Journal of Energy Storage
·
2022
·
IF 8.907
Tingting Liao,Fan Luo,Xianghui Liang,Shuangfeng Wang,Xuenong Gao,Zhengguo Zhang,Yutang Fang
As energy shortage intensifies, improving energy efficiency and reducing energy consumption have become essential topics. Herein, a form-stable composite phase change material (FCPCM) consisting of modified expanded graphite (MEG) and eutectic hydrate was designed as a reliable and efficient thermal energy storage medium. Firstly, novel binary eutectic hydrate involving oxalic acid dihydrate (H 2 C 2 O 4 .2H 2 O) and ammonium aluminum sulfate dodecahydrate (NH 4 Al(SO 4 ) 2 .12H 2 O) served as an excellent thermal energy storage guest. Zirconium dioxide (ZrO 2 ) was used as a hydrophilic modifier because of its high heat resistance, high inertness, corrosion resistance , non-toxicity and countless hydrophilic groups . Therefore, the hydrophilic modified expanded graphite (MEG) as a supporting host was constructed by dip-coating of nano ZrO 2 sol on the surface of expanded graphite (EG), which improved its hydrophilicity and compatibility with a eutectic guest. Compared with the original EG (83.05°), the contact angle of MEG containing 10 % ZrO 2 on the water was decreased to 37.95°. In addition, the adsorption rate and capacity of MEG to binary eutectic were much faster and larger, reaching an approximate saturation (65.58 %) within 40 min, which was three times that of the untreated EG (23.10 %) in the same adsorption time. The resultant FCPCM containing 24 wt% MEG exhibited a good phase transition temperature (54.10 °C), high phase transition enthalpy (168.5 J/g), as well as excellent anti-leakage behavior. After 100 hot and cold cycles, the thermal performances of FCPCM kept relatively stable, which guaranteed its sustained thermal benefits. It provides a potential application in the field of solar phase change heat exchangers .
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xinyang Zhang,Jiawei Liang,Zhaoxuan Fei,Yuzhou Zhao,Le Tong,Yonghui Han,Jinlong Wang,Daliang Xu,Han Zhang,Weijia Gong,Guibai Li,Jiaxuan Yang,Heng Liang
Membrane technology holds great potential for algae-laden water treatment, but membrane fouling and energy consumption hinder its scalability. Herein, we developed a hydrophilic ZrO 2 /Al 2 O 3 ceramic membrane and integrated it with hydrophobic microbubble enrichment, significantly improving filtration performance. Based on density functional theory, the adsorption energy of ZrO 2 /Al 2 O 3 ceramic membrane for water molecules was demonstrated to be −2.06 eV, and the membrane hydrophilicity was significantly enhanced. The experimental results revealed that the synergistic integration of hydrophobic microbubble enrichment and hydrophilic ceramic membrane filtration reduced the ceramic membrane's reversible and irreversible fouling resistance by 74.4 % and 76.0 %, respectively. In addition, the interactions between the altered algal flocs induced by hydrophobic microbubbles with both the membrane surface and the cake layer were weakened during the initial and later filtration phases. The free energy interaction between the algal flocs and the cake layer increased from −9.0 mJ/m 2 to 14.7 mJ/m 2 . The economic analysis further demonstrated that this synergistic approach not only enhanced biomass separation efficiency but also lowered operational costs, offering a scalable solution for sustainable biomass separation.
研究领域:
环境工程
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膜科学
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水处理技术
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材料科学
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可持续能源
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yongyuan Deng,Yichao Ye,Tao Yin,Jinyao Mai,Zhipeng Tian,Chao Wang,Ying Chen,Zhi Yang,Junling Tu,Riyang Shu
Hydrodeoxygenation (HDO) technology is an essential method for efficiently converting phenolic compounds from biomass into high-quality liquid fuels. Rationally designed catalysts not only significantly enhance stability and reaction rates, but also improve product selectivity and fuel quality. In this study, we proposed a Zr 3+ -defect-rich core–shell structured catalyst Ru@SiO 2 -ZrO 2 and employed it for the HDO of phenolic compounds and lignin pyrolysis oil. Ru nanoparticles are uniformly dispersed and have small particle sizes, showing outstanding catalytic hydrogenation activity. The porous SiO 2 shell possesses a high specific surface area with a high thermal stability, facilitating reactant transport and maintaining catalyst structural integrity. ZrO 2 serves as an acid modifier to enhance the catalyst acidity and promote the deoxygenation procedure. Besides, ZrO 2 enhances the adsorption of phenolic compounds and improves the cleavage of C-O bonds, due to its abundant oxygen vacancies . These factors make the catalyst achieved complete conversion of guaiacol to cyclohexane at mild reaction temperature of 240°C, which is superior to other similar reported results. Compared to conventional supported Ru/SiO 2 -ZrO 2 catalysts, the unique core–shell structure of Ru@SiO 2 -ZrO 2 obtained a sustained catalytic activity after five consecutive recycles without significant deactivation. Moreover, this core–shell catalyst exhibited good HDO performance for various phenolic compounds and lignin pyrolysis oil. The hydrocarbon content increased significantly from 12.7 % to 96.9 % in the upgrading of lignin pyrolysis oil, demonstrating the catalyst’s great potential for future industrial applications.
