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Accurate design of hollow/tubular porous g-C3N4 from melamine-cyanuric acid supramolecular prepared with mechanochemical method
Niu, Hongyun; Zhao, Weijia; Lv, Hongzhou; Yang, Yongliang; Cai, Yaqi
2021-05-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume411Pages:-
AbstractThe melamine-cyanuric acid (MA-CA) supramolecular is regarded as an ideal starting material to prepare tubular or hollow g-C3N4. The morphologies of g-C3N4 diversify owing to different preparation condition of MA-CA supramolecular, which is far from satisfactory to be explained by the mechanism of self-templating of precursors during calcination. To disclose the hidden rules of shape variety of g-C3N4 derived from MA-CA, we fabricate MA-CA mixture/supramoleculars with ill-defined morphologies using the mechanochemical technique. After polymerization, the obtained g-C3N4 samples are in the shapes of hollow nanorods (HNR), nanotubes (NT), and porous nanosheets (NS) depending on the hydrogen bonding degree between CA and MA in the starting materials. The photocatalytic activity of these g-C3N4 samples in H2 evolution and organic pollutants degradation increases with the rising of surface areas with the exception of g-C3N4 NS. The relatively lower photocatalytic performance of g-C3N4 NS than hollow and tubular g-C3N4 samples can be attributed to its more positive CB position and worse photogenerated carrier separation ability. The cavity void of hollow and tubular g-C3N4 samples realizes the enrichment of reactive oxygen species and organic pollutants into a local microenvironment, which provides a driving force to facilitate the oxidation degradation of pollutants. This study provides a forceful basis for the systematic fine-tuning of the morphologies and physico-chemical properties of g-C3N4.
Department环境化学与生态毒理学国家重点实验室
KeywordMechanochemical technique Melamine-cyanuric acid g-C3N4 Photocatalytic water splitting Photodegradation
WOS Research AreaEngineering, Environmental ; Engineering, Chemical
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45646
Collection环境化学与生态毒理学国家重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Hohai Univ, Coll Environm, Nanjing 210098, Peoples R China
4.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
5.Jianghan Univ, Inst Environm & Hlth, Wuhan 430056, Peoples R China
Recommended Citation
GB/T 7714
Niu, Hongyun,Zhao, Weijia,Lv, Hongzhou,et al. Accurate design of hollow/tubular porous g-C3N4 from melamine-cyanuric acid supramolecular prepared with mechanochemical method[J]. CHEMICAL ENGINEERING JOURNAL,2021,411:-.
APA Niu, Hongyun,Zhao, Weijia,Lv, Hongzhou,Yang, Yongliang,&Cai, Yaqi.(2021).Accurate design of hollow/tubular porous g-C3N4 from melamine-cyanuric acid supramolecular prepared with mechanochemical method.CHEMICAL ENGINEERING JOURNAL,411,-.
MLA Niu, Hongyun,et al."Accurate design of hollow/tubular porous g-C3N4 from melamine-cyanuric acid supramolecular prepared with mechanochemical method".CHEMICAL ENGINEERING JOURNAL 411(2021):-.
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