SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Shaolong Li,Yusi Che,Jianxun Song,Yongchun Shu,Jilin He,Baoqiang Xu,Bin Yang
A single phase zirconium oxycarbonitride was prepared through a carbothermal reduction route at 1600 °C in nitrogen atmosphere using ZrO 2 and graphite powder as raw materials. The hot-pressed zirconium oxycarbonitride block has good stability in the NaCl-KCl melt. The anodic dissolution behavior of zirconium oxycarbonitride and the reduction mechanism of zirconium ion in NaCl-KCl melt were studied by linear sweep voltammetry, electrochemical impedance spectroscopy, cyclic voltammetry and square wave voltammetry. The results show that zirconium in the anode is oxidized to Zr 2+ ions and dissolved in the molten salt. The zirconium ions diffuse to the cathode and are reduced to zirconium metal by transferring two electrons in one step. Potentiostatic electrolysis at −2.9 V was performed between a Mo rod cathode and ZrC x O y N z anode. The cathode product was detected to be zirconium metal, which indicated that zirconium oxycarbonitride was a suitable consumable anode for the electrolytic preparation of zirconium metal.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2021
·Vol. 52
·期 5
·3276-3287
·
IF 2.47
Li Shaolong,Che Yusi,Song Jianxun,Shu Yongchun,Xu Baoqiang,He Jilin,Yang Bin
A single-phase zirconium oxycarbide was successfully synthesized by carbothermal reduction route at 1600 °C for 8 hours under argon atmosphere using ZrO 2 and graphite powder as raw materials (the molar ratio of ZrO 2 to graphite is 1:2.6). Effects of temperature, reaction time and molar ratio of ZrO 2 to graphite on zirconium oxycarbide preparation were also investigated. The microstructure and composition of the products were characterized by X-ray diffraction, scanning electron microscopy, energy spectroscopy X-ray and ONH analyzer. The hot-pressed single-phase zirconium oxycarbide has good stability in molten NaCl–KCl. Subsequently, anodic dissolution of zirconium oxycarbide and the reduction mechanism of the dissolved zirconium ion in molten NaCl–KCl were investigated by a series of electrochemical technologies. The results show that the zirconium ion species dissolved in molten NaCl–KCl is Zr(II). Zr(II) is transferred from the anode to the cathode in the molten salt and is reduced to zirconium metal. Potentiostatic electrolysis at − 2.9 V was carried out using ZrC x O y as anode. CO gas was detected in the exhaust gas during the electrolysis, which can be explained as the combination of C and O atoms in ZrC x O y . The cathode deposit was detected to be zirconium metal. The results show that zirconium oxycarbide was a suitable anode material for the electrolytic synthesis of zirconium metal.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shu-Fan Li,Tong-Tong Liu,Lang-Jie Ye,Jian Su,Gen Zhang
The regulation of metal–organic framework (MOF) structures for the enhanced removal of perfluoroalkyl and polyfluoroalkyl substances remains a significant challenge. Herein, employing a topology regulation strategy, we synthesized two Zr-MOFs composed of identical inorganic and organic components and investigated their removal efficiency with perfluorooctanoic acid (PFOA). The resultant Zr-MOF-1, characterized by the sqc topology, demonstrated an absorption capacity for PFOA nearly five times greater than that of Zr-MOF-2, which featured the scu topology. The adsorption capacity of Zr-MOF-1 for PFOA reached 335.4 mg/g, attributed to a synergistic mechanism encompassing both chemical and physical absorption. This study illuminates the precise regulation of the absorption performance by structural frameworks.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2023
·Vol. 77
·期 6
·3461-3470
·
IF 2.2
Nabipour Hafezeh,Rohani Sohrab
This research aims to find an effective method to incorporate the anti-inflammatory drug naproxen (NAP) into a prototype zirconium metal–organic frameworks nanohybrid (Zr-MOF@NAP) and aloe vera (AV) biopolymer (Zr-MOF@NAP/AV) as a specific intestinal delivery vehicle. NAP entrapment efficiency and loading capacity were found to be 87.0% and 44.0%, respectively (Zr-MOF@NAP/AV). During the initial 2 h in the simulated stomach media, Zr-MOF@NAP released about 100% of the loaded NAP. Zr-MOF@NAP was coated with AV in order to overcome this challenge. As a result of the pH-responsive nature of AV, Zr-MOF@NAP/AV showed limited drug release at pH 1.2 and a higher percentage of drug release at pH 6.8 and 7.4. MTT assay was used to determine the in vitro cytotoxicity of Zr-MOF@NAP and Zr-MOF@NAP/AV against human fibroblast cells (HFFF2), and these results showed good cytocompatibility.
