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
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
CATALYSIS TODAY
·
2014
·
IF 3.309
Huiling Li,Aojie Deng,Junli Ren,Changyu Liu,Wenju Wang,Feng Peng,Runcang Sun
One of the most promising strategies for furfural production is to extract continually the target product from the aqueous solution utilizing organic solvents. With the aim to develop an ecologically viable catalytic pathway for furfural production without the addition of mineral acids, we presented a modified biphasic system using a solid acid (SO 4 2− /TiO 2 -ZrO 2 /La 3+ ) as catalyst for producing furfural from xylose. Different kinds of aprotic organic solvents (DMSO, DMF and DMI) in water phase and 2-butanol in organic phase (MIBK) were investigated as reaction media. Furfural yield and xylose conversion efficiency were dependent on the amounts of aprotic organic solvents and 2-butanol, the solid/liquid ratio, and the volume ratio of the organic phase and the aqueous phase as well as the reaction temperature and time. As a result, DMI showed the best performance on improving furfural yield during the furfural production. 3563.3 μmol of furfural/g of xylose with 97.9% xylose conversion efficiency was obtained after 12 h at 180 °C when the volume ratios of water to DMI and MIBK to 2-butanol were 8:2 and 7:3, respectively.
研究领域:
生物化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Sishi Long,Yunchao Feng,Binglin Chen,Lihui Gan,Xianhai Zeng,Minnan Long,Jian Liu
Zr-carbon aerogel (Zr-DCCA) was prepared by using renewable deep eutectic solvents (DESs) and cellulose nanofiber as sacrifice templates. The Zr-DCCA shows high conversion, selectivity and stability for the transfer hydrogenation of various biomass aldehydes to alcohols. While lower catalytic performance was obtained using Zr-based carbon aerogel (Zr-CCA) prepared without DESs in precursors. A series of characterizations showed that Zr-DCCA possesses the higher dispersion and smaller size of ZrO 2 nanoparticles and thus shows stronger acid/base properties than Zr-CCA. In addition, traditional stirring for the reaction and centrifugation for recycling are not required, which simplifies equipment and operations, making the process more valuable to practice.
研究领域:
材料科学
·
催化化学
·
可再生资源利用
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 18
·10863-10874
·
IF 10.7
Daoxi Wang,Haiting Shi,Wenhui Cui,Hao Li,Jiarong Niu,Shuo Wang,Zhiwei Xu
Li-argyrodite solid-state electrolytes (SSEs) have attracted much attention owing to their high ionic conductivity and low-cost raw materials. However, achieving high lithium-metal compatibility and air stability along with high ionic conductivity remains a challenge. Herein, novel Li6+xP1−xZrxS5−2xO2xCl (0 ≤ x ≤ 0.15) Li-argyrodite SSEs were synthesized via ZrO2 doping. X-ray and neutron diffraction results from Rietveld refinement confirmed the successful substitution of P and S sites in the Li6PS5Cl structure by the ZrO2 dual dopant. The optimized best composition of Li6.05P0.95Zr0.05S4.9O0.1Cl had a high ionic conductivity of 3.97 mS cm−1 and a high ionic mobility number (0.986). Notably, the modified electrolyte exhibited more compatibility with lithium metal compared to the pristine Li6PS5Cl. It also exhibited an ultra-high critical current density (1.7 mA cm−2) and ultra-long cycling performance (800 h, 0.1 mA cm−2) relative to pristine Li6PS5Cl (0.6 mA cm−2) and excellent direct current cycling performance at 0.5 and 0.85 mA cm−2. In addition, the good structural stability after exposure to humid air for a certain period of time, low H2S release, and decrease in ionic conductivity indicated its excellent air stability. Finally, the assembled all-solid-state battery exhibited an initial discharge capacity of 115.9 mA h g−1 at 0.05C magnification and a high capacity retention (79.3%) after 100 cycles. Therefore, Li-argyrodite SSEs with ZrO2 substitution may be a prospective candidate in the future exploration of electrolytes with excellent overall performance.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 16
·2107401
·
IF 15.153
