Scientific Reports
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2025
·Vol. 15
·期 1
·1-11
·
IF 3.9
Jin Hong,Lin Dejian,Zhou Laihong,Zha Guojun,Wu Huanwen,Li Shuigen,Jiang Minhua,Huang Ping,Xie Haijiao
Electrocatalytic materials with dual functions of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have received increasing attention in the field of zinc-air batteries (ZABs) research. In this study, bifunctional CoNC@NCXS catalysts were prepared by anchoring Co and N co-doped CoNC on N-doped carbon xerogel sphere (NCXS) based on the spatially confined domain effect and in-situ doping technique. CoNC@NCXS exhibited excellent ORR/OER activity in alkaline electrolytes with the ORR onset potential of 0.99 V, the half-wave potential (E 1/2 ) of 0.78 V at 10 mA cm −2 and the OER overpotential of 360 mV at 10 mA cm −2 . These excellent catalytic activities were derived from constructing composite active structures and enhancing electrocatalytic efficiency. The ZAB assembled with CoNC@NCXS catalyst had a discharge specific capacity of 710 mAh g −1 at a current density of 10 mA cm −2 , which was superior to that of the Pt/C&RuO 2 catalyst-assembled battery (667 mAh g −1 ). After running for 150 h, the charge and discharge efficiency of the CoNC@NCXS battery decreased by only 12.8%, which confirmed the excellent stability of the CoNC@NCXS catalyst. The free energy diagrams showed that, CoNC@NCXS has lower energy barriers and higher potential than CoNC in key reaction steps. This study provides a new perspective for the structural design of highly active composite catalysts in energy storage and conversion.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Di Wu,Yilin Wang,Zhifang Liu,Caiyu Ge,Jiejun Li,Xinyi Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
Rifampicin (RFP) is an emerging environmental pollutant that exists in natural waters due to discharged from the medical and pharmaceutical industries, posing potential risks to aquatic life and human health. Developing highly sensitive detection techniques for RFP is essential for environmental monitoring and public health protection. In this work, Mn 2 O@Zn-NC was synthesized using in-situ growth and pyrolysis methods. Rod-like MnO 2 providing dispersed sites for the growth and crystallization of dodecahedral ZIF-8,with dodecahedral ZIF-8 tightly encapsulates MnO 2 . Additionally, the Zn-NC formed after high-temperature treatment effectively addresses the issue of poor conductivity in MnO 2 , which is conducive to the accurate display of RFP current signals. Using material of Mn 2 O@Zn-NC, a high-sensitivity electrochemical sensor was developed with a detection range of 0.040–100 µM and a limit of detection of 25 nM. This highly sensitive sensor can accurately detect RFP in environmental samples, with results comparable to those obtained using UV-Vis spectroscopy. This breakthrough electrochemical detector provides valuable opportunities for creating smart, efficient, and portable monitoring solutions.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Peng Song,Yue Zhang,Ningmiao Zhao,Linzhi Zhai,Shuping Ba,Xinyu Wang,Congcong Li,Zhenyuan Ji,Qi Liu
Herein, by using ZIF-8, a metal–organic frameworks (MOFs) material, as nitrogen and carbon sources, KOH as activator and LiCl/KCl as medium, a new variety of N-doped porous carbon nanosheets is developed via an affordable molten salt assisted pyrolysis route. Results verify that, with KOH activation, pore volume and specific surface area of the flake-like specimen are obviously enriched, which contribute to a hierarchically porous structure. Specifically, ZNPCN-0.2–750 with total pore volume of 1.0 cm 3 g −1 , specific surface area of 787.6 m 2 g −1 and high N-doping content of 21.2 at% exhibits a decent capacitive property as cathode for Zn-ion hybrid supercapacitors (ZHSs), such as energy density of 83.2 Wh kg −1 at 399.9 W kg −1 , specific capacitance of 233.9F/g at 0.5 A g −1 and cyclic stability with capacitance retention of 87.7 % after 20,000 cycles. These performance parameters exceed numerous ZHSs reported so far, guaranteeing a huge potential in practical application.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zuopeng Guan,Fangbo Zhao,Xinyu Guo
