TALANTA
·
2022
·
IF 6.556
Yi Wu,Keren Lu,Fubin Pei,Yanghao Yan,Shasha Feng,Qingli Hao,Mingzhu Xia,Wu Lei
The wide clinical application of d -penicillamine (D-PA) makes it inevitably accumulates in the environment, seriously threatening human health and the ecological environment. To better supervisory control D-PA, a highly sensitive and reliable photoelectrochemical (PEC) sensor based on gold nanoparticles (Au NPs) loaded on graphitic carbon nitride sheet and hexagonal NH 2 -UiO-66 composite (g-C 3 N 4 /Au/NH 2 -UiO-66) was synthesized. Tactfully using the strong bonding between D-PA and Au NPs and the effective carrier separation of Z-scheme heterojunction, the designed g-C 3 N 4 /Au/NH 2 -UiO-66 PEC sensor without an extra recognition unit exhibited a selective and sensitive photocurrent to D-PA. With the aid of UV diffuse reflectance spectra (UV-DRs), electron paramagnetic resonance (EPR) characterization, and free radical capture experiments, the electron transfer path of the PEC sensing system was deduced. The proposed g-C 3 N 4 /Au/NH 2 -UiO-66 PEC-based sensor achieved a low detection limit of 0.0046 μM (S/N = 3) with a wide linear response ranging from 10 nM to 400 μM. In addition, its good stability and selectivity also laid a good foundation for practical applications.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Rong Shang,Qizhao Zhang,Peng Lin,Bang Gu,Qinghu Tang,Qiue Cao,Wenhao Fang
Direct oxidative coupling of alcohols and amines is an environmental-benign and atomic-economy approach for imine synthesis. We disclosed that UiO-66 framework successfully confined Ru to single-atom scale with assistance of oxophilic Zn 2+ promoter. This RuZn@UiO-66 catalyst showed a highest TOF of 78 h -1 among all Ru catalysts in literature and attained > 99% yield to benzylideneaniline in the model reaction in an O 2 atmosphere at a low temperature without alkaline additives. In addition, this catalyst demonstrated satisfying gram-scale imine synthesis, wide substrate scope and stable reusability. Kinetic investigations and in situ characterizations allowed getting insights to active sites, amphoteric carrier and reaction mechanism. Dynamic interactions between Ru and Zn based on their ratios induced electron-deficient Ru 0 active sites promoted by oxophilic Zn 2+ species. Hence, primary alcohols can be efficiently converted to the corresponding aldehydes using molecular O 2 , i.e. , the rate-determining step. Besides, Zr 4+ -O 2- pairs on UiO-66 provided adequate acidic-basic sites for the tandem catalysis.
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ANALYST
·
2022
·Vol. 147
·期 17
·3867-3875
·
IF 5.227
Fangfang Yu,Yihan Wang,Tengfei Liu,Xiaohui Liu,Hui Jiang,Xuemei Wang
Hypochlorite plays a vital role in biological systems and our daily life. The rapid and convenient detection of hypochlorite is imperative and significant for disease treatment and human health. In this work, EY/UiO-66-NH2 (EY = eosin Y) was prepared through a hydrothermal process and could be applied to the detection and bioimaging of hypochlorite as a self-calibrating sensing nanoprobe. EY/UiO-66-NH2 features two emissions at 432 nm and 533 nm, and the emission intensity of 533 nm is enhanced with increasing ClO− concentration. EY/UiO-66-NH2 could be utilized as a ratiometric fluorescence sensor of ClO−. The linear range of EY/UiO-66-NH2 towards ClO− is 0.1–200 μM and its detection limit is 46.4 nM. In comparison with previously reported probes for ClO−, EY/UiO-66-NH2 has the advantages of a wide linear range, low detection limit, turn-on fluorescence and ratiometric response. This work provides a new method for ClO− detection in living cells.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Zhi-Juan Zhang,Peng-Wei Li,Lu-Ping Liu,Li-Hua Ru,Han-Xiao Tang,Wei-Sheng Feng
The analysis of breath VOC biomarkers is an efficient method for the early diagnosis of lung cancer. In this work, the zirconium UiO-66 was post-synthetically modified by using methylamine (MA), ethylenediamine (ED) and N,N′ -dimethylethylenediamine (MMEN), respectively. The modified UiO-66 materials were thoroughly characterized, including PXRD , FTIR, TGA , physical adsorption at 77 K by nitrogen and photoluminescence analysis. The sensing properties of the modified UiO-66 materials toward the selected five potential breath VOC biomarkers were investigated. Results showed that after modification, the BET surface area and total pore volume all decreased, and followed the order: UiO-66 > UiO-66-MA > UiO-66-MMEN > UiO-66-ED. Furthermore, the N–H group was successfully grafted into the modified UiO-66 samples. In comparison with UiO-66, the fluorescence intensities of UiO-66-MA, UiO-66-ED and UiO-66-MMEN toward hexanal , styrene and isoprene all obviously increased, while the fluorescence intensities of the modified UiO-66 materials toward 1-propanol and ethylbenzene all decreased a lot, accompanied by the frequency shift. In addition, the LOD of hexanal on UiO-66-MA was calculated to be as low as 12 ppm, which was obviously lower than that of UiO-66 (31 ppm). The fluorescence quenching of hexanal was mainly due to the FRET mechanism. The results of this study would provide information for the development of early breath diagnosis of lung cancer.
