ELECTROPHORESIS
·
2022
·Vol. 43
·期 11
·1161-1173
·
IF 3.595
Lidi Gao,Xingfang Hu,Shili Qin,Hongtao Chu,Yimin Tang,Xue Li,Binbin Wang
A novel chiral stationary phase (CSP) of Zr-based metal-organic framework, l -Cys-PCN-224, was prepared by one-pot method and applied for the enantioseparation by capillary electrochromatography. The CSP was characterized by X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, Fourier-transform infrared spectra, nitrogen adsorption/desorption, circular dichroism spectrum, zeta-potential, and so on. The results revealed that the CSP had good crystallinity, high specific surface area (2580 m 2 /g), and good thermal stability. Meanwhile, the cross-section of l -Cys-PCN-224-bonded open-tubular (OT) column was observed by a scanning electron microscope, which proved the successful bonding of l -Cys-PCN-224 particles to the inner wall. Relative standard deviations of the column efficiencies were 3.87%–9.14%, and not obviously changed after 200 runs, which indicated that l -Cys-PCN-224-bonded OT column had the better stability and reproducibility. Excellent chiral separation performance was verified with nine kinds of natural amino acids including acidic, neutral, and basic as the analytes. All amino acids studied achieved good separation with the resolution of 1.38–13.9 and selector factor of 1.11–3.71. These results demonstrated that the CSP had an excellent potential in the chiral separation field.
研究领域:
分析化学
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材料科学
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生物化学
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DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 22
·13325-13330
·
IF 3.108
Zhenlong Zhang,Junfeng Li,Xiaoli Wang,Jianqing Qin,Wenjia Shi,Yuefeng Liu,Huiping Gao,Yanli Mao
In this paper, Zr and N co-doped TiO2 (Zr/N–TiO2) nanorod arrays were synthesized using a hydrothermal method and perovskite solar cells were fabricated using them as an electron transfer layer. The solar cells based on Zr/N–TiO2 presented an enhanced performance compared with those based on un-doped TiO2. The solar cell performance was optimized by changing the Zr doping content. The efficiency of solar cells based on Zr/N–TiO2 with a Zr doping content of 1% (Zr/Ti, atomic ratio) has been achieved at 12.6%, which was 31.6% higher than that of solar cells based on un-doped TiO2. To get an insight into the enhancement, some investigations were carried out. The results indicate that the larger open voltage (Voc) could be due to the larger conduction band offset resulting from the smaller energy band gap for Zr/N–TiO2, and the enlarged short current (Isc) could be attributed to the faster electron transfer and reduced recombination rate for Zr/N–TiO2 NRs. These induce the enhancement of solar cell efficiency.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Journal of the Australian Ceramic Society
·
2024
·
IF 1.8
Lin Jia,Wang Shuai,Yang Yihang,Huang Guimei,Wang Jinhuo
In this study, Zr-modified Si-O-C precursor ceramics were prepared using three-dimensional (3D) printing. Ceramic sintering was completed by printing four precursors containing different zirconium acetylacetone contents. Comparative analysis was conducted on the ceramic yield, size shrinkage, mechanical properties, and microstructure. The results showed that the ceramic yield and size shrinkage of the four samples were increased with the increasing zirconium acetylacetone contents. The sample containing 30 wt% zirconium acetylacetone exhibited good compressive performance, with a compressive strength of 50.2 ± 0.6 MPa. Cracks were observed on the surface of samples containing 40 wt% zirconium acetylacetone, while those containing 10, 20, and 30 wt% zirconium acetylacetone were relatively intact. Therefore, a stable Si-Zr-O-C precursor ceramic with good mechanical properties, which can be used for 3D printing, was obtained.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Shunlong Pan,Jiansheng Li,Gaojie Wan,Chao Liu,Wenhong Fan,Lianjun Wang
