Small
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2024
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IF 13
Yongzhuo Yu,Wei Li,Yuxin Huang,Huixing Yang,Chaoyu Lv,Hui xiang Yan,Di Lin,Shichao Jiao,Linlin Hou,Zhiliang Wu
Inspired by energy conversion and waste reuse, hybridized Ni-MOF derivative-CdS-DETA/g-C 3 N 5 , a type-II heterojunction photocatalyst, is synthesized by a hydrothermal method for simultaneous and highly efficient photocatalytic degradation and hydrogen evolution in dye wastewater. Without the addition of cocatalysts and sacrificial agents, the optimal MOF-CD(2)/CN5 (i.e. Ni-MOF derivative-CdS-DETA (20 wt.%)/g-C 3 N 5 ) exhibit good bifunctional catalytic activity, with a H 2 evolution rate of 2974.4 µmol g −1 h −1 during the degradation of rhodamine B (RhB), and a removal rate of 99.97% for RhB. In the process of H 2 -evolution-only, triethanolamine is used as a sacrificial agent, exhibiting a high H 2 evolution rate (19663.1 µmol g −1 h −1 ) in the absence of a cocatalyst, and outperforming most similar related materials (such as MOF/g-C 3 N 5 , MOF-CdS, CdS/g-C 3 N 5 ). With the help of type-II heterojunction, holes are scavenged for the oxidative degradation of RhB, and electrons are used in the decomposition of water for H 2 evolution during illumination. This work opens a new path for photocatalysts with dual functions of simultaneous efficient degradation and hydrogen evolution.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Lingyi Zhang,Jiachun Wu,Hongyun Xu,Huixia Li,Xiang Liu,Yanhua Song,Yanjuan Cui
The fabrication of non-metallic semiconductor heterojunction with superior redox capability for hydrogen (H 2 ) evolution from water and environmental remediation has been emerging as a prospective strategy. Herein, a novel two-dimensional (2D) g-C 3 N 4 /Ni-MOF Z-scheme heterojunction was prepared by a facile sonication-gel self-assembly method with g-C 3 N 4 and nickel metal-organic framework (Ni-MOF) nanosheets . The ultra-thin nanosheet structure of Ni-MOF was conducive to the formation of stable 2D heterojunctions. The opposite surface charge and matched band difference caused the charge flow from g-C 3 N 4 to Ni-MOF, resulting in an interfacial built-in electric field. The optimized NMF/CN-9 attained the optimal 3aphotocatalytic activity towards the degradation of tetracycline (TC) and H 2 evolution from water. Under visible light irradiation , the reaction rate for TC degradation (0.00497 min −1 ) and H 2 evolution (15.6 μmol·h −1 ) over NMF/CN-9 was nearly 2.4 and 2.1 folds higher than that of g-C 3 N 4 , respectively. Besides, the photocatalytic performance of NMF/CN-9 was also nearly 2 times higher than that of g-C 3 N 4 under simulated solar illumination. Such improvements were originated from higher photo-excited charge separation and superior redox ability derived from Z-scheme interfacial charge transfer. A possible photocatalytic mechanism was also proposed and the results indicated that efficient photo-induced electrons and reactive hole (h + ), superoxide radical (·O 2 - ) and hydroxyl radical (·OH) played a major role during the photocatalytic route. This work offers an intense insight into the construction of non-metallic semiconductor 2D heterojunctions for H 2 evolution and environmental wastewater treatment .