ABSTRACT Zinc deplating waste liquid is considered hazardous due to the presence of heavy metal Zn(II) and hydrochloric acid, along with Fe(II). This study aims to develop a new adsorbent for efficient separation of zinc (II) from deplating waste liquid in a real factory. The novel adsorbent, PSCL-CQDs-NH 2 , was prepared by grafting home-made amino-rich carbon quantum dots (CQDs-NH 2 ) onto a chloromethyl polystyrene resin matrix. It has been observed that amino groups can be protonated under strongly acidic conditions, enabling them to adsorb negatively charged Zn(II)-Cl complexes while repelling positively charged Fe(II)-Cl complexes. The grafted nano-size CQDs-NH 2 can offer more adsorption positions to improve the adsorption properties. The results shown that PSCL-CQDs-NH 2 presented higher Zn(II) adsorption capacity and better performance in separating Zn(II) from Fe(II) compared to the conventional anion exchange resin (717). At 298 K, PSCL-CQDs-NH 2 showed a maximum Zn(II) adsorption capacity of 201.77 mg/g, and a selective Zn(II)/Fe(II) separation factor of 3033.72, which were 54.7% and 45.4 times higher than those of 717 resin. In the fixed bed adsorption process, PSCL-CQDs-NH 2 exhibited 61.5% higher adsorption performance than 717 resin when treating actual zinc deplating waste liquid. Moreover, the water consumption during regeneration of PSCL-CQDs-NH 2 is reduced by 10.3% compared to the 717 resin. These findings indicate that PSCL-CQDs-NH 2 is an effective material for the treatment of industrial zinc deplating waste liquid.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Qihui Ding,Qi Zhang,Binbin Li,Ding Cai,Wei Wu
For rechargeable Zn air batteries (ZABs), the low cost and scalable preparation method for the catalyst with favorable bifunctional oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalytic properties is a critical influence factor for its large-scale application. In this paper, the composites (preTiO 2 @hG) consisting of the precursor of titanium dioxide and hydrophilic graphene were successfully prepared in a Rotating Packed Bed by high-gravity technology. Then, N and Co elements were doped by hydrothermal-reduction method to obtain composite catalyst CoO-TiO 2 @NG, which had excellent catalytic performances of both OER/ORR. The value of ΔE is 0.685 V for CoO-TiO 2 @NG. When used as the catalyst on the air cathode of rechargeable ZABs, the device exhibits a high power density of 146.8 mW/cm 2 and a large specific capacity of 815.8 mAh/g. It also has good cycle stability, the ZAB capacity using CoO-TiO 2 @NG as catalyst does not significantly decrease after more than 110 h of charging-discharging cycles. The improvement of OER and ORR catalytic performance of CoO-TiO 2 @NG is due to the synergistic effect of CoO, TiO 2 and N-doped graphene. This article provides a new method for low-cost and scalable preparation of bifunctional OER/ORR non-precious metal catalysts with novel component and high performances.
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高影响因子
Materials Today Sustainability
·
2024
·
IF 7.1
Zhuo Chen,Qiang Qu,Zhi-Zhen Chi,Yang Hu,Lin Zhu,Ming-Qiang Zhu
Zinc-ion hybrid supercapacitors (ZIHSCs) represents a promising technological approach for large-scale energy storage with the combined advantages of supercapacitors and zinc-ion batteries. Unfortunately, it is still challengeable to quickly fabricate low-cost, high-performance carbonaceous cathode materials at relatively low temperature. To address such issues, herein, taking waste Eucommia ulmoides Oliver (EUO) wood as an example, we present a novel microwave-assisted carbonization (MWC) approach at relatively low temperature to quickly prepare active carbon, and we present a synergistic strategy to significantly enhance the electrochemical performance by introducing sodium bicarbonate activation (SA) and constructing conductive carbon nanotubes (CNT) networks. The MWC-SA@CNT hybrid exhibits outstanding specific capacitance of 344.2 F/g at 0.2 A/g within three-electrode system, much better than conventional high-temperature pyrolyzed AC, MWC carbon, and MWC-SA carbon. The superior performance of MWC-SA@CNT can be attributed to the synergistic effect of its large specific surface area of 1102.7 m 2 /g, high mesoporous percentage of 53.5%, and rich –OH and C O groups due to microwave-assisted carbonization and sodium bicarbonate activation, and rich electron transport paths due to the presence of CNT networks. Furthermore, ZIHSCs assembled by MWC-SA@CNT cathode could delivers impressive performance with excellent capacity (194.37 mA h/g at current density of 1 A/g), energy density (142.30 Wh/kg), and durability (capacitance retention rate of 97.65% after 5000 cycles). This work offers a rapid and low-temperature method for preparing wood-based active carbon with rich nanopores and strong conductivity to improve performance of Zinc ion storage.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Yang Jie,Fang Hailong,Jiang Huanjin,Wang Wenhao,Chen Jixiang