研究领域:
药剂学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Zhiwei Dong,Yudong Ding,Fei Chen,Xun Zhu,Hong Wang,Min Cheng,Qiang Liao
The inefficient conversion of carbon dioxide (CO 2 ) to methane often restricts the advancement of CO 2 biomethanation technologies . This study explored the degrading performance, microbial community compositions, and functional gene abundance to examine the impact of zirconium metal-organic frameworks (Zr-MOFs) on the CO 2 biomethanation process. The results showed that the maximum utilization rates of CO 2 and H 2 increased by 2.77 times and 2.36 times after the addition of Zr-MOFs, respectively, and the corresponding conversion rate of CO 2 to methane also increased by 57.53%. Additionally, Zr-MOFs enhanced the COD removal efficiency and hydrolysis of tryptophan-like proteins and humic acid-like substances, resulting in more volatile organic compounds, such as tetradecane, 2-pentanone, and hexadecanoic acid. The analysis of microbial community structure revealed that the relative abundance of Methanothrix and Metanobacterium increased by 24.40% and 36.02% after the addition of Zr-MOFs, respectively. The methane metabolism revealed that Metanobacterium was a member of the same aceticlastic methanogenic pathway as Metanothrix , which encodes acetyl-CoA synthetase to catalyze the synthesis of acetyl-CoA from acetate, and Zr-MOFs also increased the relative abundance of genes that encode the enzyme responsible for converting intermediates to methane. Finally, Zr-MOFs improved the biogenesis and utilization of acetate and hydrogen (H 2 ) by enhancing the activity of enzymes, thereby providing more nutrients for methanogenesis . This study provided thorough explanations for the application and improvement of Zr-MOFs in CO 2 biomethanation technology.
研究领域:
环境生物学
·
微生物学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-13
·
IF 5.3
Cao Xiaodong,Zhang Chenlu,Xu Yunan,Wang Wei,Hu Huiying,Chen Keji,Yang Jing,He Shudong,Sun Hanju,Ye Yongkang
An electrochemical biosensor using gold nanoparticles (AuNPs)-doped bimetallic-organic framework (BMOF) with enhanced peroxidase-like activity was constructed to detect Salmonella Typhimurium ( S. typhimurium ). The BMOF of CuZr-MOF was synthesized via a two-step method and used as carrier to in situ immobilize AuNPs. Due to the stability of Zr-MOF, the good electrocatalytic ability of Cu (II), and the synergetic effects of AuNPs, Cu (II) and Zr (IV), the prepared AuNPs@CuZr-MOF nanozyme showed improved stability and catalytic activity to H 2 O 2 oxidation. The oxidation reaction was found to be a surface-controlled process of electron transfer and a pH-dependent electron transfer process of oxidation reaction involving two electrons. Further, AuNPs@CuZr-MOF was biofunctionalized with signal DNA probe, forming sDNA-AuNPs@CuZr-MOF nanotags. The biosensing platform was constructed on a glassy carbon electrode modified sequentially with electrodeposited AuNPs, capture DNA probe (cDNA), and BSA. Finally, a sandwich-type detection structure was formed by hybridization reactions between cDNA and target invA gene of S. typhimurium , as well as between invA gene and the sDNA of sDNA@AuNPs@CuZr-MOF nanotags. Under optimized experimental conditions, the biosensor achieved a linear range of 1 × 10 −16 to 1 × 10 −8 mol L −1 for the target invA gene with a detection limit (LOD) of 6.2 × 10 −17 mol L −1 using differential pulse voltammetry measurement (DPV). It was successfully applied to the direct and quantitative detection of invA gene segments in total DNA extracts of S. typhimurium , showing a linear range from 3.5 to 3.5 × 10 6 CFU mL −1 and a LOD of 0.82 CFU mL −1 . The fabricated biosensor exhibited good selectivity, reproducibility, and storage stability, enabling its use for the detection of invA gene segments in contaminated milk, with recoveries between 95.9% and 103.1%. Graphical
研究领域:
生物传感
·
微生物检测
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Jiangyan Song,Yongyi Yu,Ziyi Zhang,Weisen Yang,Wenbin Pan,Shaoju Jian,Shaohua Jiang,Jiapeng Hu
