NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 24
·10850-10856
·
IF 3.591
Xiaoyan Chen,Lin Song,Guanyang Zhu,Jing Ma,Ajing Xu,Wenya Zhao,Yingying Gu,Yarui An,Yuqing Miao
In this work, a unique zirconium dioxide solid superacid (ZrO2/SO42−) was utilized for the fabrication of an IgG electrochemical immunosensor. The treated ZrO2 formed a SO bond on the surface, which has the electron-attracting induction effect and can further enhance the quantity and stability of immobilized biomolecules. In addition, using a platinum nanoparticle–chitosan–reduced graphene oxide (PtNP–CHIT–rGO) nanocomposite as a substrate modification material not only improves the conductivity of the electrode, but also increases the effective surface area of the immunosensing platform. The proposed label-free immunosensor has a lower detection limit of 11.0 pg mL−1 and a wide linear range of 0.01–10.0 ng mL−1 and 10.0–4000.0 ng mL−1. Importantly, the immunosensor exhibits good selectivity, excellent stability and reproducibility, and is expected to be applied to the detection of other biomolecules.
研究领域:
生物化学
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分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Ying Qiao,Chengkai Zhai,Fei Liu,Lai Chen,Haining Na,Jing Chen,Jin Zhu
Following the main idea of a two-step method, microcrystalline cellulose is firstly pretreated to prepare regenerated cellulose (RC) with low crystallinity. Then, RC is continuously hydrolyzed to sugar in aqueous system by microwave driving. With the establishment of ZrO 2 contained low acid catalytic system, an advanced route driven by microwave radiation to induce highly efficient hydrolysis of RC to sugar is formed. Due to the effect of ZrO 2 on the molecular chain of cellulose, the recrystallization of RC is obviously weakened, and higher hydrolysis reactivity is achieved. Under the optimal conditions, the average conversion of RC and the yield of total reducing sugar highly reach 98.4 ± 0.5% and 97.9 ± 0.6%, respectively. The result is extremely superior to the efficiency of hydrolysis initiated only by pure acid. As a result, a novel and simple thinking to establish an advanced two-step methodology to hydrolyze cellulose to sugar with high efficiency is achieved.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Yongfeng Zhou,Pei Liang,De Zhang,Lisha Tang,Qianmin Dong,Shangzhong Jin,Dejiang Ni,Zhi Yu,Jiaming Ye
A stable substrate is extraordinarily important for the trace detection of Surface Enhanced Raman Scattering technique. We have designed in this paper a simple seed growth method to prepare Ag@ZrO 2 core-shell nanoparticles as well as regulate the core-shell ratio by adjusted concentration of zirconium propoxides added. The shell thickness effect and spacing on SERS activities have been simulated in different finite time domains, which goes perfectly with those previous experiment results. With Ag@ZrO 2 core-shell nanoparticles adopted as the SERS substrate and R6G as molecular probe , the detection range could reach as great as 10 -8 M. The regression model, obtained through principal component analysis, is adopted for some rapid and precise detection; and the determination coefficient (R 2 ) is going up to 0.9743, proving that the SERS substrate we have prepared has extremely high detection accuracy. To explore the stability of core-shell nanoparticles, we have taken both two different cases of strong acid solution as well as strong alkali solution for the core-shell nanoparticle etching, and this is how a SERS test could be carried out. These experimental results have indicated that the outer zirconia layer could keep the silver surface from oxidation and its stability is ensured, quite crucial for the applied SERS.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Bingying Gao,Xuzhang Sun,Chao Yao,Linqiang Mao
High–temperature resistant aerogel coating usually prevents damage to walls and equipment in a harsh high–temperature environment, but these coating still has some disadvantages in practical application, such as short time of high–temperature resistance or low stability. In this work, ZrO 2 –Al 2 O 3 composite aerogel coating with prominent high–temperature resistance and rapid heat dissipation was successfully fabricated by employing (Al(H 2 PO 4 ) 3 , AHP) as high–temperature adhesive to form stable phosphates products. The thermal conductivity and thermal diffusivity of the obtained ZrO 2 –Al 2 O 3 composite aerogel coating are 0.1602–0.1623 W/mK and 0.3488–0.4702 mm 2 /s, respectively. The resultant aerogel coating with a thickness of 1.4 cm showed good performance in heat resistance with tolerance of flame up to ∼1300 o C for 15 min, and rapid heat dissipation that can be cooled to 32.7–38.4 o C within 60–70 s. Phosphate products, such as AlPO 4 and ZrP 2 O 7 , are mainly formed at high temperature with the introduction of AHP, which fundamentally improves the high–temperature resistance and flame retardant of aerogel coating. Different microstructure and pore structure are responsible for the heat dissipation performance of the aerogel coating, which shows high thermal diffusivity of 0.3488–0.4702 mm 2 /s. Overall, this work provides a new strategy for preparing aerogel coating with high–temperature resistance, flame retardant, thermal stability and rapid heat dissipation suitable for harsh conditions.
