NANO
·
2016
·
IF 0.951
Jimin Du,Huiming Wang,Huijuan Chen,Menghe Yang,Xiaoling Lu,Hui Guo,Zhanmin Zhang,Tianwei Shang,Shujue Xu,Wenqi Li,Pianpian Wang,Imran Shakir
Black Porous Zr-doped TiO 2 monoliths were successfully synthesized by a combined route including sol–gel method with polystyrene spheres as template followed by calcination at high temperature in the presence of oxygen. As-synthesized samples were then treated in hydrogen atmosphere at 500 ∘ C for 6 h to obtain black Porous Zr-doped TiO 2 monoliths. This as-synthesized black porous Zr-doped TiO 2 composite showed relatively narrow bandgap compared to the pure anatase phase of TiO 2 , which may have its origin from the contributions from the Zr impurity and oxygen vacancies. The photocatalytic activity of the black porous Zr-doped TiO 2 monolith was examined by carrying out the dye degradation on Rhodamine B under visible irradiation. Our experimental results indicate that black porous 0.9% Zr-doped TiO 2 sample exhibits high photocatalytic activity with the photodecomposition of 95.25% under visible irradiation for 120 min.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Analytical Methods
·
2018
·Vol. 11
·期 1
·36-43
·
IF 2.073
Shun-Hua Wu,Shu Wang,Wen-Le Fang,Xiao-Feng Guo,Hong Wang
In this study, we synthesized metal–organic frameworks (MOFs) UiO-67-bpydc using H2bpydc as ligands and Zr6 clusters as vertexes. Due to the protonation of the bipyridine group, UiO-67-bpydc shows pH-dependent fluorescence (365 nm/530 nm) in the pH range from 1 to 9, which shows its feasibility as a wide-range pH sensor. Further study indicated that UiO-67-bpydc exhibits stability, reusability, selectivity and has an excellent linear relationship in the pH range 4.0–6.5, and the mechanism of the UiO-67-bpydc fluorescence intensity with the variation of pH has been studied in detail. This MOF-based fluorescent sensor has been applied to specifically detect the pH of solutions in the presence of the body fluid matrix. Compared with reported pH-MOF sensors, UiO-67-bpydc can be practically applied in real samples and is easily prepared with excellent stability in different buffer solutions.
研究领域:
材料科学
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分析化学
·
生物医学
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产品关联
DOI
高影响因子
FOOD AND CHEMICAL TOXICOLOGY
·
2022
·
IF 5.572
Ruijuan Lv,Ruimeng Sun,Ting Du,Yuhan Li,Lixia Chen,Yang Zhang,Yanfei Qi
A sensitive electrochemical sensor for sunset yellow (SY) was constructed based on cetyltrimethylammonium bromide (CTAB) functionalized graphene (Gr) and Cu/Zr-MOF electrode modified materials. The CTAB-Gr-Cu/Zr-MOF composites were synthesized by using a mild method and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and EDX spectrum. The combination of Cu/Zr-MOF and graphene exhibited synergetic effect of the strong accumulation efficiency, fast electron transfer rate and more sensing sites towards the oxidation of SY. The new modified materials remarkably increased the electrochemical response of SY to 6.53-fold when comparing with bare electrode. Under the optimized conditions, the oxidation peak currents of SY had a linear relationship with its concentration in a wide range from 0.10 to 8.00 μM and 40.00–1000.00 μM, and the limit of detection was 6.68 nM (S/N = 3). The electrochemical method shows high sensitivity, stability, reproducibility and is successfully applied in the determination of SY in soft drinks.