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 28
·期 6
·1737-1747
·
IF 2.496
Jiang Haoxi,Zhao Yingying,Lin Jing,Chen Yifei,Wang Sheng
Highly dispersed palladium nanoparticles (NPs) supported on UiO-66 as catalyst for CO 2 methanation were prepared by supercritical fluid deposition (SFD). As a result, the most suitable Pd precursor salt and co-solvent are Na 2 PdCl 4 and ethanol/DMF, respectively. The best SFD process condition to deposit the Pd precursor on UiO-66 is 40 °C, 10 MPa and 2 h. Under the above condition, 4% Pd/UiO-66 exhibits the highest activity with 53% of CO 2 conversion and 95% of CH 4 selectivity while the turnover frequency (TOF) value is 3669.4 h −1 . The catalysts were characterized by XRD, BET, TEM, XPS, TGA, CO-DRIFTS and ICP-OES to investigate the structure–activity relationship. The 4% Pd/UiO-66 with the average size of 2.2 nm of Pd prepared in assistance of supercritical fluid behaved the similar activity as the 6%Pd/UiO-66 with average size of 9.7 nm of Pd prepared by sol–gel method. It is showed prospect of technique for reducing noble metal loading resulting from high dispersion effect.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Peng Liu,Xin Li,Xuechao Xu,Xiangheng Niu,Mengzhu Wang,Hengjia Zhu,Jianming Pan
Detection of pesticide residues is important because it is related to food and environmental safety. Although lots of sensors have been developed and applied for pesticide analysis, most of them rely on the use of vulnerable bioenzymes, weakening the highlights of these sensors. Here we recommend a bioenzyme-free colorimetric assay of malathion, a typical organophosphorus pesticide, based on the analyte inducing the oxidase-mimicking activity loss of Ag 3 PO 4 /UiO-66. Compared to counterparts, the Ag 3 PO 4 /UiO-66 composite can provide enhanced oxidase-mimetic catalytic activity to trigger the 3,3′-tetramethylbenzidine chromogenic reaction with the participation of dissolved O 2 . When malathion exists, it rapidly adsorbs onto the composite surface via their unique interactions and significantly shields the oxidase-like activity of Ag 3 PO 4 /UiO-66, thus affecting the catalytic chromogenic reaction. With such a principle, sensing of malathion in a wide linear range (0.0083–5.333 μg/mL) was realized with a detection limit 7.5 ng/mL. Given no biological elements were involved in the proposed assay, it exhibited robust and reliable performance in determining malathion in practical samples. Furthermore, a chromogenic hydrogel-based smartphone sensing system was developed for instrument-free on-site analysis of malathion. With good analytical performance and facile operation, our assay and device will find promising applications in phosphothionate pesticide determination.
