SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaoxia Liang,Jiakang Duan,Yu Tian,Yue Han,Zewan Qin,Huixia Zhu,Yating Lu,Dongyu Nie,Yingna Guo,Xia Yang
AgCl/Ag 0 shows great promise for the removal of environmental pollutants, while its photocatalytic performance is still a great challenge on account of the agglomeration. Herein, orientational deposited and octahedral AgCl/Ag 0 were obtained by etching the UiO-66-NH 2 template for the first time. The 0.35:1–AgCl/Ag 0 exhibited outstanding efficiency in the degradation of Diazinon (DZN), which was closely 300 times than that of UiO-66-NH 2 and 0.35:1–AgCl@Ag 0 prepared without a template. Its bigger surface area provided more active sites to promote mass transfer efficiency and large amounts of •OH and 1 O 2 were fabricated to offense specific positions of DZN determined through Fukui function. Meanwhile, a high removal rate of 91.0 % was obtained after 5 recycles. Finally, the results of HPLC-MS, T.E.S.T., TOC and IC indicated all intermediates had less toxicity than DZN and were rapidly mineralized. Our work developed a new strategy for designing superb performance AgCl/Ag 0 photocatalysts.
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
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jie Qin,Wenhui Yao,Liang Wu,Young-Rae Cho,Fusheng Pan
The conventional slippery liquid-infused porous surfaces (SLIPSs) provide relatively limited corrosion protection and self-healing performance for AZ31 Mg alloys. To this end, 8-hydroxyquinoline (8-HQ) was incorporated into a zirconium-based metal–organic framework UiO-66 through coordination (8-HQ@UiO-66), which was then dispersed into silicone oil to fabricate nanoparticle-enhanced-SLIPSs (8-HQ@UiO-66-SLIPSs). Especially, the influences of 8-HQ@UiO-66 concentration on the surface morphology, surface hydrophobicity, and corrosion resistance were studied. It was found that the surface hydrophobicity first increased and then decreased with increasing concentration, showing the highest water contact angle of 121.2° at a concentration of 1 mg mL–1 (8-HQ@UiO-66-SLIPS-1). This was attributed to the development of well-constructed hierarchical micro/nanostructures. Moreover, it also exhibited the best anticorrosion property, with the lowest corrosion current density of 1.24 × 10–10 A cm–2 and the highest impedance modulus of 9.88 × 108 Ω cm2 at 0.01 Hz, primarily associated with the synergistic interaction of 8-HQ and UiO-66. Further, the self-healing performance was evaluated using the scanning vibration electrode technique (SVET), verifying the superior self-healing performance of 8-HQ@UiO-66-SLIPS-1. Hence, the nanoparticle-enhanced-SLIPSs exhibit considerable potential in the corrosion protection of Mg alloys, thereby accelerating their extensive applications in industry.
研究领域:
材料科学
·
腐蚀与防护
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhou Zhou,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
In order to fix the photocatalyst and enhance the efficiency of NO degradation, a three-dimensional (3D) g-C 3 N 4 /NH 2 -UiO-66-rGO (CN/NU6-rGO) aerogel was devised and fabricated via solvothermal reaction and boiling-water bath. Herein, a type-II heterojunction was formed at CN/NU6 composite, and then, the composite was coupled with rGO. The resulting material significantly enhanced the nitric oxide (NO, 600 ppb) removal efficiency under visible-light irradiation. Optimizing the content of CN and rGO to a suitable mass ratio can increase the removal efficiency by 65.4%, which is 2.34 times that of pure NU6. This result is attributed to the construction of type-II heterojunction and the charge transport properties of rGO. The involvement of rGO not only provided extra pathways for charge transfer to prevent electron–hole pairs from recombining, but also fixed the catalyst. Moreover, the hybrid aerogel excellently reduced the harmful by-product NO 2 . Cycling experiments, along with transient photocurrent response measurements, verified that CN/NU6-rGO had excellent potential for recyclable and sustainable. This work might shed light on the construction of suitable photocatalytic systems with significant improvement of NO removal and convenient storage of catalyst.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiajun Yu,Xiao Wang,Yan Wang,Xiaofeng Xie,Haijiao Xie,Nat Vorayos,Jing Sun