MgO–Al 2 O 3 -supported metallic Ni and bimetallic Ni–Zn catalysts (referred as Ni/MgAl and Ni x Zn/MgAl with the Ni/Zn atomic ratio of x , respectively) were prepared by the coprecipitation method, and their performance for methane dry reforming (DRM) was tested on an atmospheric quartz fixed-bed. The XRD, magnetic measurement, H 2 -TPR, TEM/EDS and XPS results demonstrate that metallic Ni and Ni–Zn alloy form in Ni/MgAl and Ni x Zn/MgAl, respectively. With reducing the Ni/Zn atomic ratio, the amount of surface Ni sites decreases, while the CO 2 adsorption capacity and strength increase due to the presence of Zn. Ni x Zn/MgAl gives higher activity than Ni/MgAl for DRM, mainly due to the suppression of carbon deposition and graphitization on Ni–Zn alloy and the enhanced adsorption of CO 2 . Under the condition of 800 °C, CH 4 /CO 2 molar ratio of 1 and weight hourly space velocity of 20,000 mL g cat −1 h −1 , Ni/MgAl gives the CH 4 and CO 2 conversions of 76% and 80%, respectively. With decreasing Ni/Zn atomic ratio from 7 to 2, the CH 4 and CO 2 conversions on Ni x Zn/MgAl first increase and then decrease, and Ni 5 Zn/MgAl has the highest activity with the CH 4 and CO 2 conversions of 81% and 87%, respectively. During the time on stream of 100 h at 800 °C, Ni 5 Zn/MgAl exhibits better stability than Ni/MgAl, mainly ascribed to its less amount of filamentous graphite carbon. In all, the formation of Ni–Zn alloy enhances the catalyst activity and remarkably suppresses the graphitization of carbonaceous deposit.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Peng Wang,Zijing Liu,Yanwei Xing,Bin Fan,Yulong He,Ting Gao,Wenlei Zhang,Yunfei Gao,Shuang Wang,Jinping Li
Electrocatalytic nitrogen reduction reaction (ENRR) is considered as a potential pathway for green synthesis of ammonia. However, the kinetic barriers of ENRR remain a tough challenge, which is imperative to design high effective electrocatalysts for accelerated activation of N N. Herein, the FeS/ZnS/ZIF-8-L with rich heterogeneous interfaces was successfully fabricated by governing the ordered lasso arrangement of Fe and Zn nodes in Fe-2MIM/ZIF-8-L precursor, where Fe and Zn were separately fixed in the confined space of ZIF-8-L and Fe-2MIM. Such intertwined Fe-2MIM/ZIF-8-L structure was beneficial to control the location and concentration of FeS and ZnS after sulfidation pyrolysis. The high-efficiency FeS/ZnS/ZIF-8-L exposed more catalytic active sites and possessed optimal electronic structure resulting in the lowered energy barrier of ENRR and the enhanced adsorption and activation of N 2 , which confirmed by experimental and theoretical characterization results. As a result, FeS/ZnS/ZIF-8-L displayed an optimal NH 3 yield rate of 89.52 μg h −1 mg −1 and Faradaic efficiency of 16.78 %, which surpassed most reported heterostructured ENRR catalysts. Our findings shed a new insight to govern the interfaces density of heterostructured electrocatalysts by predesigning the location of two metals in precursor, which can motivate an in-depth exploration to advanced catalysts for various electrocatalytic reactions.
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高影响因子
PLoS One
·
2020
·Vol. 15
·期 1
·e0228247
·
IF 2.74
Congcong Liu,Jingcheng Wang,Chengde Gao,Zhenting Wang,Xiaohua Zhou,Mingying Tang,Kun Yu,Youwen Deng
Magnesium-based biomaterials are attracting increasingly more attention for orthopedic applications based on their appropriate mechanical properties, biodegradability, and favorable biocompatibility. However, the high corrosion rate of these materials remains to be addressed. In this study, porous β-Ca 3 (PO 4 ) 2 /Mg-Zn (β-TCP/Mg-Zn) composites were fabricated via a powder metallurgy method. The β-TCP/Mg-Zn composites with 6% porosity exhibited optimal mechanical properties, and thus, they were selected for surface modification. A novel dopamine/gelatin/recombinant human bone morphogenetic protein-2 (rhBMP-2) coating with demonstrated stability was prepared to further improve the corrosion resistance of the composite and enhance early osteoinductivity. The homogeneously coated β-TCP/Mg-Zn composite showed significantly improved corrosion resistance according to electrochemical and immersion tests. In addition, extracts from the dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn composite not only facilitated cell proliferation but also significantly enhanced the osteogenic differentiation of Sprague–Dawley rat bone marrow-derived mesenchymal stem cells in vitro . Furthermore, in vivo experiments were performed to evaluate the biodegradation, histocompatibility, and osteoinductive potential of the coated composite. No obvious pathological changes in the vital visceral organs were observed after implantation, and radiography and hematoxylin-eosin staining showed strong promotion of new bone formation, matched composite degradation and bone regeneration rates, and complete absorption of the released hydrogen gas. Collectively, these results indicate that the dopamine/gelatin/rhBMP-2–coated β-TCP/Mg-Zn composite offers improved corrosion resistance, favorable biocompatibility, and enhanced osteoinductive potential for use in the fabrication of orthopedic implants.
