JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2018
·Vol. 87
·期 3
·734-742
·
IF 1.745
Wang Xiaoqing,Wu Zongxiao,Zhi Mingjia,Hong Zhanglian
Abstract We reported the preparation of a series of ZrO 2 -SiO 2 composite aerogels via the sol-gel reaction between the zirconium source (ZrOCl 2 ·8H 2 O) and the gel initiator (mercaptosuccinic acid-triethoxyvinylsilane). Such novel gel gelator was prepared by the thiol-ene click reaction using triethoxyvinylsilane (VTES) and mercaptosuccinic acid (MSA). The unique molecule structure of the gel initiator allows the in-situ modification of ZrO 2 with SiO 2 in the sol-gel reaction, which was achieved by the hydrolysis and polycondensation of siloxane with the change of the pH spontaneously. SiO 2 with the controllable content can be in-situ introduced into ZrO 2 backbone. As a result, the composite aerogel showed better thermal stability compared with pristine ZrO 2 aerogel, proved by the following facts: (i) the aerogels remained amorphous after calcination in air at 600 °C; (ii) the specific surface area maintained at 53.4 m 2 /g when the temperature rising to 1000 °C.
ZrO 2 -SiO 2 composite aerogels with improved thermal stability have been prepared via the “thiol-ene” click section
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 52
·期 3
·609-620
·
IF 4.569
Samuel Guemou,Dongqiang Gao,Fuying Wu,Jiaguang Zheng,Tao Wei,Zhendong Yao,Danhong Shang,Liuting Zhang
As an ideal material for solid-state hydrogen storage, magnesium hydride (MgH2) has attracted enormous attention due to its cost-effectiveness, abundant resources, and outstanding reversibility. However, the high thermodynamics and poor kinetics of MgH2 still hinder its practical application. In this work, a simple stirring–hydrothermal method was used to successfully prepare bimetallic Mn3O4/ZrO2 nanoparticles, which were subsequently doped into MgH2 by mechanical ball milling to improve its hydrogen sorption performance. The MgH2 + 10 wt% Mn3O4/ZrO2 composite began discharging hydrogen at 219 °C, which was 111 °C lower compared to the as-synthesized MgH2. At 250 °C, the MgH2 + 10 wt% Mn3O4/ZrO2 composite released 6.4 wt% hydrogen within 10 min, whereas the as-synthesized MgH2 reluctantly released 1.4 wt% hydrogen even at 335 °C. Moreover, the dehydrogenated MgH2 + 10 wt% Mn3O4/ZrO2 sample started to charge hydrogen at room temperature. 6.0 wt% hydrogen was absorbed when heated to 250 °C under 3 MPa H2 pressure, and 4.1 wt% hydrogen was taken up within 30 min at 100 °C at the same hydrogen pressure. In addition, compared with the as-synthesized MgH2, the de/rehydrogenation activation energy values of the MgH2 + 10 wt% Mn3O4/ZrO2 composite were decreased to 64.52 ± 13.14 kJ mol−1 and 16.79 ± 4.57 kJ mol−1, respectively, which incredibly contributed to the enhanced hydrogen de/absorption properties of MgH2.
研究领域:
材料科学
·
氢能
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Can Tao,Fang Zhao,Zi-Wei Tang,Luxi Zhang,Qiang Niu,Gao Cao,Li-Min Zhao,Wenhuan Huang,Ping Zhao
Magnetic mesoporous ZrO 2 (Fe 3 O 4 @ZrO 2 , MMZr) nanoparticles blocked by bismuth oxide (Bi 2 O 3 ) are presented and efficiently deliver chemotherapeutic agent daunomycin (DNM) to the targeted tumor cells. Bi 2 O 3 not only rapidly dissolves in the acidic condition of cancer cells to release the loaded chemotherapeutic drug but also enhances the anti-cancer effect through synergistic effects of the chemotherapy and Bi 3+ ions. By monitoring the treatment process, compared with the free drug DNM, the drug loaded DDS exhibit more significant suppression against cancerous cells growth such as A549 and MCF-7 cancer cells and lower cytotoxicity against normal Hacat cells. Mechanism research indicates that the drug loaded DDS can arrest the cell cycle at G0/G1 phase, change the mitochondrial membrane potential and finally induced the apoptosis of the cancerous cells. These results indicate that the Bi 2 O 3 -gated ZrO 2 platform is a promising approach to serve as a pH-sensitive DDS in the treatment of various cancers by chemo/ionic synergistic effects.
