APPLIED CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Ruowen Liang,Shuiguang Luo,Fenfen Jing,Lijuan Shen,Na Qin,Ling Wu
The effective treatment of pharmaceutical and personal care products (PPCPs) contained wastewater remains a significant but challenging task for the environmental restoration. In this work, a novel Pd@MIL-100(Fe) nanocomposite has been successfully fabricated via a facile alcohol reduction approach. The resulting Pd@MIL-100(Fe) has exhibited superior photoactivity toward degradation of three typical PPCPs, that is theophylline, ibuprofen and bisphenol A, under visible light irradiation ( λ ≥ 420 nm). Its photoactivity is also much higher than that of original-MIL-100(Fe). Combining with photoelectrochemical analyses, it could be revealed that the introduction of Pd NPs would minimize the recombination of photogenerated electron–hole pairs, thereby improving the photocatalytic performance. Furthermore, the effects of different kinds of metals, the loading amount of noble-metal, the pH value of reaction solution and initial concentration of hydrogen peroxide on the photocatalytic degradation activities have been measured in detail. In addition, a possible photocatalytic reaction mechanism has been investigated. This work has not only represented the first example of using the MOFs photocatalysts to remove the aqueous PPCPs, but also offered useful information on the fabrication of efficient MOF photocatalysts for environmental restoration.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2012
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IF 1.693
Ru-Hao He,Bing-Wen Long,Ying-Zhou Lu,Hong Meng,Chun-Xi Li
To study the possibility of using ionic liquids (ILs) as a novel solvent for the absorption of hydrogen chloride (HCl) from the industrial tail gases, the solubility of HCl gas in three ILs has been measured at four temperatures, (298.15, 323.15, 348.15, and 363.15) K, in the pressure range of (0 to 100) kPa. The ILs used are 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), 1-hexyl-3-methylimidazolium chloride ([Hmim]Cl), and 1-octyl-3-methylimidazolium chloride ([Omim]Cl). The results indicate that these ILs show high solubility for HCl gas, and the solubility decreases with the increasing length of the alkyl substitutes of the ILs, following the order [Bmim]Cl > [Hmim]Cl > [Omim]Cl. The solubility of HCl in [Bmim]Cl at 298.15 K is about 0.68 mole fraction at ca. 100 kPa partial pressure of HCl, which is much higher than that of 36.5 % HCl aqueous solution. The solubility of different ILs is discussed in detail, and the experimental data (P–T–x) are correlated successfully by an empirical relation.
研究领域:
化学工程
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绿色化学
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气体分离
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离子液体
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环境工程
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Siqi Liu,Shanshan Cheng,Zhimeng Liu,Miaomiao Zheng,Hongyuan Wang,Supakorn Boonyuen,Hongyi Gao,Ge Wang
Reactive oxygen species (ROS)-mediated sterilization typically relies on continuous light irradiation or exogenous H 2 O 2 addition, limiting their practical utility under dark or resource-limited conditions. Herein, we rationally design an S-scheme MIL-100(Fe)/Zn 3 In 2 S 6 heterojunction (M 5 Z 1 –1@ZIS2) by in-situ growing Zn-doped MIL-100(Fe) on Zn 3 In 2 S 6 , achieving synergistic light-harvesting and ROS self-supply capabilities. The incorporation of Zn 3 In 2 S 6 enhances electron density around Fe 2+ sites while modulating Fe 3+ states, significantly improving O₂ activation and H 2 O 2 affinity. This unique electronic regulation enables the heterojunction to generate superoxide radical(·O₂ − )-dominated ROS even in the dark. Notably, visible-light pretreatment induces active In sites in Zn 3 In 2 S 6 to produce H 2 O 2 , which accumulates and sustains the FeII/FeIII redox cycle in the absence of light, driving continuous hydroxyl radical(·OH)-dominated ROS generation. Combined characterizations including X-ray photoelectron spectroscopy (XPS) and Electron Paramagnetic Resonance (EPR) confirm H₂O₂-mediated Fe 2+ regeneration and ROS persistence. The M 5 Z 1 –1@ZIS2 heterojunction exhibits exceptional antibacterial performance, achieving ≥99.9% inactivation of Escherichia coli ( E. coli ) within 1.5 h in the dark and 40 min under visible light. This work provides a strategy for designing self-sustaining catalytic systems that leverage light-driven H₂O₂ supply to enable day-night ROS functionality. Furthermore, M 5 Z 1 –1@ZIS2 loaded on polyvinylidene fluoride (PVDF) film can achieve an efficiency of over 99% for particulate matter (PM) pollutants at the wind speeds of 1.5 m/s and 0.5 m/s and reach a maximum adsorption efficiency of 99.5% for formaldehyde within 19 min, highlighting its potential for all-weather air purification via ROS-mediated environmental remediation.
