LANGMUIR
·
2023
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IF 3.9
Lihong Wei,Yao Zhang,Jinyuan Jiang,Yinbo Yang,Hui Liu
In this work, the Br functional group on the ligand UiO-66-Br was modified with a Bi–O bond through the secondary solvothermal method, and the synthesis method of visible light catalyst UB (UiO-66-BiOBr) with high electron mobility was explored. The findings indicate that the effective charge transfer of the functional group-modified material UB is 2.98 times and 1.22 times that of BiOBr and traditional UiO-66/BiOBr heterojunctions, respectively. Under simulated sunlight irradiation, the removal rate of tetracycline can reach 88.71%, and the photocatalytic performance is 22.73 times higher than that of UiO-66-Br. Moreover, it maintains good adsorption and photocatalytic performance under different laboratory and actual engineering water environment conditions. In the complex water environment of municipal wastewater, the degradation effect reaches more than 80%. Finally, the decomposition pathways of TC and ecotoxicities of the intermediates were analyzed via combining theoretical calculation, LC–MS/MS, and T.E.S.T.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Yuanyuan Cui,Jianmin Sun
The direct oxidative carboxylation of olefins and CO 2 to synthesize cyclic carbonates involves a tandem process of epoxidation and CO 2 cycloaddition reactions. However, designing a multifunctional catalyst for this reaction remains challenging. Herein, a composite catalyst ImBr@UiO-66-Br(Co) was synthesized by post-metallization of Co 2+ and subsequent functionalization with an imidazole ionic liquid (IL), which was used effectively for this reaction. The effects of temperature, CO 2 pressure, catalyst dosage, and reaction time on the direct oxidative carboxylation of olefins to cyclic carbonates were investigated. The results showed that ImBr@UiO-66-Br(Co) exhibited optimal performance in the solvent-free reaction system with styrene (3 mmol), tert -butyl hydroperoxide (6 mmol), and tetrabutylammonium bromide (TBAB, 50 mg) at 80 ℃ under 1 MPa CO 2 for 24 h, achieving a styrene conversion of 90.3 % and styrene carbonate selectivity of 80.7 %. The excellent catalytic activity of ImBr@UiO-66-Br(Co) was attributed to the synergistic interactions of the Lewis acidity Zr 4+ sites, the strong nucleophilicity provided by Br - , the weak base sites from tertiary amine and quaternary ammonium groups in imidazole IL, and the redox-active Co 2+ sites. Additionally, the catalyst was easy to separate and maintained stable activity and selectivity over at least five cycles. Finally, the potential catalytic mechanism for the direct oxidative carboxylation of olefins to cyclic carbonates was proposed.
研究领域:
材料化学
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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
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Linna Han,Zixu Wang,Wanfang Feng,Qing Xia,Yucun Niu,Liyan Liu
Background The enrichment of sugar phosphates (SPx) from complex biological samples was of significant importance for elucidating their roles in physiological and pathological processes. However, the detection of SPx faced numerous challenges due to the high structural similarity among its isomers, its extremely low abundance within cells, the complexity of biological samples, and the inefficiency and cumbersome nature of traditional enrichment methods. Therefore, there was an urgent need to develop an efficient enrichment technique, leveraging the advantages of magnetic separation to achieve precise detection of sugar phosphates in biological samples. Results A novel magnetic material, Fe 3 O 4 @UiO-66-Br, was synthesized for efficient and convenient enrichment of SPx in biological samples. The material exhibited a high specific surface area (225.08 m 2 /g) and strong magnetism (33.61 emu·g −1 ). Only 600 μg of Fe 3 O 4 @UiO-66-Br was required to completely adsorb five types of SPx within 4 min. The adsorption process was pH-tolerant and can be accomplished simply by standing. Kinetic, thermodynamic, and isotherm studies revealed favorable adsorption properties, characterized as spontaneous and endothermic monolayer chemisorption. Mechanistic studies using XPS, FT-IR, and DFT identified multiple interactions, including coordination, hydrogen bonding, and electrostatic interactions. The analytical protocol featured a wide linear range (0.01–10000 ng/mL), low detection limits (0.002–0.01 ng/mL), high precision (RSD<13.21 %), and accuracy (80.05 %–116.41 %). Significance The protocol was successfully applied to real blood samples, demonstrating the potential of magnetic MOFs for SPx adsorption and detection. This novel material and protocol provided an efficient approach for enriching and detecting trace SPx in complex biological matrices, facilitating further studies on their roles in physiological and pathological processes.
研究领域:
分析化学
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材料科学
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生物化学
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纳米技术
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Danfei Liu,Yunfei Zhong,Xiaoxuan Li,Yumei Pu,Siyuan Chen,Changfan Zhang
This study presented a novel indicator film for monitoring chicken freshness based on polyvinyl alcohol (PVA) and chitosan (CS) incorporated with a natural dye of anthocyanin loaded on MOFs (UiO-66 and UiO-66-Br) carriers. The characterization results of UiO-66/A and UiO-66-Br/A dyes showed that most anthocyanins bind to MOFs by intermolecular forces without disrupting the MOFs structure. Different dyes (anthocyanin, UiO-66/A, UiO-66-Br/A) with the same effective dye content were added into PVA/CS matrices to form PVA/CS/A (PCA) film, PVA/CS/UiO-66/A (PCUA) film and PVA/CS/UiO-66-Br/A (PCBA) film. With the addition of UiO-66/A and UiO-66-Br/A, the tensile strength and elongation at break of indicator films decreased. Small amounts of dye migration were observed in acidic and neutral food simulants for PCUA and PCBA films, while no dye migration was observed in alcoholic food simulants. PCUA and PCBA films exhibited higher sensitivity for detecting ammonia vapor, with a detection limit of 24.39 ppm for PCBA films. When all films were used to monitor changes in chicken breast freshness, PCBA films presented more accurate color changes than other films. The BP neural network-based prediction model utilizing the color change of PCBA film effectively predicted the freshness of chicken breast.
研究领域:
食品科学
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材料科学
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化学工程
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人工智能
✓ 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）