The removal of indoor/outdoor toluene by photocatalysis has drawn much attention due to its low energy consumption and easy availability. However, light inevitably generates heat, and pollutants desorb from catalysts as the temperature rises, which is not beneficial to degradation. Contrast to the frequently occurred phenomena, we firstly found that the adsorption capacity of UiO-66 (Zr) on toluene increased with increasing temperature as adsorption isotherms and in-situ Fourier transform infrared spectra (in-situ FTIR) showed. The optimum temperature was 30 °C. This stage in which adsorption capacity was positively correlated with temperature was called heating-induced adsorption, which achieved a toluene removal efficiency of 69.6 %. By density functional theory (DFT) calculations and changing the metal centers and organic ligands of UiO-66 (Zr) respectively, we disclosed that the heating-induced adsorption was mainly related to the π-π stacking interaction of MOF ligands and toluene. The analysis of samples before and after adsorption showed that the interaction between UiO-66 (Zr) and adsorbed toluene facilitated the charge transfer and prolonged the carrier lifetime, leading to the increase of hydroxyl radicals (•OH) in photocatalysis. Therefore, a synergistic effect between heating-induced adsorption and photocatalysis was proposed by analyzing the adsorption of toluene on UiO-66 (Zr) in detail. This work provided new viewpoint to understand the role of concomitant heat contributed to the adsorption and degradation of toluene during photocatalysis.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiaoyan Han,Shan Wang,Tingting Cui,Yumin Yang,Haixiang Li,Haiwen Zhang,Huanhuan Zhou,Xiaoxia Li
Aristolochic acid I (AA-I), a known nephrotoxin and carcinogen, is commonly found in certain medicinal plants, posing significant safety concerns. In this work, defect-engineered, molecularly imprinted UiO-66-NH2 was synthesized via a one-pot hydrothermal method using indomethacin (IND) as a green alternative template. The resulting imprinted metal–organic framework effectively mitigates matrix interference, enabling highly selective recognition and the efficient adsorption of AA-I. Structural characterization confirmed that the imprinting process and template removal did not compromise the framework integrity of UiO-66-NH2. Spectroscopic analysis revealed that AA-I recognition was governed by Zr coordination, electrostatic interactions, and spatially confined recognition sites within the porous framework. Density functional theory calculations further elucidated the interaction mechanisms involved in the adsorption process. The imprinted UiO-66-NH2 exhibited a maximum adsorption capacity of 42.74 mg/g and an imprinting factor of 2.48. In real sample analysis, the material achieved recovery rates of 96.7–103.5% and excellent selectivity in Clematis armandii extracts. The adsorption efficiency remained above 80% after five adsorption–desorption cycles, indicating good structural stability and reusability. This work offers a promising and sustainable strategy for improving herbal medicine safety through the rational design of ecofriendly MOF-based adsorbents.
研究领域:
药用植物学
·
材料科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Yi Wang,Tao He,Siying Lv,Jing Yang,Shihai Cui
Novel type of micro mesoporous materials Co-doped NH 2 -UiO-66 had been successfully prepared. The properties of the material were understood through a series of characterization. When the dosage of Zr:Co is 2:1, the modified material showed specific surface area of 840.02 m 2 ∙g −1 , which is larger than the material without Co. Especially, the material was transformed from microporous NH 2 -UiO-66 to micro-mesoporous Co-doped NH 2 -UiO-66 through the adjustment of metal Co. The Co-doped nanocomposite was then applied to the adsorption of oxytetracycline. The effects of initial concentration, pH, humic acid and ionic strength on the adsorption were investigated. It was found that 50 mg∙L −1 oxytetracycline can be effectively adsorbed by Co-doped NH 2 -UiO-66 in pH 7. Further research showed that adsorption was pseudo-second-order kinetics and fitted Freundlich model with the maximum adsorption capacity 223.7 mg∙g −1 . In addition, the adsorption equilibrium time was only 2 h, which is shorter than the adsorption time of most adsorbents. The mechanism of pore adsorption, π-π interaction, hydrogen bonds and electrostatic interactions was deeply discussed. In conclusion, Co-doped NH 2 -UiO-66 was a fast and effective absorbent for the removal of oxytetracycline in aqueous solution.
