CHEMISTRY AND ECOLOGY
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2024
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IF 1.3
Zhenpeng Li,Dongmei Yan,Jun Li,Ziwei Mai,Fuchuan Huang
Hexavalent chromium (Cr(VI)) is regarded as a water pollutant because of its high toxicity in aquatic environments. In this study, polyethyleneimine-functionalised NH2-MIL-101(Cr) (PEI@NH2-MIL-101(Cr)) was fabricated by a facile wet impregnation method, and its effectiveness at removing Cr(VI) from wastewater was systematically investigated. As suggested by the experimental findings, pH was a significant determinant of Cr(VI) uptake by the fabricated PEI@NH2-MIL-101(Cr). Preferable depiction of adsorption system was achievable with the Langmuir adsorption model and the pseudo-order 2 kinetic model. At 288, 298, and 308 K, the highest adsorbability values were 241.55, 310.56, and 408.16 mg g−1, respectively. Processes like electrostatic attraction, reduction and chelation helped promote the Cr(VI) elimination. SO42− ions had a relatively large impact on the Cr(VI) adsorption compared with other coexisting ions such as NO3−, Cl− and H2PO4−1. Because of its properties of high adsorption capacity and Cr(VI) detoxification, the potential of PEI@NH2-MIL-101(Cr) in the Cr(VI) elimination from wastewater appears to be promising.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 19
·1-15
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IF 2.8
Li Zi-Yan,Li Ya-Jun,Li Wei,Wang Ze-Hong,Zhao Zhao-Ye,Zhou Ting-Ting,Huang Yi-Rui,Wu Xiang-Feng,Zhang Peng-Liang,Zhen Zi-Yan,Ci Li-Jie
In this study, a photoelectrochemical sensor for the detection of glucose was developed by combining the unique properties of NH 2 -MIL-125 and Ti 3 C 2 film. The relationship between the microstructure of the samples and their performance in glucose detection was investigated. Experimental results demonstrated a linear decrease in the differential pulse voltammetry current of the Ti 3 C 2 /NH 2 -MIL-125-3 photoelectrochemical sensor with increasing glucose concentration. Below 200 μM, the relationship between DPV current and glucose concentration was found to be: I (mA) = − 3.86667 × 10 –8 ·c g (μM) + 3.66 × 10 –4 (c g denoted as the concentration of glucose). Above 200 μM, the relationship was: I (mA) = − 4.03049 × 10 –8 ·c g (μM) + 3.68268 × 10 –4 . Density functional theory calculations were in agreement with the experimental data. The Ti 3 C 2 /NH 2 -MIL-125-3 photoelectrochemical sensor demonstrates exceptional glucose detection capability. This technology has the potential to advance the development of MXenes/MOFs-based photoelectrochemical biosensors.
研究领域:
生物传感
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材料科学
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分析化学
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DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 7
·1839-1849
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IF 3.146
Zhang Xiaoting,Zhang Shusheng,Ouyang Gangfeng,Han Runping
A zirconium-based metal organic framework (UiO-66-NH 2 ) was prepared using a greener approach for the removal of hexavalent chromium (Cr(VI)) from solution. The characterization of UiO-66-NH 2 was performed using several methods, and the influence of the solution pH, adsorbent dosage, salt, adsorption time, Cr(VI) concentration and adsorption temperature on adsorption quantity was performed in batch mode. UiO-66-NH 2 can efficiently remove Cr(VI) through the synergistic effect of adsorption and reduction. At pH solution of 1.1 and solid-to-liquid ratio of 2 g·L −1 , the removal rate of 100 mg·L −1 Cr(VI) increased to 95.2%. The maximum adsorption capacity of UiO-66-NH 2 from Langmuir model was 252 mg·g −1 . The adsorption equilibrium process can be well described by Langmuir, Koble-Corrigan and Temkin models, while the kinetic process can be predicted by pseudo-second-order and Elovich model. UiO-66-NH 2 showed a good adsorption capacity in a wide range of pH (pH=1.1–10) and also had better regeneration performance after five cycles using 0.01 mol·L −1 NaOH; consequently, it can be a promising adsorbent for the removal of Cr(VI) from solution.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