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CHEMISTRY-A EUROPEAN JOURNAL
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2011
·Vol. 17
·期 35
·9708-9719
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IF 5.476
Wei Wu ,Shaofeng Zhang ,Juan Zhou ,Xiangheng Xiao ,Fen Ren ,Changzhong Jiang
Graphical Shape and size control of sub-100 nm SnO 2 hollow nanostructures, such as the depicted hollow nanospheres, was achieved by a mild template- and surfactant-free hydrothermal route starting from potassium stannate and urea in ethylene glycol/water. Precise control of morphology and size is possible by varying reaction parameters, such as reaction time, urea concentration, and reaction temperature. Controlled synthesis of low-dimensional materials, such as nanoparticles, nanorods, and hollow nanospheres, is vitally important for achieving desired properties and fabricating functional devices. We report a systematic investigation of the growth of low-dimensional sub-100 nm SnO 2 hollow nanostructures by a mild template- and surfactant-free hydrothermal route, aiming to achieve precise control of morphology and size. The starting materials are potassium stannate and urea in an ethylene glycol (EG)/H 2 O system. We found the size of the SnO 2 hollow nanospheres can be controlled by simply adjusting the urea concentration. Investigation of the mechanism of formation of the SnO 2 hollow nanospheres revealed that reaction time, urea concentration, and reaction temperature make significant contributions to the growth of hollow nanospheres. On switching the solvent from EG/H 2 O to H 2 O or ethanol, the SnO 2 nanostructures changed from nanospheres to ultrafine nanorods and nanoparticles. On the basis of reaction parameter dependent experiments, oriented self-assembly and subsequent evacuation through Ostwald ripening are proposed to explain the formation of hollow nanostructures. Their size-dependent optical properties, including UV/Vis absorption spectra and room-temperature fluorescence spectra, were also studied. Moreover, the studies on the photocatalytic property demonstrate that the fabricated hollow structures have slightly enhanced photocatalytic degradation activity for rhodamine B when exposed to mercury light irradiation compared to solid SnO 2 nanospheres under the same conditions. The synthesized tin oxide nanoparticles display high photocatalytic efficiency and have potential applications for cleaning polluted water in the textile industry.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Yanrong Cheng,Xia Guo,Delan Ge,Wenlin Xu,Yaqiong Wang
Broadening the polarity range of polymer-based aqueous two-phase systems (ATPSs) is of practical significance. Recently, ionic liquids have been used as adjuvants to modify the polarity and properties of PEG-rich phases in PEG/salt ATPSs. However, thus far, only short alkyl (containing less than 8 carbon atoms)-chained ionic liquids have been able to promote the extraction performance of ATPSs; long alkyl-chained ionic liquids have decreased the extraction performance significantly due to their distribution in the bottom phase. In the present study, we found that by complexing with Triton X-100 (TX-100), long alkyl-chained imidazolium ionic liquids [C n mim]Br (n = 10 and 12) as adjuvants were enriched in the top phase of PEG/salt ATPSs, and hence, the polarity difference of the two phases were increased. By extracting two model substances (S-mandelic acid (MA) and l -tryptophan (Trp)), it was concluded that, although the long alkyl-chained [C n mim]Br adjuvant decreased the extraction performance of the ATPS substantially, the long alkyl-chained [C n mim]Br/TX-100 complex as the adjuvant enhanced the extraction performance of the ATPS significantly. Compared with the case without an adjuvant, when the [C 12 mim]Br/TX-100 complex and the [C 10 mim]Br/TX-100 complex were used as the adjuvants, the partition coefficients of MA and Trp in the PEG 600/(NH 4 ) 2 SO 4 ATPS were increased up to 3 ∼ 4 times, much better than those with short alkyl-chained ionic liquid as the adjuvant. Moreover, the [C 12 mim]Br/TX-100 complex is more conductive to the transfer of MA into the PEG-rich phase, and the [C 10 mim]Br/TX-100 complex is more conductive to the transfer of Trp into the PEG-rich phase.
