TY - JOUR
T1 - Multifunctional nanostructures of Au-Bi2O3fractals for CO2reduction and optical sensing
AU - Tran-Phu, Thanh
AU - Daiyan, Rahman
AU - Fusco, Zelio
AU - Ma, Zhipeng
AU - Rahim, Lina Raihana Abd
AU - Kiy, Alexander
AU - Kluth, Patrick
AU - Guo, Xuyun
AU - Zhu, Ye
AU - Chen, Hongjun
AU - Amal, Rose
AU - Tricoli, Antonio
PY - 2020/6/14
Y1 - 2020/6/14
N2 - The development of nanomaterials with multifunctional properties presents a viable business case for potential scale-up of nanomaterial fabrication. Hence, the design and engineering of structures as well as tuning of active sites are crucial in generating multifunctional properties in nanomaterials. In this regard, we demonstrate a three-dimensional (3D) fractal structure of Au-Bi2O3with a fractal dimension (Df) of ≈ 1.80, which is obtained from the small-angle X-ray scattering (SAXS) measurement and through the box counting algorithm. The fractal structures, fabricatedviaa one-step direct synthesis, gives a homogeneous distribution of catalytically active nanocrystals Au and Bi2O3on a 3D platform with a large active surface area, resulting in a strong enhancement of its localized electric field. Therefore, when applied as a catalyst for electrochemical CO2reduction reactions (CO2RR) and optical gas sensing, the material displays an excellent performance. Specifically, the fractal structure exhibits a high selectivity towards the formation of formate, achieving a very high faradaic efficiency of 97% and high mass-specific formate current density of −54 mA mg−1at −1.1 Vvs.a reversible hydrogen electrode (RHE). Similarly, this structure displayed a plasmonic shift as high as ∼5 nm for 4 vol% acetone sensing with a detection limit of 100 ppm towards different volatile organic compounds (VOCs).
AB - The development of nanomaterials with multifunctional properties presents a viable business case for potential scale-up of nanomaterial fabrication. Hence, the design and engineering of structures as well as tuning of active sites are crucial in generating multifunctional properties in nanomaterials. In this regard, we demonstrate a three-dimensional (3D) fractal structure of Au-Bi2O3with a fractal dimension (Df) of ≈ 1.80, which is obtained from the small-angle X-ray scattering (SAXS) measurement and through the box counting algorithm. The fractal structures, fabricatedviaa one-step direct synthesis, gives a homogeneous distribution of catalytically active nanocrystals Au and Bi2O3on a 3D platform with a large active surface area, resulting in a strong enhancement of its localized electric field. Therefore, when applied as a catalyst for electrochemical CO2reduction reactions (CO2RR) and optical gas sensing, the material displays an excellent performance. Specifically, the fractal structure exhibits a high selectivity towards the formation of formate, achieving a very high faradaic efficiency of 97% and high mass-specific formate current density of −54 mA mg−1at −1.1 Vvs.a reversible hydrogen electrode (RHE). Similarly, this structure displayed a plasmonic shift as high as ∼5 nm for 4 vol% acetone sensing with a detection limit of 100 ppm towards different volatile organic compounds (VOCs).
UR - http://www.scopus.com/inward/record.url?scp=85086180324&partnerID=8YFLogxK
U2 - 10.1039/d0ta01723j
DO - 10.1039/d0ta01723j
M3 - Journal article
AN - SCOPUS:85086180324
SN - 2050-7488
VL - 8
SP - 11233
EP - 11245
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 22
ER -