Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin Province 130022, China.
Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin Province 130022, China.
J Colloid Interface Sci. 2017 Nov 1;505:884-891. doi: 10.1016/j.jcis.2017.06.072. Epub 2017 Jun 22.
Natural biological systems often use hollow structures to decrease reflection and achieve high solar light utilization. Herein, bio-inspired Au@TiO yolk-shell nanoparticles (NPs) have been designed to combine the advantages of noble metal coupling and hollow structures, and subsequently synthesized via a facile one-pot hydrothermal approach. The Au@TiO yolk-shell NPs not only exhibit reduced reflectance by multiple reflections and scattering within the hollow NPs, but also show enhanced photocatalytic activity in Rhodamine B (RhB) degradation by simultaneously improving light harvesting, charge separation and reaction site accessibility. Specifically, compared to the commercial TiO (P25), Au/TiO hybrid and Au@TiO core-shell NPs, the Au@TiO yolk-shell NPs demonstrate lower reflectance over a broader range and superior photocatalytic activity with more than 98.1% of RhB decomposed within 4h under visible light. The bio-inspired nanostructure, as well as the facile and scalable fabrication approach, will open a new avenue to the rational design and preparation of efficient photocatalysts for pollutant removal.
自然生物系统通常使用中空结构来减少反射，实现对太阳光的高效利用。在此，受生物启发的 Au@TiO 蛋黄壳纳米粒子（NPs）被设计为结合贵金属偶联和中空结构的优点，然后通过简便的一锅水热法合成。Au@TiO 蛋黄壳 NPs 不仅通过中空 NPs 内的多次反射和散射降低了反射率，而且通过提高光捕获、电荷分离和反应位可及性，在 Rhodamine B（RhB）降解中表现出增强的光催化活性。具体而言，与商业 TiO（P25）、Au/TiO 杂化和 Au@TiO 核壳 NPs 相比，Au@TiO 蛋黄壳 NPs 在更宽的范围内表现出更低的反射率，并且在可见光下 4h 内超过 98.1%的 RhB 分解，显示出更高的光催化活性。这种受生物启发的纳米结构以及简便且可扩展的制造方法，将为高效光催化剂的合理设计和制备开辟一条新途径，用于污染物去除。
