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
Journal of Materials Chemistry A
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2016
·Vol. 4
·期 10
·3822-3827
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IF 8.262
Fang He,Gang Chen,Yansong Zhou,Yaoguang Yu,Laiquan Li,Sue Hao,Bin Liu
A ZIF-8 derived carbon (C-ZIF)/g-C3N4 composite was constructed for the first time through facile thermal condensation of a zeolitic imidazolate framework (ZIF-8) and melamine. The obtained C-ZIF/g-C3N4 composite exhibited an obviously enhanced photocatalytic H2 production rate compared to pure g-C3N4 under visible light irradiation. The 1 wt% C-ZIF/g-C3N4 composite without loading the Pt co-catalyst showed 36.2 times higher H2 evolution rate than that of pure g-C3N4, which is even 2.8 times higher than that of Pt/g-C3N4 (the state-of-the-art g-C3N4-based photocatalyst). It was revealed by photoluminescence spectroscopy, time-resolved fluorescence spectroscopy and electrochemical impedance spectroscopy that the formed C-ZIF and g-C3N4 junction could promote quick charge carrier separation and transfer. The C-ZIF not only acted as an effective electron acceptor, but also functioned as an efficient hydrogen evolution reaction (HER) cocatalyst to promote photocatalytic hydrogen evolution. Our work provides an effective way for the development of metal-free, all carbon-based photocatalysts for H2 evolution.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Molecular Catalysis
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2019
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IF 2.938
Zhi-Xin Li,Xian-Yong Wei,Guang-Hui Liu,Xing-Long Meng,Zheng Yang,Shuo Niu,Di Zhang,Hua-Shuai Gao,Zhi-Hao Ma,Zhi-Min Zong
Highly selective hydrogenation of furfural and levulinic acid (LA) was studied over Ni 0.09 Zn/NC 600 derived from zeolitic imidazolate frameworks. The existence of active Ni 3 ZnC 0.7 particles in Ni 0.09 Zn/NC 600 was confirmed by multiple characterizations. As a result, over Ni 0.09 Zn/NC 600 , 99.7% of furfural conversion (FC) and 100% of furan-2-ylmethanol selectivity (FMS) were achieved in isopropanol (IP) at 170 °C for 2 h, while FC and (tetrahydrofuran-2-yl)methanol (THFM) selectivity are 97.5% and 86.4% in water at 150 °C for 1 h. Over the same catalyst, LA was completely converted to γ-valerolactone in water at 95 °C for 0.5 h. The catalyst is still highly active after 6 cycles of recycling with 92.8% of FC and 100% of FMS in IP at 170 °C for 1.5 h and 90.1% of LA conversion and 100% of γ-valerolactone selectivity in water at 80 °C for 0.5 h.
研究领域:
化学工程
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催化科学
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产品关联
DOI
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
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Jingjing Liu,Yu Peng,Bicheng Zhu,Youji Li,Liuyang Zhang,Jiaguo Yu
Triethylamine , as a typical gas of volatile organic compounds, is a growing threat to human health due to its extensive applications in industry. In this study, ZIF-8 derived ZnO polyhedrons are decorated by CsPbBr 3 quantum dots via electrostatic adsorption. Then a highly sensitive sensor towards triethylamine based on ZnO-CsPbBr 3 composite is successfully fabricated. Compared with sensors based on pristine ZnO and ZnO (nanoparticles)-CsPbBr 3 , ZnO-CsPbBr 3 displays a higher response value (~ 60 towards 100 ppm of TEA), shorter response/recovery time (2/18 s), and lower detection limit (5 ppb). Thus, highly-sensitive detection and efficiently-catalytic oxidation of trimethylamine can be achieved. Such distinguished performance can be ascribed to its unique architecture and n-n heterojunction . Notably, the sensing mechanism is thoroughly interpreted by X-ray photoelectron spectroscopy, temperature programmed desorption of O 2 and in-situ diffuse scattering Fourier transform infrared spectra.
