NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Dan Wang,Wenjing Cai,Qiuxiang Feng,Feng Cao,Qianli Zhang,Qiang Xu,Li Li,Jie Liu
To develop porous solid-state materials for effective capture of radioactive iodine in both vapor and solution phases is of great importance. In this work, a Zr/Ti-based bimetallic metal-organic framework (AO-UiO-66-ZrTi11) was synthesized via a simple solvothermal method using 2, 5-bis (allyloxy)terephthalic acid, ZrCl4 and Cp2TiCl2. This MOF solid was fully characterized and extensively evaluated for its I2 capturing performance. AO-UiO-66-ZrTi11 demonstrated significantly enhanced I2 uptake capacity, achieving as high as 2.46 g·g-1 for iodine vapor and 1084.4 mg·g-1 for iodine/cyclohexane solution. Kinetic studies of iodine adsorption from solution revealed rapid kinetics, with the process fitting well to the pseudo-second order kinetic model. The superior adsorption performance of AO-UiO-66-ZrTi11 for iodine can be attributed to its unique bimetallic structural features and functional groups. This work provides valuable insights for the further development of efficient adsorbents towards capturing radioactive iodine.
研究领域:
材料科学
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核化学与放射化学
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环境科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Yue Yin,Ruolin Lv,Xiaoyang Li,Lu Lv,Weiming Zhang
Bimetallic Fenton catalyst has attracted widespread attention in refractory organics removal. Herein, we firstly investigated the influence of ZrO 2 structure features on H 2 O 2 activation in Zr-Fe bimetallic catalyst. The results show that the heterojunction structure will be formed after high temperature calcination , which makes the ability of Zr-Fe bimetallic catalyst to activate H 2 O 2 for bisphenol A degradation is 3.1 times higher than that of α-Fe 2 O 3 without Zr doping. Through characterization and density functional theory, it was identified that compared to (1 1 0) interface, the adsorption energy of H 2 O 2 on iron sites at (1 1 0)-(1 0 0) interface reduced by 1.27 kJ mol −1 , while the Fe–O bond length in the stable configuration of Fe-OOH increased by 0.16 Å, which was beneficial to the association and dissociation of H 2 O 2 on iron sites. Besides, the surface -OH of amorphous ZrO 2 in Zr-Fe bimetallic catalyst synthesized under low temperature conditions could promote HO 2 • /O 2 •- formation through the surface electron transfer, accelerating the Fe(III) reduction. In conclusion, this study reveals the influence of environment-friendly ZrO 2 structure features on H 2 O 2 activation, proposes a new insight into strengthening the synergistic effect between bimetals, and provides a reference for the structural optimization of bimetallic catalysts.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Bohao Yang,Mingbo Shi,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
The treatment of oil spill and the separation of oil-water mixture have been widely concerned in recent years. In this work, a one-pot synthesis strategy is developed to prepare fluorine functionalized zirconium-based metal organic framework (Zr-MOFs) (denoted as UiO-66-1F) by using 4-fluorobenzoic acid as modulator and modifier and p-phthalic acid (PTA) as ligand. 4-fluorobenzoic acid can participate in the formation of frameworks structure and cause structural defects, causing larger surface area and hierarchically porous structure. The hydrophobicity of UiO-66-1F increases with increasing of the ratio of 4-fluorobenzoic acid to zirconium chloride and when the ratio is 10, the synthesized UiO-66-1F(10) shows high hydrophobicity with a water contact angle (WCA) of 122° while the WCA of original UiO-66 is only 21°. UiO-66-1F(10) also has good chemical stability over a wide pH range (pH 1∼11) and good hydrothermal stability. In addition, a superhydrophobic sponge (UiO-66-1F(10)@PDA@sponge) with a WCA of 150° was prepared via in situ growth of UiO-66-1F(10) on a polydopamine modified sponge (PDA@sponge). The resulting composite shows high absorption capacities for various oils and organic solvents ranging from 50.5 g/g (n-hexane)– 107.8 g/g (dichloromethane) and good recyclability.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2023
·Vol. 98
·期 7
·1620-1630
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IF 3.4
Minhua Zhang,Yan Zhang,Yuxin Tan,Guochao Yang,Haoxi Jiang,Lingtao Wang
BACKGROUND With the improvements in bioethanol production, the process of converting ethanol to 1,3-butadiene (ETB) has received substantial scholarly attention, whose industrialization has been constrained by the stability of the catalysts. RESULTS In this work, the deactivation behavior of Zr- β zeolite in the process of ethanol/acetaldehyde conversion to 1,3-butadiene was investigated. In addition, the deactivation kinetics of ETB was studied using an isothermal differential microreactor. A kinetic model was developed and parametrized with the Langmuir–Hinshelwood mechanism, and the intrinsic kinetic equation was derived. The deactivation kinetic model of the ETB reaction was established from the active site content of the catalyst as a function of time on stream. The validity of the kinetic model was tested, and the results were found to be accurate. CONCLUSIONS Catalyst deactivation was mainly caused by coke species, which are mainly long-chain unsaturated oxygenated organic compounds and aromatic compounds, covering Lewis acid sites in the microporous channels of the catalyst; nevertheless the zeotype topology and morphology were not destroyed. The kinetic data suggested that the reaction was of first order and the activation energy of the deactivation process was 75.59 kJ mol −1 . © 2023 Society of Chemical Industry (SCI).
