Super-Assembled Multilayered Mesoporous TiO2 Nanorockets for Light-Powered Space-Confined Microfluidic Catalysis,ACS Applied Materials & Interfaces

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Super-Assembled Multilayered Mesoporous TiO2 Nanorockets for Light-Powered Space-Confined Microfluidic Catalysis
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-04-25 , DOI: 10.1021/acsami.3c19302
Jie Zeng _{1,

2} , Lei Xie ₃ , Tianyi Liu ₂ , Yanjun He ₂ , Weiyan Liu ₄ , Qing Zhang ₄ , Junyan Li ₄ , Xiaofeng Li ₅ , Beilei Qiu ₂ , Shan Zhou ₂ , Qirui Liang ₂ , Xudong Wang ₂ , Kang Liang ₆ , Jinyao Tang ₅ , Jian Liu ₇ , Lei Jiang ₈ , Gang Huang ₁ , Biao Kong _{2,

9,

10}

Affiliation

Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China.
Department of Chemistry, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, P. R. China.
The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China.
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China.
The University of Hong Kong, Hong Kong 999077, P. R. China.
School of Chemical Engineering, Graduate School of Biomedical Engineering, and Australian Centre for NanoMedicine, University of New South Wales, Sydney, New South Wales 2052, Australia.
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China.
CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Yiwu Research Institute of Fudan University, Yiwu, Zhejiang 322000, P. R. China.
Shandong Research Institute, Fudan University, Shandong 250103, China.

In the field of sustainable chemistry, it is still a significant challenge to realize efficient light-powered space-confined catalysis and propulsion due to the limited solar absorption efficiency and the low mass and heat transfer efficiency. Here, novel semiconductor TiO₂ nanorockets with asymmetric, hollow, mesoporous, and double-layer structures are successfully constructed through a facile interfacial superassembly strategy. The high concentration of defects and unique topological features improve light scattering and reduce the distance for charge migration and directed charge separation, resulting in enhanced light harvesting in the confined nanospace and resulting in enhanced catalysis and self-propulsion. The movement velocity of double-layered nanorockets can reach up to 10.5 μm s^–1 under visible light, which is approximately 57 and 119% higher than that of asymmetric single-layered TiO₂ and isotropic hollow TiO₂ nanospheres, respectively. In addition, the double-layered nanorockets improve the degradation rate of the common pollutant methylene blue under sustainable visible light with a 247% rise of first-order rate constant compared to isotropic hollow TiO₂ nanospheres. Furthermore, FEA simulations reveal and confirm the double-layered confined-space enhanced catalysis and self-propulsion mechanism.

中文翻译：

用于光动力空间受限微流控催化的超组装多层介孔二氧化钛纳米火箭

在可持续化学领域，由于有限的太阳能吸收效率和较低的传质传热效率，实现高效的光动力空间受限催化和推进仍然是一个重大挑战。在这里，通过简单的界面超组装策略成功构建了具有不对称、中空、介孔和双层结构的新型半导体TiO ₂纳米火箭。高浓度的缺陷和独特的拓扑特征改善了光散射，减少了电荷迁移和定向电荷分离的距离，从而增强了受限纳米空间中的光捕获，并增强了催化和自推进。双层纳米火箭在可见光下的运动速度可达10.5 μm s ^–1 ，分别比不对称单层TiO ₂和各向同性空心TiO ₂纳米球高约57%和119%。此外，双层纳米火箭提高了可持续可见光下常见污染物亚甲基蓝的降解率，与各向同性空心TiO ₂纳米球相比，一级速率常数提高了247%。此外，有限元模拟揭示并证实了双层受限空间增强催化和自推进机制。

更新日期：2024-04-25

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