·
IF 4.2
Z.H.A.O.-X.U.A.N. Jiang
In this investigation, UiO-66-NH 2 was effectively synthesized through a solvothermal approach, utilizing benzoic acid and hydrochloric acid (HCl) as modulating agents. This synthesis process intentionally introduced defects mediated by benzoic acid, and the degree of these defects was precisely adjusted by the concentration of HCl. Subsequently, the material underwent a covalent modification process through an amidation reaction, resulting in the attachment of tetrakis (4-carboxyphenyl) porphyrin (TCPP). The results demonstrated a significant improvement in the photocatalytic reduction of Cr(VI), showcasing a 125 % elevation in reduction efficiency as compared to the unmodified UiO-66-NH 2 material serving as the baseline. The performance enhancement is due to the synergistic effect of the defect structure and TCPP modification, which enhances the light absorption, promotes charge transfer and separation, reduces the recombination rate, and improves the adsorption capacity and light absorption efficiency of Cr(VI). This research introduces an innovative approach and a highly effective catalyst, offering a novel solution for modifying metal-organic frameworks (MOFs) and enhancing their photocatalytic performance in the reduction of Cr(VI).
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 MEMBRANE SCIENCE
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2018
·
IF 6.578
Xiong-Fei Zhang,Yi Feng,Zhongguo Wang,Mingmin Jia,Jianfeng Yao
Incorporating metal-organic frameworks into cellulose matrix to prepare composite membranes is promising in gas-separation applications. In this study, UiO-66-NH 2 (Zr-based MOF) nanoparticles are wrapped into the densely packed cellulose nanofibrils (CNF-COOH) via a facile vacuum filtration process. The existence of acid-base interactions and electrostatic forces between UiO-66-NH 2 and CNF-COOH renders ideal interfacial morphology. Results show that UiO-66-NH 2 is cross-linked by -COOH groups and well-dispersed in the CNF matrix. The porous UiO-66-NH 2 strengthens the diffusion process of CO 2 molecules, thus elevating the permeation flux and separation factor simultaneously. The optimum separation performance is achieved over CM-1 membrane with a CO 2 permeability of 139 Barrer and a CO 2 /N 2 selectivity ratio of 46.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Pengfei Zhu,Shuang Qin,Mengrong Geng,Heyang Cao,Zhiliang Jin,Chuanyi Wang
Photocatalytic NO removal technology is considered as one of the most effective green methods for reducing atmospheric NO but there remains the problems of lower efficiency and poor stability of photocatalysts . Rapid recombination of photogenerated electron (e − ) and holes (h + ) is known as a key issue that causes low activity and poor stability of catalysts. Herein, we report a novel AgCu@UiO-66-NH 2 photocatalyst (AgCu@UN) that is made up of AgCu alloy on the surface of Zr-MOF (UiO-66-NH 2 ) by employing in-situ photodeposition method. The experimental results of photocatalytic NO removal indicated that the optimized 0.5Ag0.5Cu@UN sample with 0.5 mg of Ag and Cu exhibited the best NO removal efficiency of 63 % for ppb-level atmospheric NO, more higher than that of pure UiO-66-NH 2 (38 %). The characterizations suggested that the excellent photocatalytic performance of 0.5Ag0.5Cu@UN can be ascribed to the efficient charge separation and transfer and the visible-light-harvesting ability due to benefiting electron migration process between AgCu alloys and UN. Moreover, the enriched electrons around AgCu could be transferred to O 2 to generate more superoxide radicals (•O 2 − ), which could oxidize NO to the final product, nitrate (NO 3 − ). The present findings can provide some novel insights for the design of efficient MOF based photocatalysts to eliminate low concentrations of NO X .