研究领域:
纳米技术
·
癌症治疗
·
药物递送系统
·
材料科学
✓ 已验证
DOI
高影响因子
NANO
·
2021
·
IF 1.556
Tianqi Zhou,Canxing Yang,Han Wu,Guodong Jiang,Jian Xiong,Qing Ai,Renzhong Huang,Songdong Yuan
Al 2 O 3 –ZrO 2 was coated on the surface of nickel-rich cathode materials by the sol–gel method to improve its electrochemical performance. The nanometer-thick Al 2 O 3 –ZrO 2 coating layer refrains the side reaction between the electrolyte and the electrode, thus preventing the collapse of LiNi 0 . 8 Co 0 . 1 Mn 0 . 1 O 2 layered structure and protecting the stability of the material. The electrochemical test shows that LiNi 0 . 8 Co 0 . 1 Mn 0 . 1 O 2 coated with Al 2 O 3 –ZrO 2 has good cycle and rate performance. Under the cut-off voltage of 2.8–4.5 V, LiNi 0 . 8 Co 0 . 1 Mn 0 . 1 O 2 coated with Al 2 O 3 –ZrO 2 delivered an initial capacity which was 166.7 mAh g − 1 at 1C (200 mAh g − 1 ) rate, and the capacity retention rate was 77.7% after 200 cycles. The pristine LiNi 0 . 8 Co 0 . 1 Mn 0 . 1 O 2 delivered an initial capacity which was 166.4 mAh g − 1 at 1C rate, and the capacity retention rate was 51.7% after 200 cycles. The EIS and CV provided the enhanced electrochemical performance of LiNi 0 . 8 Co 0 . 1 Mn 0 . 1 O 2 coated with Al 2 O 3 –ZrO 2 which was due to accelerating Li + diffusion of nickel-rich materials and electrolytes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 38
·17984-17998
·
IF 3.3
Si Duan,Guihong Lan,Xiaoting Yang,Yongqiang Liu,Haiyan Qiu,Bo Xu,Yuan Gao,Zhuang Xie
Antibiotic contamination has become one of the most pressing problems in the field of water purification. Using nano-graphite (nano-G) as a carbon carrier, a ZrO2–MnOx/nano-G composite electrode with high catalytic activity was prepared by a hot pressing method based on MnOx/nano-G prepared by a sol–gel method. The results showed that the ZrO2–MnOx/nano-G electrode reduces charge transfer resistance while improving surface oxygen desorption ability. MnOx can catalyze the two-electron reduction of O2 to produce H2O2, which can then be converted to ˙OH and ˙O2−. Thereafter, the results of free radical capture experiments confirmed that ˙O2− played a significant role in the electrocatalytic degradation of tetracycline hydrochloride (TC) by a ZrO2–MnOx/nano-G composite electrode. Furthermore, the abundant hydroxyl groups on the surface of nano-G and ZrO2 particles can be used as active sites for catalyzing the Mn3+/Mn4+ redox reaction, resulting in the generation of additional free radicals. The high-efficiency electrocatalytic degradation of TC was achieved through the synergistic action of the three. Under optimal reaction conditions, the degradation rate of TC reached 93% after 120 min of electrolysis. ZrO2–MnOx/nano-G displayed satisfactory stability following 10 cycles of degradation experiments. Finally, the potential TC degradation pathway was investigated using liquid chromatography-mass spectrometry (LC-MS) and density functional theory (DFT), and the degradation mechanism was clarified.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2025
·
IF 5.3
Biao Gao,Wenbo Gao,Longtai Li,Tatsumi Ishihara,Limin Guo
The In 2 O 3 -ZrO 2 solid solution catalyst has emerged as a versatile catalytic support for CO 2 hydrogenation to methanol, enabling noble metal-based systems (e.g., Pt, Ir) to achieve improved methanol selectivity. Building on this foundation, we introduce cobalt into the In 2 O 3 -ZrO 2 matrix, creating a novel Co/In 2 O 3 -ZrO 2 composite catalyst that synergistically integrates transition metal functionality with oxide engineering. The optimized catalyst achieves a methanol space-time yield of 0.80 g MeOH ·gcat −1 ·h −1 at a 5.0 MPa, H 2 /CO 2 = 3:1, 320 °C, GHSV = 48,000 cm 3 · g cat − 1 · h −1 , surpassing reported In 2 O 3 -ZrO 2 and Co/In 2 O 3 benchmarks. Mechanistic studies reveal that methanol synthesis follows the formate pathway, where ZrO 2 amplifies oxygen vacancy density to improve CO 2 adsorption and weakens CO adsorption through electronic modulation.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Boyang Wu,Caiping Liu,Chengyu Fu,Pan Wu,Changjun Liu,Wei Jiang
