be well preserved during the 10 cycles, which confirms the excellent cycling hydrogen storage performances. Based on XRD , TEM and EDS results, the catalytic mechanism of MgH 2 -Co@CNTs can be ascribed to the synergetic effects of reversible phase transformation of Mg 2 Co to Mg 2 CoH 5 , and physical transformation of CNTs to carbon pieces. It is demonstrated that phase transformation of Mg 2 Co/Mg 2 CoH 5 can act as “hydrogen gateway” to catalytically accelerate the de/rehydrogenation kinetics of MgH 2 . Meanwhile, the carbon pieces coated on the surfaces of MgH 2 particles not only offer diffusion channels for hydrogen atoms but also prevent aggregation of MgH 2 NPs, resulting in the fast reaction rate and excellent cycling hydrogen storage properties of MgH 2 -Co@CNTs system.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Xingnian Duan,Jianmei Cen,Xiaoyu Qiu,Xixiang Liu
The development of high-performance and cost-effective electrocatalysts for oxygen evolution reactions (OER) is key to renewable energy conversion and storage technologies. In this paper, a hierarchical Co(OH) 2 -MoO 3 nanosheets with petal-like architecture was prepared by a simple one-step hydrothermal method using ZIF-67/NF as a precursor, and it was used as a direct electrocatalyst for OER. Notably, this petal-like Co(OH) 2 -MoO 3 /NF layered nanosheets not only prevent the agglomeration of nanostructured material , but also facilitate the complete penetration and diffusion of electrolyte. In addition, due to the strong electronic interaction between Co(OH) 2 and MoO 3 in the Co(OH) 2 -MoO 3 /NF system, Co(OH) 2 -MoO 3 /NF exhibits excellent electrocatalytic OER performance. It has a low overpotential of 273 mV at 10 mA cm −2 and excellent stability. This study provides a simple and effective strategy for the rational design and structural evolution of MOF-derived materials to achieve inexpensive and effective electrocatalysis.
研究领域:
材料科学
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能源化学
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电催化
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
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IF 5.4
Yuhan Wang,Kaifeng Wang,Qitan Zheng,Haochang Chen,Hua Li,Lei Yang,Yujie Chen,Hezhou Liu
Cobalt/nitrogen-doped carbonaceous particles were synthesized by the calcination of zeolitic imidazolate frameworks (Co-ZIF-67) at different heating rates. Their morphology, composition, and electromagnetic properties were measured. It was found that the structure and morphology of the derivatives were easily controlled by adjusting the heating rate. At a low heating rate, the derivatives retained their original shape, and smaller Co nanoparticles were formed. Consequently, more carbon nanotubes were formed, and the degree of graphitization improved, building a 3D conductive network. At a much higher heating rate, most of the carbon skeleton was destroyed; however, the smaller fragments endowed the samples with more conductive pathways because of the percolation and tunnel effects, increasing the dielectric loss. At a filler loading of 30%, the nanocomposites prepared at a heating rate of 1 °C/min exhibited the optimal reflection loss, −70.76 dB, at a thickness of 3.46 mm and an effective absorption bandwidth of 12.4 GHz.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Qinghua Wang,Feng Gao,Biyan Xu,Fuxian Cai,Fengping Zhan,Fei Gao,Qingxiang Wang
In this paper, unique amorphous bimetallic sulfides of CoNi 2 S 4 with nanocage structure were synthesized. The ZIF-67 with typical rhombic dodecahedron structure was first synthesized, and then the bimetallic product was achieved by the ingenious combination of Ni 2+ -induced template scarification of the synthesized ZIF-67 and the sulfuration reaction. The characterization assays showed that the CoNi 2 S 4 nanocages perfectly inherited the rhombic dodecahedral morphology of the ZIF-67, but with many vertical aligned nanosheets on the shell. The CoNi 2 S 4 nanocages were utilized as an electrode material for capacitance test. The results revealed that the synthesized CoNi 2 S 4 nanocages have low charge-transfer resistance, and high specific capacitance of 1890 F g −1 at a current density of 4 A g −1 . The specific capacitance remains 89.9% and 71.6%, respectively after 1000 and 5000 cycling charge-discharge measurements. This excellent performance can be ascribed to the amorphous nature, unique hollow nanocage structure and bimetallic composition of the product. Furthermore, an asymmetric supercapacitor was assembled using CoNi 2 S 4 nanocages as positive electrode materials and Yolk-Shell carbon spheres (YS-CS) as negative electrode materials, and the resulting CoNi 2 S 4 //YS-CS device exhibits a high energy density of 35 Wh kg −1 at a power density of 640 W kg −1 .
