Qiang Wang, Xiaoqiang Zhan, Chenming Fan, Xiaofan Yang, Bing Li, Hong Liu, Yangjiang Wu, Kaihuan Zhang and Pengyi Tang
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引用次数: 0
Abstract
The rational design of Ti–O-based nanocomposites is of great importance for achieving efficient solar energy conversion and storage. Herein, novel one-dimensional (1D) K2Ti6O13/TiO2 core–shell nanobelt composites were fabricated by a controlled hydrothermal method using 1D K2Ti6O13 nanobelts as precursors. The K2Ti6O13 derived TiO2 shells with a thickness of 5 nm were in situ grown on the K2Ti6O13 NBs with closely connected interfaces, which resulted in remarkably enhanced photoactivities for pollutant degradation, hydrogen production and CO2 reduction. Interestingly, the porous carbon paper supported K2Ti6O13/TiO2 nanocomposites could be used for efficient water purification via synergistic adsorption and photothermal catalysis. Moreover, such a 1D conformal core–shell nanobelt photoanode also showed higher photoelectrochemical water-splitting performance than pure K2Ti6O13, and impressively the significantly accelerated and stable H2 production was achieved due to the thermodynamically favorable glycerol oxidation reaction. Importantly, the high value-added formate was produced along with cathodic H2 generation, revealing a sustainable way for concurrent solar hydrogen generation and green biomass upgrading. It was demonstrated that the enhanced photoactivities of K2Ti6O13/TiO2 nanocomposites could be mainly attributed to their higher light absorption, increased surface reactive sites and especially the promoted charge separation over the S-scheme heterojunction. This work paves a new avenue to rationally design versatile and high-performance Ti–O-based nanostructure photocatalysts for environmental remediation and solar fuel production.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.