The recovery and separation of vanadium and chromium from vanadium-containing chromate solution are necessary and valuable for the comprehensive utilization and environmental protection of V-Ti-bearing magnetite ore. In this work, a tetragonal ZrO 2 adsorbent was used for harmless treatment and resource reuse of a low-concentration vanadium-containing chromate solution. Results confirmed that water after treatment met the wastewater discharge standard; in addition, Cr(VI) and V(V) were efficiently separated with the V/Cr separation coefficient of 362.05 for the pH of 3.5 and the V/Cr ratio of 1:1 at the concentration of 80 mg/L. This excellent and stable separation performance of ZrO 2 was ascribed to the competitive adsorption of V(V) and Cr(VI) on ZrO 2 , owing to the strong effect of pH on their adsorption and desorption behavior. V(V) and Cr(VI) in vanadium-containing chromate solution can be removed, recovered, separated and enriched through a two-step adsorption/desorption process. The purity of vanadium and chromium can reach more than 99.8%. The adsorption of vanadium and chromium by ZrO 2 has high application value, which is beneficial to the recovery of resources and environmental protection.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2020
·Vol. 38
·期 4
·399-405
·
IF 3.826
Ying Qiao,Lixin Feng,Zhongqiu Li,Zhenyu Zhang,Jing Chen,Haining Na,Jin Zhu,Lai Chen
Summary of main observation and conclusion Five types of ZrO 2 are used to simply establish an effective aqueous catalytic system with sulfuric acid for the hydrolysis of cellulose to sugar, respectively. By adjusting surface roughness and particle size of ZrO 2 , different adsorption is produced. Accordingly, following the thought to inhibit the self-aggregation nature of cellulose, after the introduction of ZrO 2 with adsorption in catalysts, the efficiency of the hydrolysis of cellulose to sugar is improved. The results show different ZrO 2 can produce different effects during the hydrolysis of the cellulose with relatively low crystallinity. Under the optimal conditions, the conversion of cellulose and TRS yield reaches 95.5% and 93.6%, respectively. Through this research, it reveals the critical point to organize a feasible and useful way for the hydrolysis of cellulose to sugar with high efficiency in an aqueous system. An important theoretical and technical support is also provided for the conversion and utilization of cellulose in the future.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2021
·Vol. 10
·期 7
·1616
·
IF 4.35
Xiudan Hou,Rong Ding,Shihai Yan,Haiyan Zhao,Qingli Yang,Wei Wu
A novel sorbent based on the ZrO2nanoparticles and poly(diallyldimethylammonium chloride)-modified graphene oxide aerogel-grafted stainless steel mesh (ZrO2/PDDA-GOA-SSM) was used for the extraction and detection of organophosphorus pesticides (OPPs). Firstly, the PDDA and GO composite was grafted onto the surface of SSM and then freeze-dried to obtain the aerogel, which efficiently reduced the accumulation of graphene nanosheets. It integrated the advanced properties of GOA with a thin coating and the three-dimensional structural geometry of SSM. The modification of ZrO2nanoparticles brought a selective adsorption for OPPs due to the combination of the phosphate group as a Lewis base and ZrO2nanoparticles with the Lewis acid site. The ZrO2/PDDA-GOA-SSM was packed into the solid-phase extraction (SPE) cartridge to extract OPPs. According to the investigation of different factors, the extraction recovery was mainly affected by the hydrophilic-hydrophobic properties of analytes. Effective extraction and elution parameters such as sample volume, sample pH, rate of sample loading, eluent, and eluent volume, were also investigated and discussed. Under the optimal conditions, the linearity of phoxim and fenitrothion was in the range of 1.0–200 μg L−1, and the linearity of temephos was in the range of 2.5–200 μg L−1. The limits of detection were ranged from 0.2 to 1.0 μg L−1. This established method was successfully applied to detect OPPs in two vegetables. There was no OPP detected in real samples, and results showed that the matrix effects were in the range of 46.5%–90.1%. This indicates that the ZrO2/PDDA-GOA-SSM-SPE-HPLC method could effectively extract and detect OPPs in vegetables.Keywords:graphene aerogel;ZrO2;solid-phase extraction;organophosphorus pesticides