研究领域:
材料科学
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能源存储与转换
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产品关联
DOI
高影响因子
Journal of Central South University
·
2021
·Vol. 28
·期 5
·1279-1290
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IF 1.716
Zhang Guang-ji,Tang Fei-ying,Wang Li-qiang,Yang Wen-jie,Liu You-nian
Transition metal sulfides (TMSs)-based materials have been extensively investigated as effective non-noble catalysts for various applications. However, the exploration of TMSs-based catalysts for hydrogenation of nitro compounds is limited. Herein, CoS x /NC catalysts were prepared by solvothermal sulfurization of ZIF-67, followed by high-temperature annealing (300–600 °C) under NH 3 atmosphere. It was found that the structures and compositions of the as-prepared CoS x /NC can be readily tuned by varying the annealing temperature. Particularly, CoS x /NC-500, which possesses higher degree of S defects and larger specific surface areas, can achieve high conversion, selectivity and stability for catalytic reduction of nitro compounds into amines under mild reaction conditions.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Haixia Zhang,Wenyuan Dai,Ru Liu,Junying Xiang,Yanhui Song,Ying Hou,Hong Wei,Peizhi Liu,Bingshe Xu,Jianguo Liang,Junjie Guo
ZIF-67-derived Co–N–C catalysts exhibit efficient water-splitting performance and thus have attracted intense research interest. However, the serious Co agglomeration and loss of most N atoms due to high-temperature pyrolysis limit the further improvement of their electrocatalytic performance. Herein, we report a ZIF-67-derived 2D porous N-doped carbon nanosheet decorated with a Co nanoflake catalyst (Co@NC/CC-500) for OER and HER by a facile pyrolysis method at a low temperature of 500 °C. Benefiting from the ultrahigh N doping (12 atom %) and uniformly dispersed Co nanoflakes on 2D porous carbon nanosheets, which lead to a high content of Co–N active sites, the Co@NC/CC-500 catalyst exhibits outstanding performance toward the HER and OER with overpotentials of 95 and 183 mV at 10 mA cm–2 in 1 M KOH, respectively. Furthermore, the alkaline water electrolyzer using Co@NC/CC-500 as the cathode and anode catalysts can achieve a current density of 10 mA cm–2 at a cell voltage of 1.52 V. This special low-temperature production method may be extensively utilized to create precisely defined monometal or bimetal nanoflakes decorated on 2D porous N-doped carbon nanosheets for diverse electrochemical energy applications.
研究领域:
材料科学
·
电化学能源
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产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Shunzhe Zhang,Kaifeng Wang,Haochang Chen,Hezhou Liu,Lei Yang,Yujie Chen,Hua Li
Transition metal sulfides (TMSs) have become promising candidates as electrode materials in energy storage fields thanks to the high theoretical capacity. However, their application is hindered by depressed electrical conductivity and poor cycling performance. Herein, we proposed a ZIF-67 derived, nitrogen-doped, graphene-coated and carbon nanotubes-interlinked 3D Co 3 S 4 /C conductive network (N–Co 3 S 4 -GN/CNT) for high-performance supercapacitors . Through controlling the mass ratio of ZIF-67, melamine and g-C 3 N 4 , various microstructures with determined electrochemical performance could be achieved. The nanocomposites synthesized with the ingredient mass ratio of 2: 1: 1 (NCSC-211) were proven to have the most excellent comprehensive electrochemical properties . In the NCSC-211 nanostructure , multi-layer graphene function as conductive shells for improved cycling performance by alleviating pulverization caused by volume change, thick CNTs act as conductive bridges and agglomeration spacers that increase electron conductivity and provide more active sites for redox reaction and doped-nitrogen offer enhanced wettability to electrolyte and faster electron transfer . The NCSC-211 electrode displayed specific capacitance of 1158 F g −1 at 1 A g −1 , rate capability of 86% at 10 A g −1 and extraordinary cycling stability with 97.2% capacitive retention after 4000 cycles. Furthermore, the assembled asymmetric supercapacitor NCSC-211//activated carbon exhibited energy density of 43.73/37.69 Wh kg −1 at power density of 800/8000 W kg −1 and capacity retention of 95.3% after 5000 cycles at 5 A g −1 . The designing strategy of in-situ grown instead of additional added conductive phase that fully-covered and strongly-interlinked network nanostructure may pave the road towards TMSs in synthesizing energy storage materials by compensating their intrinsic drawbacks.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）