Journal of Energy Storage
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2022
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IF 8.907
Chunfeng Xue,Wei Zhao,Qian Zhang,Jinxin Wang,Yueyue Wei,Kai Lv,Teng Wu,Yu Lin,Xiaohong Li,Xiaogang Hao
Zeolitic imidazolate framework (ZIF) derived carbon generally suffers from a hydrophobic close-ended microstructure, leading to poor rate capability and low energy density in supercapacitors . In view of the defects, a facile strategy is demonstrated to synthesize open-door nanoporous carbon with self-doped heteroatoms by the pyrolysis of salt-filled ZIF-8. Specifically, inert NaCl is impregnated into the channels of ZIF-8 to inhibit framework shrinkage and promote the generation of open pore system . The resultant carbon CZ-900 features with O, N co-doped surface and specific surface area of 1420 m 2 ·g −1 . It exhibits a specific capacitance of 574.9 F·g −1 at 0.5 A·g −1 in aqueous electrolyte of 1.0 M H 2 SO 4 , which is higher than other carbons derived from ZIF-8. In the two-electrode system, it shows a high energy density up to 21.1 Wh·kg −1 at a power density of 211.3 W·kg −1 . The superior performances can be attributed to its integration of open-pore structure and N/O co-doped surface, which provides a fast ion-transport pathway, improved interface wettability, broadened operation potential and efficient faradic-activity.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Chenghong Wu,Xiaopeng Chen,Jiawei Fu,Jiezhong Zou,Jiezhen Liang,Xiaojie Wei,Linlin Wang
The large-scale synthesis of transition metal catalysts with high performance and their catalytic mechanism for hydrogenation is of great importance for the development of a cost-effective alternative to noble metal catalysts. Herein, we report a facile and high-yield approach for the large-scale production of highly active Co/NCNTs catalyst transformed from zeolitic imidazolate frameworks (ZIFs). The precursor ZIF-67 could be easily prepared in an aqueous solution at room temperature in a short time (∼30 min) with a high space–time-yield. Followed by low-temperature (450 °C) pyrolysis, the Co/NCNTs catalyst was obtained in high yield. Benefiting from the high density and accessible active sites, Co/NCNTs-450 exhibits high activity in hydrogenation of aromatic hydrocarbon resin (AHCR) at 160 °C and 3 MPa (for the first time below 5 MPa), which was superior to the 5 wt% Pd/C. Furthermore, a combination of kinetic experiments and density functional theory (DFT) calculations were conducted to provide insight into the mechanism of AHCR hydrogenation. The 21 kinetic models based on the Eley-Rideal (ER) and Langmuir-Hinshelwood-Haugen-Watson (LHHW) formalism were proposed to describe the kinetic data obtained via elimination of the mass transfer limitations. On the basis of the model discrimination and regression results, the LHHW mechanism presented the best fit. And all the estimated kinetic parameters, including rate constants and activation energy, could be used in a reactor design for process scale-up. The DFT calculations further corroborated the kinetic modeling results that the surface reaction of chemisorbed AHCR and the dissociatively adsorbed hydrogen was the rate-determining step.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yaqi Zhang,Yaming Sun,Yong Man,Hang Yuan,Renyong Zhao,Guoqiang Xiang,Xiuming Jiang,Lijun He,Shusheng Zhang
The development of peroxymonosulfate (PMS) catalysts with sufficient active sites and high mass transfer capacity is a desirable but challenging aspect in advanced oxidation processes. In this work, an Fe/N-co-doped porous carbon (Fe/N-PC) material derived from silica-coated Fe-doped zeolitic imidazolate framework-8 (Fe-ZIF-8) was developed and used as catalyst for the degradation of aflatoxin B 1 (AFB 1 ). Fe-ZIF-8 introduced additional Fe-N sites with high catalytic PMS activity. Importantly, the strategy of silica coating on the surface of Fe-ZIF-8 effectively prevented the aggregation of catalyst particles during the pyrolysis process and introduced a hierarchical porous structure in Fe/N-PC, significantly improving the mass transfer of reactants on the catalyst. As a result, Fe/N-PC possessed a much higher adsorption capacity for AFB 1 (202.8 mg g −1 ) than other reported carbon adsorbents and exhibited fast degradation of AFB 1 with ultra-high removal efficiency (99.88%) within 30 min. Singlet oxygen ( 1 O 2 ) was proved to be the dominant reactive species for AFB 1 degradation. In addition, four degradation products were identified, and two possible degradation pathways were proposed. The double bond of the terminal furan ring or the methoxy group was destroyed, which implied that the toxicity of the degradation products was significantly reduced. Based on the above results, Fe/N-PC can be considered an efficient catalyst for the removal of hard-to-degrade AFB 1 in practical applications.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2022