研究领域:
催化化学
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生物质能源
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材料化学
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绿色化工
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能源化学工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2025
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IF 6.1
Zhihui Zhang,Jianxin Deng,Shiyao Rong,Junyan Wang,Yichen Bao
To further enhance the lubrication performance of composite coatings, this study employed an electrospray masking in-situ forming technology to fabricate textured (CF x ) n /CaF 2 /C-ZrO 2 /TiO 2 composite coatings. Their microstructures, mechanical properties, and reciprocating wear behaviors were investigated. Results showed that this technique could directly create high-quality chessboard microtextures during coating fabrication, integrating multiple materials on a single surface. Compared to non-textured LT samples, the CBM samples demonstrated enhanced coating-substrate adhesion strength (132 N, increased by 11 %), low friction coefficient (~0.09, reduced by 18.2 %) and wear rate (~1.86 × 10 −7 mm 3 ·N −1 ·mm −1 , reduced by 42.4 %) at 25 °C, and excellent self-lubricating performance across 200–600 °C. Mechanism analysis revealed that the chessboard structure exhibited a synergistic effect with the coating materials.
研究领域:
材料科学
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表面工程
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2024
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IF 10.1
Yingjie Niu,Ting Li,Ali Hassan Bhatti,Jiaqi Qu,Xin Zhou,Li Luo,Francesco Barzagli,Chao'en Li,Rui Zhang
The use of solid acid catalysts for sorbent regeneration is an emerging approach to improve the energy efficiency of CO 2 capture processes. In this study, fly ash (FA), an industrial byproduct rich in acid/base sites, was chosen as a support material for the solid acid SO 4 2− /ZrO 2 (SZ) in the preparation of SZ@FA composite catalysts. Three catalysts with different mass ratios between SZ and FA were synthesized and evaluated in the regeneration process at 88 °C of a CO 2 -saturated MEA solution. Their desorption performance, expressed as CO 2 desorption rate, amount of CO 2 desorbed , and heat duty, was then compared with that obtained with unmodified FA, ZrO 2, and in the absence of catalysts (blank), under identical operating conditions. Compared to the uncatalyzed system, the SZ@FA composite catalysts showed significantly better desorption performance. In particular, SZ@FA-1/2 provided the highest values of desorption rate and cyclic capacity while reducing energy consumption by 45.4% compared to the blank system. It also demonstrated stability over 20 consecutive absorption-desorption cycles. Comparison with other reported catalysts highlighted the high performance of SZ@FA-1/2, particularly in terms of relative heat duty reduction, positioning it as a cost-effective and environmentally friendly choice for post-combustion capture applications.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2021
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IF 3.927
Yihang Dong,Zhaoyang Liu,Guoxing Qiu,Lipeng Pang,Ye Han,Shuyu Yao,Jianxu Ding,Xiangnan Wang
{(ZrO 2 ) 0.92 (Y 2 O 3 ) 0.08 } 1- x (Cr 2 O 3 ) x solid solution is composed by co-precipitation method and the effects of Cr 2 O 3 content on thermal analysis, crystal structure, microstructure and electrical conductivity are researched. The results discuss the potential for application as a diffusion barrier material at temperatures between 600 and 850 °C to the limiting current oxygen sensors. TG and DSC results show that the main weight loss and heat absorption processes occur below 600 °C and the {(ZrO 2 ) 0.92 (Y 2 O 3 ) 0.08 } 1- x (Cr 2 O 3 ) x solid solution is obtained above 600 °C. XRD analysis shows that the solid solution is fluorite type cubic phase and the solubility of Cr 2 O 3 in (ZrO 2 ) 0.92 (Y 2 O 3 ) 0.08 is less than 0.10. The SEM-EDS results show that the grain size of the sintered body decreases with increasing Cr 2 O 3 content and distribution of each element is uniform. The conductivity of solid solution decreases first and then increases as Cr 2 O 3 doping content, reaches the maximum value of 4.33 × 10 −3 S cm −1 at 850 °C. The doping of Cr 2 O 3 is beneficial to improve the conductivity of the solid solution at low temperature.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 38
·16526-16536
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IF 3.288
Xufeng Bai,Ting Ren,Jingbo Mao,Shenmin Li,Jingmei Yin,Jinxia Zhou
Cellulose-derived levulinic acid (LA) can be converted into gamma-valerolactone (GVL), a sustainable platform chemical for the production of bio-based chemicals. However, LA as an organic acid causes severe metal leaching during the heterogeneous hydrogenation of LA to GVL, especially in the presence of water. Various endeavors for preventing metal leaching have focused more on the process and less on the intrinsic nature of catalysts. The aim of this work is to derive a novel metal-leaching-resistant catalyst for the aqueous-phase hydrogenation of LA into GVL by using a nanocomposite containing three components, Ag, ZrO2, and graphene oxide (GO). The AgZrO2GO catalyst without pre-reduction treatment resulted in complete conversion of LA and approximately 100 mol% selectivity to GVL in the aqueous reaction, and metal leaching from the catalyst was completely eliminated. The relationship between the catalytic performance and the distinct physicochemical properties of the catalyst was extensively discussed.
