Direct Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts

Hezam, Abdo1; Namratha, K.1; Ponnamma, Deepalekshmi2; Drmosh, Q. A.3,4; Saeed, Adel Morshed Nagi5; Cheng, Chun6; Byrappa, K.1

2018-09

10.1021/acsomega.8b01449

ACS Omega   影响因子和分区

2470-1343

Limited light absorption, inefficient electron-hole separation, and unsuitable positions of conduction band bottom and/or valence band top are three major critical issues associated with high-efficiency photocatalytic water treatment. An attempt has been carried out here to address these issues through the synthesis of direct Z-scheme Cs2O-Bi2O3-ZnO heterostructures via a facile, fast, and economic method: solution combustions synthesis. The photocatalytic performances are examined by the 4-chlorophenol degradation test under simulated sunlight irradiation. UV-vis diffuse reflectance spectroscopy analysis, electrochemical impedance test, and the observed transient photocurrent responses prove not only the significant role of Cs2O in extending light absorption to visible and near-infrared regions but also its involvement in charge carrier separation. Radical-trapping experiments verify the direct Z-scheme approach followed by the charge carriers in heterostructured Cs2O-Bi2O3-ZnO photocatalysts. The Z-scheme charge carrier pathway induced by the presence of Cs2O has emerged as the reason behind the efficient charge carrier separation and high photocatalytic activity.

SCI

英语

通讯

Training Program for Outstanding Young Teachers at Higher Education Institutions of Guangdong Province[YQ2015151]

Chemistry

Chemistry, Multidisciplinary

WOS:000446186000197

AMER CHEMICAL SOC

Web of Science

1.Univ Mysore, Ctr Mat Sci & Technol, Manasagangothiri 570006, Mysuru, India
2.Qatar Univ, Ctr Adv Mat, POB 2713, Doha, Qatar
3.King Fahd Univ Petr & Minerals, Phys Dept, Dhahran 31261, Saudi Arabia
4.King Fahd Univ Petr & Minerals, Ctr Res Excellence Nanotechnol, Dhahran 31261, Saudi Arabia
5.JSS Sci & Technol Univ, Sri Jayachamarajendra Coll Engn, Dept Polymer Sci & Technol, Mysure 570006, India
6.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Hezam, Abdo,Namratha, K.,Ponnamma, Deepalekshmi,et al. Direct Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts[J]. ACS Omega,2018,3(9):12260-12269.

Hezam, Abdo.,Namratha, K..,Ponnamma, Deepalekshmi.,Drmosh, Q. A..,Saeed, Adel Morshed Nagi.,...&Byrappa, K..(2018).Direct Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts.ACS Omega,3(9),12260-12269.

Hezam, Abdo,et al."Direct Z-Scheme Cs2O-Bi2O3-ZnO Heterostructures as Efficient Sunlight-Driven Photocatalysts".ACS Omega 3.9(2018):12260-12269.