OPTICAL MATERIALS
·
2021
·
IF 3.08
Xuyang Li,Zongxue Yu,Liangyan Shao,Xiaofang Feng,Haojie Zeng,Yuchuan Liu,Runxuan Long,Ximei Zhu
In order to effectively solve the two major problems of photocatalyst recovery and membrane fouling , this research combines photocatalyst and membrane separation technology . In this study, the NH 2 -MIL-88B(Fe)/CDs@GO material with good photocatalytic properties was synthesized by hydrothermal method and mechanical stirring, and the photocatalytic membrane was obtained by vacuum filtration. The results show that the NH 2 -MIL-88B(Fe)/CDs@GO membrane can effectively intercept and degrade methylene blue (MB). After 10 cycles, the rejection rate of MB can still reach 99.5%, which is about 2.5 times of pure GO membrane (40%). After 15 min of visible light irradiation, the Flux recovery rate (FRR) of NH 2 -MIL-88B(Fe)/CDs@GO membrane can reach 95%, and the antifouling performance is excellent. In this study, the composite photocatalytic membrane shows excellent stability, photocatalytic performance and self-cleaning property, which is conducive to widening the application prospect of wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Lingtao Liu,Lijian Wang,Jingxin Tan,Cong Yu,Junjie Bian,Xinbo Wang
Photocatalytic selective oxidation of furfural is a green, gentle way of preparing furoic acid. Photocatalytic oxidation effectively avoids the problems of difficult separation and high energy consumption in subsequent work-ups caused by the use of homogeneous oxidants. The photocatalytic process suffers from uncontrollable reactive oxygen species, resulting in low selectivity of the target product and excessive oxidation. Therefore, the K x -C 3 N 4 /UiO-66-NH 2 -Y catalyst was prepared by the mass proportion of UiO-66-NH 2 and K x -C 3 N 4 to form a heterogeneous structure, and the band gap width was adjusted to effectively avoid the formation of non-target strong reactive oxygen species ( OH). The results showed that: the aqueous 0.1 mM Na 2 CO 3 solution had an inhibitory effect on the non– target reactive oxygen species at room temperature; when the reaction time was 5 h and K 0.1 -C 3 N 4 /UiO-66-NH 2 -20, the furoic acid had the highest yield of 70.7, the target reactive oxygen species was confirmed by free radical capture experiments as O 2 – , and it was postulated that the reaction mechanism for the preparation of furoic acid by selective oxidation of furfural.
研究领域:
催化化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 37
·25465-25474
·
IF 10.7
Yalin Niu,Peng Jiang,Tianying Guo
Developing high-performance artificial enzyme materials with practical applications in efficient catalytic hydrolysis detoxification of organophosphate (OP) nerve agents remains a formidable challenge. Herein, UiO-66-NH2-stabilized Pickering high internal phase molecularly imprinted polymer systems (MOFs@PHIPMIPs) were developed using OPs as template molecules. Thus, UiO-66-NH2-doped high-internal-phase MIP composites were obtained, which integrate MIPs and MOFs successfully, showing remarkable catalytic hydrolysis activity towards OPs. In addition, by introducing methyl methacrylate (MMA) during copolymerization, the MOFs@PHIPMIPs would effectively acquire pH buffering properties. The multi-porous composite catalysis system exhibits an exceptionally high detoxification efficiency towards dimethyl-4-nitrophenyl phosphate (DMNP) in pure water (kobs = 0.9162 min−1, t1/2 = 0.76 min). This work presents a new strategy for the preparation of artificial phosphatase materials with high-performance catalytic detoxification of OPs with great application prospects.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Yuanya Zhang,Yu He,Wen Ma,Yanlin Zhu,Yuxiang Liu,Junya Yuan,Xuehu Men
Despite epoxy composites being used in a wide range of applications, it remains a great challenge to solve the defect of high brittleness and poor wear resistance for real engineering applications. Nanomaterials enhance fracture toughness and provide superior antifriction and wear resistance for epoxy matrix materials. In this work, a late-model ANFs/MXene/UiO-66-NH 2 hybrid aerogel (AMU) with 3D layered and “mortar-brick” multi-hole structure was devised via solution impregnation and hydrothermal in situ growth processes. MXene and UiO-66-NH 2 were uniformly anchored to the surface of the ANFs aerogel backbone due to hydrogen bonding forces and electrostatic adsorption. The acquired AMU-EP composites exhibited excellent thermal conductivity owing to an efficient three-dimensional network of thermal conductive pathways inside the epoxy matrix. Moreover, the efficient synergistic effect of AMU components formed a high-quality transfer film on the surface of steel balls during the friction process, which was important for enhancing the tribological properties of AMU-EP.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2020