研究领域:
环境科学
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材料科学
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化学
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纳米技术
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催化
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Wenbo Li,Difei Xiao,Xueqin Gong,Xianbin Xu,Fahao Ma,Zeyan Wang,Peng Wang,Yuanyuan Liu,Ying Dai,Zhaoke Zheng,Yuchen Fan,Baibiao Huang
Electrocatalytic polyethylene terephthalate (PET) waste upgrading is crucial for developing a circular plastics economy and solving the energy crisis, but achieving efficient PET upgrading at an industrial-scale current density remains a formidable challenge. In our work, Ni-MOF@MnCo-OH catalyst was prepared by designing hierarchical heterostructure and incorporating the concept of multi-metal sites, wherein the Ni-MOF can be derived from PET plastic. Benefiting from the advantages of material design, the catalyst demonstrates excellent adsorption capabilities for both OH ad and ethylene glycol (EG), while also enhancing the electron transfer capability of Ni-MOF. We achieve a high Faradaic efficiency (∼80 %) during PET plastic upgrading at industrial-scale current density (300 mA·cm −2 at 1.43 V vs. RHE) with Ni-MOF@MnCo-OH. Moreover, through theoretical calculations and in situ Fourier transform infrared (FTIR) spectroscopy, we have further elucidated the mechanism of ethylene glycol oxidation reaction (EGOR). Notably, glycolic acid has been identified as a vital intermediate during the electrical oxidation of EG. This work provides a viable and eco-friendly approach to enhance the value of PET waste through sustainable means.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
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2018
·Vol. 6
·期 16
·2426-2431
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IF 4.776
Zhen Wang,Pei Dong,Zhongxiong Sun,Ce Sun,Huaiyu Bu,Jing Han,Sanping Chen,Gang Xie
Here we report a general approach for synthesizing size/morphology-controlled NH2-Ni-MOFs by optimizing the solvent composition in the reaction system, and their correlating catalytic performances are clearly explored for the first time. Interestingly, the electrocatalytic performance was found to increase 2.7 fold when the particle size is reduced from 1.5 μm for NH2-Ni-MOF(a) to 300 nm for NH2-Ni-MOF(c). Subsequently, this work exhibits an example of a high-performance NH2-Ni-MOF(c) electrocatalyst for application in constructing an electrochemical aptasensor to achieve sensitive C-reactive protein (CRP) detection based on an aptamer binding induced DNA walker–antibody sandwich assay. The proposed aptasensor shows a wide linear range from 0.1 pg mL−1 to 100 ng mL−1 with a low detection limit of 0.029 pg mL−1. The work presented here can thus offer an atypical approach to size- and morphology-controlled MOFs in electrocatalysis and biosensing.
研究领域:
电化学
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生物传感
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2021
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IF 6.498
Shengnan Li,Xuya Zhu,Hang Yu,Xizi Wang,Xiaqing Liu,Hui Yang,Fengxiang Li,Qixing Zhou
Antibiotic wastewater presents serious challenges in water treatment . Metal-organic frameworks (MOFs) have received significant attention as promising precursors and sacrificial templates in the preparation of porous carbon-supported catalysts. Herein, we investigated the sulfamethoxazole (SMX) degradation and electrochemical performance of microbial fuel cells (MFCs) that applied as-prepared Ni-MOF-74 and Ni–N–C (Ni-MOF-74 underwent pyrolysis treatment at different temperatures) as air-cathode catalyst. Firstly, the electrocatalytic activity towards oxygen reduction reaction (ORR) of the catalyst was investigated by rotating disk electrode. The results showed that electron transfer number for Ni-MOF-74 was 2.12, while that of 800Ni–N–C was 3.44, which was close to four-electron reduction. Applying Ni-MOF-74 in MFCs, a maximum power density of 446 mW/m 2 was obtained, which was close to that of 800Ni–N–C. Besides, using Ni-MOF-74 as cathode catalyst, a chemical oxygen demand removal rate of about 84% was obtained, and the degradation rate of 10 mg/L SMX was 61%. The degradation rate decreased with increasing antibiotic concentration, but the average degradation efficiency increased stepwise. Additionally, the relative abundance of resistant gene sul1 in the reactors of the new catalytic material was about 62% lower than that of sul1 in the control (Pt/C) reactors, and the relative abundance of sul2 was about 73% lower. Moreover, cost assessments related to the catalyst performance are presented. The findings of this study demonstrated that Ni-MOF-74 could be considered as a two-electron transfer ORR catalyst, and offers a promising technique for preparation of Ni–N–C for use as four-electron transfer ORR catalysts. In comparison, Ni-MOF-74 could be a promising ORR catalyst of MFCs for antibiotic degradation.
研究领域:
环境工程
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生物化学
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催化
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水处理
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Chao Chen,Jiayue Ren,Pengcheng Zhao,Jin Zhang,Yongjun Hu,Junjie Fei
Dopamine (DA) is an important neurotransmitter in human’s brain, which has direct connection to diseases like Parkinson’s disease, schizophrenia, etc. Therefore, the sensitive and rapid quantitative detection of DA is essential for medical diagnosis and disease prevention. To construct a novel electrochemical sensor for DA detection, nickel-based metal–organic frameworks (Ni–MOF) were synthesized through a hydrothermal method and combined with β-cyclodextrin. Under optimal experimental conditions, the sensor exhibited a wide linear detection range (0.7–310.2 μM) and a low detection limit (0.227 μM). Furthermore, the sensor exhibited satisfactory stability and accuracy in an electrochemical study involving human serum and dopamine hydrochloride injection samples containing DA, and the redox mechanism of the sensor was elucidated. Overall, this study presents a novel electrochemical sensor based on cyclodextrins and MOFs for DA detection.