Deposition of excessive phosphate in natural water column caused several issues, like the eutrophication and destruction of aquatic ecosystems. Adsorption has been an effective and convenient method for phosphate elimination. Herein, a novel bimetallic metal–organic framework adsorbent, namely, La-Zr-MOF, was prepared, and the morphology, crystallite, characteristic functional groups, specific surface area, and composite material surfaces were analyzed using XRD, FT-IR, SEM-EDS, and BET. The adsorption performance of the adsorbent was systematically evaluated by batch adsorption experiments, and the adsorption thermodynamic and kinetic properties were analyzed. The results reveal that La-Zr-MOF exhibits a high selectivity and sorption performance for phosphate, and the adsorption of La-Zr-MOF follows the Langmuir and pseudo–second-order models; the phosphate removal procedure is a chemisorption accompanied by an endothermic reaction, and the maximum capacity was 127.7 mg g −1 . Combined with batch adsorption experiments, kinetic and thermodynamic studies and various characterization analyses together revealed the phosphate removal mechanism, mainly ligand exchange and electrostatic interactions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Sensors and Actuators Reports
·
2024
·
IF 6.5
Zhiming Chen,Zhiwen Shi,Peng Zhang,Li Gao,Bingxin Liu,Lijuan Qiao
The presence of ammonia in exhaled human breath serves as a crucial biomarker for renal diseases. This paper presents a highly sensitive ammonia sensor operable at room temperature, utilizing a Ti/Zr dual metal MOF as its core component, synthesized through a straightforward solvothermal reaction approach. The Ti/Zr-MOF demonstrates excellent responsiveness to ammonia gas, with a detection limit of remarkable sensitivity, reaching as low as 2 ppm. Notably, the sensor exhibits practical insensitivity to similar concentrations of other major interfering breath volatiles, including acetone, ethanol, and saturated moisture. Electron Paramagnetic Resonance (EPR) analysis confirms the presence of oxygen vacancies (Ov) in Ti/Zr-MOF materials, with Ti/Zr-MOF exhibiting stronger Ov signals and the potential for enhanced NH3 adsorption and capture. In-situ FTIR spectrum analysis reveals ammonia-induced -OH (H 2 O) moiety formation, indicating a reaction between adsorbed O 2 − species and ammonia, resulting in decreased electrical resistance of Ti/Zr-MOF.
研究领域:
材料科学
·
医学诊断
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Biosensors-Basel
·
2025
·Vol. 15
·期 5
·291
·
IF 5.6
Yawen Zhu,Xuemei Wang,Zhiyong Yan,Feifei Zhang,Jianfei Xia,Lili Lv,Zonghua Wang
The dual-signal output self-calibration mode reduces the false positive and negative signals of electrochemiluminescence (ECL) aptamer sensors. A competitive dual-signal ECL platform was designed for the ultrasensitive detection of kanamycin (KAN) using a zirconium metal–organic framework (Zr MOF) and Luminol as ECL emitters. To enhance the ECL efficiency, a co-reactant (polyethyleneimine, PEI) was covalently bound to the Zr MOF to achieve self-enhanced ECL. Based on the selective interaction between KAN and its aptamer, the Luminol/KAN/Zr MOF-PEI “sandwich” structure was immobilized on the electrode surface. The competition for PEI between emitters increased the Luminol ECL signal and decreased the Zr MOF’s ECL signal. The ratio in ECL signals between the two competitive emitters enabled the quantitative analysis of KAN, achieving a detection limit as low as 7.86 × 10−4ng/mL. This study elucidated the synergistic mechanism between self-enhanced ECL and ECL competition, offering a novel approach for constructing dual-signal ECL sensors using a single co-reactant.
研究领域:
分析化学
·
生物传感
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Jiwei Dong,Guangxian Wang,Lingjun Geng,Haifang Wang,Chengqiang Li,Rui Xu,Jing Liu,Jingjing Liu,Ibrahim A. Darwish,Xia Sun,Yemin Guo,Jicheng Zhao
To address the threats posed by organophosphorus pesticides (OPs) to human health and the environment, this study developed a highly sensitive electrochemical aptasensor based on gold nanoparticles (AuNPs) and a functionalized bimetallic copper-zirconium metal-organic framework (CuZr-MOF). In this system, Cu + doping greatly enhances electrical conductivity, after which Zr⁴⁺ provides excellent stability and a large specific surface area. The combination of AuNPs and CuZr-MOF formed a nanocomposite that enhanced sensitivity and enabled the stable immobilization of a thiol-modified broad-spectrum aptamer via Au-S bonding, facilitating efficient recognition of OPs. The aptasensor demonstrates exceptional performance across a concentration range of 1×10 -12 to 1×10 -6 M, with limits of detection of 2.36×10 -4 pM, 4.56×10 -2 pM, and 1.20×10 -2 pM for three representative OPs, and recovery rates ranging from 91.0% to 101.2%. The method’s reliability is further validated by liquid chromatography-tandem mass spectrometry (LC-MS/MS). This study presents a simple and effective approach for detecting OPs in vegetables, demonstrating significant potential for on-site food safety monitoring.