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PubMed
高影响因子
CATALYSIS LETTERS
·
2016
·Vol. 147
·期 2
·502-508
·
IF 2.294
Chen Yao,Liu Cheng-chao,Zhang Yu-hua,Zhao Yan-xi,Wei Liang,Wen Xiong,Zhao Xin,Li Jin-lin
Abstract Hierarchically ZSM-5 zeolite was prepared by alkali treatment. It was used as a support for a series of Co-based catalysts for Fischer–Tropsch synthesis with Fe, Ti, Ga or Zn as promoter. This series of catalysts were named Co/M-ZSM-5 (M = Fe, Ti, Ga or Zn). The catalysts were characterized by SEM, XRD, H 2 -TPR, and XPS, and the FTS catalytic performance of catalysts were compared. The character date revealed that the promoter changed the dispersion, reducibility and stability of Co. The addition of Zn and Ga increased the activity of catalysts, decreased the selectivity to CH 4 . The Ti promoted catalyst had the highest initial activity, but it deactivated rapidly. The suitable interaction between Co and the Fe-ZSM-5 result in the suitable dispersion and reduction. Thus Fe is the better promoter for the catalyst Co/ZSM-5. Graphical Abstract
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高影响因子
Catalysts
·
2024
·Vol. 14
·期 1
·88
·
IF 3.8
Zheng Dong,Yuanchong Yue,Jianmei Bai,Kun Chen,Mei Wang,Quan Bu
Peanut shells, a major economic and oil crop in China, boast an abundant availability and remarkably high lignin content compared to other agricultural residues. Previous work indicated that the modified hierarchical zeolite (Zn-ZSM-5/MCM41) was effective in promoting the conversion of intermediate macromolecules during the lignin pyrolysis reaction and enhancing the yield and selectivity of liquid products. Thereby, this study aims to improve the quality of liquid products in the ex situ catalytic microwave co-pyrolysis of peanut shells and LDPE by utilizing Zn-ZSM-5/MCM41. Employing a compound center experimental design, we optimized reaction conditions through response surface analysis. The impact of microwave pyrolysis temperature and the catalyst-to-feedstock ratio on yield distribution and liquid product selectivity was explored. Results indicated a marginal increase in liquid product yield with rising pyrolysis temperatures. Moreover, an initial increase followed by a subsequent decrease in liquid product yield was observed with an increase in the catalyst-to-feedstock ratio. Optimal conditions of 450 °C and a catalyst-to-peanut hull ratio of 2.34% yielded the highest bio-oil yield at 34.25%. GC/MS analysis of the bio-oil revealed a peak in hydrocarbon content at 68.36% under conditions of 450 °C and a catalyst-to-feedstock ratio of 13.66%. Additionally, the quadratic model effectively predicted bio-oil yield and the selectivity for major chemical components. This study underscores the potential of Zn-ZSM-5/MCM41 in optimizing liquid product quality during catalytic co-pyrolysis, offering insights into bio-oil production and its chemical composition.Keywords:bio-oil;pyrolysis;catalyst;LDPE;biomass
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高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Danke Chen,Jiapeng Ji,Zhongqing Jiang,Min Ling,Zhongjie Jiang,Xinsheng Peng
Transition metal-nitrogen-carbon (M/N/C) catalysts, Fe/N/C in particular, with low cost, good tolerance to methanol and promising activity has great potential to replace Pt-based catalysts in oxygen reduction reaction (ORR). However, for metal atoms are easy to migrate and agglomerate during pyrolysis , it still remains a challenge to rationally design precursors to synthesize highly active M/N/C without significant agglomeration of metal sites. In this work, we propose a molecular-confinement strategy to synthesize sub-nano Fe/N/C catalysts by confinement [Fe(CN) 6 ] 3- in zeolitic imidazolate framework-8 (ZIF-8) crystals to minimize the agglomeration of Fe atoms during pyrolysis . The half-wave potential of the prepared sub-nano Fe/N/C is 40 mV superior to that of commercial 20% Pt/C in alkaline medium . Besides, it has electron transfer number close to 4.00, with below 0.5% H 2 O 2 yield, excellent long-term stability with only −5 mV shifts after 10000 cycles, and superb methanol tolerance. When utilized in Zn-air batteries as the cathode, it exhibits better activity, stability, and higher specific capacity than that of Pt–RuO 2 /C, showing a good potential for air cathode.
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高影响因子
危险品化学品经营许可证（带存储）