FOOD CHEMISTRY
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2021
·
IF 7.514
Manlu Wang,Juan He,Jin Luo,Jing Hu,Xiandeng Hou
The determination of inorganic arsenic species in real samples can be particularly challenging due to their trace levels and the interferences arising from sample matrix. Normally, the speciation analysis necessitates chromatographic separation. Herein, we report a novel method for the ultrasensitive detection and non-chromatographic speciation of inorganic arsenic by inductively coupled plasma mass spectrometry (ICP-MS), utilizing CdS/MIL-100(Fe) composites as an adsorbent and photocatalyst. The synthesized CdS/MIL-100(Fe) could completely adsorb As(V) and As(III) within 5 and 105 min, respectively. Following filtration and re-suspension in formic acid, the adsorbed As(III)/As(V) were reduced to arsine (AsH 3 ) under UV irradiation and swept to ICP-MS for detection. The limits of detection were found to be 1.7 ng L −1 (without preconcentration) and 0.11 ng L −1 (after 20-fold preconcentration). The method was successfully applied to the determination of trace inorganic arsenic in various food and water samples.
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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 COLLOID AND INTERFACE SCIENCE
·
2026
·
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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MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Li Yang,Shuang Wang,Zhongshui Xie,Rongrong Xing,Runqin Wang,Xuan Chen,Shuang Hu
A novel deep eutectic solvent - loaded magnetic solid phase extraction (DES-L-MSPE) method was proposed, which was based on the direct loading of a hydrophobic DES composed of L-menthol and lactic acid (1:2) into the pores of core–shell magnetic Fe 3 O 4 @MIL-101(Cr) nanoparticles. The function of DES was to condition the Fe 3 O 4 @MIL-101(Cr) and promote liquid phase microextraction for the analytes. Through coupling with HPLC-UV analysis, this method was utilized for the determination of six non-steroidal anti-inflammatory drugs (NSAIDs), including ketoprofen, naproxen, flurbiprofen, diclofenac sodium, ibuprofen, and mefenamic acid in environmental water samples. The influencing parameters such as type and ratio of DES, amount of adsorbent, sample solution pH, salt concentration, extraction time, elution solvent and time were investigated and optimized in detail. Under the optimal conditions, the method exhibited good linearity (5.0–1000 μg/L for ketoprofen, ibuprofen, 1.5–600 μg/L for flurbiprofen, mefenamic acid, 2.5–1000 μg/L for naproxen and 3.0–600 μg/L for diclofenac sodium with the correlation coefficients ranging from 0.9972 to 0.9993), low limits of detection (0.20–1.1 μg/L), and high precision (RSD < 8.2 %). Besides, the recoveries in spiked lake and river water samples were 89.8 %–110.4 % and 83.8 %–109.0 %, respectively. Taken together, the established method was proved to be simple, fast, highly sensitive and accurate for the determination of NSAIDs from aqueous matrices.
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BIOMEDICAL CHROMATOGRAPHY
·
2022
·Vol. 36
·期 11
·e5454
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IF 1.911
Yong Zhang,Kaifang Wei,Litao Wang,Guihua Gao
In this work, MIL-53(Al), as an inorganic “filler” component, was embedded in polyvinylidene difluoride (PVDF) and polystyrene-block-polybutadiene (SBS) matrices to prepare two mixed-matrix membranes (MMMs), using a simpler method than that previously reported. The PVDF and SBS membranes retained much of the properties of PVDF, SBS, and native MIL-53(Al). The prepared MMMs were then placed in a vortex-stirred sample solution to develop a membrane solid-phase extraction method to extract estrogens and parabens, which were determined by high-performance liquid chromatography with fluorescence detection. The extraction efficiencies of the two membranes were compared, with the PVDF membrane exhibiting superior performance. In addition, the PVDF membrane was more freestanding and flexible, and its preparation method was also more facile and simple. The extraction conditions were optimized, and the analytical method showed low limits of detection (0.005–0.18 ng/mL), good linearity, and high accuracy, with recoveries ranging from 90.7% to 102.5%. As a result, this membrane solid-phase extraction method indicated its potential for application in aqueous sample pretreatment. For metal–organic framework–based MMM used in this method, in addition to being durable, freestanding, mechanically stable, and possessing a large area, it should also exhibit high metal–organic framework incorporation, good flexibility, and appropriate thickness and weight.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yuanhong Xie,Chenrui Liu,Dejian Li,Yun Liu