研究领域:
分析化学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Fuhua Wei,Haiyan Liu,Qinhui Ren,Lu Yang,Lan Qin,Hongliang Chen,Yufu Ma,Zhao Liang,Siyuan Wang
Zr-MOF was prepared under solvothermal conditions using zirconium acetate as the metal ion and 2,5-dihydroxyterephthalic acid as the organic ligand. It was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetry (TG). Zr-MOF was used as an adsorbent to remove norfloxacin from aqueous solutions. The experimental results were fitted, and the results showed that the pseudo-second-order kinetics model was appropriate for studying the removal of norfloxacin. We investigated the adsorption capacity of Zr-MOF under different masses, concentrations, and pH values. At pH 10, the maximum adsorption capacity after 5 h was 134.5 mg/g.Compared with another adsorbent,the adsorption capacity of Zr-MOF was higher.The removal of norfloxacin from an aqueous solution using Zr-MOF was feasible, inexpensive, and effective. Our findings indicate that Zr-MOF has broad application prospects for the purification of an aqueous solution.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APL Materials
·
2024
·Vol. 12
·期 4
·
IF 5.3
Lin Jia,Wang Shuai,Jin Hua,Cui Shuyuan,Wang Rongwen,Yang Yihang,Huang Guimei,Wang Jinhuo
The preparation of ceramic materials with complex porous structures through photopolymerization-based 3D printing requires the development of stable and printable slurries. In this study, zirconium acetylacetonate was incorporated into the thiol vinyl organosilicon prepolymer to create a photosensitive Si–Zr–O–C slurry. Regarding the natural bone structures and the Tyson polygon principle, a gradient pore structure was designed and then printed using a digital light processing 3D printer. After printing, the effects of sintering temperatures on the phase composition and structure of Si–Zr–O–C ceramics were systematically investigated. Subsequently, a comparative analysis of structure and properties was performed on sintered samples with different zirconium acetylacetonate contents. The results revealed that the sample containing 30 wt. % zirconium acetylacetonate exhibited a higher compressive strength of 9.70 ± 0.28 MPa and a lower room temperature thermal conductivity of 0.528 W m −1 K −1 . This study confirmed the significant potential of using 3D printing technology to prepare Si–Zr–O–C precursor ceramics with a porous structure.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiao Wang,Kexin Liu,Lei Shi,Jinshan Xie,Manman Zhao,Wulong Li,Zhanxiong Li
Metal-organic frameworks (MOFs) have exhibited great potential in various adsorption and separation fields, such as the adsorption of metal ions, separation of organic pollutants, and recovery of precious metals from aqueous-based matrices. Here, we prepared a series of sulfur-doping Zr-MOF-fabric composites by in-situ growth of zirconium metal ions with sulfur-containing organic ligands on the surface of carboxylated fabrics (CF-Ph-COOH). The formic acid (FA) regulated mercaptosuccinic acid (MSA) and 2,2’-dithiobisbenzoic acid (DTSA) Zr-MOF-fabric (CF-Zr-MSA-FA and CF-Zr-DTSA-FA) composites exhibit excellent Au 3 + adsorption from water with saturated adsorption capacities of 141.15 mg/g and 169.28 mg/g, respectively, and showing over 90 % adsorption removal rate in the pH range of 2–6, especially for CF-Zr-DTSA-FA could maintain more than 99.99 %. Most strikingly, the prepared MOF-fabric composites display excellent selective adsorption for Au 3+ in mixed solutions, and the selective adsorption efficiency of CF-Zr-MSA-FA and CF-Zr-DTSA-FA was up to 95.69 % and 85.37 %, respectively. Finally, the prepared MOF-fabric composites can be reused as filtering membrane for gold recovery, which also could provide a facile strategy to recover gold from water, and extending the practical applications of MOFs textile composite.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 10
·5702-5711
·
IF 10.733
Yawei Wang,Shu Jin,Guoxiang Pan,Zuxin Li,Long Chen,Gang Liu,Xiaoxiang Xu
In spite of strong visible light absorption and ideal band edge positions, LaTaON2 normally has very poor photocatalytic activity under ordinary conditions. Previous modifications of LaTaON2 such as aliovalent doping generally lead to strong reduction of its visible light absorption, being unfavorable for solar energy harvesting. Here, we introduce Zr into the structure of LaTaON2 (i.e. LaTa1−xZrxO1+yN2−y (0 ≤ x ≤ 0.15)) and successfully improve its photocatalytic activities without sacrificing its light absorption capability. More importantly, Zr doping helps to reduce Ta4+ defect concentration, improve surface hydrophilicity and induce mesoporous microstructures in LaTaON2, all of which contribute to the superior photocatalytic activities for water splitting reactions. Apparent quantum efficiency as high as 0.93% at 420 ± 20 nm has been achieved on LaTa0.9Zr0.1O1+yN2−y (x = 0.10) for photocatalytic water oxidation reactions, being the highest AQE reported for LaTaON2 to date. Further photoelectrochemical analysis suggests that Zr doped LaTaON2 has better charge separation conditions, smaller interfacial charge transfer resistance and longer electron lifetime compared to pristine LaTaON2. This simple method using Zr as a dopant can be well extended to other perovskite oxynitrides.
