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One‐pot combustion synthesis and efficient broad spectrum photoactivity of Bi/Bi OB r:Yb,Er/C photocatalyst
Author(s) -
Liang Shuhui,
Zhang Tongtong,
Zhang Dafeng,
Pu Xipeng,
Shao Xin,
Li Wenzhi,
Dou Jianmin
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15520
Subject(s) - photocatalysis , visible spectrum , ternary operation , rhodamine b , materials science , photodegradation , photochemistry , nuclear chemistry , chemistry , catalysis , organic chemistry , optoelectronics , computer science , programming language
A highly efficient broad spectrum responsive Bi/Bi OB r:Yb,Er/C ternary composite was synthesized by a simple one‐pot combustion method using nitrates and citric acid as raw materials. Experimental results show that Er 3+ /Yb 3+ were successfully doped into Bi OB r lattice, and metallic Bi nanoparticles and carbon species were formed simultaneously. Compared with pure Bi OB r and Bi/Bi OB r/C, as‐synthesized Bi/Bi OB r:Yb,Er/C ternary photocatalyst is highly responsive in the UV ‐visible‐ NIR range, and possesses the best photodegradation performance for Rhodamine B, phenol, and imidacloprid under visible, NIR , or solar light irradiation, which can be attributed to the synergetic effects of surface plasma resonance of metallic Bi, up‐conversion transition of Er 3+ and heterojunctions (Bi/Bi OB r, Bi/C, and Bi OB r/C). Moreover, a plausible mechanism was given, the main active species, and photostability of samples were studied. The solar light photoactivity and influences of pH value and anions (Cl − , SO 4 2− , CO 3 2− , HCO 3 − , and NO 3 − ) were also investigated. This study highlights the advantages of synergetic effects of SPR , up‐conversion and heterojunctions, which provides a useful guide toward the rational design of broad spectrum ( UV ‐visible‐near infrared) photocatalysts.