In-situ construction of TiO2 polymorphic junction nanoarrays without cocatalyst for boosting photocatalytic hydrogen generation.
In-situ construction of TiO2 polymorphic junction nanoarrays without cocatalyst for boosting photocatalytic hydrogen generation.
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DOI：
10.1016/j.jcis.2023.09.198
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发表时间：
2023-10
影响因子：
9.9
通讯作者：
Qianqian Shen;Baobao Jin;Jinlong Li;Zhen Sun;Wenxiang Kang;Huimin Li;H. Jia;Qi Li;J. Xue
中科院分区：
文献类型：
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作者：
Qianqian Shen;Baobao Jin;Jinlong Li;Zhen Sun;Wenxiang Kang;Huimin Li;H. Jia;Qi Li;J. Xue
There are significant challenges in developing technologies for high-yield photocatalytic hydrogen production reactions. Current photocatalytic materials face three key problems: low utilization of light, rapid recombination of photogenerated electron-hole pairs, and a limited number of active sites during photocatalytic reactions. As a result, these materials only improve one or two of the three steps involved in photocatalytic hydrogen production reactions. Consequently, achieving simultaneous multifunctional synergy to enhance the efficiency of all three processes is difficult. Here, we report an in situ dissolution-recrystallisation approach to design and fabricate a three-dimensional TiO2rutile/anatase (AE-TiO2) array photocatalytic material for photocatalytic hydrolysis applications. It is shown that the unique 3D nanoarray structure and in situ fabrication of the AE-TiO2homojunction with synergistic effects among the components lead to an increase in light harvesting efficiency, charge transport separation efficiency and surface active sites, which remarkably improve the photocatalytic hydrolysis performance. The prepared AE-TiO2homojunction materials realizes a maximal photoactivity of 4 μmol cm−2·h−1, which is 39 times larger than that of pure TiO2rutile nanorods.