Qiang Luo,Yunhong Li,Xiaobing Huo,Jinyang Li,Linqian Li,Wei Wang,Yilan Li,Shipeng Chen,Yinqiao Song,Ning Wang
The generation of undesired biofouling in medical and engineering applications results in a reduction in function and durability. Copying functionalities of natural enzymes to combat biofouling by artificial nanomaterials is highly attractive but still challenged by the inferior catalytic activity and specificity principally because of low densities of active sites. Here, an innovate strategy is demonstrated to stabilize high-density ultrasmall ceria clusters on zirconia for biofouling prevention. Benefiting from the unique structure, CeO 2 @ZrO 2 nanozyme can significantly enhance the haloperoxidase-mimicking activity in catalyzing the oxidation of bromide with H 2 O 2 into biocidal hypobromous acid as a result of abundant defects and surface strong acidity sites, inducing impressive antibacterial and antibiofouling capacity compared with that of pristine CeO 2 . This work is expected to open a new avenue for the rational design of cluster catalysts for various targeting catalytic applications.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2021
·
IF 5.541
Yang Li,Bin Hu,Salman Raza Naqvi,Zhen-xi Zhang,Kai Li,Qiang Lu
5-Hydroxymethylfurfural (5-HMF) is a value-added platform chemical, which can be obtained from pyrolysis of biomass materials, whereas related investigation on its selective production via catalytic fast pyrolysis (CFP) process is still insufficient. In this work, a zirconium-tin mixed metal oxide (ZrO 2 -SnO 2 ) catalyst was developed for the selective production of 5-HMF from the in-situ CFP of cellulose. According to pyrolysis-chromatography/mass spectrometry (Py-GC/MS) tests, the ZrO 2 -SnO 2 catalyst has better performance on the selective preparation of 5-HMF than single nano oxide ZrO 2 , SnO 2 , or their physical mixture. 5-HMF was sensitive to the reaction conditions, and its yield and selectivity always exhibited the tide of first increasing followed by decreasing along with the increase of Zr loading and catalyst-to-cellulose (CA-to-CL) ratio. At the optimum conditions with ZrO 2 -SnO 2 of 15 wt% Zr loading (ZrO 2 -SnO 2 -15), pyrolysis temperature of 350 °C and CA-to-CL ratio of 2:1, the 5-HMF yield was 6.49 wt%, which was 4 times more than that of the non-catalytic process (1.35 wt%). Correspondingly, the selectivity of 5-HMF was up to 23.50 %. The catalyst characterization combined with the pyrolysis texts of several typical saccharides, including cellobiose, maltose, glucose, and mannose indicated that the ZrO 2 -SnO 2 -15 could promote the breakage of glycosidic bonds with the formation of reducing ends and the selective conversion of the reducing end to 5-HMF due to its mild acidity. Overall, the ZrO 2 -SnO 2 is expected a promising catalyst for the CFP of cellulose to prepare 5-HMF.
研究领域:
化学工程
·
催化
·
生物质转化
·
可再生能源
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Shuxing Zhang,Jiali Zheng,Zhihui Li,Xiaoshu Ding,Yanji Wang
Herein, we reported a green catalytic reaction system for the synthesis of 5-amino-1-pentanol with furfural and ionic liquid hydroxylamine salt as the initial raw material. In addition, the method can obtain 2-furonitrile and furfurylamine in high yields. The reaction system comprises three new reactions, including the reaction of furfural with ionic liquid hydroxylamine salt to synthesize 2-furonitrile, the hydrogenation of 2-furonitrile to prepare furfurylamine, and the hydrogenolysis of furfurylamine to prepare 5-amino-1-pentanol. For the synthesis of 2-furonitrile, ionic liquid hydroxylamine salt (NH 2 OH) 2 ·[HSO 3 - b - mim ]·HSO 4 was prepared. The ionic liquid as co-solvents, catalysts, and hydroxylamine stabilizer has recovery and reusability. For the hydrogenation of 2-furonitrile to furfurylamine, high-efficiency Ru/g-C 3 N 4 catalyst was prepared. For the hydrogenolysis of furfurylamine to 5-amino-1-pentanol, high-efficiency Pt/ZrO 2 catalyst was prepared. Finally, the yield of 5-amino-1-pentanol based on furfural was 48.7%. A potential pathway for preparing drugs from biomass has been identified in this work.