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JOURNAL OF RAMAN SPECTROSCOPY
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2022
·Vol. 53
·期 4
·682-693
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IF 2.727
Hongbin Pu,Haofan Zhu,Fang Xu,Da-Wen Sun
Malachite green (MG) abuse in aquaculture has caused food safety issues and surface-enhanced Raman scattering (SERS) can be utilized to monitor MG residues in aquatic products. However, the sensitivity and accuracy of SERS detection are limited by food matrix interference. Therefore, in this study, SERS active MNP@Au@MIL-100(Fe) substrates were developed by utilizing magnetic nanoparticle (MNP) as the core, which was evenly decorated with Au nanoparticles (AuNPs), and then coated with metal–organic frameworks (MOFs) shell of MIL-100(Fe), which acted as a filter to only allow molecules with appropriate sizes to approach the inner AuNPs, thus avoiding food matrix interference and improving the identification ability to analytes. Experiments in detecting MG residues in prawns was realized with the limit of detection (LOD) of 1.32 × 10 −10 M, showing great potential for its use as a reliable SERS substrate for monitoring food contaminants.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2015
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IF 2.587
Meng Chen,Jiaqi Yan,Ying Tan,Yongfei Li,Zhimin Wu,Langsheng Pan,Yuejin Liu
Hydroxyalkylation of phenol with formaldehyde to bisphenol F was investigated over the metal–organic frameworks of MIL-100(Fe or Cr) and MIL-101(Fe or Cr) encapsulated with Keggin phosphotungstic acid (PTA). PTA@MIL-100(Fe or Cr)(β) and PTA@MIL-101(Fe or Cr)(β) with different β values (the molar ratio of W/M, where M = Fe or Cr) were prepared and characterized by XRD, BET, FT-IR, TG, SEM, TEM, and ICP. The research results showed that PTA@MIL-100(Fe or Cr)(β) had a higher catalytic activity than PTA@MIL-101(Fe or Cr)(β). PTA@MIL-100(Fe)(0.4) was the most effective among the studied catalysts and had excellent reusability. A 92.12% product yield and 93.01% selectivity for bisphenol F could be obtained over the PTA@MIL-100(Fe)(0.40) catalyst. The effects of the reaction time, reaction temperature, catalyst concentration, and phenol/formaldehyde molar ratio on the reaction performance were also investigated. A plausible mechanism for hydroxyalkylation of phenol with formaldehyde to bisphenol F was proposed.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Xiaoyu Zheng,Lin Xing,Xuemei Zhou,Yulian Tang,Zhen Liu,Xueting Zhang,Lei Hu,Zhengquan Yan
To monitor toxic NO 2 − and S 2− conveniently and effectively in 100% aqueous, nano CeO 2 was identified and modified first onto 2-dimensional Co 3 O 4 substrate (CeO 2 @2D Co 3 O 4 ) under microwave-assisted conditions at 140 °C. The obtained CeO 2 @2D Co 3 O 4 expressed excellent stability and superior oxidase-mimic activity with a wide temperature range from 20 to 60 °C. Under the optimized conditions (pH 4.0, 25 °C, 0.07 mM TMB), CeO 2 @2D Co 3 O 4 could accelerate the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to its blue oxidation (oxTMB) within 12 min at room temperature , whose Michaelis constant ( K m ) and maximal reaction rate ( v max ) were 0.017 mmol/L and 2.17 × 10 −7 mol/L·s –1 respectively. Especially, both NO 2 − and S 2− could exclusively make the blue CeO 2 @2D Co 3 O 4 -TMB system into colorless and green respectively, expressing significant visibility. When applied for visual detection of NO 2 − and S 2− in real water, soil, drink and food samples, the recoveries were 97.6~104.6% and 97.5~104.1% with low detection limits of 3.26 × 10 −9 mol/L and 6.65 × 10 −8 mol/L (S/N = 3), far below the maxima in drinking water permitted by World Health Organization (WHO). The strengthened oxidase-mimic activity of CeO 2 @2D Co 3 O 4 and its different recognition mechanisms to NO 2 − and S 2− were studied in detail.