Thin Films of Thermally Stable Ordered Mesoporous Rh2O3(I) for Visible-Light Photocatalysis and Humidity Sensing
Thin Films of Thermally Stable Ordered Mesoporous Rh2O3(I) for Visible-Light Photocatalysis and Humidity Sensing
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用于可见光光催化和湿度传感的热稳定有序介孔 Rh2O3(I) 薄膜
DOI:
10.1021/acsanm.9b01654
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发表时间:
2019
影响因子:
5.9
通讯作者:
T. Brezesinski
中科院分区:
文献类型:
--
作者:
L.A. Dubraja;D. Boll;C. Reitz;D. Wang;D. Belić;A. Mazilkin;B. Breitung;H. Hahn;M.T. Elm;T. Brezesinski
The preparation of highly ordered mesoporous thin films of rhodium sesquioxide (Rh2O3) on silicon and quartz glass substrates by dip-coating via solution-based block copolymer self-assembly is reported. Hydrated rhodium chloride is shown to be an effective precursor for sol–gel processing of Rh2O3. Heating in air to 600 °C crystallizes single-phase Rh2O3(I) while fully preserving the cubic symmetry 3D pore-solid architecture, whereas at 750 °C only the in-plane pore order is retained. Interestingly, there is no crystalline–crystalline transformation upon heating to 1000 °C, despite distinct microstructure coarsening. The thermal stability of the sol–gel-derived material in terms of mesostructure retention can be significantly enhanced by atomic layer deposition surface treatment, making the block copolymer-templated thin films interesting for demanding applications. Furthermore, the results of preliminary humidity sensing and photochemical activity measurements indicate that the nanocrystalline Rh2O3(I) shows promising properties as a sensor material and a visible-light photocatalyst.
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DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
J. Ghose;A. Roy
通讯作者:
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影响因子:
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作者:
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影响因子:
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作者:
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