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
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Ying Gao,Yong Liu,Lingling Gao,Jinxing Long
An effective strategy is proposed here for transfer hydrogenation of alkyl levulinate to γ-valerolactone (GVL) using a UiO-66 framework modified with phosphotungstate ionic liquid (UiO-66@IL(HPW)). Due to the intensive influence of ionic liquid fragment, the modification significantly enhances the catalytic activity of UiO-66@IL(HPW), leading to a complete conversion of ethyl levulinate with over 93.1% selectivity for GVL. Characterizations techniques, including XRD, N 2 absorption/desorption, SEM, FT-IR, pyridine FT-IR, NH 3 -TPD and CO 2 -TPD, confirm that while the basic structure of UiO-66-NH 2 is insignificantly changed, the introduction of the ionic liquid greatly improves the acidic/base properties of the catalyst. XAFS and XPS results reveal an intensive interaction between the N and W species in UiO-66@IL(HPW), and the formed W-N/O moiety is responsible for the enhanced catalytic activity. In addition, a plausible catalytic mechanism is proposed based upon in situ DRIFTS and density functional theory (DFT) calculations, highlighting the crucial role of ionic liquid fraction within the UiO-66 ligand. Therefore, this work would contribute to the valorization of biochemicals.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Wenli Zhang,Yijie Zhou,Zhenzhen Wu,Cheng Pan,Qunpeng Cheng,Guozhi Fan
A porous sulfonic acid-functionalized zirconium-based metal–organic framework possessing both Lewis acid and Brønsted acid sites (UiO-66-SO 3 H) was synthesized and tested for the selective conversion of furfural (FUR) to isopropyl levulinate (IPL) through one-pot cascade reaction. UiO-66-SO 3 H exhibited excellent catalytic performance, and the conversion of FUR as well as the yield and selectivity of IPL reached 96.4 %, 86.0 %, and 89.2 %, respectively. UiO-66-SO 3 H could be simply recovered and reused, but the catalytic performance was significantly decreased. The FUR conversion and IPL yield dropped to 73.8 % and 65.1 %, respectively, after 1 cycle, and the reason for the decrease in the catalyst activity were also investigated. It was found that the decrease was mainly caused by the loss of some −SO 3 H groups, and the cyclic performance of UiO-66-SO 3 H could be restored by supplementing a small amount of BDC-SO 3 Na. A plausible mechanism for the selective synthesis of IPL from FUR was proposed, wherein both Lewis acid and Brønsted acid sites played important roles. This work provides guidance for the selective conversion of FUR into IPL, and the high-valued utilization of biomass and its derivatives.
研究领域:
化学工程
·
催化科学
·
可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 33
·11705-11712
·
IF 4.099
Cong-Cong Shen,Ya-Nan Liu,Xin Wang,Xiao-Xiang Fang,Zhi-Wei Zhao,Nan Jiang,Liu-Bo Ma,Xiao Zhou,Tuck-Yun Cheang,An-Wu Xu
Metal–organic framework (MOF)-based materials possess numerous attractive characteristics; however, the application of MOF-based photocatalysts in the area of visible-light photocatalytic H2 evolution is still in its infancy. Herein, we develop a series of novel UiO-66-NH2-based composites with embedded NiO nanoparticles via solvothermal treatment and subsequent calcination. Their characterizations demonstrate intimate lattice-level contacts between UiO-66-NH2 photocatalysts and NiO nanoparticles. By optimizing each component, even without noble metal loading, the U6N-NiO-2 sample (the weight ratio of NiO to U6N-NiO-2 is theoretically calculated to be ca. 10 wt%) with 15 mg eosin Y as a sensitizer causes an enhanced H2 generation rate of 2561.32 μmol h−1 g−1 under visible-light irradiation using TEOA as a sacrificial reagent; furthermore, its corresponding quantum efficiency is as high as 6.4% at 420 nm. The H2 evolution activity of U6N-NiO-2 is about 5 times higher than that of the UiO-66-NH2 photocatalyst (denoted as U6N) and 23 times higher than that of U6N-NiO-2 without sensitizer. It is demonstrated that the high efficiency originates from the visible-light generated electrons of eosin Y and UiO-66-NH2, the efficient separation of carriers by the cascaded band structure and more negative CB of NiO as well as the good dispersion of NiO nanoparticles on the octahedral skeleton. This study provides new insights for the design of MOF-based materials without noble metal loading for visible-light photocatalytic H2 evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Lingling Wang,Penglun Zheng,Xuefei Zhou,Mingzhen Xu,Xiaobo Liu