研究领域:
分析化学
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神经科学
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电化学
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生物传感器
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2018
·Vol. 6
·期 19
·9228-9235
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IF 9.931
Teng Wang,Rumei Jin,Xiuqi Wu,Jie Zheng,Xingguo Li,Kostya Ostrikov
A highly efficient Ni–Mo bimetallic catalyst for the hydrogen evolution reaction can be obtained from a molybdate incorporated Ni-MOF by thermal decomposition in NH3. The catalyst is composed of crystalline Ni nanoparticles doped with amorphous low valence Mo oxide encapsulated in thin N-doped carbon layers, showing excellent HER performance, featuring a very low overpotential for the HER (η20 = 58 mV), low Tafel slope (57 mV dec−1) and excellent long term stability. The catalyst apparently outperforms N-doped carbon encapsulated Ni catalysts without Mo doping, emphasizing the critical synergetic effect of Mo doping and the surface N-doped carbon thin layer on promoting the performance of Ni based HER catalysts.
研究领域:
材料科学
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催化
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电化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2023
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IF 8.8
Shuang Han,Ruonan Sun,Le Zhao,Chen Yan,Hongtao Chu
Olaquindox (OLA) in food from its illegal use possesses great harmful effects on humans, making it important to develop sensitive, inexpensive, and convenient methods for OLA detection. This study innovatively presented a molecularly imprinted electrochemical sensor based on the synergistic effects of nitrogen-doped graphene quantum dots ( N -GQDs) and a nickel-based metal–organic framework functionalized with silver nanoparticles (Ag/Ni-MOF) for OLA detection. N -GQDs and Ag/Ni-MOF with unique honeycomb structures were sequentially modified on the glassy carbon electrode (GCE) surface to accelerate the electron transfer rate and increase the available region of the electrode. Molecularly imprinted polymers were further grown on the Ag/Ni-MOF/ N -GQDs/GCE by electropolymerization to significantly enhance the selective recognition of OLA. The constructed sensor showed excellent performance for selective OLA determination, with a wide linear range (5–600 nmol·L -1 ) and exceedingly low detection limit (2.2 nmol·L -1 ). The sensor was successfully applied to detect OLA in animal-origin food with satisfactory recoveries (96.22–101.02%).
研究领域:
分析化学
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电化学
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食品安全
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纳米技术
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2023
·Vol. 52
·期 36
·12763-12778
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IF 4
Qi Wen,Di Li,Chunyan Gao,Yuhang Xue,Lei Wu,Fang Song,Jun Zhou
In this paper, ultra-thin nanofiber PDI was obtained by self-assembly dispersion of commercial PDINH. A novel Co/Ni-MOF-74@PDI Z-scheme heterojunction photocatalyst material was constructed by a simple solvothermal method. XRD, SEM, TEM, FT-IR and other characterization techniques proved the successful preparation of the Co/Ni-MOF-74@PDI Z-scheme heterojunction photocatalyst material. By degrading chlortetracycline hydrochloride, it was found that the photocatalytic activity of Co/Ni-MOF-74@PDI was much higher than that of pure Co/Ni-MOF-74 and PDI. Subsequently, Co/Ni-MOF-74@PDI was used to activate H2O2 to further improve the degradation efficiency of chlortetracycline hydrochloride. It was found that the photocatalytic performance was greatly improved after the addition of 19.6 mM H2O2 to the system, and the degradation rate of chlortetracycline hydrochloride was 87% within 90 min. The electron transfer pathway and H2O2 activation mechanism of the Co/Ni-MOF-74@PDI composite photocatalyst were proved by free radical quenching experiments, electron paramagnetic resonance analysis and X-ray electron spectroscopy. Finally, the easy exfoliation point and degradation pathway of chlortetracycline hydrochloride were studied using density functional theory, UPLC-MS and toxicity evaluation software. It was found that the main active substances were h+, ˙O2, 1O2 and ˙OH, and the toxicity of chlortetracycline hydrochloride and its intermediates was evaluated.