In this work, Fe 3 O 4 @Zr(OH) x yolk–shell nanospheres (YSNs) were synthesized via a two-step process and further examined as adsorbents for the removal of Pb(II). To understand the hollow structure on the adsorption properties of Pb(II), another adsorbent without hollow cavities, i.e., Fe 3 O 4 @SiO 2 @Zr(OH) x core–shell nanospheres (CSNs), was also prepared for comparison. The adsorption results showed that Fe 3 O 4 @Zr(OH) x YSNs exhibited 41.6% higher Pb(II) adsorption capacity as compared to that of Fe 3 O 4 @SiO 2 @Zr(OH) x CSNs. The isotherm was well fitted to Langmuir adsorption model with q max value of 310.8 mg/g after normalized by the weight of Zr in Fe 3 O 4 @Zr(OH) x YSNs. Scanning transmission electron microscopy (STEM) mapping results revealed that the existence of cavities between Fe 3 O 4 cores and Zr(OH) x shells is responsible for the improved adsorption performance. XPS analysis indicated the surface hydroxyl groups played a key role in the Pb(II) adsorption. The removal efficiency of Pb(II) was maintained above 90% in five consecutive adsorption–desorption cycles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jie Yin,Wendi Fu,Jinrui Zhang,Xinyu Liu,Xinmiao Zhang,Chao Wang,Jing He,Wei Jiang,Hongping Li,Huaming Li
Porous ionic liquids are a novel category media that possesses the catalytic activity of porous solids and the extraction property of ionic liquids. Herein, a new type of porous ionic liquids (denoted as UiO-66-T3PILs) was fabricated by employing UiO-66(Zr) as the pore generator and the ionic liquid ([P 6,6,6,14 ][NTF 2 ]) as the size-excluded solvent for extraction coupled catalytic oxidative desulfurization (ECODS) using hydrogen peroxide (H 2 O 2 , 30 wt%) as an oxidant. Furthermore, several significant reaction parameters such as UiO-66 loading in porous ionic liquids, reaction temperatures, molar ratio of H 2 O 2 /DBT and sulfide species as well as recyclability were investigated in detail. As UiO-66-T3PILs exhibited higher efficiency (95.3%) than the summarized efficiency of UiO-66 and [P 6,6,6,14 ][NTF 2 ], there did exist a synergistic effect between the UiO-66(Zr) moiety and the ionic liquid moiety in UiO-66-T3PILs. With the assistance of density functional theory calculations, a possible mechanism was proposed that aromatic sulfur compounds in the oil phase were first extracted into ionic liquids moiety phase via C-H···π interactions and then rapidly oxidized by OH radicals in the presence of the UiO-66 moiety. This work will pave the way for the rational design of novel porous ionic liquids towards catalysis.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2022
·
IF 5.477
Yong Pan,Feng Liu,Yong Zhou,Chen Zhu,Haixia Pang,Baoming Xu
Background Phosphorus in wastewater is a major environmental concern. Very small phosphorus inputs in the environment can cause algal blooms that can deplete the dissolved oxygen and decrease the water quality, leading to eutrophication. Furthermore, some algal blooms produce toxins and bacterial growth that can cause human illness through exposure to contaminated water. Therefore, It is necessary to remove phosphorus before it is discharged to the environment. Methods adsorbent enhanced adsorptive ultrafiltration (UF) has recently emerged as an advanced ion recovery technology with membrane filtration function and adsorption function, and is very effective in removing cationic bisphosphate and anionic phosphate. Significant findings Herein, a novel defect-rich and covalently-crosslinked octanoic acid (OA)-UiO-66(Zr)-NH 2 /PVC adsorption ultrafiltration membrane are designed for removal of phosphate ions in water. The OA-UiO-66-NH 2 /PVC-33 membrane achieved the adsorption capacity (∼30 mgg −1 ) and higher removal efficiency (∼90%). The OA-UiO-66(Zr)-NH 2 /PVC ultrafiltration membrane exhibited a higher water flux of 266.9 L/(m 2 ·h·bar) compared to those of pristine PVC and UiO-66-NH 2 /PVC. Filtration and cyclic stability experiments reveal that OA-UiO-66(Zr)-NH 2 /PVC membrane can maintain a high retention capacity and exhibit excellent regeneration performance after 5 cycles.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Jun He,Shuang Xiang,Xiaohui Liu,Yanqin Wang
