Hollow Au Nanosphere-Cu2O Core–Shell Nanostructures with Controllable Core Surface Morphology
[1];
[4];
[3];
[5]
- National Chiao Tung Univ., Hsinchu (Taiwan); Univ. of California, Santa Cruz, CA (United States)
- Univ. of California, Santa Cruz, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- National Chiao Tung Univ., Hsinchu (Taiwan)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Santa Cruz, CA (United States)
Design of metal-semiconductor interfaces and heterostructures is of strong interest for various catalytic applications including photocatalysis. Here, a series of hollow Au nanosphere (HGN)-Cu2O core-shell nanostructures with varying core surface rugosities are synthesized and investigated for possible photocatalytic applications. HGN surface rugosity is tuned by pH modification during galvanic exchange, and carboxyl groups are utilized as coordination sites to deposit uniform Cu2O shells onto the gold surfaces. Final core-shell structures are verified by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), and X-ray diffraction (XRD). Information regarding chemical state and electronic band structure is acquired by X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). Ultrafast transient absorption (TA) reveals that charge separation in bumpy HGN (bHGN)-Cu2O may effectively provide longer-lived photoexcited carriers, offering great potential for utilization in advanced photocatalytic processes.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES), Chemical Sciences, Geosciences & Biosciences Division; Ministry of Science and Technology (MOST) of Taiwan
- Grant/Contract Number:
- AC02-05CH11231; SC0004993; MOST 107-2113-M-009-004; MOST 108-2628-M-009-004-MY3; MOST 108-2218-E-009-039-MY3
- OSTI ID:
- 1642688
- Journal Information:
- Journal of Physical Chemistry. C, Vol. 124, Issue 21; ISSN 1932-7447
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Integrated Solar-Driven Device with a Front Surface Semitransparent Catalysts for Unassisted CO2 Reduction
New bipolar host materials for high power efficiency green thermally activated delayed fluorescence $\mathrm{OLEDs}$