COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Peizhang Zhou,Yuanyang Yan,Jiang Cheng,Cailong Zhou
In this work, stainless steel mesh coated with stearic acid and tetradecanedioic acid modulated ZIF-67 (SA+TDA/mZIF-67@SSM) was prepared via facile electrodeposition . The composite modulators supply defect engineering on the MOFs , endowing the as-prepared meshes with pH-switchable wettability . The ratio of modulators significantly affected the crystal morphology and wetting property of SA+TDA/mZIF-67@SSM, resulting from the competitive coordination between the modulation and crystal growth process. The SA+TDA/mZIF-67@SSM exhibited highly hydrophobic, while it became amphiphilic after soaked in alkaline solution because some exposed carboxylic acid groups on the mesh were deprotonated. The SA+TDA/mZIF-67@SSM achieved efficient and adjustable organic liquids separation, with the separation efficiency both up to 98% before and after the wettability transition. In addition, the SA+TDA/mZIF-67@SSM could realize the separation of oil/water/oil mixtures, with the separation efficiency larger than 98%. This work introduces a new technique of modulated MOFs coated mesh with pH-responsivity for separating organic liquids based on defect engineering.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Shuoqi Zhang,Mingxing Zhao,Lei Shi,Chunsheng Lei
In this paper, a novel Z-scheme BiOI/ZIF-67 photocatalyst (BOI/ZIF) was successfully prepared using an in-situ growth method, and its effectiveness in degrading tetracycline (TC) under visible light was assessed. Using a range of characterization techniques, the crystal structure, elemental composition, microstructure and optical characteristics of the composite catalyst were examined. Simultaneously, a 30 % mass ratio catalyst (BOI/ZIF-30) could remove 91 % of TC under visible light, which was 41 % and 28 % greater than the degradation rates of BiOI and ZIF-67, respectively. These results demonstrated that BOI/ZIF exhibited strong photocatalytic activity and excellent stability. The results of the radical quenching experiment and electron spin resonance revealed that h + and •O 2 − were the principal chemical substances responsible for TC degradation, corresponding with the suggested charge transfer mechanism of Z-scheme heterojunction. The Z-scheme heterojunction created between BiOI and ZIF-67 improved the effective separation of photogenerated carriers and boosted the efficiency of TC degradation. This study offers a promising method for designing photocatalytic systems to break down antimicrobial contaminants.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Micro & Nano Letters
·
2020
·Vol. 15
·期 7
·425-429
·
IF 0.975
Yuqiong Shi,Beibei Qiu,Xiangrong Wu,Yuxuan Wang,Jinhua Zhu,Xiuhua Liu,Dongbao Zhao
To extend the wide application range of luteolin (LUT), a slow-release drug delivery system is urgently needed. In this work, Fe 3 O 4 @ZIF-67 was reported as the carrier of LUT. A facile synthesis method of Fe 3 O 4 @ZIF-67 was established with simply continuous stirring. The structure and function of the nanocomposites were characterised by SEM, TEM, XRD, FTIR, VEM and TGA. Under the optimal reaction conditions, the maximum drug loading capacity of the carrier was obtained to be 308.07 µg/mg. And LUT was released about 55% from Fe 3 O 4 @ZIF-67 after 72 h. The adsorption kinetics and release kinetics of LUT were also investigated. The results showed that the relationship between time and drug loading fitted well with the quasi-second-order kinetic equation ( R 2 = 0.99) and the release mechanism followed the Sigmoidal model ( R 2 = 0.98). In short, Fe 3 O 4 @ZIF-67 could be developed as a carrier of the LUT delivery system for slow release.