研究领域:
材料科学
·
热力学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Fei Wang,Songyin Yu,Hui Xu,Junfeng Feng,Feihong Guo,Xiaoxiang Jiang,Jianchun Jiang
To solve the problem of harsh reaction conditions in lipid hydrogenation into fatty alcohol over Cu based bimetallic catalysts, the cheap Ni-base catalyst with high activity was synthesized. By using the hydrothermal method, the flower-like SiO 2 -ZrO 2 support was prepared. The Ni-Fe/SiO 2 -ZrO 2 catalyst was further prepared by the impregnation method and utilized in the fatty acid hydrogenation to produce fatty alcohol. Under the reaction conditions (240 °C, initial H 2 pressure: 2 MPa and reaction time: 3 h), the Ni-Fe/0.13SiO 2 -ZrO 2 catalyst attained 96.0% conversion and 86.4% fatty alcohol yield, much higher than that of Ni-Fe/ZrO 2 without SiO 2 (conversion 86.1% and fatty alcohol yield 61.9%). The high catalytic activity of Ni-Fe/0.13SiO 2 -ZrO 2 was ascribed to the increase of surface area, reduction of NiO grain size, and formation of flower-like morphology. The high selectivity to fatty alcohol over Ni-Fe/0.13SiO 2 -ZrO 2 was related to the increase of Lewis acidity (extra active sites) and the decrease of oxygen vacancy which weakened the adsorption of aldehyde (enol) on the catalyst and thus facilitated the formation of fatty alcohol.
研究领域:
催化化学
·
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Liyu Chen,Jiaxin Yang,Yifan Zhang,Shaohua Wu,Youjian Yang,Wenju Tao,Jiangyu Yu,Zhaowen Wang
The electrochemical behavior of Zr(IV) on a molybdenum (Mo) electrode in a KF-AlF 3 -Al 2 O 3 -ZrO 2 molten salt system was studied using cyclic voltammetry (CV), square-wave voltammetry (SWV) and chronopotentiometry (CP). The reduction process of Zr(IV) was found to follow a two-step, two-electron transfer mechanism: Zr(IV)+2e − →Zr(II) and Zr(II)+2e − →Zr(0). The reduction process was quasi-reversible and controlled by diffusion. Al-Zr alloys were successfully obtained on Mo and liquid aluminum electrodes by potentiostatic electrodeposition . Flower-like AlZr 3 and irregular granular Al 3 Zr were obtained on the Mo electrode, which were mainly attributed to the electrochemical co-reduction of Al(III) and Zr(IV) in the molten salt. Three Al-Zr alloy phases, Al 3 Zr , Al 3 Zr 2, and Al 2 Zr, were obtained on the liquid aluminum electrode, among which Al 3 Zr was dominant in the product, followed by Al 3 Zr 2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Qihong Xue,Zhikui Jiang,Chao Wang,Xian Kan,Jiaming Wang,Jiangang Chen
13-Ni/ZrO2, 13-Ni3P/ZrO2, 13-Ni/SiO2, and 13-Ni3P/SiO2 catalysts were used in the hydrogenation of diethyl oxalate (DEO) to ethyl glycolate (Egly) to investigate the modulating effect of phosphorus. XRD, TEM and FT-IR results show that phosphorus act as a divider of Ni metallic particle and shows a segregation effect. The presence of P transformed the linkage of surface metals from the original -Ni-Ni-Ni-Ni- to the P-Ni-P-Ni-P state, and FT-IR shows that the former adsorbed CO in a combination of linear and bridging adsorption mode, whereas the latter predominantly in CO linear adsorption. Bridging adsorption is via dual sites and makes the preliminary hydrogenation products less likely to detach from the catalyst surface thus facilitating deep hydrogenation, while linear adsorption facilitates partial hydrogenation by a rapid detachment of intermediate product like Egly. The various loading Ni3P/SiO2 catalysts show incomplete phosphorylation with increasing nickel loading, giving rise to a state of coexistence of Ni and Ni3P crystalline phases. This may lead to a coexistence of surface -Ni-Ni-Ni-Ni- and P-Ni-P-Ni-P and the corresponding assort of adsorption, e.g. bridging/linear ones, making deep hydrogenation occur partially besides stepwise hydrogenation.
