One-pot synthesis of ZnO decorated with AgBr nanoparticles and its enhanced photocatalytic properties

Abstract

Shuttle-like AgBr-ZnO nanocomposites were successfully synthesized via a facile chemical precipitation method using CTAB as both an cationic surfactant and Br − source. The structure, composition and morphology of the as-synthesized products were characterized by means of powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL) and the Brunauer-Emmett-Teller (BET) surface area measurements. The results revealed that the as-synthesized samples were single crystalline nanostructures with a shuttle-like morphology. The reaction temperature played an important role in the composition and morphology of the products. When the temperature was increased from 40 °C to 80 °C, the components of corresponding products changed from binary Ag-ZnO to ternary Ag-AgBr-ZnO, then to binary AgBr-ZnO, and the morphology underwent a change from aggregated nanoparticles to regular shuttle-like shaped crystals with diameters of ca. 200 nm and lengths of ca. 600 nm. Significantly, the as-prepared AgBr-ZnO nanocomposites showed enhanced photocatalytic properties for the degradation of Rhodamine B in aqueous solution under UV irradiation with a filter (λ = 365 nm) in comparison to the pure ZnO nanomaterials.

ZnFe2O4 nanoparticles: Synthesis, characterization, and enhanced gas sensing property for acetone

“…The large specific surface area of ZnFe 2 O 4 nanoparticles may come from small size of sample, as observed from the TEM images [14]. Compared with precursor ZnO (11.54 m 2 g −1 ) [20], the higher specific surface area of ZnFe 2 O 4 could provide more efficient active sites, which would enhance the gas sensing performances of ZnFe 2 O 4 -based sensors.…”

“…(1) Synthesis of ZnO Shuttle-like ZnO nanoparticles were synthesized based on our previous work [20]. Briefly, 80 mL distilled water was added into a three-necked flask with capacity of 100 mL, and heated to 80 • C, then 0.8 mmol (0.109 g) ZnCl 2 and 4 mmol (0.151 g) NaBH 4 were added into the flask with vigorous magnetic stirring.…”

Synthesis of Textured Tungsten Disulfide Nanosheets and their Catalysis for Benzylamine Coupling Reaction

“…Transition metal chalcogenides include a big family with the characteristics of layered structure and tunable band gaps, which exhibit good electric and optical properties . As a member of the big family, tungsten disulfide (WS 2 ) nanosheet has recently attracted widespread attention from scientists by virtue of its good photoluminescence effect and considerable absorption intensity in the visible range as well as excellent mechanical properties and flexibility .…”

One-pot synthesis of an AgBr/ZnO hierarchical structure with enhanced photocatalytic capacity

“…Recently, various morphologies of AgBr/ZnO materials have been prepared, such as rod-like morphology, 18 hexagonal structures 21 and a shuttle-like shape. 22 The advantages of three-dimensional hierarchically assembled nanoplatelets or nanoparticles (NPs) include not only the high surface area for effective loading, but also the structural stability and dispersity compared to one-dimensional nanowires and zero-dimensional NP structures. 23 In considering the previously mentioned aspects, hydrangea like AgBr/ZnO composites with hierarchical structure have been synthesized using a one-pot wet chemical method for the rst time.…”