Journal of Material Cycles and Waste Management
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2024
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IF 2.7
Zhu Wenzhong,Zhu Xueting,Shen Weijian,An Nan,Wu Lina
Antibiotics are extensively employed in the treatment of human and animal ailments. However, their excessive use and poor biodegradability have led to a notable accumulation of antibiotics in the environment, presenting potential health hazards to humans. In this study, tetracycline (TC) was selected as a representative antibiotic, and a recyclable material, Mn-ZIF-67, was synthesized to degrade TC through adsorption and peroxidase-like activity. Mn-ZIF-67 significantly enhances the peroxidase-like activity of ZIF-67. The removal efficiency of TC was boosted by 300% compared to ZIF-67 within a 10-min timeframe. With its high catalytic activity and stability, Mn-ZIF-67 exhibits significant promise for the swift degradation and elimination of antibiotics from the environment.
研究领域:
环境科学
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材料科学
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生物化学
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 4
·2285-2294
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IF 3.591
Nannan Liu,Simin Shang,Dajun Shi,Qingrong Cheng,Zhiquan Pan
Thanks to the unique structure and properties of MOFs, a well-designed novel hollow ZnO/Mn-ZIF-67 composite photocatalyst was synthesized by a facile sonocrystallization approach successfully. The hollow ZnO/Mn-ZIF-67 composites exhibited higher photocatalytic activity in degrading Bismarck brown R than pure hollow ZnO spheres and Mn-ZIF-67. The optimal ZnO/Mn0.5-ZIF-67 showed the highest catalytic activity with 89.5% Bismarck brown R removal within 100 min. The improved photocatalytic activity of the composites could be mainly attributed to effective photogenerated charge separation and transfer through the coupled Z-scheme heterojunction between hollow ZnO spheres and Mn-ZIF-67. The composite photocatalyst exhibited obviously good stability and recyclability after recycling 4 times. Finally, a possible Z-scheme electron transfer mechanism was proposed based on the active radical trapping experiments and ESR which could explain the improved photocatalytic performance of the photocatalytic system. This work provides a promising approach to construct a direct Z-scheme heterojunction for the degradation of environmental pollutants.
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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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Bowen Dong,Yuqi Wan,Dan You,Qingrong Cheng,Zhiquan Pan
In order to alleviate the problem of water resource pollution, the exploration of visible-light driven excellent photocatalysts is an important issue for worldwide sustainable green energy systems. In this work, a novel binary hybrid nanocomposite WO 3 /Mn-ZIF-67 heterojunction photocatalyst was prepared through simple template method. It was based on the particular structure and performance of metal-organic framework (MOFs), and the structure of the heterojunction photocatalyst was expressed by SEM, TEM , FT-IR, DRS , XPS , PXRD and EIS . The novel WO 3 /Mn-ZIF-67 heterostructure showed more efficient photocatalytic properties for Tetracycline (TC) decomposition and hydrogen production than that of WO 3 monomer and Mn-ZIF-67 monomer under simulated light, respectively. Owing to the active radical catch and ESR experiments, a rational solid-state Z-model electron migration theory was rendered. Z-model mechanism can neatly be obligated to the raised degradative capacity of the photocatalytic reaction. The wonderful high-efficiency photocatalytic decomposability of heterojunction was mainly due to: (i) the WO 3 structure improved dramatically the light absorption efficiency of the photocatalyst. (ii) the doped Mn enhanced the photoelectric properties of ZIF-67. (iii) contact with the close interface between WO 3 and Mn-ZIF-67 produced efficient charge separation and migration.
研究领域:
环境科学
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材料科学
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光催化
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纳米技术
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高影响因子
ChemistrySelect
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2024
·Vol. 9
·期 35
·e202402650
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IF 1.9
Xinyi Wang,Zihan Cheng,Yuting Liu,Li Wang,Lili Chen
Graphical In the study, Mn-functionalized ZIF-67 (Mn@ZIF-67) hybrid material was synthesized using a post-synthesis modification method. Its oxidase-like catalytic activity effect enabled this material to directly oxidize colorless TMB into blue oxTMB without the presence of H 2 O 2 . This color change provided a means for the detection of Art and AA. The work also demonstrated the practical application of this method in analyzing real samples containing AA or Art. Artemisinin (Art) is the first-choice medicine for treating malaria. It also shows good therapeutic effects in antibacterial and antitumor treatment. Therefore, a simple and efficient method for detecting Art is of great significance. Mn-functionalized ZIF-67 (Mn@ZIF-67) hybrid materials were synthesized using a post-synthesis modification method. Due to the introduction of Mn 2+ , Mn@ZIF-67 possesses higher peroxidase/oxidase like dual-mimic enzymes activity than ZIF-67, which can catalyze Art and generate peroxyl radicals. Based on this fact, Mn@ZIF-67 was used to detect Art in the presence of TMB. A good linear relationship between absorption intensities at 652 nm and Art concentrations was obtained in the range of 0–22 μM with a detection limit of 200 nM. Ascorbic acid (AA), due to its reducibility, can inhibit peroxidase/oxidase mimetics activity of Mn@ZIF-67 and the blue Mn@ZIF-67-TMB solution fades gradually with the addition of AA. Mn@ZIF-67-TMB acting as a colorimetric sensor, AA can be sensitively detected ranging from 0–30 μM, and the detection limit is 50 nM. Coexisting substances don't interfere with the detection of Art or AA. This sensing platform provides a highly sensitive and selective colorimetric method for monitoring AA and Art in serum, thereby demonstrating remarkable practicality.
研究领域:
材料科学
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医学
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药物分析
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高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Jie Cao,Jingge Niu,Yizhuo Pang,Tianshu Luo,Jiayi Peng,Xiaohong Hou
Nitrite is a kind of frequently detected inorganic pollutants in water. In order to sensitively and conveniently monitor the nitrite anytime and anywhere, colorimetric sensing method-based nanoenzymes and portably immediate detection devices become urgent. Herein, we utilized L-arginine as a catalyst and a linker to mediate the synthesis of CeO 2 on bimetallic MOFs (CeO 2 @Mn/ZIF-67), with Co and Mn were set as the central metals. Its enzyme-activated performance ( K m : 0.054 mM and V max : 64.00 μMs −1 ) was superior to most reported materials. Nitrite can diazotize with oxTMB, causing a change in the ratio of absorbance at 652 nm to absorbance at 450 nm (A 652 /A 450 ). Thus, a rapid and sensitive platform for the colourimetric detection of nitrite was established. A portable glass tube hydrogel sensor was designed inspired by the principle of disposable alcohol swabs for the first time to achieve the nitrite monitoring. When the glass tube was cut to introduce TMB and nitrite into the nanoenzymes, a noticeable colour change occurred. Attributed to the high activity of the nanoenzymes and the clever design of the detection device, the proposed method overcame the shortcomings of the traditional sensing methods such as long detection time and poor portability.
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