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IF 5.141
Qianshu Xia,Yun Hao,Suimin Deng,Lina Yang,Ruoxin Wang,Xiangfeng Wang,Yuan Liu,Hailing Liu,Mengxia Xie
s Water pollution induced by the productive process of organic dyes would lead to various diseases, and so treatment of the wastewater is an urgent task for protecting human health and ecological environment. In this work, visible light responsive heterojunction material based on silver iodide and carbon dots (CDs) doped ZIF-8 metal organic frameworks ( [email protected] @AgI) has been prepared by a green solvent-free strategy and in-situ ion deposition method. The [email protected] @AgI composites have high photocatalytic performance for degradation of acridine orange (AO) dye under visible light, and the maximum degradation percentage can reach to 96.0%, which was estimated by the UV–visible spectroscopy. The porous structure and large surface area of the photocatalyst were favorable to absorption of the target dye on the catalyst, which can promote the kinetic degradation rate for low level concentration of the dye. The introduction of CDs into the AgI heterojunction can improve the electron transport efficiency and visible light absorption capacity, and thus significantly enhancing the photocatalytic activity of the catalyst. The photocatalytic mechanism was proposed as indirect Z-scheme heterojunction type based on the energy band structure of the catalyst. This work provides a visible light photocatalyst for removal of the AO dye in wastewater and offers a promising strategy for developing photocatalyst for treatment of organic pollutants in the environment using solar energy.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2022
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IF 5.895
Chuanyu Yang,Peitong Yu,Ying Li,Junyang Wang,Xinyue Ma,Ni Liu,Ting Lv,Hongru Zheng,Han Wu,Hongxia Li,Chunyan Sun
Lead contamination has posed a potential threat to the environment and food safety, arousing extensive concern. In this work, we fabricated a novel fluorescent sensing platform based on zeolitic imidazolate framework-8 (ZIF-8) and DNAzyme for monitoring Pb2+ in water and fish samples. ZIF-8 was proposed as a fluorescence quencher with the advantages of simple synthesis, low cost, and high quenching efficiency. The Pb2+-dependent GR5 DNAzyme containing the large ssDNA loop can be adsorbed onto ZIF-8 accompanied by fluorescence quenching. Upon binding with Pb2+, GR5 DNAzyme was activated and cleaved, leading to the release of FAM-labeled 5-base ssDNA, which restored the fluorescence. The “turn-on” assay can detect Pb2+ through the one-pot procedure in the range of 0.01–10.0 nM with a detection limit of 7.1 pM. The platform is promising for on-site monitoring of Pb2+ owing to the excellent performance of high sensitivity, low background, strong anti-interference ability, and simple operation.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Ling Li,Zhiqiang Wei,Weizhe Liu,Meijie Ding,Zhiming Li
Reasonable construction of multi-pore heterogeneous structures and enhancement of synergistic interaction between metal ions are important means to improve the performance of supercapacitors . This work selected metal organic frameworks (MOF) as the sacrificial template, and Se-doped needle-like nanosphere heterostructures Se-CoSe 2 @ZnSe were successfully prepared by in situ growth and selenization treatment. The specific capacity of the Se-CoSe 2 @ZnSe-5 (CZS-5) electrode is up to 2469.12 F g −1 at 1 A g −1 , and the capacity retention rate of 3000 cycles at a current density of 10 A g −1 is 85.39 %. The CZS-5//AC hybrid supercapacitor has a high power density of 1280.00 W kg −1 at an energy density of 68.88 Wh kg −1 . The excellent electrochemical properties are attributed to the construction of Se-CoSe 2 @ZnSe heterostructure of needle-shaped nanospheres enhances the synergy between Zn and Co ions; the doping of selenium effectively improves the conductivity of the electrode material; selenium vacancies produced during selenization increase the activity of the active site. In addition, the density functional theory (DFT) calculation shows that Se-CoSe 2 @ZnSe-5 has higher density of states (DOS) near the Fermi energy level, which provides additional theoretical support for the improvement of electrochemical performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Chunxia Yan,Shuai Jia,Jie Wei,Ziqiang Shao