研究领域:
药剂学
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材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Sumbal Farid,Weiwei Qiu,Jialin Zhao,Xuedan Song,Qing Mao,Suzhen Ren,Ce Hao
In recent years, a noticeable shifting from conventional fossil fuels to renewable energy based systems has embarked electrochemical splitting of water as the most promising way to produce clean energy of hydrogen. Generally, the lack of active and stable electrocatalysts for oxygen evolution reaction (OER) limits the practicability of water splitting as a renewable source of energy. In this work, interconnected 3D structure of cobalt oxides nanoparticles (Co 3 O 4 NPs) derived from ZIF-67 with nitrogen-doped carbon nanotubes (N-CNTs) of polypyrrole (PPy) origin is successfully synthesized as OER electrocatalysts. Impressively, the highly conductive N-CNTs that run through the Co 3 O 4 NPs not only endow the resulting product Co 3 O 4 /N-CNTs with large active surface area and enhanced charge transfer between Co 3 O 4 NPs, but also prevent Co 3 O 4 NPs from aggregation. As a result, the as-synthesized Co 3 O 4 /N-CNTs electrocatalyst exhibits outstanding OER activity with a low onset potential of ~1.37 V (vs RHE), overpotential of only 200 mV to attain a stable current density of 10 mA cm − 2 in basic media and very small Tafel slope of 40 mV dec − 1 . Moreover, the enhanced nitrogen-content also improves the OER kinetics by proficient charge transfer. The superb electrocatalytic performance and higher stability make the Co 3 O 4 /N-CNTs a proficient non-precious electrocatalyst for the OER.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xinghang Duan,Zebing Wang,Tiantian Cao,Qiaolin Li,Gang Chen,Hongtao Guan,Chengjun Dong
Although molybdenum carbide (Mo x C) has emerged as an effective absorber of electromagnetic (EM) waves, its practical application is hindered by impedance mismatch and single loss mechanism. Herein, we developed a one-step method for creating NaCl template precursors assembled with ZIF-67 to produce porous multiple components of Mo x C composites. The Mo x C-Co/C composites exhibit a minimum reflection loss ( RL min ) of −59.69 dB with a bandwidth of 3.12 GHz at a thickness of 1.50 mm. The RL min reaches −71.39 dB with a bandwidth of 4.08 GHz at a thickness of 2.09 mm. The flower-like Mo x C-Co/C composites are capable of improving impedance matching and offering multiple loss mechanisms such as interfacial polarization, dipolar polarization, conductive loss and magnetic loss, resulting in enhanced EM wave absorption. Thus, our work featured a simple strategy to provide a unique insight into fabricating high-performance EM wave absorbers on molybdenum carbon basis.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Peizhang Zhou,Jiang Cheng,Yuanyang Yan,Shouping Xu,Cailong Zhou
Homogeneous hydrophobic ZIF-67 decorated copper mesh was prepared by ultrafast electrodeposition and subsequent hydrophobization with stearic acid or 1-dodecanethiol. The preparation can be completed within 9 min under room temperature. Based on the hard-soft-acid-base (HSAB) theory, there exists difference of the interaction between Co 2+ and specific groups (carboxy or sulfhydryl), the oil/water separation and dyes adsorption performances were thus affected after ZIF-67-coated copper mesh was hydrophobized. The separation efficiency of the hydrophobic meshes for various oil/water mixtures was all greater than 98%, and remained almost no decline after several cycles of separation. However, the intrusion pressure of ZIF-67/copper mesh modified by 1-dodecanethiol is higher than the one modified by stearic acid. At the same time, the 1-dodecanethiol modified ZIF-67/copper mesh displayed a high adsorption capacity for Congo red (near 2000 mg/m 2 ), while the adsorption rate of the mesh modified by stearic acid is significantly faster. This work proposed a simple and fast method to build continuous, homogeneous MOFs film for oil/water separation and dyes adsorption.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 5
·1741-1749
·
IF 2.8
Xiong Qiming,Li Xiongzhuang,Zhou Mulan,Chen Rentian,Sun Cheng,Zhou Yanyan,Wang Sijia,Qiu Xiangyun,Song Meijia,Wei Tao