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
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2022
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IF 11.072
Jie Chen,Jianzhong Ma,Qianqian Fan,Wenbo Zhang
Chrome-free tanning agent is of great significance because it can eliminate the notable environmental pollution of chrome tanning. Metal-organic frameworks (MOFs) are the products of the desired combination of metal ions and organic ligands, which make them the born self-masking tanning agent. Herein, a series of Zr-MOFs were prepared by a solvothermal method, and then applied in leather tanning process. Among the Zr-MOFs family, UiO-66 tanned leather exhibited the highest shrinkage temperature ( T s ) of 75.3 °C. Meanwhile, the smaller particle size and self-masking structure of Zr-MOFs allowed for the uniform distribution in collagen fibers matrix, thus giving improved physical-mechanical and organoleptic properties . It was noted that 80% metal usage reduced could be achieved with Zr-MOF as tanning agent comparing with conventional zirconium sulfate. It was found that Zr 4+ of Zr-MOFs could mainly coordinate with -COOH and -NH 2 groups in collagen fibers to form a stable cross-linked structure. In addition, the BOD 5 /COD value (>0.3) of Zr-MOF tanning waste liquor indicated good biodegradability , further confirming the eco-friendly metal-less tanning process. All results indicate that the proposed Zr-MOFs will promote the eco-friendly metal-less tanning process and open a new chapter for the chrome-free tannage.
研究领域:
皮革化学与工程
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环境科学
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DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 16
·e202300902
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IF 2.1
Panli Liu,Shengbin Shi,Ruiping Wei,Lijing Gao,Jin Zhang,Guomin Xiao
Graphical P-Zr-SBA-15 catalyst with bifunctional acidity was synthesized by introducing Zr 4+ into the mesoporous material SBA-15 structure for intra skeleton modification, and then impregnated with phosphoric acid solution to modify the outer skeleton. The catalyst exhibits excellent catalytic activity, good thermal stability, and recoverability in the preparation of furfural. A series of bifunctional P-Zr-SBA-15 catalysts with Lewis acid and Brønsted acid sites were prepared by modifying mesoporous material SBA-15 with Zr 4+ and phosphate group, which were used in the conversion of xylose and xylan into furfural. The structure and acidic characteristics of the catalyst were analyzed by X-ray diffraction, Fourier transform infrared spectroscopy, N 2 adsorption desorption, scanning/transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, NH 3 temperature programmed desorption, and pyridine adsorption infrared spectroscopy. The effects of different process parameters on the catalytic performance of the catalyst were studied. when using the xylose and xylan as substrates, the furfural yield were 80.3 % and 68.8 % under the optimal conditions in the H 2 O (NaCl) /toluene (3/3 mL) biphasic solvent system, respectively, and 52.5 % furfural yield was obtained using xylose as substrate in aqueous system. In addition, the catalyst has good thermal stability and easy recovery in the recycling experiment.