研究领域:
催化
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Xueying Gao,Xin Yu,Lincai Peng,Liang He,Junhua Zhang
A magnetically-recoverable multifunctional catalyst (Fe 3 O 4 /ZrO 2 @MCM-41) was tailored by the impregnation of ZrO 2 supported on mesoporous MCM-41 coated Fe 3 O 4 nanoparticles, which successfully served as a monolithic catalyst for the cascade conversion of furfural (FAL) giving high yield to γ-valerolactone (GVL), a versatile platform molecule. The ordered hexagonal framework of the parent MCM-41 well reserved after the embedding of Fe 3 O 4 and ZrO 2 . The incorporation of Fe 3 O 4 could not only impart the catalyst with a strong magnetism, but also tune its acidity to promote GVL production. An impressive yield of 85% was accomplished straight from FAL processing with iso -propanol as a hydrogen donor and solvent. The kinetic study demonstrated higher activation energy for levulinate-to-GVL step (86.9 kJ/mol) than FAL transfer hydrogenation (35.0 kJ/mol) and subsequent alcoholysis process (51.0 kJ/mol). The catalyst could be fully recovered by an external magnetic field and showed good reusability. The sustainability of this conversion represents greatly improved by the process intensification based on one-pot reaction, magnetically-recoverable multifunctional catalyst, and mild operating conditions without using gaseous hydrogen.
研究领域:
催化化学
·
纳米材料科学
·
可再生化学
✓ 已验证
DOI
高影响因子
Applied Catalysis O: Open
·
2024
·
IF 0
Sijun Chen,Tingwei Zhang,Yongcan Jin,Huining Xiao
Fructose is a vital ketose in the production of 5-hydroxymethylfurfural platform molecules. Herein, Zr-doped hexagonal mesoporous silica was prepared over in situ co-assembly (Zr-x-HMS, x is the mole ratio of Si to Zr, x = 20, 50) and post-impregnation (Zr-Imx-HMS, x = 20, 50, 100) processes to regulate its catalytic performance against the isomerization of glucose to fructose in ethanol. The post-impregnation process did not significantly change the original pore structure and morphology of HMS, Zr-Im50-HMS with medium Zr loading possessed the most Lewis acid sites with medium strength among Zr-Imx-HMS catalysts. The in situ process changed the physical properties of HMS and enhanced the interaction of Zr sites and silica framework, facilitating the formation of Lewis acid sites with medium strength. Zr-Im50-HMS possessed the most suitable acidity for fructose production, and an optimal yield of 31.2% was achieved at 160 °C and 20 min. Moreover, the recyclability of Zr-Im50-HMS was acceptable.