·
IF 3.408
Yanan Dong,Tianding Hu,Manoj Pudukudy,Hongying Su,Lihong Jiang,Shaoyun Shan,Qingming Jia
In this paper, the effect of conventional solvothermal and a microwave-assisted method for the synthesis of MIL-101(Fe) and NH 2 -MIL-101(Fe) as adsorbents for the removal of tetracycline in wastewater is reported for the first time. The results had shown that the microwave treatment led to a significant reduction in the material synthesis time, which greatly saved the energy. It was also found that the microwave-assisted synthesized material exhibited small particle size, high specific surface area and better adsorption capacity. The introduction of amino group further enhanced the adsorption capacity of MIL-101(Fe). The adsorption capacity of MIL-101(Fe) and NH 2 -MIL-101(Fe) samples for tetracycline adsorption by microwave assisted synthesis method reached up to 332 mg/g and 378 mg/g, respectively. Moreover, the adsorption isotherm was well-fit with Freundlich model, indicating a multilayer adsorption . The kinetic studies indicated that the reaction followed pseudo second-order reaction kinetics with a best fit to the theoretical value. Due to the higher adsorption efficiency and lower energy consumption of the synthesis, the as-prepared microwave assisted materials could be used as potential adsorbents for different pollutants in wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Nano Research
·
2017
·Vol. 10
·期 10
·3543-3556
·
IF 7.354
Pi Yunhong,Li Xiyi,Xia Qibin,Wu Junliang,Li Zhong,Li Yingwei,Xiao Jing
Efficient separation and transfer of photogenerated electron/hole as well as enhanced visible light absorption play essential roles in photocatalytic reactions. To promote the photocatalytic reduction of Cr(VI), a toxic heavy metal ion, multiwalled carbon nanotube (MWCNT) was introduced as an electron acceptor into NH 2 -MIL-68(In). This led to the growth of a willow leaf-like metal-organic framework (MOF) on an MWCNT backbone forming MWCNT/NH 2 -MIL-68(In) (PL-1), which showed a highly efficient transfer of photogenerated carriers. Moreover, MWCNT incorporation introduced more mesopores for Cr(VI) diffusion and enhanced the visible light adsorption without lowering the conduction band position. As a result, the photocatalytic kinetic constant of PL-1 was found to be almost three times higher than that of the parent NH 2 -MIL-68(In). Thus, growing MOFs on MWCNTs provides a facile and promising solution for effective remediation of environmental pollution by utilizing solar energy. This work provides the first example of using MWCNT/MOF composites for photocatalytic reactions.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Xueyun Wei,Baorong Zhang,Zhuomin Zhang,Gongke Li
Haloacetic acid (HAA) disinfection by-products (DBPs) with high polarity, low concentration and significant health hazard are widely present during disinfection processes, particularly iodinated and brominated acetic acids. Due to the lack of selective enrichment media, current sample preparation methods are insufficient for efficient enrichment of low concentrations of HAA DBPs in complex samples, which usually influences the analytical sensitivity and accuracy. In this study, a modulator-induced defect formation strategy was employed to prepare defective UiO-66-NH 2 (D-UiO) as a selective enrichment medium which was further fabricated as membrane solid-phase extraction (M-SPE) to efficiently enrich HAA DBPs. The structure and enrichment performance of the D-UiO medium was studied in detail. D-UiO exhibited good extraction selectivity for the five target DBPs in the presence of structural analogs as interfering compounds. Then, a sensitive quantification method by D-UiO based M-SPE was developed for trace brominated and iodinated acetic acid DBPs in tea drinks coupled with ultra-performance liquid chromatography-tandem mass spectrometry. The limits of detection of the method were in the range of 5.0-15.0 ng/L, and the recoveries were in the range of 78.3%-124%. By combining a ten-pass syringe pump with M-SPE technology, this method enabled batch sample processing and significantly reduced pre-treatment time. The method developed was efficient, selective, sensitive, and accurate for the analysis of hazardous HAA DBPs in complex tea drinks.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Chengyan Wang,Yangsai Lyu,Jia Li,Li Li,Tingting Li,Jie Yang,Ningning Xing,Xiaolei Zhang