研究领域:
材料科学
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环境科学
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光化学
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催化
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Yongfu Kang,Junwen Cai,Linfeng Zhang,Hong-Wei Wang,Rui-Bo Jin,Yoann de Rancourt de Mimérand,Xiaoyun Jin,Jia Guo
Herein, we explore the potential of innovative manufacturing techniques based on green chemistry principles, for the fabrication of convenient, performant, and stable supported photocatalysts to be used for water depollution. After giving some insight into the use of fractal geometry for the fabrication of tunable polymer supports for photocatalysts, we investigated the use of liquid crystal display (LCD) 3D printing to generate the fractal resin substrates to be used for the immobilization of semiconductor photocatalysts. Notably, confocal laser imaging was used as a first attempt for assessing the surface area of the fractal substrate. Immobilization methods based on cold plasma discharge (CPD) were employed to modify the surface of the polymer substrates and permanently anchor three different phases, namely, nickel-based metal–organic framework (Ni-MOF), BiOI, and AgVO3, in a hierarchical configuration. Herein, for the first time, we developed a plasma-initiated condensed in situ complexation-assisted precipitation (c-ISCAP) method that allowed 2D Ni-MOF to be synthesized directly onto the surface of a polymer substrate, in a single step. Not only this MOF coating was found to be strongly bound to the surface of the polymer substrate but also very uniform and fully functional, even when other inorganic phases were immobilized on the top of this layer. This chemical approach opens the way for the fabrication of hybrid materials with complex polymer substrates and MOF coatings that could be used in a range of possible applications, for instance as chemical sensors, electrodes, adsorbents, optical devices, etc. Our hybrid photocatalysts were tested via photodegradation of Rhodamine B (RhB) dye upon visible light activation, with recycling runs to assess their durability. It was found that the hierarchical heterojunction Ni-MOF/BiOI/AgVO3 showed an outstanding ability for the removal of RhB dye, owing to the activity of the Ni-MOF layer in terms of charge transfer, and also partly because of its adsorbing potential. The three photoactive phases demonstrated a strong synergistic effect through coupling. However, more importantly, our findings show that their immobilization itself, regardless of the method used, significantly modified their optoelectronic properties, hence most likely changing the overall mechanism of charge transfer in the heterojunction. The Ni-MOF phase, notably, was found to display a reduced bandgap when obtained by c-ISCAP, which contributed to enhance its activation by visible light irradiation. Finally, it was established that the fractal geometry had a significant impact on the efficiency of the supported catalysts, probably thanks to an increased immobilization ratio of photocatalyst mostly, owing to the larger surface area available.
研究领域:
材料科学
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环境工程
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化学工程
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纳米技术
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绿色化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Zhiliang Jin,Haiming Gong,Hongying Li
The morphology modification and the construction of heterojunction of the photocatalyst are considered as the main means to significantly improve the performance of photocatalytic hydrogen evolution. In this study, Mn 0.2 Cd 0.8 S nanorods are successfully assembled on the surface of Ni-MOF-74 with flake morphology. Specifically, the Ni-S bond is constructed between Ni-MOF-74 and Mn 0.2 Cd 0.8 S, which provides a unique transfer channel for photo-induced carriers. Meanwhile, the electrons in the conduction band of Mn 0.2 Cd 0.8 S can be injected into the conduction band of Ni-MOF-74 quickly due to the potential energy difference between the two. This shows that the recombination of photogenerated carriers in Mn 0.2 Cd 0.8 S can be greatly inhibited. Fluorescence spectroscopy and electrochemical characterization reveal that the composite catalyst has the longest carrier lifetime, the fastest charge transfer rate and the lowest overpotential compared with the Mn 0.2 Cd 0.8 S and Ni-MOF-74. The optimal hydrogen production rate of the composite can reach 7.104 mmol g −1 h −1 , which is 6.96 times that of Mn 0.2 Cd 0.8 S. This work provides a novel strategy for the modification of MnCdS-based photocatalysts by metal–organic framework materials.
研究领域:
材料科学
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能源化学
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催化科学
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产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Ningkuan Zhong,Weiyi Wu,Fen Xu,Lixian Sun,Yi Wu,Jianhao Lao,Xiaohui Qin,Yu Wang,Xiangpeng Ding,Aicheng Peng,Jincheng Liu,Dingding Yuan
In this work, a flower-like porous Ni-MOF BDC @C (MOFs@C SP ) has been synthesized successfully on carbon material through two surfactants (SDS and PVP) control by means of a facile solvothermal method. SEM results reveal that the MOFs@C SP is the porous material that bends and folds into the flower shape of Ni-MOF nano sheets orientated grown on the carbon materials. The results also illustrate that the carbon material plays the role of template and conductive reinforcing agent. Under the action of carbon and double surfactants, the MOFs@C SP has the highest specific capacity and the lowest resistance of charge transfer in the four Ni-MOF BDC materials (namely MOFs@C SP , MOFs@C P , MOFs@C S and Ni-MOF BDC ). That is the specific capacity of MOFs@C SP is 1350.1 F g -1 at 1 A g -1 , corresponding to resistance of charge transfer of 0.3 Ω. Moreover, the energy density of the asymmetric device assembled by MOFs@C SP is 42.9 Wh kg -1 under 813.1 W kg -1 .
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
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