MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Enbo Li,Yu Bai,Peng Zhang,Hongxia Liu,Wen Ma,Yingwei Qi,Te Wang,Ziqian Zhang,Sinan Gao
Electronic structure adjustment on materials' surfaces often leads to materials obtaining novel performances. Flake Al powder is a classical low infrared emissivity material at room temperature. However, this powder shows intense infrared radiation over 500 °C due to its high-temperature oxidation , which restricts flake Al powder's application as low infrared radiation material in higher temperatures. For this reason, the Al@ZrO 2 composite was prepared by a solvothermal method to improve its thermostability. This composite can be used as low infrared radiation material over 500 °C for the long term, even at 700 °C for a short time. According to the experimental and theoretical investigation, a delocalization bond of Al–O–Zr is formed in the interface between the Al surface and ZrO 2 so that the Al surface's electronic structure is adjusted. This change of electronic structure weakens the electroaffinity of Al atoms to bond with the electron-rich groups, and the oxidation reaction of Al needs to proceed in a higher-temperature range. In this case, flake Al powder coating with ZrO 2 holds its metal properties with low infrared emissivity over 500 °C. The Al@ZrO 2 composite could be used in a higher temperature range as a low infrared radiation material.
研究领域:
材料科学
·
表面工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Lei Liu,Yong Wang,Chenye Gao,Cheng Yang,Ke Wang,Haibin Li,Haitao Gu
Coating inorganic ceramic particles on commercial separators with organic binders attracts significant interest as a facile and effective modification method to enhance the thermal-resistance characteristics of the separators. Nevertheless, this method still suffers from some inherent limitations, involving the desquamation of binders soaked in the electrolytes and a significant thickness increase caused by ceramic coatings . Herein, we introduce self-assembled nano-thick ZrO 2 ceramic coatings onto a polypropylene (PP)/polyethene (PE)/PP separator using a dopamine hydrophilic modification and a subsequent surface sol-gel process. In comparison with the pristine separator, the modified separator exhibits excellent mechanical properties, favorable electrolyte wettability , enhanced thermal-resistance characteristics, elevated ionic conductivity and smaller electrochemical impendence. At high temperature (55 °C), the LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA)//Li coin cell based on S–10ZrO 2 exhibits the highest specific capacity of 203.7 mAh g −1 , which is higher than that of the NCA//Li coin cell using the PP/PE/PP separator. In addition, the reserve experiments at various high temperatures reveal that the cells with S–10ZrO 2 are more stable than the others, holding 4.08 V even for 12 h of storage at a high temperature of 120 °C.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 27
·275201
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IF 3.5
Muhammad Amin Padhiar,Yongqiang Ji,Minqiang Wang,Shusheng Pan,Sayed Ali khan,Noor Zamin Khan,Lei Zhao,Fangrong Qin,Zhuan Zhao,Shaolin Zhang
Perovskite nanocrystals (NCs) feature adjustable bandgap, wide absorption range, and great color purity for robust perovskite optoelectronic applications. Nevertheless, the absence of lasting stability under continues energization, is still a major hurdle to the widespread use of NCs in commercial applications. In particular, the reactivity of red-emitting perovskites to environmental surroundings is more sensitive than that of their green counterparts. Here, we present a simple synthesis of ultrathin ZrO2 coated, Sr2+ doped CsPbBrI2 NCs. Introducing divalent Sr2+ may significantly eliminate Pb° surface traps, whereas ZrO2 encapsulation greatly improves environmental stability. The photoluminescence quantum yield of the Sr2+-doped CsPbBrI2/ZrO2 NCs was increased from 50.2% to 87.2% as a direct consequence of the efficient elimination of Pb° surface defects. Moreover, the thickness of the ZrO2 thin coating gives remarkable heat resistance and improved water stability. Combining CsPbSr0.3BrI2/ZrO2 NCs in a white light emitting diode (LED) with an excellent optical efficiency (100.08 lm W−1), high and a broad gamut 141% (NTSC) standard. This work offers a potential method to suppress Pb° traps by doping with Sr 2+and improves the performance of perovskite NCs by ultrathin coating structured ZrO2, consequently enabling their applicability in commercial optical displays.
研究领域:
材料科学
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光学工程
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
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IF 3.131
Gang Yu,Kuo Han,Jing Wang,Xiao Cheng,Hongmei Ma,Hongya Wu,Zhigang Yang,Guanglei Zhang
In the present work, the activated carbon fibers (ACFs) with homogenous and crystalline CeO 2 -ZrO 2 coatings were obtained using a facile water steam treatment process at a low temperature (300 °C) for efficient removal of Pb(II) from aqueous solutions. The morphology, surface chemical states, and adsorption performance were studied extensively. Results demonstrated that the steam-treated CeO 2 -ZrO 2 /ACFs possessed superior high surface areas (783.23 m 2 g −1 ) and pore volumes (0.41 cm 3 g −1 ). Moreover, numerous C-O-M bonds formed in the interface between CeO 2 -ZrO 2 coatings and ACFs, which can endow the adsorbent desired mechanical property and service durability as well as many surface hydroxyl groups were found and adsorption capacity (61.54 mg g −1 at pH 6.5 ± 0.3 and 25 °C). It was suggested that the steam-treated CeO 2 -ZrO 2 /ACFs could be considered as a promising adsorbent towards wastewater treatment .