研究领域:
化学工程
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催化材料
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Wen Li,Kuncan Wang,Junjie Huang,Xiao Liu,Dun Fu,Jiale Huang,Qingbiao Li,Guowu Zhan
Metal–organic frameworks have been exploited as excellent solid precursors and templates for the preparation integrated nanocatalysts with multicomponent and hierarchical structures. Herein, a novel synthetic protocol has been developed to fabricate versatile Zr-based solid solutions (such as ZnO–ZrO2, Co3O4–ZrO2, and CuO–ZrO2) via pyrolysis of Schiff base-modified UiO-66 octahedrons (size <100 nm), which were then utilized as efficient catalysts for CO2 hydrogenation. The Schiff base serves as an effective bridge to dope secondary metal ions into UiO-66 frameworks with controlled amounts of 0.13–8.8 wt %, which are initially hard to achieve. Interestingly, by simply changing the loading metal ions, the selectivity of C1 hydrogenation products can be facilely tuned. For instance, the maximum CO2 conversion of ZnO–ZrO2, Co3O4–ZrO2, and CuO–ZrO2 solid solutions were 5.8, 11.4, and 22.5%, with the main product selectivity of 70% CH3OH, 92.5% CH4, and 86.7% CO, respectively. Moreover, in situ diffuse reflectance infrared Fourier transform spectra characterization reveals that the significant difference in C1 product selectivity is mainly determined by the balance of *HCOO, *CH3O, and *CO intermediate species over the Zr-based solid solutions.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 11
·8247-8261
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IF 3.442
Wang Shuzhan,Zhou Shaofeng,Huang Jin,Zhao Guizhe,Liu Yaqing
ZrO 2 nanoparticles were electrostatic self-assembled on the surface of graphene oxide (GO) for enhancing the mechanical and tribological properties of phenolic resin. Zeta potential analysis and structural characterization confirmed that ZrO 2 nanoparticles had been successfully adhered onto the surface of GO, and the as-prepared ZrO 2 @GO nanohybrid possessed good dispersity. The results showed that filling 1.5 wt% ZrO 2 @GO nanohybrid could improve the flexural strength, flexural modulus and impact strength of phenolic resin (PF) by 38.6%, 10.7% and 8.3%, respectively. When 0.5 wt% ZrO 2 @GO was added, the initial decomposition temperature and the residual content at 800 °C of PF increased by 20.0% and 16.9%, respectively. The ZrO 2 @GO nanohybrid also exhibited synergistic effect for improving the tribological performance of PF effectively, that when adding 0.5 wt% ZrO 2 @GO nanohybrid, the average friction coefficient and wear rate of the composites reduced by 21.8% and 30.6%, respectively. SEM observation and 3D non-contact surface topography analysis showed the wear surface of ZrO 2 @GO nanohybrid filling PF composite was smooth, low spalling and shallowly grooved with the typical characteristic of abrasive wear. It was explained that the ZrO 2 @GO nanohybrid could play the role of rolling bearings, form stable and smooth friction transfer film and enhance the interfacial interaction, thus indicated the synergistic wear-resisting performance for PF matrix. It provides a green, convenient and fast method for preparing ZrO 2 nanoparticles-attached GO nanohybrid that can enhance the mechanical and tribological performance of resin-based materials effectively.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 94
·期 7
·2355-2363
·
IF 2.659
Hui-Fang Ren,Dan Zhu,Ji-Fan Li,Chun-Ling Liu,Rong-Zhen Yang,Wen-Sheng Dong