Herein, a novel composite of MIL-101(Fe) loaded with nitrogen doped carbon quantum dots (NCQDs/MIL-101(Fe), denoted as NQML), which can construct dual effect of photocatalysis and photo-Fenton for organic pollutants removal, was prepared by solvent impregnation method. Characterization methods proved that NQML had been synthesized successfully. Additionally, the adding volume of NCQDs could effectively influence the photocatalytic activities of NQML-x composites (x represents the adding volume of NCQDs) for tetracycline (TC) degradation, and NQML-8 exhibited the optimum photocatalytic performance among the studied catalysts upon visible light illumination under natural pH, which can completely degrade TC within 180 min. By comparison, the TC degradation kinetic constant in the system with NQML-8 was as 15.85 and 8.24 folds of that in the NCQDs and MIL-101(Fe) systems, respectively. The mechanism study proved that the enhanced photocatalytic performance of NQML was resulted from the visible light up-conversion property, electron-hole separation and transfer capacity of NCQDs. Meanwhile, NQML could not only produce h + but also lead to in-situ generation of O 2 - and H 2 O 2 by activation of O 2 under visible light. The generated H 2 O 2 could react with Fe(II) in MIL-101(Fe) to produce OH so as to construct a dual effect of photocatalysis and photo-Fenton in TC removal.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 26
·68691-68700
·
IF 5.8
Liu Yuhao,Wang Jieqi,Wang Xuyi,Chen Jiayue,Zhang Beibo,Chen Liping,Zheng Dan,Cheng Ming
It is a great challenge to develop photocatalysts for the degradation of organic pollutants in the aqueous environment, especially those with excellent catalytic performance under visible light conditions. In this work, using graphene oxide (GO) as an electron shuttle agent and carrier, a hybrid of ZIF-8/NH 2 -MIL-125(Ti) and GO (ZIF-8/NH 2 -MIL-125(Ti)/GO) was prepared by a simple two-step solvothermal method. The morphology, structure, and combination of the synthesized catalysts were studied. The results showed that graphene oxide and ZIF-8 formed an in situ load on NH 2 -MIL-125(Ti). The construction of hybrid materials significantly improved the catalytic activity of NH 2 -MIL-125(Ti) in the visible light range. The degradation activity of the synthesized catalyst was further tested with reactive red dye. The results showed that the catalyst exhibited excellent catalytic removal efficiency for active red, with a degradation rate of 99.8% within 2 h. The prepared hybrid materials have good application prospects in the field of organic pollutant treatment in water. Graphical Abstract
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Shiyu Zhang,Meng Du,Zipeng Xing,Zhenzi Li,Kai Pan,Wei Zhou
Defective-rich and electron-rich mesoporous NH 2 -MIL-125(Ti)@ZnIn 2 S 4 /CdS hierarchical tandem heterojunctions were fabricated through two-step solvothermal and one-step hydrothermal strategies. The interface with electron enrichment can cause active interface reaction, fast transfer and separation of charge carriers and restrain the photocorrosion of CdS. ZnIn 2 S 4 , as a bridge to connect Ti-MOFs and CdS, favors the separation of charge carriers and forms tandem heterojunctions. The as-prepared photocatalyst has a relative large surface area of ∼877.0 m 2 g −1 and a narrow band gap of ∼1.84 eV, which could absorb visible light efficiently. Furthermore, it exhibits a high photocatalytic hydrogen generation rate which was increased to 2.367 mmol g −1 h −1 and the high photocatalytic degradation efficiency for 2,6-dichlorophen and 2,4,5-trichlorophenol which were 98.6% and 97.5%, respectively. Additionally, recycling text for several cycles indicates the high stability. This novel Ti-MOFs based core@shell hierarchical tandem heterojunctions may offer a new insight for fabricating high-performance heterojunctions for multi-channel charges transfer.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Guojun Li,Zheng Lian,Qiuqiu Lyu,Chenyu Zhu,Zhinian Liu,Shule Zhang,Qin Zhong
The efficiency of photocatalytic Nitric Oxide(NO) oxidation is limited by the lack of oxygen(O 2 ) active sites and poor charge carrier separation. To address this challenge, we developed a molecular Cobalt Phthalocyanine modified MIL-68(In)–NH 2 photocatalyst with a robust Built-in electric field(BIEF). In the 2 % CoPc-MIN sample, the BIEF strength is increased by 3.54 times and 5.83 times compared to pristine CoPc and MIL-68(In)–NH 2 , respectively. This BIEF facilitates the efficient S-scheme charge transfer, thereby enhancing photogenerated carrier separation. Additionally, the Co-N4(II) sites in CoPc can effectively trap the separated photoexcited electrons in the S-scheme system. In addition, the Co-N4(II) sites can also serve as active sites for O 2 adsorption and activation, promoting the generation of superoxide radical ( O 2 – ), thereby driving the direct conversion of NO to nitrate(NO 3 – ). Consequently, the 2 % CoPc-MIN sample exhibits a remarkable photocatalytic NO removal efficiency of 79.37 % while effectively suppressing the formation of harmful by-product nitrogen dioxide(NO 2 ) to below 3.5 ppb. This study provides a feasible strategy for designing high-efficiency O 2 activation photocatalysts for NO oxidation.