研究领域:
化学工程
·
催化
·
绿色化学
·
有机合成
·
生物质转化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2012
·
IF 2.289
Fang Yuan,Jianxin Wang,He Miao,Cunxin Guo,Wei Guo Wang
The ternary system (Yb 2 O 3 ) x –(Sc 2 O 3 ) (0.11− x ) –(ZrO 2 ) 0.89 ( x = 0–0.11) specimens have been prepared using a co-precipitation method. The properties of this series of samples are affected by the ytterbium element. A stabilized cubic phase is obtained at room temperature by introducing ytterbium and the unit cell parameters show a linear increasing relationship with content of Yb 2 O 3 , which also contributes to abatement of the conductivity from 0.099 S/cm to 0.020 S/cm at 800 °C. However, the conductivity tends to remain a constant at lower temperatures ranging from 500 °C to 650 °C as the addition of Yb 2 O 3 is reduced to below 3 mol%, achieving high up to 0.015 S/cm at 650 °C for a 3Yb8ScSZ body, indicating a potential to be utilized as an electrolyte material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zhao-Mu Zhang,Jia-Hong Li,Yan-Neng Liang,Yuan Gao,Cheng-Xin Li
ScSZ is one of the traditional electrolyte candidates for solid oxide fuel cells (SOFCs) due to its excellent ionic conductivity. Nevertheless, its complex phase structure and high sintering temperature hinder further development. Herein, the effects of Yb 2 O 3 and Al 2 O 3 doping on conductivity and sintering ability as well as the long-term stability in ScSZ electrolyte are studied and discussed in detail. XRD and EIS tests revealed that the ZrO 2 electrolyte stabilized by 1 mol% Yb 2 O 3 and 10 mol% Sc 2 O 3 achieved a stable phase structure and high conductivity. Subsequently, the addition of 0.1 mol% Al 2 O 3 sintering aid reduced the densification temperature by more than 100 °C, achieving a density of over 96 % without significant decrease in ionic conductivity, with values of 0.12 S cm −1 in air at 750 °C. Long term stability test reveals that the ScSZ electrolyte doped with Yb 2 O 3 and Al 2 O 3 maintains a stable phase structure and exhibits no significant degradation in electrical performance after being held at 800 °C for 1080 h. In conclusion, the Yb 2 O 3 doped ZrO 2 electrolyte with 0.1 mol% Al 2 O 3 sintering aids exhibits a potential candidate material used in SOFCs.
研究领域:
材料科学
·
能源技术
·
固态离子学
·
燃料电池
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Yuannong Qu,Ji Zou,Weimin Wang,Wei Ji,Zhengyi Fu
The h-BN/ZrO 2 composites for preparing ceramic side sealing plate were obtained with spark plasma sintering (SPS) at 1700 °C for 10 min in the study. By varying AlN content from 0 to 20 wt%, we systematically explored its influence on sintering behavior, microstructure evolution, mechanical performance, and corrosion mechanism at1600 °C. Results show that the rapid heating and uniaxial pressure during SPS and the in-situ reactions between AlN and ZrO 2 promoted the densification of composites. The main reaction products were ZrN, which acted as an effective oxygen scavenger, consuming dissolved oxygen ([O]) and converting into ZrO 2 . These newly formed ZrO 2 particles filled residual porosity within the matrix and nucleated around pre-existing ZrO 2 grains, progressively coalescing into continuous Zr-rich barrier layer.Thereby preventing molten steel from further penetrating into the matrix. The corrosion depth of the composite with 5 wt% AlN content in molten steel at 1600 °C after 2 h was only 69 μm. Meanwhile, it showed a thermal conductivity of 25 W m −1 K −1 and a coefficient of thermal expansion of 3.7 × 10 -6 K −1 , demonstrating excellent thermal shock resistance. The composites are expected to be used to manufacture side sealing plates for the novel continuous casting of thin strip.
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
危险品化学品经营许可证（带存储）