BACKGROUND The chemical catalytic conversion of carbohydrates into γ-valerolactone (GVL) is a sustainable alternative to the petrochemical process starting from the depleting fossil resources. Direct conversion of carbohydrates (fructose, glucose, starch and cellulose) into GVL was achieved via the combined heteropoly acid based SO 3 H-functionalized ionic liquid (HAIL) and supported ruthenium (Ru) catalyst system in one pot and in water media. RESULTS A 63% GVL yield (based on fructose) was obtained under the catalysis of 1-methyl-3-(3-sulfopropylimidazolium)silicotungstate ([MIMPS] 4 SiW) and Ru/ZrO 2 at 180 °C, first in 0.1 MPa nitrogen (N 2 ) for 3 h (dehydration), and then in 4 MPa hydrogen (H 2 ) for 10 h (hydrogenation). Under the same reaction conditions, the GVL yields from glucose, starch and cellulose were 68%, 60% and 60%, respectively. The recyclability of the catalytic system consisting of [MIMPS] 4 SiW and Ru/ZrO 2 was investigated in four runs. The activity for [MIMPS] 4 SiW did not change after use. Partial deactivation of Ru/ZrO 2 was observed, which was ascribed to the severe carbon deposition. CONCLUSIONS In the present method, HAIL and Ru/ZrO 2 catalysts were loaded together. No separation and/or neutralization step reported in the literature was needed and only an atmosphere change (from N 2 to H 2 ) step was involved. Therefore, we provide a promising method for efficient conversion of carbohydrates into GVL. © 2019 Society of Chemical Industry
研究领域:
化学工程
·
可再生资源转化
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Qingxiang Wang,Feng Gao,Xuan Zhang,Bin Zhang,Shunxing Li,Zhengshui Hu,Fei Gao
A composite film that contained CeO 2 –ZrO 2 hollow nanospheres and chitosan was deposited on a gold electrode using a one-step electrodeposition based on the pH-dependent solubility of chitosan. Electrochemical characterization experiments showed that the electroactive surface of the modified electrode was significantly enhanced by the introduction of the CeO 2 –ZrO 2 nanospheres into the chitosan gel during electrodeposition . Furthermore, an electrochemical DNA biosensor was fabricated based on the synergistic affinity of CeO 2 –ZrO 2 and chitosan in the nanocomposite film to probe DNA . DNA hybridization assays suggested that the target DNA could be quantified over a wide dynamic range of 1.63 × 10 −13 M–1.63 × 10 −8 M with a detection limit of 1.0 × 10 −13 M using methylene blue as an electrochemical indicator. This work describes a simple strategy for the preparation of a stable and conductive interface for electrochemical detection of DNA hybridization and opens a path for the application of CeO 2 –ZrO 2 nanospheres and chitosan in DNA electrochemical biosensing analysis.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2014
·
IF 6.007
Moa Z. Granlund,Kjell Jansson,Marita Nilsson,Jazaer Dawody,Lars J. Pettersson
The objective of this paper was to study the influence three promoters (Co, La, Mn) had on the catalytic activity of Rh-based catalysts for autothermal reforming of diesel. The catalysts were supported on CeO 2 -ZrO 2 and the loading was 1 wt.% Rh and 6 wt.% promoter. The catalytic activity was evaluated in a monolith bench scale reactor with Swedish Environmental diesel, MK1. The process parameters employed at the ATR experiments were; O 2 /C ∼ 0.45, H 2 O/C ∼ 2.5 and GHSV ∼ 50,000 h −1 , meanwhile the reactor temperature was ramped from 700 °C to 950 °C. The catalysts were compared based on their fuel conversion, H 2 yield and the selectivity of different short-chain hydrocarbons. The results showed that all three catalysts had both high fuel conversion and H 2 yield in the optimal ATR operation temperatures. The H 2 yield and fuel conversion were increasing in the order Rh/Mn, Rh/La, Rh/Co. To get further insight in the difference between the materials the fresh and aged catalytic materials were characterized. The characterization methods used were H 2 -temperature programmed reduction (H 2 -TPR), powder X-ray diffraction (XRD), and BET surface measurements. The BET surface measurements showed that promotion with La gave improved thermal stability of the material. The XRD showed a high dispersion of all metals except Co, which was present as crystals in the size range of the particles of the support.
研究领域:
催化
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）