研究领域:
食品安全
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yu Hu,Xin Li,Xiaolin Zhang,Weiming Zhang,Bingcai Pan,Ming Hua
The salt ions (typically > 1000 mg/L) present in copper plating wastewater limit the application of ion exchange in the deep treatment of copper complexes (such as copper-pyrophosphate (Cu-PPi)). Metal nanoparticle immobilization is an effective method, and bimetallic nanoparticles have more potential than monometallic ones. In this study, bimetallic nanocomposite Ti-Zr-201 was successfully synthesized by confining Ti-Zr oxide nanoparticles in the pores of anion exchange polymer (D201). The obtained new adsorbent Ti-Zr-201 with bimetallic doped structure had more active sites (7.22 mmol/g), higher hydroxyl content (3.51 × 10 22 OH/ nm 2 ) and larger specific surface area (31.65 m 2 /g) than monometallic nanocomposite adsorbents (Zr-201 and Ti-201). The results showed that Ti-Zr-201 has better Cu-PPi adsorption capacity (24.82 mg Cu/g) than Zr-201 (21.48 mg Cu/g) and Ti-201 (21.71 mg Cu/g) in the high salt water (2000 mg/L NO 3 – ). Further mechanistic studies revealed that Cu-PPi removal as a whole was mainly realized via ternary complexation (Ti/Zr-O-Cu-PPi of Type-A, Ti/Zr-O-PPi-Cu of Type-B) and quaternary complexation (Ti/Zr-O-PPi-Cu-PPi of Type-B) both formed during the adsorption. The saturated Ti-Zr-201 can be regenerated more than 90% rapidly and had good stability. Moreover, the novel adsorbent also had a excellent removal effect on several other phosphorous copper complexes (tripolyphosphate, methyl dihydrogen phosphate, etc.). Therefore, the nanocomposite Ti-Zr-201 exhibited promising application on the deep removal of complex-state Cu with phosphorus ligands from high salty wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Linna Han,Zixu Wang,Wanfang Feng,Qing Xia,Yucun Niu,Liyan Liu
Background The enrichment of sugar phosphates (SPx) from complex biological samples was of significant importance for elucidating their roles in physiological and pathological processes. However, the detection of SPx faced numerous challenges due to the high structural similarity among its isomers, its extremely low abundance within cells, the complexity of biological samples, and the inefficiency and cumbersome nature of traditional enrichment methods. Therefore, there was an urgent need to develop an efficient enrichment technique, leveraging the advantages of magnetic separation to achieve precise detection of sugar phosphates in biological samples. Results A novel magnetic material, Fe 3 O 4 @UiO-66-Br, was synthesized for efficient and convenient enrichment of SPx in biological samples. The material exhibited a high specific surface area (225.08 m 2 /g) and strong magnetism (33.61 emu·g −1 ). Only 600 μg of Fe 3 O 4 @UiO-66-Br was required to completely adsorb five types of SPx within 4 min. The adsorption process was pH-tolerant and can be accomplished simply by standing. Kinetic, thermodynamic, and isotherm studies revealed favorable adsorption properties, characterized as spontaneous and endothermic monolayer chemisorption. Mechanistic studies using XPS, FT-IR, and DFT identified multiple interactions, including coordination, hydrogen bonding, and electrostatic interactions. The analytical protocol featured a wide linear range (0.01–10000 ng/mL), low detection limits (0.002–0.01 ng/mL), high precision (RSD<13.21 %), and accuracy (80.05 %–116.41 %). Significance The protocol was successfully applied to real blood samples, demonstrating the potential of magnetic MOFs for SPx adsorption and detection. This novel material and protocol provided an efficient approach for enriching and detecting trace SPx in complex biological matrices, facilitating further studies on their roles in physiological and pathological processes.
研究领域:
分析化学
·
材料科学
·
生物化学
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）