Pt Colloidosomes with Broadband Absorption for Near‐Infrared Light Photocatalysis Through D‐Band Hot‐Carriers Generation
Abstract
Abstract Interband and intraband electronic excitations in transition metals as nanocatalysts are crucial for the generation of hot carriers. Unlike the well‐known Au, Ag and Cu nanoparticles (NPs), in which hot carriers are directly formed by absorption of visible light, Pt NPs still have limited hot carriers photogeneration ability. Nonetheless, Pt's unique d‐band structure permits a high density of electronic states near Fermi energy. It should have exhibited photoenhanced catalysis. Here, guided by finite‐different‐time‐domain (FDTD) calculations, we take advantage of Pt electronic structure by designing a sub‐100 nm colloidosome (Cs) consisted of ultrasmall (≤ 5 nm) Pt NPs with broadband absorption from visible to near‐infrared (NIR) band. The ultrasmall Pt NPs in the Cs efficiently generated hot electrons even under excitation with the low‐energy electromagnetic radiation. The key for realization of Cs is the exploitation of laser‐generated, grain boundaries (GBs) enriched Mn 3 O 4 NPs as scaffolds for the efficient and homogeneous loading of ultrasmall Pt NPs. These Pt Cs show outstanding performances as catalase (CAT) and oxidase (OXD) mimics under NIR band irradiation, allowing their use for photocatalysis of oxidation reactions. Besides, the in vivo exploitation of Pt Cs for tumor photodynamic therapy allowed unprecedented efficacy and caused tumor growth suppression.
Article Details
Authors (16)
Sihan Ji
School of Energy Materials and Chemical Engineering Hefei University No. 99, Jinxiu Avenue Hefei 230601 China
Xianglong Zhao
University of Science and Technology of China Hefei 230026 P.R. China
Pengfei Li
Peng Zheng
State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering
Haibin Tang
Vincenzo Amendola
Department of Chemical Sciences, University of Padova, via Marzolo 1, Padova I-35131, Italy
Dongshi Zhang
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 P.R. China
Yunyu Cai
Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 P.R. China
Kun Ma
Changhao Wang
Key Laboratory of Applied Surface and Colloid Chemistry (MOE), School of Chemistry and Chemical Engineering
Xiaohu Cheng
Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 P.R. China
Shuxian Wei
Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 P.R. China
Lingli Wu
State Key Laboratory of Functional Crystals and Devices Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian China
Yixing Ye
Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 P.R. China
Junfeng Wang
Changhao Liang
Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 P.R. China