Details

Autor(en) / Beteiligte

• li Zhao, Wen
• hua Gao, Yan
• Zhang, Dongfeng

Titel

Hydrothermal synthesis of spherical g-C3N4 and CdS composite photocatalyst with enhanced visible light photocatalytic activity

Ist Teil von

• Chemical physics letters, 2022-01, Vol.787, p.139268, Article 139268

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Spherical g-C3N4 with N defect and O doping was prepared by hydrothermal method.•The addition of cetyltrimethylammonium bromide brings a lot of positive charges on the surface of N-OCN.•Positively charged N-OCN and CdS attract each other, which strengthens the close relationship between CdS and N-OCN.•The N-OCN combines with CdS to form a direct Z-type heterojunction. In this paper, spherical g-C3N4 modified by N defect and O doping was prepared by a simple hydrothermal method, and combined with CdS to form a direct Z-type heterojunction. Combined with a series of characterizations (XRD, SEM, BET, FTIR and UV–vis DRS), the results show that the addition of CTAB brings a lot of positive charges on the surface of N-OCN. According to the principle of electrostatic attraction, positively charged N-OCN negatively charged CdS attract each other, which strengthens the close contact between CdS and N-OCN and plays an important role in stabilizing the formation of heterojunction. CdS is anchored to N-OCN through electrostatic interaction. Under the irradiation of visible light, the electrons on CB on positively charged N-OCN combine with holes on negatively charged CdS valence band, which improves the redox ability in photocatalytic reaction system. Taking methyl orange (MO) as a pollutant degradation model, the possible degradation mechanism was discussed in detail. This study provides a simple, effective and wide application method for the modification of g-C3N4.