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- W3019171034 abstract "The design of photocatalysts with enhanced efficiency is pivotal to sustainable environmental remediation and renewable energy technologies. Simultaneous optimization of different factors affecting the performance of a photocatalyst, including the density of active surface sites, charge carrier separation, and valence and conduction band redox potentials, remains challenging. Here, we report the synthesis of ternary gallium tin oxide (GTO) nanocrystals (NCs) with variable composition and investigate the role of Ga³⁺ dopants in altering the electronic structure of rutile-type SnO₂ NC lattice using steady-state and time-resolved photoluminescence spectroscopies. Substitutional incorporation of Ga³⁺ increases the band gap of SnO₂ NCs, imparting the reducing power to the conduction band electrons, and causes the formation of acceptor states, which, in conjunction with electron trapping by donors (oxygen vacancies), leads to stabilization of the photoexcited carriers. Combination of a decrease in the charge recombination rate and adjustment of the conduction band reduction potential to more negative values synergistically promote the photocatalytic efficiency of the GTO NCs. The apparent rate constant for the photocatalytic degradation of rhodamine-590 dye by optimally prepared GTO NCs is 0.39 min–¹, more than 2 times greater than that by benchmark AEROXIDE TiO₂ P25 photocatalyst. The results of this work highlight the concept of using rational aliovalent doping of judiciously chosen metal oxide NC lattices to simultaneously manipulate multiple photocatalytic parameters, enabling the design of versatile and highly efficient photocatalysts." @default.
- W3019171034 created "2020-05-01" @default.
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- W3019171034 date "2018-01-01" @default.
- W3019171034 modified "2023-09-25" @default.
- W3019171034 title "Synergistic Effect of the Electronic Structure and Defect Formation Enhances Photocatalytic Efficiency of Gallium Tin Oxide Nanocrystals" @default.
- W3019171034 hasPublicationYear "2018" @default.
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