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高影响因子
ChemistrySelect
·
2021
·Vol. 6
·期 14
·3370-3377
·
IF 2.109
Kazem Karami,Ali Mardaniboldaji,Mohammad R. Rezayat,Parvaneh Bayat,Mohammad T Jafari
Graphical New UiO-66-NH 2 /Gly/GO nanocomposite solvothermally synthesised and characterized by techniques such as FTIR, XRD, EDAX, TGA, TEM and SEM. Nanocomposite has been exploited as an adsorbent in solid phase microextraction (SPME) method and also the pesticide chlorpyrifos as an organophosphorous pesticide is selected for the model compound. As for a determination system, Corona discharge ionization-ion mobility spectrometry (CD-IMS) has been employed. This paper seeks to produce UiO-66-NH 2 /Gly/GO nanocomposite, which is solvothermally synthesised by the “prefunctionalisation” approach using 2-aminoterephthalic acid as an organic linker in a Teflon lined autoclave and its linking to a graphene surface by glycine and finally characterized by methods such as FTIR spectrometer, Powder X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX), thermal stability measurement (TGA), transmission electron microscope (TEM), scanning electron microscope (SEM) and the Brunauer-Emmet-Teller (BET). UiO-66-NH 2 /Gly/GO nanocomposite has been exploited as an adsorbent in solid phase microextraction (SPME) method and also the pesticide chlorpyrifos as an organophosphorous pesticide is selected for the model compound. As for a determination system, Corona discharge ionization-ion mobility spectrometry (CD-IMS) has been employed. The nanocomposite capability in extracting the target analyte before and after the coating of the GO has been experimentally investigated. The IMS sensitivity has been strikingly increased in the course of using the GO as the nanocomposite coating. In order to increase the extraction efficiency and preconcentration of the analyte, both extraction temperature and time are scrutinized. All through this method, analysis factors are achieved as follows: linear dynamic range (LDR); 0.5-20.0 μg L −1 , correlation coefficient (R 2 ); 0.9992, the limit of quantification (LOQ); 0.5 μg L −1 , and limit of detection (LOD); 0.15 μg L −1 . On the whole, the proposed approach seems to be regarded as a successful method for analyzing the organophosphouros pesticide.
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 3
·1757-1768
·
IF 3.119
Yiqiu Liu,Yi Zhou,Qijun Tang,Qian Li,Si Chen,Zhuxing Sun,Haiqiang Wang
To explore an efficient photocatalyst for NO pollution, a direct Z-scheme photocatalytic system is successfully fabricated by coupling Bi2WO6 with NH2-UiO-66 via a simple hydrothermal synthesis technique. The Z-scheme system promotes the NO photocatalytic oxidation activity with an optimum NO removal rate of 79%, which is 2.7 and 1.2 times that obtained by using only pristine Bi2WO6 and NH2-UiO-66, respectively. Simultaneously, superior selectivity for converting NO to NO3−/NO2− is observed. The enhanced photocatalytic performance of the Bi2WO6/NH2-UiO-66 hybrids is attributed to the following two aspects: (i) large specific area of NH2-UiO-66, which exposes more active sites and is beneficial to the adsorption and activation of NO; (ii) outstanding Z-scheme structure constructed between BiWO6 and NH2-UiO-66, which can improve the efficiency of the separation of electron–hole pairs and preserves the strong oxidation ability of hybrids. ESR analysis shows that ·O2− and ·OH contribute to NO removal. A possible photocatalytic mechanism of NO oxidation on the direct Z-scheme photocatalyst (BWO/2NU) under visible light irradiation is proposed. This work displays the BWO/2NU hybrid's potential for treating low-concentration air pollutants, and the proposed Z-scheme photocatalyst design and promotion mechanism may inspire more rational synthesis of highly efficient photocatalysts for NO removal.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jingcheng Du,Li Chen,Xinjuan Zeng,Shuai Yu,Wei Zhou,Luxi Tan,Lichun Dong,Cailong Zhou,Jiang Cheng
UiO-66 metal–organic frameworks (MOFs) are unstable in some harsh aqueous environments, which limit their practical applications. We demonstrate a postsynthetic modification methodology to transform hydrophilic Zr(Hf)-UiO-66 into superhydrophobic Zr(Hf)-UiO-66-SH-y (SH = thiol, y = fluoroalkyl) by introducing long fluoroalkyl chains into organic linkers through a thiol–ene click reaction. Water contact angles of the four modified UiO-66 MOFs are all larger than 150°. The grafted low-surface-energy fluorine-containing groups become an effective protective shield for the MOFs, making them exhibit remarkable stability in extreme conditions such as alkaline (pH = 12), saturated HCl, and high concentration of NaCl solution (20 wt %). The Zr-UiO-66 MOFs grafted with 1H,1H,2H-perfluoro-1-hexene have high CO2 adsorption contents of 1.54 and 2.88 mmol·g–1 at 298 and 273 K, respectively. Moreover, the superhydrophobic MOFs also showed potential application in oil/water separation.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2019