研究领域:
催化
·
化学工程
·
材料科学
·
绿色化学
✓ 已验证
DOI
Materials Today Energy
·
2024
·
IF 9
Xiao-Jie Kang,Hui Zhang,Cheng-Yu He,Bao-Hua Liu,Yong-Zhi Zhang,Xiang-Hu Gao
Polymer-based materials emerge as promising building blocks for passive daytime radiative cooling (PDRC) due to their affordability and ease of production. Enhancing these polymers with inorganic particle doping has shown to boost their mechanical properties and light scattering ability, a result of the increased refractive index contrast with air. However, the incorporation of a single type of inorganic particle often falls short in optimizing overall performance. Herein, we introduce a novel approach by simultaneously integrating high refractive index zirconium dioxide (ZrO 2 ) and wide band gap silicon dioxide (SiO 2 ) dielectric particles into polydimethylsiloxane (PDMS) matrix. This dual-particle strategy synergistically improves the radiative cooling capabilities of the resulting photonic film. Remarkably, with a thickness of 1,000 μm, it achieves an impressive 96.7% reflection of solar irradiance , while maintaining a high emissivity of 95.2% in the atmospheric window . Under solar intensity of ∼836.7 W/m 2 , it delivers an average cooling power of 82.42 W/m 2 , achieving a substantial sub-ambient temperature drop of up to 8.26 °C. We further explored its effectiveness in enhancing freshwater collection efficiency, leveraging its radiative cooling properties. Furthermore, the photonic film also exhibits versatile properties including flexibility, hydrophobicity , thermal stability, color scalability, and weather resistance, thus enhancing its suitability for various practical applications.
研究领域:
材料科学
·
光学
·
纳米技术
·
高分子科学
·
热能工程
·
光子学
·
能源效率
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Nian Liu,Jingcun Shao,Jiahan Zhu,Wenhui Fan,Yi Zhao,Zheng Li,Hezheng Sun,Yajie Tian,Xin Yu
Zirconium dioxide (ZrO 2 ) is extensively investigated for the remediation of antibiotic pollution in aquatic environments, owing to its environmental compatibility and favorable electronic structure. However, its ultrawide band gap energy severely restricts visible-light harvesting and visible-light photocatalysis. To overcome these limitations, visible-light-active Zn/Zr 3+ -ZrO 2 and AgI@Zn/Zr 3+ -ZrO 2 nanostructures were synthesized through a calcination-chemical deposition strategy for levofloxacin degradation. The obtained AgI@Zn/Zr 3+ -ZrO 2 composites demonstrated a high specific surface area of approximately 100.65 m 2 g −1 and enhanced visible-light absorption, featuring a red-shifted absorption edge extending to approximately 460 nm. The AgI@Zn/Zr 3+ -ZrO 2 -30% heterojunction exhibited the highest photocatalytic levofloxacin degradation efficiency under visible-light irradiation, achieving a remarkable 80.51% degradation within 18 min. The apparent rate constant was 0.10042 min −1 , which was 5.66 times and 31.28 times of AgI (0.01772 min −1 ) and Zn/Zr 3+ -ZrO 2 (0.00321 min −1 ), respectively. Additionally, the AgI@Zn/Zr 3+ -ZrO 2 composites demonstrated remarkable cycling stability for levofloxacin degradation, retaining 94.67% of the initial performance after three reuse cycles. Crucially, Zr 3+ doping and Step-scheme (S-scheme) heterostructure synergistically enhances interfacial charge dynamics and chemical stability of the AgI@Zn/Zr 3+ -ZrO 2 composites, offering a viable design strategy for high-performance photocatalysis.
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Jing Yang,Liang Zhao,Chunze Liu,Yuanyuan Wang,Liyi Dai
Efficient catalytic ethanolysis and gasification of kraft lignin were conducted over a versatile supported catalyst Rh/La 2 O 3 /CeO 2 –ZrO 2 to give high-value aromatic alcohols and H 2 -rich gas. The removal of phenolic hydroxyl group was the most prevalent reaction, and importantly, almost no phenols, undesired char and saturating the aromatic ring were detected. Meanwhile, the feedstock and solvent both played key roles in H 2 generation that contributed to the hydrodeoxygenation of liquid components and made the whole catalytic process out of H 2 supply. Reusability tests of catalyst indicated that the crystalline phase transition and agglomeration of support, the loss of noble metal Rh and carbon deposition were the possible reasons for its deactivation in supercritical ethanol. Comparing with water, methanol and isopropanol system, ethanol was the only effective solvent for the depolymerization process.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）