Chemical etching preparation of BiOI/BiOBr heterostructures with enhanced photocatalytic properties for organic dye removal

Heterojunction BiOI/Bi2MoO6 nanocomposite with much enhanced photocatalytic activity

“…Apparently, the nested band edges of BiOI (E VB = 2.32 eV, E CB = 0.57 eV) and Bi 2 MoO 6 (E VB = 2.86 eV, E CB = 0.40 eV) are unfavorable for the separation of the photogenerated electrons and holes. However, the VB edge of BiOI could be rose up to a higher potential edge (-0.63 eV) under visible light (Cao et al 2012a). Herein, the reformed band structure diagram of BiOI/Bi 2 MoO 6 was presented in Fig.…”

“…In order to further meet the growing needs of solar energy conversion and environmental pollutants treatment, several efforts have been made in exploring new visible light photocatalysts in the last decades (Tian et al 2011;Cruz and Alfaro 2010). Among numerous photocatalysts, bismuth-based materials have attracted much attention due to their excellent intrinsic chemical and physical properties, and good photocatalytic efficiency, such as Bi 2 MoO 6 (Guo et al 2013), BiPO 4 (Xu et al 2013a), Bi 2 WO 6 (Zhang and Zhu 2012), BiOX(X=Cl, Br, I) Cao et al 2012a), (BiO) 2 CO 3 . As a typical Aurivillius oxide composed of Bi-O-Bi layers and MO 6 octahedron, Bi 2 MoO 6 has shown excellent photocatalytic activity, but its application is restricted due to its large band gap and high recombination of photogenerated electrons and holes .…”

Hydrothermal synthesis of Ag-doped BiOI nanostructure used for photocatalysis

“…Among photocatalytic materials, BiOI (bismuth oxyiodide) is a p-type semiconductor [18], its energy band gap has been estimated to be 1.77-1.92 eV [2,4,16,18]. BiOI is considered to be one of the most promising photocatalysts due to its good photocatalytic property originating from its unique layered structure [2,19].…”

“…In recent years, the research on solar energy conversion, environmental purification of hazardous pollutants, and designation and preparation of new photocatalysts has been very interesting [1][2][3]. Researchers have been studying semiconductor-based photocatalysis because the process is very interesting as green technology to alleviate the problems occurring from degrading pollutants and water splitting for green energy hydrogen production [4].…”

Facile Synthesis, Characterization, and Visible-light Photocatalytic Activities of 3D Hierarchical Bi2S3 Architectures Assembled by Nanoplatelets

“…With a direct narrow band gap of around 1.3 eV, bismuth sulfide (Bi 2 S 3 ), emerging as one promising member of group V-VI binary semi-conductors, has been attracting considerable attention due to its wide range of application in the field of solar cells [8,9], photo-detectors [10][11][12][13][14], gas sensors [14], thermoelectric devices [15], X-ray computed tomography imaging [16], lithium-ion batteries [17][18][19][20], and photocatalysis [21][22][23]. Bi 2 S 3 micro/nanostructures with various morphologies, including one-dimensional (1D) nanorods/nanowires, two-dimensional (2D) nanosheets/flakes, and three-dimensional (3D) hierarchical complex architectures, have been successfully fabricated in previous studies [10][11][12][13][14][15][17][18][19][23][24][25][26], since the properties of functional nanostructured materials are strongly dependent on the tailored morphology, microstructure and surface properties.…”