High selective hydrogenolysis of furfural to 2-methylfuran over a metal oxide-based catalyst is promising and challenging. In this paper, a Zr-modified CoO x (Zr 1 Co 6 -325) catalyst was prepared via a simple co-precipitation/reduction and exhibited superior initial activity and remarkable circular stability during the hydrogenolysis of furfural (FUR) to 2-methylfuran (2-MF). As high as 71.2 % yield of 2-MF was achieved at 170 °C for 2 h and nearly no deactivation was found after five cycles, much better than those of reduced Co 3 O 4 catalyst (Co 3 O 4 -250). Comprehensive studies demonstrated that the over-reduction of the CoO species during the reaction process was the main cause of catalyst deactivation. The introduction of Zr species, on the one hand, inhibited the over-reduction of CoO species during reaction processes, thereby enhancing the circular stability. On the other hand, the introduction of Zr species promoted the activation and dissociation of H 2 and therefore improved the activity. This research unveiled the stabilizing effect of Zr species on CoO, providing guidance for the design of high-stable CoO-based catalysts.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2015
·
IF 3.942
Jian He,Hu Li,Ye-Min Lu,Yan-Xiu Liu,Zhi-Bing Wu,De-Yu Hu,Song Yang
A series of Al–Zr mixed oxides with different molar ratios were prepared by co-precipitation method and utilized to catalyze conversion of ethyl levulinate (EL) to γ -valerolactone (GVL). Those as-prepared catalysts were characterized by XRD, SEM, N 2 adsorption–desorption, XPS, TG, NH 3 -TPD, CO 2 -TPD and pyridine-IR. The introduction of Al into ZrO 2 was demonstrated to enlarge surface areas, as well as increase the number of acid and base sites that were catalytically active for transfer hydrogenation. Effects of Al–Zr molar ratio, calcination temperature, reaction temperature and time, catalyst dosage, and alcohols used as hydrogen donors on the catalytic performance were investigated. A high GVL yield of 83.2% at EL conversion of 95.5% could be achieved at 220 °C in 4 h over Al 7 Zr 3 -300 using 2-propanol as hydrogen donor and solvent. Poisoning experiments verified that acid–base sites played a synergic role in producing GVL from EL. Moreover, the Al–Zr mixed oxide catalyst was able to be reused for several times with a slight loss in its catalytic activity.
研究领域:
催化化学
·
可再生化学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 2
·027519
·
IF 3.721
Jie Yuan,Li Jiang,Xiaopei Tan,Yuhua Yue,Haizhu Shi,Shun Feng
A facile way was developed to fabricate Zr(IV) cation modified gold electrode for high-performance electrochemical sensing of methyl parathion (MP) via layer-by-layer self-assembly. The electrode was prepared by sequentially absorbing 11-mercaptoundecyl-phosphoric acid (MDPA) and Zr(IV) cation on gold electrode through strong chelating interactions between gold and -SH as well as Zr(IV) cation and phosphoric groups of MDPA. Fourier transform infrared spectrophotometry, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy and cyclic voltammetry were employed for the characterization of morphologies and electrochemical properties. The sensor was used to determine MP by square wave voltammetry. The cathodic peak current (at + 0.25 V vs saturated calomel electrode) increases linearly in the range of 1.0 − 180.0 ng ml−1 under optimized conditions. And the detection limit is low to 0.22 ng ml−1 (based on a signal-to-noise ratio of 3). The electrode is successfully used to detect MP in the real water sample with recoveries of 98.97%–102.4% and RSDs of 0.21%–1.99% (n = 3) at three spiked levels. The proposed method provides one simple way to prepare Zr(IV) cation modified electrode for the fast determination of MP. The reliability and accuracy of the method is validated by independent assays with HPLC.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Cheng Su,Bingzhu Wang,Huan Guo,Jixiang Dai,Jianjun Sha