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
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ying Mu,Liwen Yan,Peisen Liu,Qichao Gao,Anran Guo,Xiaojing Xu,Haiyan Du,Shun Dong,Jiachen Liu
As a critical structure of thermal protection systems, flexible fibre insulation felts are widely used on the leeward surface of spacecrafts. To enhance the thermal resistance of flexible fibre felts, SiC w -ZrO 2 coatings with different SiC whisker (SiC w ) contents were fabricated on the surface of a high-silica-fibre fabric (HSFF) by employing a sol-gel method combined with a spraying route. The introduction of SiC w having a length of 10–50 μm effectively improved the coating integrity. After calcination at 1000 °C for 1 h, the SiC w -ZrO 2 coating containing 8 wt% SiC w did not damage the tensile strength and flexibility of the fibre fabric, and the interfacial bonding strength between the coating and HSFF reached 0.40 MPa, benefitting from the whisker toughening mechanism. The SiC w -ZrO 2 coating with a high emissivity of 0.96 in the 2–14 μm wavelength range reduced the surface temperature of the flexible insulation felt by approximately 300 °C when a butane torch was applied at above 1300 °C.
研究领域:
材料科学
·
航空航天工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhongyang Zheng,Heping Li,Fangjian Li,Liyu Zheng,Shenming Yin,Xinyun Wang,Youwei Yan
Two-dimensional materials, impermeable to various mediums, have ignited the great interest in developing multifunction nanocomposite coatings. Even though Al 2 O 3 has excellent thermal and chemical stability, it is hard to obtain Al 2 O 3 nanosheets from their non-lamellar structured bulk counterparts. In this work, we have developed a bottom–up strategy to synthesize several-nanometer thick Al 2 O 3 nanosheets by taking graphene oxide as the templates, and further improved their dispersibility by modifying them with poly-dopamine (PDA). These PDA-modified Al 2 O 3 nanosheets were then successfully integrated into the nanosized ZrO 2 coating to enhance its anti-corrosion and gas permeation reduction properties. With the Al 2 O 3 nanosheets inserted, corrosion resistance and deuterium resistance of the ZrO 2 coating were increased by 1000% and 1557%, respectively, both of which were above two orders of magnitude higher than that of the 321 steel substrate. The significant improvements achieved by Al 2 O 3 nanosheets demonstrate their capacity to effectively block the diffusion of both ions and deuterium atoms. This work not only offers a new platform for fabricating nanosheets from non-lamellar structured materials, but also indicates tremendous potential of Al 2 O 3 nanosheets as a novel filler for developing high-performance functional coatings.
研究领域:
材料科学
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表面工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Batteries-Basel
·
2022
·Vol. 8
·期 9
·115
·
IF 5.938
Yuteng Gong,Chengxin Yu,Yu Li,Ji Qian,Chuan Wu,Ying Bai
Hard carbon (HC) has attracted extensive attention due to its rich material source, environmental non-toxicity, superior sodium storage capacity, and lower sodium storage potential, and is considered most likely to be a commercial anode material for sodium-ion batteries (SIBs). Nevertheless, the limited initial Coulombic efficiency (ICE) of HC is the main bottleneck hindering its practical application. To alleviate this issue, herein, a ZrO2coating was skillfully constructed by using a facile liquid phase coating method. The ZrO2coating can act as a physical barrier to prevent direct contact between the HC surface and the electrolyte, thus effectively reducing irreversible sodium adsorption and inhibiting the continuous decomposition of the electrolyte. Meanwhile, this fresh interface can contribute to the generation of a thinner solid electrolyte interface (SEI) with high ionic conductivity. As a result, the ICE of the ZrO2-coated HC electrode can be optimized up to 79.2% (64.4% for pristine HC). Furthermore, the ZrO2-coated HC electrode delivers outstanding cyclic stability so that the capacity retention rate can reach 82.6% after 2000 cycles at 1 A g−1(55.8% for pristine HC). This work provides a flexible and versatile surface modification method to improve the electrochemical property of HC, and hopefully accelerate the practical application of HC anodes for SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiangtao Li,Yunjia Xue,Xueying Zhang,Fan Zhang,Wenhao Hu,Jiachen Liu
The SiC-ZrO 2 coating was prepared on the surface of aluminosilicate ceramic fiber fabric (ASFF) to enhance the radiation heat dissipation. However, the Si-sol in the SiC-ZrO 2 coating caused the fiber to adhere together at high temperatures. The brittle fracture of the ASFF led to a deterioration in its temperature resistance. In this paper, an Al 2 O 3 interface was prepared on the surface of ASFF by spraying alumina precursor. The Al 2 O 3 interface prepared by 3.0 wt% alumina precursor was uniformly covered on the fiber surface. The flexibility of ASFF/Al 2 O 3 /SiC-ZrO 2 was maintained after static oxidation at 1300 °C for 1 h. The tensile strength of ASFF/Al 2 O 3 /SiC-ZrO 2 at 1200 °C were increased from 5 to 7 MPa to 21.35 ± 2.58 MPa. The Al 2 O 3 interface not only limited the direct contact between Si-gel and fiber, but also reacted with Si-gel to produce mullite at high temperature. The problem of fiber adhesion caused by Si-sol in ASFF matrix was solved. Additionally, the SiC-ZrO 2 coating reduced the surface temperature of ASFF rom 1700 °C–1300 °C. Combining the radiation performance of SiC-ZrO 2 coating and the isolation effect of the Al 2 O 3 interface, ASFF/Al 2 O 3 /SiC-ZrO 2 was able to operate continuously for 300 s under the 1700 °C butane-oxygen flame heating condition.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）