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yao Shen,Ke Wang,Lu Li,Jingkai Zhao,Jiexu Ye,Ping Chen,Xiang Gao,Shihan Zhang
Catalyst-aided CO 2 desorption offers a promising reduction in the energy penalty of amine scrubbing, but faces the challenges of slow mass transfer, sluggish desorption kinetics, and susceptibility to deactivation. In this work, a hollow composite catalyst C@ZrO 2 was developed to simultaneously realize rapid electron, proton and mass transfer for CO 2 desorption via facilitating proton-coupled electron transfer (PCET) effect. The CO 2 desorption rate of benchmark MEA solution increased by 126% and relative heat duty decreased by 69.9% in presence of C@ZrO 2 , and its catalytic performance didn’t noticeably decline after 10 cycles. Additionally, the desorption rate of biphasic solvents with a high viscosity increased by 112% and relative heat duty decreased by 57.3% with C@ZrO 2 . Based on theoretical calculation, the facilitated PCET efficiency of carbon layer increased the binding energy of carbamate to enhance its mass transfer rate from the liquid phase to the C@ZrO 2 surface, and stretched the C-N bond to reduce the proton transfer energy barrier by 66.8%. This work provided a novel insight to design catalysts for energy-efficient and stable CO 2 capture.
研究领域:
化学工程
·
催化材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Baojie Zhang,Zongwei Tong,Huijun Yu,Hui Xu,Zhiwei Chen,Xiaolei Li,Huiming Ji
Silicon carbide (SiC) fibers have excellent high temperature resistance and chemical stability in extreme environment. However, the practical application of SiC fibers have been limited by their high intrinsic thermal conductivity . Herein, the novel ZrO 2 /SiC-based nanofiber membranes with high temperature resistance and low thermal conductivity were prepared for the first time using simple blending method via electrospinning technique combined with subsequent curing and pyrolysis. The microstructure, composition, high temperature resistance and thermal insulation mechanisms were analyzed in detail. The results showed that the introduction of Zr could significantly improve the high temperature resistance of the nanofibers up to 1400 °C, at the same time, the multi-phase microstructure (SiOxCy, ZrO 2 , β-SiC and residual carbon) endows it with ultralow thermal conductivity at high temperature (0.217 W m -1 K -1 at 1300 °C). Compared with the reported thermal insulation materials, this work not only prepares thermal insulation materials with higher temperature resistance, but also provides a new perspective for the research of SiC-based nanofibers in the field of thermal insulation.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2019
·Vol. 27
·期 26
·37568-37578
·
IF 3.561
Yongqiao Zhu,Ming Ma,Pu Zhang,Wenzhe Cai,Dawei Li,Cheng Xu
In this study, three different types of ZrO2 films were prepared with different precursors and additives using the sol-gel method. High-temperature annealing was implemented to investigate the impact of temperature on optical properties, microstructure, surface morphologies and absorption of these films. According to the laser-induced damage threshold (LIDT) tests on films having experienced annealing and those implemented with in-situ high temperature, the ZrO2 film with ZrOCl2·8H2O as the precursor and copolymer of silicone and polyaldoxyl ether as the additive had the highest resistance to laser-induced damage. After annealing at 623 K, its LIDT was 21.4 J/cm2, while that at an in-situ high temperature of 523 K was 23.9 J/cm2. The strong high temperature resistance was likely attributed to the usage of carbon-free precursor and high temperature-resistant additive, which contributed to low carbon contents and less structural damage caused by organic matter evaporation. In this context, there were less high temperature-induced impurity and structural defects, leading to higher LIDT values. This study provided a novel method for preparing high temperature-resistant sol-gel films, which shed light upon wider potential application of sol-gel films at high-temperature conditions.
研究领域:
材料科学
·
光学工程
✓ 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）