研究领域:
材料科学
·
光催化
·
能源化学
·
无机功能材料
·
半导体光化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 4
·279
·
IF 4.3
Yuning Li,Xinya Wang,Weiqiu Huang,Xufei Li,Ping Xia,Xiaochi Xu,Fangrui Feng
Membrane technology has been widely used in industrial CO2capturing, gas purification and gas separation, arousing attention due to its advantages of high efficiency, energy saving and environmental protection. In the context of reducing global carbon emissions and combating climate change, it is particularly important to capture and separate greenhouse gasses such as CO2. Zr-MOF can be used as a multi-dimensional modification on the polymer membrane to prepare self-assembled MOF-based mixed matrix membranes (MMMs), aiming at the problem of weak adhesion or bonding force between the separation layer and the porous carrier. When defective UiO-66 is applied to PVDF membrane as a functional layer, the CO2separation performance of the PVDF membrane is significantly improved. TUT-UiO-3-TTN@PVDF has a CO2permeation flux of 14,294 GPU and a selectivity of 27 for CO2/N2and 18 for CO2/CH4, respectively. The CO2permeability and selectivity of the membrane exhibited change after 40 h of continuous operation, significantly improving the gas separation performance and showing exceptional stability for large-scale applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 65
·37733-37738
·
IF 3.049
Yanghe Fu,Jieyu Wu,Rongfei Du,Ke Guo,Rui Ma,Fumin Zhang,Weidong Zhu,Maohong Fan
Defect engineering can be a promising approach to improve the photocatalytic performance of metal–organic frameworks (MOFs). Herein, a series of defective NH2-UiO-66(Zr) materials were synthesized via simply controlling the synthesis temperature, with concentrated HCl as the modulator and then these as-prepared samples were used to systematically investigate the effects of their structural defects on photocatalytic CO2 reduction. Remarkably, these MOFs with defects exhibit significantly enhanced activities in photocatalytic CO2 reduction, compared with the material without defects. The defect engineering creates active binding sites and more open frameworks in the MOF, and thus facilitates the photo-induced charge transfer and restrains the recombination of photo-generated charges efficiently. The current work provides an instructive approach to improve the photocatalytic efficiency by taking advantage of the structural defects in MOFs, and could also inspire more work on the design of advanced defective MOFs.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2017
·
IF 4.601
Xiaotian Zhang,Pengcheng Huang,Aili Liu,Mingyuan Zhu
Owing to the high prices and other shortcomings associated with the existing methods of complex catalyst preparation, we used the UIO-66(Zr) metal–organic frameworks to directly catalyze the oxidative desulfurization (ODS) reaction. The synthesized UIO-66(Zr) was characterized using nitrogen adsorption–desorption isotherm analysis, X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. Under optimal reaction conditions, the ODS conversion of dibenzothiophene (DBT) reached 100%. This excellent catalytic activity was attributed to the unsaturated coordination of Zr, which may produce beneficial Lewis acid sites.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Xiaoya Ji,Jinhai Yang,Ning Zhao,Feng Wang,Fukui Xiao
Zn/Zr mixed oxide catalysts with different Zn-Zr molar ratios were prepared by coprecipitation method, and their catalytic performance for synthesis of ethylene carbonate (EC) from ethylene glycol and urea were investigated. The catalysts were also characterized by XRD, FT-IR, XPS, Raman, SEM, HRTEM and CO 2 -TPD. Compared with ZnO, Zn/Zr mixed oxide has suitable basicity and low lattice oxygen binding energy. The catalyst with Zn/Zr ratio of 5:1 showed the highest catalytic activity in the reaction with the EC yield of 91%. The results revealed that the yield of EC was closely related to the amount of the basic sites on the catalyst surface. Based on the characterization results, a possible mechanism was proposed.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Qipeng Yang,Ru Song,Yameng Wang,Xianlong Hu,Zhiyue Chen,Zhuo Li,Weiqiang Tan
A new electrode material consisting of MOFs (Zr-TAA, TAA: trans-aconitic acid) and MWCNTs was simply synthesized by one-pot reflux method and applied to high-performance supercapacitor. With advantages of improved conductivity and uniform pore-size distribution, the composite material shows enhanced electrochemical performance with a specific capacitance of 562.06 F g −1 and retains almost 100% of its initial capacitance after 1000 cycles when measured in 6 M KOH electrolyte. Furthermore, an asymmetric supercapacitor assembled by Zr-TAA/MWCNTs-6 as positive electrode and carbon cloth as negative electrode exhibits a superior energy density of 17.53 Wh kg −1 at a power density of 902.5 W kg −1 , which demonstrates its great practical value in electrochemical energy storage applications.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）