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MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 9
·3121-3130
·
IF 4.58
Yuan Guolin,Wang Lei,Mao Dayong,Wang Fang,Zhang Jicai
The β1 receptor blocker metoprolol targets the hypertension-carrying adrenergic receptor gene (ADRB1), but therapy is often hindered by a lack of evidence-based medical information. The authors describe an assay for the ADRB1 gene. It is based on the electrocatalytic oxidation of H 2 O 2 by a nanocomposite consisting of hemin and platinum nanoparticles in an amino-modified metal-organic framework of the type Fe-MIL-88-NH 2 and heavily loaded with Cu(II) ions. The nanocomposite was placed on a glassy carbon electrode (GCE), and the resulting sensor displays increased electrocatalytic activity with the addition of H 2 O 2 because of the synergistic effects of hemin and the platinum nanoparticles (Pt NPs). Next, a capture DNA probe for the target ADRB1 gene was immobilized on the modified GCE. Binding of the target gene results in a distinct change in the electrocatalytic activity of H 2 O 2 . The amperometric i–t curves were recorded at −0.4 V in 5 mL of phosphate buffered saline at room temperature. The electrode responds to ADRB1 in the 1 f. to 10 nM concentration range and has a 0.21 f. detection limit (at a S/N ratio of 3). In our perception, this detection scheme can simplify and accelerate the identification of drug response and therapeutic efficacy. Conceivably, it may be applied to other mutations, and it may enable a more precise clinical prognosis and thus facilitate personalized medical diagnostics.
Schematic presentation of an electrode for the determination of the adrenergic receptor gene (ADRB1). The assay is based on the electrooxidation of added H 2 O 2 by using a glassy carbon electrode (GCE) coated with a composite prepared from platinum nanoparticles (Pt NPs), hemin and a metal-organic framewok of type Fe-MIL-88NH 2 loaded with Cu(II). This versatile platform simplifies studies on the response of hypertension drugs and the effectiveness of therapy.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Zhujun Huang,Zhan Lai,Dongying Zhu,Haiyan Wang,Chenxi Zhao,Guihua Ruan,Fuyou Du
The electrospun graphene oxide/MIL-101(Fe)/poly(acrylonitrile- co -maleic acid) nanofibers (E-spun GO/MIL-101(Fe)/PANCMA NFs) were fabricated by a facile electrospinning method and used as integrated photocatalytic adsorbents (IPAs) to remove dye pollutant from water samples. Compared with E-spun GO/PANCMA and E-spun MIL-101(Fe)/PANCMA NFs, the fabricated E-spun GO/MIL-101(Fe)/PANCMA NFs exhibited higher adsorption ability and excellent photocatalytic activity towards a model pollutant Rhodamine B (RhB). Under the optimized conditions, the as-prepared IPAs achieved almost complete adsorption of RhB within 15 min with the maximum adsorption capacity of 10.46 mg/g. Under visible-light irradiation, 93.7% of RhB in 20 mL water sample was degraded within 20 min, and the degradation kinetics of RhB fitted well with the first-order kinetic model. In addition, LC-MS analysis of the RhB degradation products confirmed the degradation pathways, and the generated •OH radicals played important roles in the degradation process. Importantly, the E-spun GO/MIL-101(Fe)/PANCMA NFs exhibited good reusability and could be reused for consecutive 20 cycles, which make them promising candidate materials in the field of industrial applications and environmental remediation.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2018
·
IF 3.649
Tongtong Wang,Xuedan Song,Qunxing Luo,Xiaodong Yang,Siying Chong,Jie Zhang,Min Ji
In terms of ‘green chemistry’ and ‘atom economy’, the cycloaddition of CO 2 to yield cyclic carbonate without any additive is an eco-friendly way to utilize CO 2 . Unfortunately, the low CO 2 capture quantity of common catalysts limited its catalytic efficiency. Herein, a novel acid-base bifunctional catalyst was successfully prepared by immobilizing ionic liquid on MIL-101-NH 2 (IL/MIL-101-NH 2 ) and tested for propylene carbonate (PC) rapid and facile synthesis from CO 2 and propylene oxide (PO). The synergetic interaction between Lewis base with strong CO 2 chemical capture capacity and Brønsted acid with strong hydrogen bond donor leads to the high catalytic efficiency of IL/MIL-101-NH 2 for carbonate synthesis from CO 2 and PO without any additive. The immobilization mode between MIL-101-NH 2 and IL is energetically supported by the density functional theory (DFT) calculations. This design idea of specific catalyst and the acid-base synergetic strategy provides new insights into the design of powerful catalyst systems for the CO 2 conversion.
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