Oxide-water interaction and wetting property of ceria surfaces tuned by high-temperature thermal aging
Oxide-water interaction and wetting property of ceria surfaces tuned by high-temperature thermal aging
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高温热老化调节二氧化铈表面的氧化-水相互作用和润湿性能
DOI：
10.1016/j.apsusc.2021.149658
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发表时间：
2021-07
影响因子：
6.7
通讯作者：
Yuqi Jin
中科院分区：
文献类型：
--
作者：
Yanlong Wang;Qin Zhou;Leilei Kang;Liang Yang;Han Wu;Zhiwen Zhou;Chuanhai Xiao;Jianping Guo;Fan Yang;Shaoqian Zhang;Gang Li;Yuqi Jin
镧系稀土氧化物具有高透光率、环境稳定性和与水的独特相互作用，因此有望用于各种应用，如下一代自清洁涂料。然而，由于缺乏在良好受控环境中的分子水平研究，镧系氧化物中异常疏水性的潜在机制仍然存在争议，这极大地限制了将其润湿性工程化以用于更广泛的技术应用的可能性。本文通过原位X射线光电子能谱、傅里叶变换红外光谱和水接触角的测量，系统地研究了氧化铈薄膜在环境控制条件下的润湿行为。结果表明，氧化铈表面的疏水性主要是由吸附的碳氢化合物贡献的，羟基化程度越高，氧化铈表面的润湿性越好。基于润湿性对表面污染的显着依赖性，我们进一步开发了原位退火方法，通过去除碳氢化合物污染来显着改善氧化铈粉末的水分解性能。这些结果表明，通过高级氧化去除表面污染物是促进氧化铈薄膜水解离的关键因素，为氧化铈薄膜润湿性的控制和基于氧化铈薄膜的高性能器件的设计提供了新的思路。
The high transmittance, environmentally robust, and unique interaction with water make lanthanide series rareearth.oxides promising for various applications such as next-generation self-cleaning coatings. However, the.underlying mechanism of the anomalous hydrophobicity in lanthanide oxides remains controversial due to the.lack of molecular-level studies in a well-controlled environment, which greatly limits the possibility to engineer.their wettability for broader technical applications. Here, we systematically studied the mechanism that governs.the wetting behaviors of ceria films by in-situ X-ray photoelectron spectroscopy, Fourier-transform infrared.spectroscopy, and water contact angle measurements under the environmentally controlled conditions. It was.found that the hydrophobicity of ceria was mainly contributed by the adsorbed hydrocarbon, and the wettability.could be enhanced on cleaner ceria surfaces with more degree of hydroxylation. Based on the significant.dependence of wetting property on surface contamination, we further developed an in-situ annealing method to.significantly improve the water-splitting performance of ceria powders by removing hydrocarbon contamination..These results suggest that the removal of surface contamination by high-grade oxidation is the key factor to.facilitate the water dissociation of ceria films, providing new insights into the control of their wetting property.and design of high-performance devices based on ceria films.
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影响因子：
6.7
作者：
Zhourong Xiao;Shuangshang Ji;Yueting Li;Fang Hou;Haocui Zhang;Xiangwen Zhang;Li Wang;Guozhu Li
通讯作者：
Zhourong Xiao;Shuangshang Ji;Yueting Li;Fang Hou;Haocui Zhang;Xiangwen Zhang;Li Wang;Guozhu Li
影响因子：
3.8
作者：
Brown, Gordon E., Jr.;Calas, Georges
通讯作者：
Calas, Georges
影响因子：
6.7
作者：
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通讯作者：
L. Savio;K. B. Bhavitha;G. Bracco;G. Luciano;D. Cavallo;G. Paolini;S. Passaglia;G. Carraro;L. Vattuone;R. Masini;M. Smerieri
影响因子：
3.9
作者：
Bae, Jongyoon;Samek, Izabela A.;Snurr, Randall Q.
通讯作者：
Snurr, Randall Q.
影响因子：
5.4
作者：
Zhenfu Shi;P. Shum;Zhifeng Zhou;L. Li
通讯作者：
Zhenfu Shi;P. Shum;Zhifeng Zhou;L. Li