研究领域:
材料科学
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化学传感器
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2023
·Vol. 98
·期 5
·1166-1174
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IF 3.4
Min Yuan,Zhiqing Liu,Tiantian Lv,Jinxiang Dong,Qi Shi
BACKGROUND The separation of furfural from a low-concentration multicomponent and acid-containing aqueous solution is a highly demanding process; traditional distillation requires an excessive amount of energy. Herein, we demonstrated ZIF-8-derived microporous carbon (C) as a promising adsorbent for the separation of furfural using adsorption isotherms, dynamic column adsorption, adsorption kinetics and desorption studies. RESULTS In the competitive adsorption kinetics experiments with a furfural/acetic acid concentration of 50/20 g L −1 , the acetic acid adsorbed in the micropores of NC ZIF-8 1000C-800A gradually was replaced by furfural, whereas the amount of acetic acid in the mesopores of NC ZIF-8 800C-800A slowly increased. In addition, the micropores of NC ZIF-8 1000C-800A exhibited highly efficient and fast adsorption characteristics toward furfural over a wide furfural/acetic acid concentration range (0–50/0–20 g L −1 ) with the furfural adsorption capacity reaching an adsorption equilibrium within 10 min. The results show that the high Brunauer–Emmett–Teller surface area of NC ZIF-8 1000C-800A is responsible for the high furfural adsorption capacity (1205.3 mg g −1 ) and the confined microporous structure can strengthen the π–π interactions between porous C and furfural, thereby enhancing the selectivity of furfural/acetic acid (61.4) in the furfural/acetic acid (50/20 g L −1 ) dynamic column adsorption system. Meanwhile, the desorption ratio of furfural in the dynamic desorption system reached as high as 98.6%. CONCLUSION The unique micropore-confinement effect and excellent adsorption behavior make NC ZIF-8 1000C-800A an efficient adsorbent for furfural in the furfural–acetic acid system. © 2023 Society of Chemical Industry (SCI).
研究领域:
化学工程
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材料科学
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环境科学
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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
Nanomaterials
·
2019
·Vol. 9
·期 1
·117
·
IF 4.034
Hongmei Tang,Wenyao Li,Haishun Jiang,Runjia Lin,Zhe Wang,Jianghong Wu,Guanjie He,Paul Robert Shearing,Dan John Leslie Brett
The harmful nature of high concentrations of antibiotics to humans and animals requires the urgent development of novel materials and techniques for their absorption. In this work, CTAB (Cetyltrimethyl Ammonium Bromide)-assisted synthesis of ZIF-8 (zeolitic imidazolate framework)-derived hollow carbon (ZHC) was designed, prepared, and used as a high-performance adsorbent, and further evaluated by Langmuir and Freundlich isothermal adsorption experiments, dynamic analysis, as well as theoretical calculation. The maximum capacities of ZHC for adsorbing tetracycline (TC), norfloxacin (NFO), and levofloxacin (OFO) are 267.3, 125.6, and 227.8 mg g−1, respectively, which delivers superior adsorptive performance when compared to widely studied inorganic adsorbates. The design concept of ZIF-8-derived hollow carbon material provides guidance and insights for the efficient adsorbent of environmental antibiotics.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Cheng Zhou,Lina Wang,Junting Sun,Hongbo Wu,Jian Zhang,Zhong Li
Enhancing oxygen reduction reaction (ORR) efficiency relies heavily on designing non-noble metal single-atom catalysts (SACs) with high-density and high-activity sites. For efficient ORR, Fe single atoms are precisely regulated and embedded into porous concave carbon derived from ZIF-8 in this work. ORR performance is significantly improved by the catalyst's concave design and microporous features, which optimize mass transfer and expose more active sites. Furthermore, the high-density, high-activity, and high-spin Fe (III) sites inside the material help to explain the increased intrinsic activity of the catalyst. Due to its unique carrier structure and iron site coordination, this catalyst exhibits outstanding ORR activity in a 0.1 M KOH solution. Additionally, zinc-air batteries constructed with this catalyst display a maximum peak power density of 151 mW cm −2 and a high specific capacity of 818 mAh g Zn −1 , outperforming Pt/C-based systems. This study presents a method for precursor treatment to efficiently and conveniently synthesize microporous carbon-based ORR SACs, aiming to advance ORR catalyst design.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Frontiers in Chemistry
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2022
·
IF 5.545
He Limin,Wang Yangdong,Wang Can,Liu Zhicheng,Xie Zaiku
The hydrogenation of 4-carboxylbenzaldehyde over Pd catalysts is a crucial process during the production of pure terephthalic acid. Herein, ZIF-8 derived carbon materials (NC) with adjustable N types were synthesized and used as the supports of Pd catalysts. Pd supported on NC with 50.5% of pyridinic N exhibited best hydrogenation activity with a TOF value of 4.1 min−1. The microstructures of NC support and electronic structures of Pd in Pd/NC were investigated by techniques such as XRD, N2 physisorption, XPS, H2-O2 titration and TEM. The nitrogen species in CN surface not only can adjust chemical state and dispersion of Pd nanoparticles (NPs), but also promote the adsorption and activation capability of H2 molecular. Besides, the ratio of Pd0/Pd2+ and Pd dispersion were closely correlated with pyridinic nitrogen content. The improvement in hydrogenation activity and stability of Pd/CN catalyst in relative to Pd/C were ascribed to the synergistic effect of pyridinic nitrogen and active site Pd0.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
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