Excessive fluorine can cause a serious threat to human health. It is significant but challenging to develop a straightforward and rapid way to simultaneously detect and remove excess F– from water. Herein, we presented a three-dimensional (3D) hierarchical UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid synthesized by a facile biotemplate route for simultaneous detection and removal of F– from water. We elaborately assembled two kinds of materials in a bioinspired 3D hierarchical structure as a functional unit to achieve detection and removal of dual functions. The outer UiO-66-NH2 nanoparticles served as a fluorescent sensor to detect and capture F– via a strong fluorescence enhancement effect caused by the electron transfer from F– and γ-AlO(OH) and acted as the capture unit of F–. The inner γ-AlO(OH) nanowire layer served as a F– absorbent through ion exchange between F– and γ-AlO(OH). The resulting UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid displayed excellent selectivity and sensitivity for F– detection (the detection range was 0–5 mM and the limit of detection was as low as 0.77 μM) and high capacity for F– removal (the maximum equilibrium adsorption capacity qmax was as high as 87.0 mg g–1). This dual-function material provided a strategy for simultaneously selective sensing and efficient removal of anionic pollutants from water.
研究领域:
环境科学
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材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 7
·3177-3190
·
IF 3.5
Lu Xiaohui,Yu Shouwu,Gao Tian,Chen Yifu,Zhao Xiang,Xiao Shujuan
The wettability of the membrane surface is very important for the separation of oil-in-water emulsion. In this paper, the hydrophilic NH 2 -CAU-1 was added to the membrane surface by interfacial polymerization, which greatly improved the separation efficiency of oil-in-water emulsion. The effect of the amount of NH 2 -CAU-1 on the separation efficiency of TFN membrane was studied, and it was determined that TFN-1 membrane had ultra-high separation efficiency of oil-in-water emulsion (> 97.60%). TFN-1 membrane has a high underwater oil contact angle (higher than 139.53°), resulting in excellent oil adhesion resistance on the membrane surface. The universality and cycling performance of TFN-1 membrane were tested, and UWOCA had good stability under strong acid, strong base and different NaCl concentrations, and the separation efficiency did not change significantly after 8 cycles. The results show that TFN-1 membrane has excellent performance in separating oil-in-water emulsions and has broad application prospects in separating oil-in-water emulsions stabilized by surfactants. Graphical abstract
研究领域:
膜科学
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化学工程
·
材料科学
·
环境工程
·
分离技术
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Nan Zhao,Kangjie Zhang,Yuexiang Lu,Shuang Liu,Zhe Wang,Xiangke Wang
The photocatalytic method has been proven as one of the effective methods for uranium removal from radioactive wastewater. Herein, a photocatalyst UiO-66-NH 2 -Pt was prepared using the adsorption-photoinduction method. Pt was first adsorbed on the substrate and then photo-reduced under light irradiation to be doped into the structure of UiO-66-NH 2 . The characterization results implied the formation and atomic dispersion of Pt with a loading content of 1.90 wt%. The loading of Pt has promoted the effective separation and transfer of photogenerated electron-hole pairs, broadened the visible light adsorption range and narrowed down the bandgap, thus to enhance the photocatalytic activity. Then they were applied for the photo-removal of uranium under air atmosphere. The reaction rate of UiO-66-NH 2 -Pt was about 7 times that of pure UiO-66, confirming the higher photocatalytic activity after the loading of Pt. It showed good reusability and was also universal for different water matrix. The detection of hydroxyl radicals with EPR method indicated the formation of H 2 O 2 , which could react with uranyl ions to form metastudtite under air. This work further verified the feasibility of photoinduced synthesis of Pt single atom and provided a novel material for photocatalytic removal of uranyl ion under air.