研究领域:
催化化学
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生物质转化
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2013
·Vol. 19
·期 42
·14279-14285
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IF 5.831
Dengrong Sun,Yanghe Fu,Wenjun Liu,Lin Ye,Dengke Wang,Lin Yang,Xianzhi Fu,Zhaohui Li
Graphical Higher CO 2 photoreduction activity than previously studied metal–organic framework (MOF) NH 2 -MIL-125(Ti) in the presence of triethanolamine (TEOA) as the sacrificial agent under visible light is exhibited by the amino-functionalized MOF NH 2 -Uio-66(Zr). The photoinduced electron transfer from 2-aminoterephthalate linkers to Zr oxo clusters was revealed for the first time by photoluminescence studies, and the generated Zr III was detected by ESR analysis (see figure). Metal–organic framework (MOF) NH 2 -Uio-66(Zr) exhibits photocatalytic activity for CO 2 reduction in the presence of triethanolamine as sacrificial agent under visible-light irradiation. Photoinduced electron transfer from the excited 2-aminoterephthalate (ATA) to Zr oxo clusters in NH 2 -Uio-66(Zr) was for the first time revealed by photoluminescence studies. Generation of Zr III and its involvement in photocatalytic CO 2 reduction was confirmed by ESR analysis. Moreover, NH 2 -Uio-66(Zr) with mixed ATA and 2,5-diaminoterephthalate (DTA) ligands was prepared and shown to exhibit higher performance for photocatalytic CO 2 reduction due to its enhanced light adsorption and increased adsorption of CO 2 . This study provides a better understanding of photocatalytic CO 2 reduction over MOF-based photocatalysts and also demonstrates the great potential of using MOFs as highly stable, molecularly tunable, and recyclable photocatalysts in CO 2 reduction.
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
MICROPOROUS AND MESOPOROUS MATERIALS
·
2024
·
IF 4.8
Yifan Chen,Zibo Zhang,Hailing Fan,Le Pan,Lu Jin
Antibiotic resistance and the high infectivity of bacteria pose an increasingly threat to human health. Mesoporous silica supporting metal-based nanoparticles are considered an effective strategy to fight bacterial infections. In this work, the short channeled mesoporous Zr-SBA-15 (SBA-S) material is synthesized by sol-gel method using ZrOCl 2 ·8H 2 O as an additive. Nanoparticles based on four types of copper species, Cu, Cu 2 O, CuO, and CuSO 4 , are successfully prepared, forming the Cu-loaded SBA-S materials. The composite structures are comprehensively characterized by SEM, TEM, XRD , XPS , UV–Vis DRS, FTIR, ICP , TG, and BET analysis. It turns out that all structures maintain the arrays of highly ordered pore channels, high specific surface area (SSA, ≥500 m 2 g −1 ), and narrow width of pore size (∼7 nm). The release of Cu 2+ ions shows the order is CuSO 4 /SBA-S > CuO/SBA-S > Cu 2 O/SBA-S > Cu/SBA-S. Antibacterial activity assay indicates that CuO/SBA-S shows 1.25 and 0.62 mg mL −1 of the minimum bactericidal concentration (MBC) values against E. coli and S. aureus . The acting mechanism would include the free Cu 2+ ions and the nanoparticle-induced reactive oxygen species (ROS). We propose that the cheap CuO/SBA-S material would be a promising antibacterial agent with the good antibacterial activity.
研究领域:
材料科学
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微生物学
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医学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
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IF 4.439
Lu Li,Pan Li,Yanjie Wang,Lin Lin,Aamir Hassan Shah,Tao He
The defects like oxygen vacancy in a photocatalyst are critical factors to influence the photocatalytic reactivity since they can have an impact on the behavior of photogenerated charge carrier. Since oxygen vacancy can be readily formed in the ceria due to reversible conversion of the oxidation states between Ce 4+ and Ce 3+ , here ceria is used as the target material. A versatile and facile co-precipitation method was adopted to synthesize hydrangea-like Ce 1−x Zr x O 2 (x = 0.00, 0.025, 0.05 and 0.10). The amount of oxygen vacancy in the obtained catalysts can be modulated by altering the molar fraction of doped Zr. The composition, morphology, physico-chemical properties of the as-synthesized Ce 1−x Zr x O 2 were characterized by using different techniques. It is found that Zr doping into the ceria crystal lattice can lead not only to an enhanced specific surface area and surface adsorption capacity for CO 2 , but also to an increased concentration of oxygen vacancy that can exist in the bulk and on the surface. The Zr-doped ceria exhibits an enhanced activity for photoreduction of CO 2 , which can be explained based on the influence mechanism of oxygen vacancy. This work shows that the oxygen vacancy in the ceria can be modulated via a feasible Zr doping approach, which may help design the photocatalysts with high activity for CO 2 photoreduction.