Nickel cobalt layered double hydroxide (NiCo-LDH) nanosheets have attracted much interests in lithium-ion batteries (LIBs) because of its high capacity and low cost. However, the low cycling stability limits their practical applications. Herein, we introduce a simple one-pot hydrothermal method to fabricate a novel flower-shaped Zif-67@NiCo-LDH heterostructure as the anode materials. The structures, morphology, and compositions of the materials were studied by XRD, SEM, TEM, XPS, EDX, and Raman spectra. Electrochemical tests were also conducted. The Zif-67@NiCo-LDH simultaneously inherited the cycling stability of Zif-67 and the high capacity of NiCo-LDH, which effectively improves the conductivity and structural integrity under the synergistic effect of the flower-shaped heterostructures and compositions and showed a good electrochemical performance. This work might enable the future design of heterostructures materials with layered double hydroxide for many other energy-storage technologies.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yan Shang,Jing Xu,Yue Ma,Zezhong Li,Qian Li
Photocatalytic hydrogen production was a potential strategy to solve energy shortage and environmental pollution. One of the valuable research directions for improving photocatalytic efficiency was to prepare catalysts in an efficient and low-cost way. Lamellar Sm 2 WO 6 and dodecahedron Zeolitic Imidazolate Framework-67 (ZIF-67) have been prepared successfully based on morphology control. Sm 2 WO 6 /ZIF-67 was prepared by a novel in situ growth scheme, which was confirmed by crystal structure, morphology and elemental composition analysis . The close interaction between Sm 2 WO 6 and ZIF-67 was confirmed by photoelectrochemical measurements. Based on the design of band structure , the S-type heterojunction was constructed. The research results of this paper provided a reference for exploring non-noble metal composite materials and demonstrated great potential in photocatalytic.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Siqi Hou,Wei Ding,Shuang Liu,Huaili Zheng,Jun Zhai,Liuwei Yang,Zheng Zhong
Elimination of As(III) from water has gotten more attention in comparison with As(V) due to its higher mobility and toxicity. In this work, we provide an effective method by integrating a cobalt-based metal–organic framework ZIF-67 and sulfite (S(IV)) to purify As(III)-laden water. The coupled oxidation with adsorption process (i.e., As(III) removal by ZIF-67/S(IV)) surpasses a divided preoxidation-adsorption process (i.e., As(V) removal by ZIF-67) for arsenic removal from the multi-component water containing various coexisting anions. Herein, the mechanism investigation corroborated that the S(IV) plays dual roles as a complexing ligand and a precursor of oxysulfur radicals. The enhanced As(III) removal is attributed to the S(IV) activation on the ZIF-67 surface via various reactions (e.g., surface complexation and intramolecular electron transfer), which not only generates SO 4 − radicals for rapid oxidation of As(III) to As(V), but also provides more adsorption sites for the immobilization of the oxidized product (As(V)). Furthermore, the combined process can rapidly treat arsenic in the realistic contaminated water from 242 to 7 μg L −1 within 15 min, directly meeting the provisional maximum contaminant level (<10 μg L −1 ). Overall, the proposed work may aid the rational design of S(IV) mediated oxidation-adsorption process to remove arsenic from a variety of contaminated waters.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Shuaishuai Ding,Chunhua Zhang,Yefei Liu,Hong Jiang,Rizhi Chen