研究领域:
环境科学
·
材料科学
·
核工程
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Yipeng Zhang,Yani Wang,Kewei Wang,Xiaopeng Xiong
The persistent presence of antibiotic contaminants, such as fluoroquinolones (FQs), in aquatic environments poses significant environmental risks. In this study, a porous poly(glycidyl methacrylate) (PPGMA) microsphere adsorbent was designed for the efficient removal of FQs. Acrylate monomers were dispersed in water to prepare an oil-in-water high internal phase emulsion, which was subsequently subjected to ultraviolet (UV) irradiation for 3 min to prepare the microsphere with high yield. To template the porous structure, cyclohexane, a poor solvent for the polymer, was introduced into the initial monomer oil phase, and its influence on the evolution of porous morphology was systematically investigated. Thereafter, the porous microsphere was modified through grafting with polyethyleneimine to facilitate the in-situ growth of a metal-organic framework, UiO-66-NH 2 . The modification progress was monitored, and the final UiO@PPGMA microspheres were comprehensively characterized. Based on adsorption kinetics and thermodynamics, the microsphere containing only 2.78 % UiO-66-NH 2 exhibits significantly enhanced adsorption rate and capacity, which can be attributed to the in-situ grown UiO-66-NH 2 nanoparticles. Furthermore, the UiO@PPGMA microsphere can be easily regenerated, allowing it to be packed in a column for cyclic fixed-bed adsorption. Consequently, our results demonstrate a facile strategy for preparing porous microsphere adsorbents, which may have promising applications in the removal of antibiotic contaminants from water sources.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Nannan Huang,Shuhao Liang,Xiangyang Liang,Huining Chai,Yingjie Sun,Lili Lyu,Weiqiang Tan
The interfacial compatibility of heterojunction photocatalysts critically governs the interaction modes between constituent materials. Herein, a flower-like Bi-BDC-NH 2 /Ag 2 CO 3 heterostructure was fabricated via a simple ion-exchange solution method, serving as a robust photocatalyst for the efficient photocatalytic reduction of Cr(VI) in simulated wastewater under visible-light irradiation. Ag 2 CO 3 nanosheets were in-situ grown on the surface of three-dimensional Bi-BDC-NH 2 , forming an Ag 2 CO 3 -on-Bi-BDC-NH 2 type II heterojunction that establishes intimate interfacial contact, significantly accelerating the charge and mass transport dynamics. In comparison with pure Bi-BDC-NH 2 and Ag 2 CO 3 , the optimal Bi-BDC-NH 2 /Ag 2 CO 3 -50 (with a weight ratio of 0.5:1) exhibited dramatically enhanced photocatalytic activity, achieving 99% Cr(VI) reduction within 2 hours under visible light (>420 nm, 150 W xenon lamp). Mechanistic investigations, including energy band structure analysis, radical trapping experiments, and photoelectrochemical measurements, revealed that the heterojunction interface significantly promotes the separation and transfer of photogenerated electron-hole pairs. This work provides valuable insights into the rational design of MOF-based heterojunction photocatalysts and their applications in environmental remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）