JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Jiaojiao Cao,Chengbin Guo,Xingpeng Guo,Zhenyu Chen
A zeolitic imidazole framework-8 (ZIF-8) derivative was synthesized and developed as the corrosion inhibitor of copper in 0.5 mol/L NaCl solution, and its inhibition performance was investigated by electrochemical measurement and surface analysis . Results show that the ZIF-8 derivative could effectively inhibit copper from corrosion, and the inhibition efficiency was 87.2% at an optimal ZIF-8 derivative concentration of 45 mg/L. The corrosion inhibition mechanism of the ZIF-8 derivative could be explained as follows: the amino functional groups and the π-system formed by aromatic rings of the ZIF-8 derivative were tightly adsorbed on the copper substrates, which systematically formed a hydrophobic film, thereby effectively inhibiting the corrosion caused by aggressive ions.
研究领域:
材料科学
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电化学
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表面分析
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DOI
高影响因子
MATERIALS LETTERS
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2020
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IF 3.204
Feihong Wang,Tong Zheng,Panpan Wang,Jun Ma
In this study, we investigated the influences of zeolitic imidazolate framework-8 derived porous carbon (CZIF-8) on the permeation and antifouling property of thin-film nanocomposite membranes (TFN). The incorporation of CZIF-8 into polyamide layer enhanced the water flux from 11.64 to 18.23 L/m 2 ∙h without decreasing NaCl rejection. Dynamic fouling tests with bovine serum albumin illustrated that the TFN membrane possessed an enhanced antifouling property after three cycles. The higher water flux recovery ratio and the lower fouling ratio of TFN membranes are attributed to the changes in physiochemical property of membrane.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
RSC Advances
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2019
·Vol. 9
·期 60
·35189-35196
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IF 3.049
Yi-Wei Cui,Hai-Huan Zhang,Shi-Yong Yu
Efficient C–ZnS/ZnMoO4@MoS2 and C–ZnS/MoS2 nanocomposite photocatalysts, using ZIF-8 derived C–ZnO as a precursor were successfully synthesized using a simple one-pot procedure. This is the first application that involves transforming ZIF-8 into C–ZnMoO4 for photocatalysis. The C–ZnS/ZnMoO4@MoS2 and C–ZnS/MoS2 heterostructures were characterized by X-ray diffraction, UV-vis, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, photocurrent measurements, scanning electron microscopy and transmission electron microscopy. The ZM2 sample of C–ZnS/ZnMoO4@MoS2 exhibited enhanced photocatalytic activity of about 2.9 times as high as that of ZIF-8 derived C–ZnO in the reduction of tetracycline hydrochloride, and also showed obvious photocatalytic activity 1.81 and 3.33 times as high as that of a ZM3 sample of C–ZnS/MoS2 and ZIF-8 derived C–ZnO in the degradation of RhB, respectively. The improved photodegradation activity is a result of the heterogenous structure and the tighter contact between C–ZnS and C–ZnMoO4 compared with the physical contact of general heterogenous photocatalysts. The C–ZnS/ZnMoO4@MoS2 heterostructure photocatalyst is expected to be a new type of nanomaterial for the degradation of pollutants from wastewater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Min Yuan,Tianchang Liu,Qi Shi,Jinxiang Dong
Efficient separation of furfural from an acid-containing aqueous solution is a critical step in the furfural production process. Zeolitic imidazolate framework (ZIF)-derived porous carbons with acid resistance and tunable surface chemistry/pore structure are promising adsorbents for the separation of organic compounds from acid-containing aqueous solutions. However, little attention has been given to establish the trend of distribution of micropores and mesopores in the chemical activation of ZIF-derived porous carbon, which directly affects the adsorption performance. Herein, we investigated the relationship between the distribution of micropores and mesopores and the N species content/type in the chemical activation of the N-doped ZIF-8-derived porous carbon, and the KOH activation mechanism was proposed. The intermediates K 2 CO 3 /K 2 O reacted with the C species of NC ZIF-8 1000C with a low N content, the CO was formed, and the structural deformation was not substantial, which is beneficial for the construction of abundant and larger micropores (10–20 Å), and a few mesopores (20–30 Å). While the reaction of the intermediate K 2 CO 3 /K 2 O with the higher-reactivity C–N species (pyridine and pyrrolic) of NC ZIF-8 800C with a high N content resulted in the formation of the intermediate product KOCN and decomposition product CO and NO, and the structural deformation was substantial, which led to the formation of abundant and larger mesopores (30–60 Å). Furthermore, the furfural (5.0 wt.%) static adsorption on the designed NC ZIF-8 1000C-700A with the abundant micropores is 1189.8 mg g −1 , and the selectivity of furfural/acetic acid mixture (5.0/2.0 wt.%) is 91.5, which exceeds that of traditional adsorbents.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Chen Zhe-qin,Zhong Xiao-cong,Xie Yong-min,Liu Jia-ming,Xu Zhi-feng,Wang Rui-xiang
Metal–air batteries have shown tremendous potential as devices for electrical energy storage and conversion; however, their commercial applications are limited owing to the high costs of precious metal catalysts. In this study, urea was employed as a dispersant and as an additional nitrogen source to synthesize zeolitic imidazolate framework-derived iron-nitrogen-carbon catalysts (ZIF-8-derived Fe-NCs). The fabricated nitrogen-rich catalyst was found to have a high specific surface area and numerous surface defects, while maintaining the original ZIF-8 morphology. Electrochemical analysis with a rotating ring-disk electrode revealed that the onset potential of nitrogen-rich Fe-NC was 0.91 V at 1600 rpm with a limiting current density of 5.38 mA·cm −2 , which indicated a high catalytic activity for the oxygen reduction reaction. Additionally, the decent stability of the catalyst was confirmed by a 2 h cycle test.
