MATERIALS RESEARCH BULLETIN
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2022
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IF 5.6
Yi Zhou,Jiaxin Li,Jin Zhang,Yongbo Chen,Tiantian Yao,Anna Chen,Minghui Xiang,Zhiyue Chen,Zhibin Wu
Dye sensitization is a pivotal method for the improvement of light utilization and electron transfer. Herein, a rhodamine B (RhB)-sensitized type Ⅱ DUT-5/BiVO 4 heterojunction was successfully synthesized. The results showed that the RhB sensitization process of DUT-5/BiVO 4 heterojunction merely affected the DUT-5 instead of BiVO 4 . SEM results showed that the regular DUT-5 nanoparticles were homogeneously dispersed on the surface of leaf-shaped BiVO 4 nanosheets. The as-fabricated samples were employed to degrade RhB and tetracycline (TC) under 300 W Xe lamp (λ ≧ 420 nm) irradiation. The RhB sensitized heterojunction showed considerably strengthened photocatalytic performance. The photodegradation efficiency of RhB sensitized BD-15% can achieve 82% for RhB after 60 min visible-light irradiation, and 71% for TC after 30 min visible-light irradiation. The dye-sensitized composites exhibit excellent photocatalytic activity ascribed to its boosted photoinduced electron transport, broadened visible-light response range and larger specific surface area. Moreover, a possible mechanism for pollutants photodegradation over RhB sensitized DUT-5/BiVO 4 was proposed.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
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2020
·Vol. 22
·期 8
·2000267
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IF 3.217
Hao Zou,Yi Zhou,Ye Xiang,Yuehong Deng,Yawen Tan,Haiqin Tang,Yifeng Xu
The formation of heterojunctions is an effective method to develop visible light-driven photocatalytic materials. A flower-like DUT-5@BiOBr composite is prepared by the hydrothermal method. The presence of a large number of heterojunctions in the 2D–2D interface accelerates the separation of photogenerated charges. When the mass ratio is 20%, the composite material shows the highest visible light catalysis and excellent stability in cycling experiments. The photocatalytic mechanism is analyzed by various characterization methods. The results show that the main active species in the photocatalytic process are superoxide radicals and holes and prove that the heterojunction that forms between DUT-5 and BiOBr is a type-II heterojunction. The synergy between the increase in specific surface area, the unique mesoporous structure, and the heterojunction promotes the speed of photocatalysis. Herein, new ideas are provided for the development of 2D–2D composite materials to degrade organic pollutants under visible light to solve environmental pollution.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 22
·26905-26916
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IF 2.478
Yao Tiantian,Zou Hao,Zhang Jin,Zhou Yi
Constructing a heterojunction to extend the survival time of photogenerated carriers is an effective way to increase the photocatalytic performance of materials. The 2D-2D flower-like DUT-5@Bi 2 WO 6 composite material is obtained via the hydrothermal method for the frist time. The efficiency of Rhodamine B removal based on 30% DUT-5@Bi 2 WO 6 is 87% under visible light for 18 min, which is 4.55 times that of pure Bi 2 WO 6 . RhB-sensitized effect plays a decisive role in enhancing the photocatalytic activity of DUT-5 to RhB under visible light. The results shows that the type I heterojunction is formed between RhB/DUT-5 and Bi 2 WO 6 . The wide contact surface stems from heterojunction can accelerate the separation and transfer of photo-generated charges. Furthermore, the high specific surface area and unique pore structure of DUT-5 provide sufficient active sites for photocatalytic reactions. Thus, the efficient charge transfer and sufficient active sites contribute to the photocatalytic activity. This work provides a new idea for the development of 2D-2D composite materials to degrade organic pollutants under visible light to solve environmental pollution.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 47
·期 5
·2248-2256
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IF 3.925
Defeng Hu,Rongzhong Li,Yide Han,Hao Meng,Xia Zhang
Currently, the co-immobilization of multi-enzymes on a solid carrier and their applications in cascade catalytic reactions are primarily studied. In this study, a MOF/polymer porous membrane composed of DUT-5 incorporated polyvinylidene fluoride (PVDF) is constructed and employed in the co-immobilization of porcine pancreatic lipase (PPL) and glucose oxidase (GOx) for the first time. The loading amounts of DUT-5 nanoparticles were varied to optimize the subsequent immobilization efficiency for the two enzymes. The adsorption conditions, isotherms and kinetics for both PPL and GOx were investigated systematically, and the optimum adsorption conditions were determined and used in the co-immobilization of the two enzymes step by step. It is interesting that the maximum adsorption amounts for the two enzymes in the co-immobilization process are similar to the results obtained in the single enzyme immobilization, which indicates the better compatibility of PPL and GOx in the hybrid membranes. The catalytic activities of the co-immobilized enzymes were evaluated using a cascade oxidation reaction, in which H2O2 produced in the GOx-catalyzed oxidation of glucose worked as the oxidant in the subsequent oxidation of styrene. Further, the catalytic efficiency of the co-immobilized enzymes is compared to that of the mixed free PPL and GOx. The improved catalytic rates and better reusability of the co-immobilized enzymes highlight the broader applications of MOF-based membranes in the co-immobilization of two or more enzymes and the catalytic applicabality in the cascade organic reactions.