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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DOI
高影响因子
INORGANIC CHEMISTRY
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2025
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IF 4.7
Xian-Yu Shen,Ya-Nan Wang,Ya-Ting Zheng,Ye Wang,Wen-Wen Dong,Jun Zhao,Dong-Sheng Li
Formaldehyde (HCHO), a crucial industrial chemical, finds extensive applications across diverse sectors, including household products, commercial materials, aviation, and medical supplies. Methane (CH4), as an abundant C1 resource, presents a promising feedstock for HCHO synthesis. However, the direct conversion of CH4 to HCHO remains challenging due to its inherent chemical inertness, characterized by low polarizability and high C–H bond dissociation energy (439 kJ mol–1), coupled with the high reactivity of intermediate products. The development of efficient strategies for selective CH4 oxidation to high-value HCHO under mild conditions is therefore of significant practical importance. In this study, we developed a series of MIL-125-NH2@FeOOH-x heterostructured photocatalysts (FM-x) through the controlled deposition of FeOOH nanoparticles on MIL-125-NH2 surfaces. Comprehensive characterization and photocatalytic evaluations reveal that the optimized FM-1 catalyst facilitates in situ H2O2 generation and subsequent decomposition into hydroxyl radicals (•OH), enabling efficient CH4 photooxidation. Remarkably, the FM-1 catalyst achieves an exceptional HCHO production rate of 197.79 μmol·gcat–1 with >99.99% selectivity in water vapor, significantly outperforming both pristine FeOOH and MIL-125-NH2 components. This work presents a promising photocatalytic system for selective CH4 conversion, offering new insights into the design of efficient catalysts for C1 chemistry.
研究领域:
化学工程
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
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2022
·Vol. 37
·期 21
·3761-3772
·
IF 2.909
Chen Junnan,Lin Wensong,Mai Xin,Yang Qian
In this work, the flower-like hierarchical Bi 2 WO 6 decorated with nano UiO-NH 2 -66 was fabricated by a two-step solvothermal method. The structure, composition, and morphology of the composites were characterized by XRD, FTIR, XPS, BET, and SEM. The photoelectrochemical properties of the composites were analyzed by transient photocurrent response, DRS, and PL spectra. It is found that hole (·h + ) plays a dominant role, and the hydroxyl radical (·OH) and superoxide radical (·O 2 − ) play a secondary role in the catalytic system after free radical trapping experiments. The results of electron spin resonance spin-trapping tests also confirm the mechanism. Compared with pure Bi 2 WO 6 or pure UiO-NH 2 -66, Bi 2 WO 6 /UiO-NH 2 -66 composites have much higher decomposition effectiveness of Rhodamine B under the same conditions. Furthermore, Bi 2 WO 6 /UiO-NH 2 -66 photocatalyst with 7 wt% of UiO-NH 2 -66 (denoted as BWO/UNH-7) kept the stable catalytic performance after five recycles, which may be used as a good photocatalyst for degrading organic matter in sewage. Graphical abstract
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Particuology
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2024
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IF 4.1
Jingchuan Wang,Junhong Luo,Yong Yao,Jiangfeng Song,Yan Shi
To improve room-temperature hydrogen storage, palladium (Pd) nanoparticles were innovatively decorated by carbon bridge onto the amino-group functioned Zr-terephthalate metal-organic framework (MOF) UiO-66 to reduce the diffusion energy barrier and then improve the hydrogen spillover effect. Powder X-ray diffraction shows broad Pd peak and retained UiO-66-NH 2 integrity after Pd decoration. The hydrogen uptake capacity show that UiO-66-NH 2 -Pd exhibits best hydrogen storage performance than UiO-66-NH 2 and pristine UiO-66. The hydrogen up taken in Pd decorated UiO-66 (UiO-66-NH 2 -1Pd) was close to 4 wt% under 20 MPa at room temperature. Density functional theory (DFT) calculations show that hydrogen adsorption energy of UiO-66-NH 2 -Pd was −0.5897 eV, which was much lower than that of UiO-66-NH 2 (−0.3716 eV) and UiO-66 (−0.2975 eV). Ultimately, Pd decorated NH 2 group functioned UiO-66 enable improve storage capacities through hydrogen spillover under ambient conditions which could satisfy the demand for sustainable energy, especially for the long-term storage energy media.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2024