In view of the high sintering temperature and difficulty in densification of the ultra-high temperature ceramics(UHTCs), a novel reactive hot-pressing process was designed to achieve the low temperature densification of high strength (Zr,Ta)B 2 -SiC ceramics. It was found that the mechanical properties were closely associated with the microstructure, being dependent on the sintering temperature. The microstructure characterization revealed that the main phases of ceramic were incompletely solid soluted borides and SiC at the sintering temperature of 1600 °C; while at 1700 °C, the boride ceramics were completely solid soluted (Zr,Ta)B 2 and formed an interlocking structure with SiC. The evaluation of mechanical properties indicated that the flexural strength of the ceramics increased from 470.2 MPa to 736.7 MPa when the sintering temperature increased from 1600 °C to 1800 °C. Correspondingly, the fracture toughness increased from 3.54 MPa·m 1/2 to 4.10 MPa·m 1/2 . The improvement of mechanical properties were mainly attributed to the interlocking structure formed by the solid solution (Zr,Ta)B 2 and SiC, which caused the crack propagation path becoming tortuous along the interface of different phases.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yun Long,Jian Sun,Changnian Mo,Xiangyao She,Pengxin Zeng,Hongqiang Xia,Jubing Zhang,Zijian Zhou,Xinming Nie,Chuanwen Zhao
Calcium looping (CaL) belongs to a promising high-temperature CO 2 capture technology because of adopting cheap and extensive source CaO-based sorbents . However, CaO-based sorbents are prone to occur the issues of sintering and elutriation in the fluidized-bed reactors. To further enhance the practicability, the Zr-supported, CaO-based sorbent pellets were produced using the graphite-moulding method. Different synthesis modes (i.e., sol-gel, hydration-mixing, and wet-mixing) were compared for preparing CaO-based composite slurry before pelletization. Sol-gel is the promising synthesis mode to prepare Zr-supported, CaO-based pellets with outstanding CO 2 capture performance due to achieving a more uniform distribution of inert CaZrO 3 spacer. Moreover, the Zr-based stabilizer content within sorbent pellets produced by the combined method of sol-gel and graphite-moulding was further studied. The higher content of Zr-based stabilizer promotes the enhancement of cyclic stability and mechanical strength of Zr-supported, CaO-based pellets. After 17 cycles, the sorbent pellets containing 20 wt% of Zr-based stabilizer display a high CaO carbonation conversion of 74.1 %. Moreover, CaO-based pellets with 20 wt% of Zr-based stabilizer possess a higher compression strength of 4.84 ± 1.08 MPa, which is as high as 1.8 times that of the pellets with 5 wt% of Zr-based stabilizer.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Zhaoyang Qi,Huaifang Li,Jie Chen,Changshen Ye,Ting Qiu
The carboxyl functionalized ionic liquid ([mim(CH 2 ) 3 COOH]Cl) was prepared as a linker to combine phosphotungstic acid (HPW) and Zr(IV) ion. The obtained [mim(CH 2 ) 3 COO] 3 PW-Zr composite acted as a heterogeneous catalyst for removing DBT from liquid fuel with H 2 O 2 as an oxidant. As a result, [mim(CH 2 ) 3 COO] 3 PW-Zr possessed high catalytic activity in extractive and catalytic oxidative desulfurization (ECODS). Moreover, the [mim(CH 2 ) 3 COO] 3 PW-Zr was further exploited to grow on the surface of PEI/silica gel. And the fabricated large-grained Zr-PWIL@PEI/silica gel was used in the continuous ECODS process, and the removal of DBT could still reach more than 95% after running continuously for 16 h. More importantly, the synergistic catalytic mechanism between HPW and Zr(IV) in the ECODS process has been investigated in detail by experiments and DFT calculations. As a result, a plausible mechanism has been proposed and verified, which contains two parts: the Lewis acidic center activating H 2 O 2 to form superoxide ion radicals ( OOH), and the OOH oxidizing HPW to peroxotungstate (W(O 2 ) n ), which has a high oxidizability and stability. Thus, the effective combination of Zr(IV) and HPW active sites is a very effective strategy to promote desulfurization efficiency and utilization efficiency of H 2 O 2 . Besides, we also found the distance between the corresponding active sites of catalysts plays an essential role in ECODS reaction as it strongly influences the synergistic effect between different active sites.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）