研究领域:
生物化学
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材料科学
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酶工程
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DOI
高影响因子
CATALYSIS LETTERS
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2022
·Vol. 153
·期 6
·1743-1755
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IF 2.936
Zhou Yi,Yao Tiantian,Tan Yawen,Chen Yongbo,Chen Zhiyue,Zhang Jin
In this study, a novel composite DUT-5/Bi 2 MoO 6 (DUT-5/BMO) photocatalytic material was prepared by two-step hydrothermal method for the first time. The materials were characterized by SEM, XPS, etc. Studies have shown that material with a new n–n heterojunction structure can quickly degrade tetracycline. DUT-5 was embedded between the Bi 2 MoO 6 nanosheets, which promotes the photogenerated electrons from DUT-5 flows to Bi 2 MoO 6 , thereby reducing the recombination rate of photo-generated electron–hole pairs. The BET results show that the composite material has a larger specific surface area than the monomer Bi 2 MoO 6 . It can provide more active sites. After 60 min of visible light irradiation, the photocatalytic degradation efficiency of TC with 15% DUT-5/BMO reached 84.22%, which is 5.37 and 2.12 times higher than that of pure DUT-5 and Bi 2 MoO 6 , ·O 2 − and h + were the main active substances in the photocatalysis process. In addition, DUT-5/BMO composites show excellent stability and recyclability in 5 times cyclic experiments. In conclusion, DUT-5/BMO has good stability in the environment, and can be used for environmental remediation without pollution. Graphical
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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纳米技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Pan Ma,Meili Ding,Ying Zhang,Wei Rong,Jianfeng Yao
The heterogeneous catalytic conversion of carbon dioxide (CO 2 ) conversion is an appealing yet highly challenging task. Introducing target-specific active sites into solid catalysts provides an alternative but promising way for boosting the chemical fixation of CO 2 . Here, we designed a lanthanide (III) complex with 1-vinyl imidazole (Vim) and immobilized it with DUT-5 by a combination of coordination and in situ polymerization. The resultant La-Vim/DUT-5 with high porosity and multiple active sites achieves a catalytic yield of 94% for CO 2 cycloaddition of epichlorohydrin, much superior to that of each component. More importantly, such catalytic activities can be well maintained using simulated flue gas as C1 source under both dry and humid conditions. This work opens up a novel and general avenue to tailor the chemical functionality of MOFs for capturing and converting CO 2 under actual conditions.
研究领域:
催化
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材料科学
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环境化学
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化学工程
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DOI
高影响因子
Molecular Catalysis
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2026
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IF 4.3
Shukang Ti,Dongmei Yue
Pd/DUT-5 is an efficient catalyst for NBR hydrogenation to HNBR. • High hydrogenation activity was achieved under mild conditions. • Metal-support interactions stabilize electron-enriched Pd δ+ species. • Pd δ+ species enhance catalytic activity and chemoselectivity. • DFT reveals low-barrier heterolytic H 2 activation at Pd δ+ –μ 2 O - sites. Hydrogenated nitrile butadiene rubber (HNBR), produced via the selective hydrogenation of nitrile butadiene rubber (NBR), has attracted considerable interest because of its excellent overall performance. However, the development of efficient and selective catalytic systems for NBR hydrogenation under mild conditions remains challenging, particularly when both activity and cost-effectiveness are required. Herein, Pd nanoparticles were immobilized on the Al-based metal-organic framework DUT-5, and the influences of Pd precursor salts and pretreatment conditions on catalytic hydrogenation performance were systematically investigated. The results show that using Pd(OAc) 2 as the precursor in combination with relatively low reduction temperatures promotes the formation and stabilization of electron-enriched Pd δ+ species through metal-support interactions, leading to excellent low-temperature activity and good reusability, with the hydrogenation degree remaining 94.5% after three cycles. Density functional theory calculations using C 2 H 4 as a model substrate further reveal that Pd δ+ sites cooperatively interact with μ 2 O - moieties to facilitate H 2 activation and subsequent hydrogen transfer through a heterolytic cleavage pathway with reduced energy barriers. These results provide a mechanistic basis for the efficient hydrogenation of NBR under mild conditions. Overall, this work demonstrates an effective and economical strategy for HNBR production and offers new insights into the design of highly active and chemoselective catalysts for NBR hydrogenation. Download: Download high-res image (205KB) Download: Download full-size image
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yilei Fang,Mengyu Tang,Xu Wu,Jiajie Zhang,Qian Guan,Yinzhou Luo,Xin Yu,Ranwen Ou
Trace amount of Cr(VI) in water still threatens human health and ecology. Several reported amine-based adsorbents can remove trace Cr(VI) in acidic solutions of pH 2–5, but perform badly at neutral and alkaline conditions, which is insufficient for treating natural waters. Also, the chemical eluate leads to secondary pollution. Here, the amine-rich thermo-responsive poly(dimethylaminoethyl methacrylate) (pDMAEMA) was selected based on its high pK a value and introduced into MOFs to produce pDMAEMA-DUT-5 for effective removal of trace Cr(VI) from natural waters. The composite with a polymer loading of 23.4 wt% achieved the highest adsorption capacity of 182.2 mg g −1 under an optimized condition, that is, at pH 3 and 25 °C. Besides, this material effectively reduced trace Cr(VI) content in natural waters from 100 to 1 μg L −1 by one filtration in a column. Its high selectivity was verified and further confirmed by the strong adsorption energy of Cr(VI) and −N(CH 3 ) 2 . Furthermore, the composite could be fully regenerated in 45 °C water within 10 min, concentrating Cr(VI) for 270 folds in one adsorption–desorption cycle and maintaining over 99 % performance after five cycles. It demonstrated excellent removal efficiency, high selectivity, and thermal regeneration stability. This work presents a simple strategy to design highly selective and reusable ion adsorbents for effective and sustainable removal or recovery of toxic and precious ions, while its thermal regeneration function largely simplifies further treatments.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）