Porous carbon aerogels derived from abundant biomass, which possess a unique structure, a high specific surface area and heteroatom doping, are a promising electrodes material for supercapacitors (SCs). In this study, an innovative hierarchical porous material comprising cobalt decorated porous carbons derived from cellulose nanofiber / graphene / Zn/Co ZIF carbon aerogels (CRZCs) has been successfully synthesized by directional freeze drying and carbonization methods. Cellulose nanofibers (CNFs) and graphene (rGO) layers play not only a supporting role, but also an internal storage site for electrolytes, contributing to the diffusion of electrolytes to the surface of active substances, at the same time enhance hydrophilicity of the aerogel and contribute to uniformly disperse Zn/Co ZIF. What's more important is that the carbon aerogels possess hierarchical porous involving micropores, mesopores and macropores, which further aid electrolyte penetration and ion storage. Furthermore, benefiting from the synergetic effect of hierarchical porous, high surface area, high conductivity, the prepared CRZC electrode obtains a high specific capacitance (364.6 F g −1 at 1 A g −1 ), an extraordinary capacitance retention rate (83.4 % at 10 A g −1 ). Simultaneously, the assembled supercapacitor by CRZC 900 exhibits a high specific capacitance (121.4 F g −1 at 0.5 A g −1 ), good charging/discharging rates, and remarkable cycling stability (78.9 % capacitance retention over 10000 cycles). The energy density up to 18.9 Wh kg −1 is achieved at power density of 288.4 W kg −1 , indicating its comprehensive applicability in energy storage. Finally, our results provide a general approach to construct hierarchical porous carbon aerogels for high-performance supercapacitors.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yangchao Liu,Senqing Fan,Yu Chen,Jiaojiao Chen,Jiaxin Meng,Mingxia Yang,Chuang Li,Haijie Qing,Zeyi Xiao
A catalytic membrane nano reactor (CMNR) with two-dimensional channels has been fabricated by graphene oxide (GO) nanosheets with ZIF-67 derived Co 3 S 4 catalyst immobilized on. The characterization by X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron Spectroscopy (XPS) indicates the successful fabrication of Co 3 S 4 @GO nanosheets. The uniformly dispersed Co 3 S 4 nanoparticles immobilized on GO nanosheets in the range of 3–5 nm and the thickness of the CMNR is in the range of 206–1091 nm can be determined by Transmission electron microscope (TEM) and Scanning electron microscope (SEM), respectively. The catalytic performance of this CMNR has been evaluated by 4-nitrothiophenol (4-NTP) reduction under the flow-through mode. The 4-NTP conversion of over 99% can be achieved under the condition of membrane flux of being 144.4 L·m −2 ·h −1 . The uniformly dispersed Co 3 S 4 with small size and the confined two-dimensional channels with nano scale for enhanced mass transfer can be contributed to the good catalytic performance of this CMNR. High 4-NTP conversion and nice stability can be achieved for a long time by this CMNR under the condition of humic acid mixed in the reactant solution, since the CMNR is resistant to the poisoning of catalysts by humic acid.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
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IF 5.999
Yu Zhou,Chengyu Zhang,Yuefei Wang,Jiaxing Zhang,Xiaohui Yan,Shengping You,Wei Qi,Rongxin Su,Zhimin He
Nanotechnology has been widely used in cancer treatment but only a small fraction (0.7 %) of the administered nanoparticle was delivered into a solid tumor, while the remaining fraction causes off-target toxicity in healthy tissues. The activation of prodrugs by exogenous enzymes can be used as an effective anticancer strategy to reduce systemic toxicity. In this study, the [email protected] imidazolate framework-8 ( [email protected] ) enzyme-activated prodrug system was created based on the high catalytic activity of LA in an acidic environment and the pH response (pH∼5.5) of ZIF-8. Quercetin (QU) was selected as the prodrug, which is non-toxic and even beneficial without being activated by LA. LA could be precisely released in the acidic tumor microenvironment for activating nontoxic QU successfully to produce toxic oxidized quercetin (OQU), and the LA was steady loaded on the [email protected] under physiological conditions (pH∼7.4). Especially, the high concentrations of glutathione (GSH) in tumors could accelerate the oxidation of QU by LA. Meanwhile, GSH could be consumed continuously by the reduction of OQU for regenerating QU, thus a LA-QU-GSH redox was formed ingeniously. Therefore, the synergistic effect of OQU toxicity and GSH depletion induced reactive oxygen species (ROS) accumulation and tumor cell apoptosis. Overall, the [email protected] prodrug system provides ideas for safe and effective cancer treatment with low off-target toxicity.
