SnO2nanoparticles endowed Pt-TiO2 bowl nanoarraysenhanced redox ability towards efficient tetracycline hydrochlorideremoval andH2 generation

IF 8.6 2区工程技术 Q1 ENERGY & FUELS Sustainable Materials and Technologies Pub Date : 2025-03-14 DOI:10.1016/j.susmat.2025.e01358

Dong Wang , Hongyu Zhang , Ping Yang , Xiao Zhang

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Abstract

A novel approach is developed to construct Z-scheme heterojunctions via growing SnO₂ nanoparticles on Pt decorated hollow TiO₂ bowl nanoarrays (TBN) towards efficient photogenerated charge carrier separation and transfer to enhance the redox ability of resulting catalysts. Namely, sample TBN was fabricated using hollow carbon spheres as templates, in which highly crystalline TiO₂ nanoparticles (less than 10 nm) were assembled into nanoarray to construct hollow bowl spheres. Homogeneously distributed small Pt nanoparticles in TBN govern the growth of SnO₂ nanoparticles via a solvent thermal route and finally to create Z-scheme TiO₂/Pt/SnO₂ heterojunctions. Pt loading between SnO₂ and TBN components improved photogenerated charge carrier separation and transfer efficiencies and enhanced photocatalytic performance. TiO₂/Pt/SnO₂ heterostructure samples exhibited improved performance for tetracycline hydrochloride removal with a pseudo-first-order kinetic reaction constant of k = 0.080 min⁻¹which were 3.8 and 6.7 times of those of TBN (k = 0.012 min⁻¹) and TBN/SnO₂ composites (sample TS, k = 0.021 min⁻¹), respectively. Moreover, the photocatalytic hydrogen generation rate of TiO₂/Pt/SnO₂ heterostructures without using co-catalyst was 3511.9 μmol·g⁻¹·h⁻¹ which was 2.3 times of that of sample TS using Pt as co-catalyst. These results provided new sights for synthesis of photocatalysts especially for the removal of antibiotic pollutants.

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摘要通过在铂装饰的空心TiO2碗状纳米阵列（TBN）上生长SnO2纳米颗粒，开发了一种构建Z型异质结的新方法，以实现高效的光生电荷载流子分离和转移，从而提高催化剂的氧化还原能力。即以空心碳球为模板制作 TBN 样品，将高结晶 TiO2 纳米粒子（小于 10 纳米）组装成纳米阵列，构建空心碗状球体。TBN中均匀分布的小铂纳米粒子通过溶剂热途径促进了SnO2纳米粒子的生长，并最终形成了Z型TiO2/Pt/SnO2异质结。SnO2 和 TBN 成分之间的铂负载提高了光生电荷载流子的分离和转移效率，并增强了光催化性能。TiO2/Pt/SnO2 异质结构样品在去除盐酸四环素方面表现出更好的性能，其伪一阶反应动力学常数为 k = 0.080 min-1，分别是 TBN（k = 0.012 min-1）和 TBN/SnO2 复合材料（样品 TS，k = 0.021 min-1）的 3.8 倍和 6.7 倍。此外，在不使用助催化剂的情况下，TiO2/Pt/SnO2 异质结构的光催化制氢率为 3511.9 μmol-g-1-h-1，是使用铂作为助催化剂的样品 TS 的 2.3 倍。这些结果为合成光催化剂，尤其是去除抗生素污染物提供了新的视角。

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来源期刊

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.