·Vol. 59
·期 44
·20624-20639
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IF 3.5
She Houde,Chen Dongxu,Huang Jingwei,Wang Lei,Chen Jiufu,Chen Xiaoping,Wang Qizhao
The removal of volatile organic compounds has been a long-standing challenge, and NH 2 -MIL125, with its large specific surface area, has shown great promise in this regard. However, its limited number of active sites hinders its widespread application. To address this limitation, we report the successful synthesis of a series of Co 3 O 4 -modified NH 2 -MIL125 metal–organic framework (MOF) composites with a lamellar structure. Notably, the optimized 35% Co 3 O 4 /NH 2 -MIL125 composite exhibited exceptional performance, achieving 85.59% degradation and 76.58% CO 2 conversion under simulated sunlight. Moreover, this composite demonstrated excellent stability, maintaining a degradation rate of 79.67% over 520 min. The enhanced performance is attributed to the large specific surface area of NH 2 -MIL125, as well as the Co 3 O 4 modification, which provides new active sites, enhances light utilization efficiency, accelerates the separation of photogenerated carriers, and facilitates the generation of reactive radicals. This in-situ growth strategy for modifying NH 2 -MIL125 with Co 3 O 4 offers a novel approach to expand the application scope of NH 2 -MIL125 and enhance its performance in toluene degradation. Graphical abstract
Characterization of layered Co 3 O 4 -modified NH 2 -MIL125 catalysts, evaluation of photocatalytic degradation performance of toluene, photogenerated carrier migration, and separation studies.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2024
·Vol. 13
·期 5
·057004
·
IF 1.8
Yu Ding,Yaru Li,Soufian Chakir,Jun Mei,Xianbiao Wang
Phosphate pollution leads to deterioration in water quality, posing a serious threat to human health. Therefore, it is important to develop a highly selective and sensitive fluorescent probe for phosphate detection. Here, we report a novel ratiometric fluorescent probe, Fluorescein@NH2-UiO-66 (denoted as Flu@NH2-UiO-66), for the trace detection of phosphate in water. Specifically, during the in situ solvothermal synthesis of Flu@NH2-UiO-66, fluorescein molecules were encapsulated into the cavities of the metal-organic framework. Furthermore, the encapsulation amount of fluorescein was controlled by adjusting the acidity of the system. The Flu@NH2-UiO-66 (60 H+) sample, prepared with a 60:1 molar ratio of acetic acid to the metal center exhibited distinct dual fluorescence signal peaks. The probe showed a highly selective fluorescence response to phosphate. Within a range of 0–20 μM phosphate concentration, the probe demonstrated excellent linear detection capability with a detection limit of 0.37 μM. Moreover, the mechanism of fluorescence enhancement can be attributed to the addition of phosphate, which greatly increases the UV absorbance of the probe. This study developed a novel ratiometric fluorescent probe capable of rapid, sensitive, and stable detection of trace phosphate, which is of great significance for environmental management.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Xuanhao Liang,Guangyuan Chen,Hao Zhang,Ling Zhang,Tao Duan,Lin Zhu
Ti-based MOFs exhibit ultra-high stability in radioactive waste gases containing nitrogen oxides (NO X ) and are effective in capturing radioactive iodine. In this study, NH 2 -MIL-125 was synthesized via a one-pot solvothermal method and its adsorption performance for iodine was investigated using batch adsorption experiments, the stability of materials was tested by simulating post-processing conditions. The results indicated that NH 2 -MIL-125 had a maximum iodine adsorption capacity of 1.61 g/g at 75 ℃ and reached adsorption equilibrium within 60 min, and the adsorption capacity of methyl iodine reached 776.9 mg/g. The material also exhibited excellent stability and iodine adsorption performance in the presence of NO X . After soaking in NO 2 for 24 h, its structure remained stable and the adsorption capacity for iodine remained at 231.5 mg/g. The excellent co-adsorption performance of NH 2 -MIL-125 on iodine and NO X was attributed to the synergistic effects of Ti-OH groups and amino functional groups. These findings provide a reference for the capture of radioactive iodine and also demonstrate the potential of NH 2 -MIL-125 for iodine capture during spent fuel reprocessing .
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）