Novel CdS/UiO-66-NH 2 heterojunction photocatalysts have been successfully fabricated via facile water bath deposition. Compared with the traditional preparation technology, such strategy introduces deionized water as solvent, reduces production cost and simplifies the fabrication process of the heterojunction photocatalyst. Characterizations indicate that CdS nanoparticles (NPs) are uniformly interspersed on the surface of UiO-66-NH 2 and the intimate contacted heterojunction interface is generated to prevent recombination of photogenerated charge carriers. CdS/UiO-66-NH 2 with a mass ratio of 1.5:1 (CdS: UiO-66-NH 2 ) exhibits the highest photocatalytic degradation rate for RhB of approximately 92.5% in 40 min and excellent photostability through four recycles. Furthermore, Photoluminescence (PL) spectra, UV–vis diffuse reflectance spectra (DRS), transient photocurrent, electrochemical impedance spectra (EIS), Nyquist plots and Mott-Schottky plots are applied to characterize the photoelectrochemical properties. The observably enhanced photocatalytic performance can be attributed to: 1) larger specific surface area, increased photocatalytic active sites, intimate contacted interface, 2) created n-n type heterojunction, and 3) rapid separation and transfer of photoexcited interfacial charges.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PLASMA SCIENCE & TECHNOLOGY
·
2025
·
IF 1.8
Ruiting Jian,Qirui Zou,Jianjun Yan,Bowen Liu,Lijun Sang,Zhongwei Liu
Cr(VI), a hazardous heavy metal pollutant found in wastewater, exerts detrimental effects on biological system and the human body. Efficient photocatalytic reduction of Cr(VI) to Cr(III) using high-performance materials offers a viable approach for chromium decontamination. In the current work, the defective UiO-66-(OH)2 with enhanced photocatalytic activity was developed by the plasma treatment. These defects not only triggered an expansion in mesoporous domains and increased the BET surface area of the UiO-66-(OH)2 system, thereby exposing more adsorption and photocatalytically active sites, but also created additional electron migration pathways, enhancing the separation of photogenerated e-/h+ pairs. When subjected to an operating power of 15 W, chamber pressure at 20 Pa, and a 300-second treatment period, UiO-66-(OH)2 exhibited a removal efficiency of 83 %. This work explored a novel way for the construction of the defective MOFs and broadened the utilizationation of MOFs in the fields of photoreduction of heavy metal ions in water.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-10
·
IF 5.3
Ma Jinzhu,Shi Yu-e,Song Qian,Kou Shufang,Wang Zhenguang
Dual-emissive fluorescence probes were designed by integrating porphyrin into the frameworks of UiO-66 for ratiometric fluorescence sensing of amoxicillin (AMX). Porphyrin integrated UiO-66 showed dual emission in the blue and red region. AMX resulted in the quenching of blue fluorescence component, attributable to the charge neutralization and hydrogen bonds induced energy transfer. AMX was detected using (F 438 /F 654 ) as output signals. Two linear relationships were observed (from 10 to 1000 nM and 1 to 100 µM), with a limit of detection of 27 nM. The porphyrin integrated UiO-66 probe was used to detect AMX in practical samples. This work widens the road for the development of dual/multiple emissive fluorescence sensors for analytical applications, providing materials and theoretical supporting for food, environmental, and human safety. Graphical Abstract
研究领域:
分析化学
·
食品安全
·
材料科学
✓ 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）