Highly efficient Pd@CN catalysts for selective hydrogenation of phenol to cyclohexanone in water were successfully fabricated by loading Pd nanoparticles (NPs) in N-doped carbons (CN) derived from ZIF-67 with dicyandiamide (DICY) as the additional nitrogen source. For comparison, polyvinylpyrrolidone (PVP) was also used as the additional nitrogen source during the ZIF-67 synthesis. The results showed that the PVP and DICY had significantly different impacts on the microstructures of as-obtained CN materials and the catalytic performance of Pd@CN catalysts in the phenol hydrogenation. The addition of DICY had the positive promotion effect on the surface area of the obtained CN materials. Moreover, the introduction of DICY could increase the nitrogen content of CN and then prevent the re-oxidation of Pd NPs during air contact, resulting in higher Pd 0 ratio. In comparison with PVP, the DICY was more suitable as the additional nitrogen source for the formation of CN and Pd@CN (Pd@CN D , Pd@CN P ). The Pd@CN D exhibited superior catalytic activity as compared to Pd@CN P (phenol conversion 96.9% vs. 67.4%). More importantly, the as-prepared Pd@CN D catalyst could be reused for four times without catalytic performance reduction. The work would aid the development of Pd@CN catalysts with superior catalytic properties.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Dongyin Li,Fuchao Yang,Xuan Shi,Guangyi Tian,Changhui Fu,Yifan Liu,Zhiguang Guo
In recent years, oil pollution and industrial organic pollutants discharge has become a major problem affecting the ecological and human living environment, and the removal of oil in oily wastewater is increasingly urgent, especially for emulsion separation. Therefore, it is crucial to develop efficient oil–water separation membranes with low cost, green sustainability, and ease of operation. Herein, an ingenious spraying hybrid coatings containing ZIF-67 (Zeolitic Imidazolate Framework-67) and polypyrrole (PPy) onto stainless steel mesh (SSM) and polyvinylidene fluoride (PVDF) was proposed. Through solidification and cooperative self-assembly to build rough structures, oil–water separation membranes ZIF-67@PPy SSM and ZIF-67@PPy PVDF have been obtained, which are hydrophilic and oleophilic in air and superoleophobic underwater. Depending on the scenario, on-demand separation of light oil/water mixtures and oil-in-water emulsions can be easily realized. The resulting oil–water separation membranes performed well that the separation efficiency of ZIF-67@PPy SSM can exceed 99.3% for all kinds of light oil/water mixtures, with a water flux of up to 66250 L/(m2·h), and maintains a separation efficiency of 98.5% even after 50 cycles. ZIF-67@PPy PVDF has a separation efficiency of more than 99.4% for various oil-in-water emulsions, and sustains outstanding performance despite undergoing 10 cycles. In addition, ZIF-67@PPy SSM and ZIF-67@PPy PVDF are sustainable in harsh environments, with good mechanical durability and some antimicrobial properties. The coatings prepared in this work that can be used for the separation of light oil/water mixtures and oil-in-water emulsions, and the proposed combination of multiple separation strategies are expected to improve the selectivity, improve efficiency, enhance contamination resistance, and increase accessibility of oil–water separation technologies.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 56
·期 5
·055302
·
IF 3.4
Yangtao Yuan,Lei Gao,Yuanyuan Luo,Jiajia Mi,Zhenyu Cao,Man Wang,Jianping Shi,Guotao Duan
Surface-enhanced Raman scattering technique has become a powerful tool for detecting trace targets in the field of food-safety. However, it is a challenge to regulate the hot spots of the detection substrate and its interaction with target molecules for the enhancement of SERS activity. Herein, we reported the high performance SERS substrate based on Ag@ZIF-67 nanocomposite with sugar-coated haws like structure. It was found that the coverage of ZIF-67 particles on the surface of Ag nanowires can adjust the SERS ability of detection substrate. Compared with pure Ag nanowires, functionalized Ag nanowires exhibit outstanding SERS activity with good stability and uniformity. The detection limit of crystal violet and thiram can be as low as 10−10 M and 10−8 M, respectively. After 35 d, the SERS activity remains basically unchanged. Furthermore, it also has excellent SERS response to 5 \times 10−5 M thiram residues on the surface of vegetables. Such high SERS activity can be attributed to the enrichment and screening molecular effect of porous ZIF-67 nanoparticles, and the surface plasmon resonance effect of Ag nanowires. This work provides a simple strategy for the on-site detection of pesticide residues in the actual applications.
研究领域:
分析化学
·
食品安全
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）