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Few-layered Bi4O5I2 nanosheets enclosed by {10-1} facets with oxygen vacancies for highly-efficient removal of water contaminants
Zhang, Lili; Zhai, Tingting; Yang, Min; Hu, Chun
2022-09-05
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume437Issue:0Pages:129274
AbstractFew-layered Bi4O5I2 nanosheets (FL-Bi4O5I2) were synthesized by intergrowth with Bi2O2CO3 under room temperature. The photoactivity of FL-Bi4O5I2 was 2.5 and 9.5 times higher than that of Bi4O5I2 nanoflakes (NF-Bi4O5I2, about 30 nm thickness) and standard visible-light-driven N-TiO2, respectively. Moreover, FL-Bi4O5I2 exhibited a wide pH application range (3.0 - 10.0) and excellent photostability. The characterization results showed FL-Bi4O5I2 was consisted of 5 - 8 layers with thickness of 4 - 7 nm and enclosed by {1 0 -1} facets. The ultrathin characteristics could accelerate the charge transfer to the surface due to the shortened transport distance. Compared to NF-Bi4O5I2, surface oxygen vacancies and the more negative CB potential were formed on FL-Bi4O5I2. The photogenerated electrons were confirmed to be captured by surface oxygen vacancies to effectively reduce surface adsorbed O-2 into HO2 center dot/O-2(center dot-), leaving more h(+) to oxidize organic pollutants. This process was further facilitated by the more negative CB potential of FL-Bi4O5I2, resulting in the highly efficient removal of pollutants.
Department中国科学院饮用水科学与技术重点实验室 ; 中国科学院饮用水科学与技术重点实验室
KeywordENHANCED PHOTOCATALYTIC ACTIVITY RICH BISMUTH OXYHALIDES REDUCED GRAPHENE OXIDE IN-SITU PREPARATION DEGRADATION PERFORMANCE STEP CIPROFLOXACIN CONSTRUCTION
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47852
Collection中国科学院饮用水科学与技术重点实验室
Corresponding AuthorHu, Chun
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
2.Guangzhou Univ, Inst Environm Res Greater Bay, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Guangzhou 510006, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Lili,Zhai, Tingting,Yang, Min,et al. Few-layered Bi4O5I2 nanosheets enclosed by {10-1} facets with oxygen vacancies for highly-efficient removal of water contaminants[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,437(0):129274.
APA Zhang, Lili,Zhai, Tingting,Yang, Min,&Hu, Chun.(2022).Few-layered Bi4O5I2 nanosheets enclosed by {10-1} facets with oxygen vacancies for highly-efficient removal of water contaminants.JOURNAL OF HAZARDOUS MATERIALS,437(0),129274.
MLA Zhang, Lili,et al."Few-layered Bi4O5I2 nanosheets enclosed by {10-1} facets with oxygen vacancies for highly-efficient removal of water contaminants".JOURNAL OF HAZARDOUS MATERIALS 437.0(2022):129274.
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