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PubMed
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Luyan Shi,Ke Zhu,Yuting Yang,Yi Liu,Shoulei Xu,Tayirjan Taylor Isimjan,Xiulin Yang
Designing a cost-effective and high-performance catalyst for NaBH 4 hydrolysis is a significant step in developing a sustainable hydrogen source . Herein, we prepared a cost-effective Ru-clusters decorated cobalt-cerium oxides coating ZIF-67 (Ru/Co 6 Ce 1 @ZIF-67) catalyst via a facile reduction method, displaying high performance and exceptional reusability in alkaline NaBH 4 solution. The optimized catalyst exhibits a high hydrogen generation rate (HGR, 5726.1 mL min −1 g −1 ), turnover frequency (TOF, 413.9 mol H2 min −1 mol R u − 1 ), and low activation energy (E a , 53.0 kJ mol −1 ), surpassing most of the recently reported catalysts. Furthermore, the catalytic performance does not change considerably after five cycles, indicating the catalyst's multi-cycle reusability. Studies imply the uniquely synergistic effect of Ru, Co/Ce oxides, abundant oxygen vacancies , as well as the porous nanocube structure, enabling the catalysts to possess high metal dispersion, outstanding catalytic performance and exceptional reusability. This work will open light on using an oxygen vacancies-rich strategy to design a high-activity catalyst for promoting NaBH 4 hydrolysis.
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CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Jie Yang,Ao Zhang,Yuxin Chen,Linsheng Wang,Meixian Li,Hongyu Yang,Yanbei Hou
Biomass materials are considered to be excellent candidates to replace petroleum-based materials, but inherent flammability limits their applications. In this work, biomass aerogel (BA) was prepared by freeze-drying method from sodium alginate (SA) and polyvinyl alcohol (PVA). To improve fire safety of BAs, a core–shell structured ZIF-67@Cobalt coordination compound was successfully synthesized, which was surface functionalized by 3,5-diamino-1,2,4-triazole and 9,10-dihydro-9-oxo-10-phospho-diphenyl-10-oxide (DOPO), named as DOPO-NH 2 -ZIF-67. The addition of DOPO-NH 2- ZIF-67 (2 wt%) outstandingly improved fire safety of BA, in contrast to neat BA, peak heat release rate, peak smoke production rate, and total smoke production were reduced by 66.6%, 85.10%, and 72.76%, respectively. Furthermore, the incorporation of ZIF-67 and its derivatives has no adverse effect on the thermal insulation performance of BA composites and significantly improved their compressive strength from 0.27 MPa to 1.76 MPa. Preparation of core–shell structured ZIFs rich in active groups furnishes a conceivable way to synthesize an effective flame retardant, and a prospective method for the fabrication of aerogel insulation materials with green and economical additive-free technology is proposed.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Jingjing Zhu,Huaqiang Chen,Lan Wang,Engang Fu,Jianping Wu,Qilei Zhang,Lirong Yang,Gang Xu
A composite hollow mesoporous MIL-101@Pd@ZIF-8-30min (HM-MIL@Pd@ZIF-30min) nanocatalyst with hollow core and stable shell was developed in this study. Hollow mesoporous MIL-101(HM-MIL) was hydrothermally synthesized and employed as the supports of Pd nanoparticles by adopting a facile HM-MIL-template strategy to make ZIF-8 crystals uniformly overgrew on HM-MIL-101@Pd microcrystal cores. The obtained core-shell catalyst possessed hollow mesoporous structure, and the shell layer of ZIF-8 had additional advantages of abundant Lewis basic sites for heterogeneous racemization reaction. Compared with unmodified HM-MIL@Pd and solid MIL-101(Cr)@Pd@ZIF-8 (S-MIL@Pd@ZIF-8), HM-MIL@Pd@ZIF-8-30min had higher racemic chemical activity (conv. 99%) and selectivity (sel. R-amide 94%) in one-pot dynamic kinetic resolution (DKR) reaction system of rac -1-phenethylamine. The catalyst showed excellent stability, and the conversion and selectivity reached 95% and 93% respectively after ten catalytic cycles.
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