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Preparation and photocatalytic CO 2 reduction performance of silver nanoparticles coated with coal‐based carbon dots
Author(s) -
Sun Fengchang,
Maimaiti Halidan,
Liu Yuee,
Awati Abuduheiremu
Publication year - 2018
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4191
Subject(s) - photocatalysis , materials science , adsorption , nanoparticle , composite number , chemical engineering , catalysis , carbon fibers , visible spectrum , luminescence , nanotechnology , absorption (acoustics) , photochemistry , composite material , optoelectronics , chemistry , organic chemistry , engineering
Summary Currently, the best approach to solve the increasing CO 2 emission and energy shortage problems comes from catalytic CO 2 reduction into organic fuels using solar radiation. Using inexpensive coal samples, here we synthesized coal‐based luminescent carbon dots (CDs) by H 2 O 2 oxidation method. Coated composite nanoparticle Ag/CDs were then fabricated using a simple silver mirror reaction to attach CDs in situ to Ag surface. The lattice structure of Ag/CDs was characterized, and the performance of photocatalytic CO 2 reduction into hydrocarbons was investigated. The surface of the composite contains a large number of oxygen groups and mesoporous interface from accumulation of uniform‐sized particles, demonstrating good adsorption capability for CO 2 . Thanks to the broad absorption spectra extending into the visible range and low recombination rate of photogenerated electron‐hole pairs, the composite nanoparticles can be applied in the photocatalytic CO 2 reduction. Compared with individual Ag and CDs, Ag/CDs exhibit enhanced photocatalytic activity for CO 2 reduction.