研究领域:
材料科学
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化学
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环境科学
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催化
✓ 已验证
产品关联
DOI
高影响因子
NUCLEAR TECHNOLOGY
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2023
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IF 1.5
Guanghui Wang,Hui He,Yaorui Li,Meng Zhang,Yang Gao,Caishan Jiao
The contaminated solvent from the Purex process is washed with alkaline detergents such as sodium carbonate, which generates a large amount of secondary wastes. Therefore, hydrazine carbonate as a salt-free reagent deserves to be studied in depth. In this study, the Ce(IV), U(VI), and Zr(IV) metal ions in organic phases containing dibutyl phosphate (HDBP) of 30% tributyl phosphate (TBP)–dodecane were washed with hydrazine carbonate. The effects of the oscillation time (1 to 15 min); temperature (25°C to 85°C); cumulative number of washes (one to four times); mass fraction of hydrazine carbonate (0.1% to 20%); volume ratio of the aqueous phase to the organic phase (0.2 to 5); HDBP concentration (0 to 0.4 M); HNO3 concentration (0.05 to 8 M); and concentration of Ce(IV), U(VI), and Zr(IV) metal ions on the removal percentages of Ce(IV), U(VI), and Zr(IV) metal ions in polluted solvents were studied. The results showed that when the organic phase containing 0.02 M HDBP was washed three times with 5% hydrazine carbonate at 25°C, the removal percentages of the Ce(IV), U(VI), and Zr(IV) ions were 96%, 98%, and 94%, respectively. Meanwhile, the retention concentrations of the three in the organic phase were 35, 28, and 78 mg/L, respectively. The increase of the mass fraction of hydrazine carbonate enhances the removal of the metal ions from the organic phase into the aqueous phase. High acid is not conducive to alkaline washing of metal ions. The increase of HDBP concentration not only promotes extraction but also increases the retention capacity of the organic phase and has the most significant effect on Zr(IV). U(VI) promotes the preferential washing of Zr(IV) while Ce(IV) increases the metal retention concentration of Zr(IV) in the organic phase.
研究领域:
化学工程
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核化学与化工
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Jiacheng Zhang,Xi Sun,Junhao Xin,Li Wang,Yong Fan,Jifu Zheng,Shenghai Li,Jianing Xu,Nanwen Li,Suobo Zhang
To address increasing climate deterioration, it is of great value to prepare highly permselective separation membranes for CO2 enrichment and separation. In this study, zirconium-based metal-organic frameworks (Zr-MOFs) containing defective structures (defected-UiO-66-NH2, D-UN) with a high volume yield (12 g L–1 in a single batch) were prepared at room temperature for the first time using a simple green-synthesis strategy. After the modification with pentafluorobenzaldehyde, the fluorine-containing D-UN (named F-g-UN) nanoparticles showed the characteristics of local and dense distribution of fluorine elements. Due to the optimized CO2 affinity and improved dispersion of fluorination modification, the prepared mixed-matrix membrane (MMM) F-g-UN@AO-PIM-1 achieved synergistic improvement in CO2 permeability and selectivity, exceeding the 2008 Robeson upper bound (CO2 664.1 Barrer and CO2/CH4 34.2) and the 2018 binary CO2/CH4 mixed-gas upper bound (CO2/CH4 28.7). The substantial cause was the introduction of fluorine species, verified by relevant experiments and mechanism analyses such as CO2 adsorption. This work proves the feasibility of using crystal defect engineering and post-treatment strategies to enhance separation functions and offers new insights into designing efficient and low-cost MMMs for gas separation, promoting their application in separation membranes including but not limited to gas separation.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2015
·
IF 2.947
Xiaowei Chi,Zhaoyin Wen,Jingchao Zhang,Yu Liu
A novel hybrid route, combining simple co-precipitation and conventional solid state reaction, is proposed for the first time to synthesize BaCe 0.4 Zr 0.4 Y 0.2 O 3− δ powders at a temperature as low as 1150 °C. This temperature is much lower than that used for conventional solid state reaction method and even comparable to that used in sol–gel route. The reasons for the low calcination temperature are analyzed in detail from the macroscopic to microscopic viewpoints. Moreover, with the powders made by the novel method, dense ceramic could be easily obtained. Further, impedance data illustrated that its electrical conductivity in wet H 2 at 750 °C is up to 1.39 × 10 −2 S/cm, which is the highest among all the samples prepared by the three different methods and much higher than the reported results related to BCZY proton conductors . Also, the new method is particularly suitable for other multi-component oxides .
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）