High-quality ZnO inverse opals and related heterostructures as photocatalysts produced by atomic layer deposition
High-quality ZnO inverse opals and related heterostructures as photocatalysts produced by atomic layer deposition
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通过原子层沉积生产高品质 ZnO 反蛋白石和相关异质结构作为光催化剂
DOI：
10.1016/j.apsusc.2018.05.160
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发表时间：
2018-10
影响因子：
6.7
通讯作者：
Wang Yongsheng
中科院分区：
文献类型：
--
作者：
Long Jie;Fu Ming;Li Caixia;Sun Cuifeng;He Dawei;Wang Yongsheng
ZnO具有丰富的半导体性质，电子迁移率高，形貌多变，具有良好的光电化学（PEC）催化性能。由于引入具有较大表面比的纳米光子结构可以进一步提高太阳能转换效率，因此采用O3为氧化剂的ALD法制备了高质量的ZnO反蛋白石。与H2O原子层沉积法和电沉积法相比，O3原子层沉积法制备的ZnO IOs的本征紫外发射峰和光电转换电流都有很大的提高。在更高温度（240 °C）下的ALD可以进一步提高结晶质量和PEC性能。讨论了通过控制ALD周期获得的最佳ALD厚度和填充率，以及不同球径胶体晶体获得的最佳光子阻带位置。结果表明，以四氯化钛为前驱体，采用ALD法在ZnO IOs表面涂覆TiO2保护层，可以提高ZnO IOs的光化学稳定性。通过在TiO2保护层内插入ALD Al2O3，进一步降低了光腐蚀。为了提高光子晶体的光电转换性能，我们还开发了具有不同孔隙周期的双层IO结构的异质结构光子晶体。
ZnO with various nanostructures is widely investigated for high photoelectrochemical (PEC) catalysis performances due to its abundant and inert semiconducting properties with elevated electronic mobility and variable morphologies. Because the solar energy conversion efficiencies could possibly be further enhanced by the introduction of nanophotonic structures with larger surface ratios, high-quality ZnO inverse opals (IOs) were achieved by ALD method using O3as the oxidant. The intrinsic UV emission peaks and PEC currents of ZnO IOs produced by O3atomic layer deposition (ALD) method were much improved when compared to those made by H2O ALD and electrodeposition. ALD at higher temperatures (240 °C) can further enhance the crystalline quality and PEC performances. The optimal ALD thickness and filling fraction obtained by controlling ALD cycles, as well as the optimal photonic stop band position obtained by colloidal crystals with different sphere diameters were also discussed. It was found that conformally coated samples with TiO2protection layers by ALD method using titanium tetrachloride as a precursor enhanced the photochemical stability of ZnO IOs. The photocorrosion was further reduced by inserting ALD Al2O3inside the TiO2protection layers. Heterostructured photonic crystals with double-layer IO structures with different pore periodicities were also developed for enhancing the PEC performances.
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影响因子：
5.2
作者：
Barick, K. C.;Singh, Sarika;Bahadur, D.
通讯作者：
Bahadur, D.
影响因子：
3.7
作者：
Liu, Mingzhao;Nam, Chang-Yong;Zhang, Lihua
通讯作者：
Zhang, Lihua
影响因子：
15
作者：
M. Shim;P. Guyot-Sionnest
通讯作者：
M. Shim;P. Guyot-Sionnest
影响因子：
10.8
作者：
Park, JH;Kim, S;Bard, AJ
通讯作者：
Bard, AJ
影响因子：
4
作者：
Moonju Cho;D. Jeong;Jaehoon Park;Hong-bae Park;S. Lee;T. Park;C. Hwang;G. Jang;Jaehack Jeong
通讯作者：
Moonju Cho;D. Jeong;Jaehoon Park;Hong-bae Park;S. Lee;T. Park;C. Hwang;G. Jang;Jaehack Jeong