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Zhengang Bu,Jianhua Li,Siqi Fang,Yuanlin Zhan,Wenzhuo He,Yibin Huang
The uniform and stable deposition of metal-organic frameworks (MOFs) onto membranes without compromising their performance presents a significant challenge. This study reports the fabrication of a photocatalytic self-cleaning membrane using hydrothermal and photochemical substitution methods. These methods enabled the uniform and stable deposition of β-FeOOH nanorods, m-MIL-100(Fe), and Ag nanoparticles (NPs) not only on the members surface but also throughout the interior of polyvinylidene fluoride (PVDF) membrane pores. The synergistic effect of these materials and their uniform and stable distribution within the PVDF membrane resulted in superior photocatalytic efficacy. The membrane's excellent photocatalytic performance facilitated the degradation of most pollutants, ensuring prolonged usage. Unlike other photocatalytic membranes requiring additional cocatalysts, our membrane degraded over 90% of various dyes without H 2 O 2 , demonstrating a greener usage mode and higher photocatalytic efficiency. The valence band (VB) and conduction band (CB) of β-FeOOH nanorods and m-MIL-100(Fe) were calculated, confirming the existence of a type-II heterojunction for the first time. Free radical trapping experiments identified hydroxyl radicals (·OH) as the primary reactive species in the degradation process. This research provides a novel approach to uniformly and stably load MOFs on membranes, enhancing their properties and offering insights into fabricating multifunctional photocatalytic membranes.
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LANGMUIR
·
2023
·
IF 3.9
Suyun Wang,Yuanbo Fang,Wuli Han,Qiang Li,Xiao Luo
For the first time, MIL-100(Fe)-derived microspheres with a hollow structure were perfectly constructed and used as a photocatalyst to decompose organic dyes under visible light irradiation. The prepared MIL-100(Fe)-NH2(20) could boost the separation, migration, and transfer of photoinduced carriers effectively, together with efficient photocatalytic performance. In simulated sunlight, the MIL-100(Fe)-NH2(20) exhibits the best degradation efficiency as well as excellent reusability and stability, and the degradation rate for rhodamine B (RhB) can be more than 99.5% within 80 minutes. Structural analysis proves that the porous MIL-100(Fe)-NH2(20) catalyst reaps an amazing hollow structure, large specific surface areas (2784.9 m2·g–1), and uniform distribution of Fe and N active phases. Besides, the enhanced visible light response and lower recombination rate of e––h+ pairs are both confirmed, and the band gap is significantly reduced to 2.53 eV. Finally, the photocatalytic mechanism and the possible degradation pathway were suggested. Owing to the enhanced photocatalytic activity, good tolerance to pH and water quality, and excellent stability, the MIL-100(Fe)-NH2(20) catalyst can be potentially used in a wide range of dye wastewater purifications.
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