研究领域:
材料科学
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电化学
·
能源存储与转换
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Hanhan Lv,Daniel K. Macharia,Zixiao Liu,Lisha Zhang,Chiyan Yu,Chihao Lu,Huansheng Liu,Yumei Zhang,Zhigang Chen
Photothermal catalysis has attracted increasing attention due to the efficient utilization of sustainable solar energy and high catalytic activity. However, its practical application is still limited due to the complex synthesis and low surface area of photothermal materials, as well as the challenges of distinguishing the effects of hot electrons and localized heating. To solve these issues, ZIF-8 derived porous carbon (ZPC) nanocrystals were constructed as high surface area photothermal materials and then decorated with Au nanoparticles as the catalytic components. Au/ZPC nanocomposites are prepared by the assembly of ZIF-8, the pyrolysis and in-situ Au reduction process. They are composed of rhombic dodecahedron-shaped ZPC with an average diameter of ∼120 nm, where Au nanoparticles (2–8 nm) are dispersed well on the surface or within the pore structure of ZPC . Besides, Au/ZPC exhibits a wide range of light absorption between 200 and 1100 nm and high photothermal efficiency of 45 %. With 4-nitrophenol (4-NP) reduction reaction as a model system, Au/ZPC catalyst exhibits a 2-fold increase in the rate of 4-NP reduction when exposed to an 808 nm laser irradiation, in comparison to thermocatalysis at the same temperature. Furthermore, the activation energy for the reduction of 4-NP via photothermal catalysis was much lower than that of thermocatalysis (74.16 vs. 104.26 kJ mol −1 ). By excluding hot electrons effects by transient absorption (TA) spectra, we can establish that the increase of photothermal catalysis rate should result from the localized heating which can decrease the energy barriers for the reduction of 4-NP. Additionally, Au/ZPC displays high stability and maintains remarkable activity even after five cycles. This study may provide some new perspectives for the design and development of efficient photothermal catalysts.
研究领域:
材料科学
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催化化学
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光化学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2024
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IF 6.5
Xiaoqing Gao,Shanhui Zhu,Mei Dong,Hongyan Zheng,Yanfeng Xue,Xiaojing Cui,Yulan Niu,Weibin Fan
Highly efficient synthesis of valuable γ-valerolactone (GVL) by levulinic acid (LA) hydrogenation is of interest for biomass refinery, but it suffers from great challenge to design highly active Ru-based catalyst at low temperature. ZIF-8 derived ZnO@NC nanocomposite can firmly anchor Ru nanoparticles to create strong Ru-ZnO interfacial structure, as revealed by characterization techniques and DFT calculations. By optimizing Ru content and ZnO particle size, Ru/ZnO@NC achieved excellent reaction activity with a turnover frequency (TOF) of 6032 h −1 at low temperature of 40 °C, which is never reported before. After etching the accessible ZnO, the TOF value was significantly declined to 125 h −1 on Ru/ZnO@NC-HF owing to the lack of effective Ru-ZnO interface. DFT calculation results demonstrate that the Ru-ZnO interfacial structure can facilitate the activation of intermediate CH 3 CHOCH 2 CH 2 COOH* and remarkably decline the activation energy barrier of rate-determining step (CH 3 CHOCH 2 CH 2 COOH + H = HPA) from 1.28 eV to 0.82 eV, thus leading to excellent activity of LA hydrogenation at low temperature.