·
IF 4.978
Jiling Zhao,Chen Wang,Shixing Wang,Yang Zhou
A new adsorbent (MOFs-DHAQ) was prepared by functionalizing UiO-66-NH 2 with 1,8-dihydroxyanthraquinone to remove Pb(II) from wastewater. The optimum pH, adsorption kinetics and adsorption isotherms were studied. MOFs-DHAQ has a good removal rate for Pb(III) at pH 4. It takes only 30 min to reach maximum adsorption capacity about 213.3 mg/g. The experimental data conforms to the pseudo-secondary kinetics and the Freundlich models. The adsorption process belongs to multilayer chemical adsorption . Desorption and adsorption experiments indicate that the adsorbent can be recycled at least four times. The rising temperature favors the adsorption of Pb(II) on MOFs-DHAQ because the adsorption process is a spontaneous endothermic reaction. The interaction mechanism between Pb(II) and the reactive group is mainly electrostatic interaction and complexation. MOFs-DHAQ has excellent selectivity for removing Pb(II) from wastewater contains a variety of interfering ions. The calculated adsorption capacity ( Q ex ) of Pb(II) for column adsorption was 108.04 mg/g and was consistent with the Thomas model's adsorption capacity( Q Th ) about 109.63mg/g. Density functional theory calculations show that MOFs-DHAQ combines with Pb(II) through monodentate N atoms and bidentate O groups. MOFs-DHAQ has good application prospect in the removal of lead from wastewater.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Si-Yuan Fang,Peng Zhang,Ji-Lai Gong,Lin Tang,Guang-Ming Zeng,Biao Song,Wei-Cheng Cao,Juan Li,Jun Ye
Metal-organic frameworks (MOFs) materials show great potential in wastewater separation applications. In this study, zirconium-based MOFs (UiO-66) were prepared and constructed universal, high-performance, and flexible nanofiltration (NF) membrane for various dyes and antibiotics separation. The substrate was constructed by two-steps, a) doping graphene oxide (GO) sheets into the membrane casting solution containing polyacrylonitrile (PAN) and forming 2D-3D connecting pores by phase immersion conversion method (defined as GO@PAN), b) immersing the GO@PAN substrate into dopamine solution to self-polymerize into chain macromolecules, which obtaining good compatible and flexible substrate (defined as PGP). Moreover, the UiO-66 was synthesized via solvothermal method and subsequently coated onto the PGP substrate by vacuum-assisted filtration. Benefiting from the water stability, porous structure, and negative charge of UiO-66, the outstanding filtration performance of the UiO-66/PGP thin-film composite (TFC) membrane was achieved. The pure water permeability of the UiO-66/PGP TFC membrane was 31.33 ± 0.75 L m −2 h −1 bar −1 , and the rejection rates for dye (Congo red, Methyl orange, Rhodamine B, and Methylene blue) and antibiotic (Tetracycline hydrochloride, Oxytetracycline, and Ciprofloxacin) were above 94%. Therefore, we further explored the retention mechanism of the UiO-66/PGP TFC membrane for dye and antibiotic separation (size exclusion and electrostatic interaction). More importantly, antifouling properties and long-time stability of the UiO-66/PGP TFC membrane were also evaluated. These results indicated that the prepared UiO-66/PGP TFC membrane is promising for wastewater treatment, separation, and purification in many industrial and pharmaceutical fields.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Guiliang Zhu,Sheng Feng,Jianying Chao,Wei Zheng,Cong Shao
A simple one-pot method was employed to synthesize C-dots modified TiO 2 nanosheets (NS)/UiO-66-NH 2 for enhancing photocatalytic activity. Anatase TiO 2 NS and UiO-66-NH 2 were closely combined and C-dots were well modified on their surfaces. The photocatalytic activities of catalysts were assessed through photodegrading ketoprofen (10 mg/L) under visible light. C-dots/TiO 2 NS/UiO-66-NH 2 degraded 90% of ketoprofen in 80 min, and owned the higher kinetic rate than TiO 2 NS (24 times) or TiO 2 NS/UiO-66-NH 2 (2.1 times). The results indicated that C-dots/TiO 2 NS/UiO-66-NH 2 exhibited the most superb visible-light photocatalytic activity. Besides, C-dots/TiO 2 NS/UiO-66-NH 2 showed good stability and reusability in four runs of degrading ketoprofen. The improved photocatalytic performance was caused by the heterostructure of TiO 2 NS and UiO-66-NH 2 and photoelectrical performance of C-dots, effectively absorbing visible light and promoting photoelectrons transfer.
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