研究领域:
催化化学
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生物质能
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Jinling Xie,Xuan Luo,Liu Chen,Xiaobo Gong,Lingrui Zhang,Jing Tian
Boron and nitrogen co-doped porous carbon material (B-NPC) derived from zeolitic imidazolate frameworks (ZIF-8) was well prepared, characterized, and performed as an excellent metal-free carboncatalyst to activate peroxymonosulfate (PMS) for tetracycline hydrochloride (TC) degradation. Almost 100% of TC was removed within 60 min using 10 mg B-NPC, 20 mg PMS at 25 ℃. The co-doping of boron and nitrogen significantly improved the catalytic performance of PMS activation . The co-doping of B, N not only provided abundant active sites, but also enhanced the specific surface area and porous structure. Furthermore, free radicals combined with the non-radical mechanism worked together in B-NPC/PMS system to efficiently degrade TC. The B species, pyridinic N and graphite N on carbon matrix played major roles in activating PMS and degrading TC. Coexisting ions, humic acid and water qualities barely affected TC degradation efficiency in B-NPC/PMS system. Metal-free B-NPC catalysts also showed excellent reusability and notable adaptability to various pollutants. Moreover, possible TC degradation pathways were proposed. The main intermediate and final products showed significant decrease in biotoxicity compared to TC. This study provides a novel strategy for designing efficient metal-free PMS activator to degrade antibiotics in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2022
·
IF 7.34
Qiushi Jiang,Zhaolian Han,Yinjie Qian,Yafeng Yuan,Yating Ren,Mingyu Wang,Zhiqiang Cheng
A novel strategy for the preparation of heterojunction derivants by regulating the loading of precursors was proposed and applied for the first time to effectively remove dyes and antibiotics. Zeolite imidazole framework-8 (ZIF-8)-derived ZnO/TiO 2 nano-burst-tube (NBT) was prepared by calcination of ZIF-8 as precursor grown in a solvothermal system adjusted by NH 4 OH or NaOH , TiO 2 NBT as solvothermal substrate. Through a reasonable selection of solvothermal system, ZIF-8-derived ZnO/TiO 2 NBT not only provides enhanced specific surface area (1012.3 m 2 /g), but also enhances the visible light response and charge separation of TiO 2 NBT, whose instantaneous photocurrent density is up to 53 mA cm −2 , which is three times that of TiO 2 NBT. Under visible light irradiation, ZnO/TiO 2 NBT achieved rapid degradation of Rhodamine B(RhB), tetracycline hydrochloride (TCH) and chlortetracycline hydrochloride (CTC) with complete removal within 20 min, outperforming ZnO, ZIF-8, TiO 2 NBT and ZIF-8/TiO 2 NBT, with excellent cyclic photocatalytic performance. The results show that the degradation pathways of RhB, TCH and CTC are different. The work provides a promising strategy for multifunctional derivative photocatalytic materials preparation.
研究领域:
材料科学
·
环境科学
·
光催化技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lianqin Wang,Jie Yao,Yabiao Pei,Weikang Zhu,Zhizhao Che,Junfeng Zhang,Yan Yin,Michael D. Guiver
Microporous layers play a crucial role as one of the main components of the membrane electrode assembly (MEA) in facilitating effective water management for proton exchange membrane fuel cells (PEMFCs), which is vital for maintaining optimal performance in a wide humidity range . Herein, Zn-based zeolitic imidazolate framework-8 (ZIF-8)-derived material (ZDM) as a porous carbon material is first developed to construct the microporous layer (MPL). With higher gas permeability , improved water management, and increased electrical conductivity , the MPL equipped with a ZDM layer, denoted as MPL-Z, exhibits superior performance, surpassing commercial MPLs throughout the range of 30–100% relative humidity (RH). The peak power density of an H 2 /air PEMFC at 70% RH utilizing a MPL-Z is 3.3 times that of commercial MPL. Furthermore, a unique patterned dual MPL is designed to boost the performance, ultimately achieving a peak power density of 1.50 W cm −2 (H 2 /air) with a low total Pt loading of 0.3 mg Pt cm −2 at 100 % RH. Even at only 30% RH, the peak power density can reach 0.72 W cm −2 (H 2 /air). The results demonstrate that the material and structural design of the MPL allows for the efficient operation of low Pt loading PEMFCs over a wide humidity range.
研究领域:
电化学
·
能源材料
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纳米结构材料
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燃料电池技术
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界面工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）