Heterostructured Bi₂O₃/Bi₂MoO₆ nanocomposites: simple construction and enhanced visible-light photocatalytic performance

Abstract

nanocomposites with enhanced visible-light photocatalytic activity are successfully constructed by a simple two-step route, employing bismuth nitrate and sodium molybdate as the main raw materials in the presence of polyvinyl pyrrolidone (PVP). The phase and the morphology of the as-prepared composites are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), (high-resolution) transmission electron microscopy (TEM/HRTEM), and energy dispersive spectrometry (EDS). It is found that heterostructured Bi 2 O 3 /Bi 2 MoO 6 nanocomposites exhibit stronger catalytic activities for the degradation of Rhodamine B (RhB) and 2,4-dinitrophenol (2,4-DNP) under the irradiation of visible light than the single component (Bi 2 O 3 or Bi 2 MoO 6 ). The above enhanced photocatalytic performance should be attributed to the formation of the p-n junction between the ptype Bi 2 O 3 and n-type Bi 2 MoO 6 , which effectively halts the fast recombination of photogenerated electrons and holes. Moreover, the as-obtained Bi 2 O 3 /Bi 2 MoO 6 nano-heterostructures also display improved photoelectochemistry performance and high photochemical stability, which is important for conquering the photo-corrosion of photocatalysts. Also, the present work is a useful attempt for the design of new visible-light photocatalytic materials with heterojunction structures.

One‐Step Solvothermal Synthesis of BiPO4/Bi2MoO6 Heterostructure with Oxygen Vacancies and Z‐Scheme System for Enhanced Photocatalytic Performance

“…The peak at 132.6 eV (Figure d) can be indexed to P 5+ of the PO 4 3− . Figure e shows the three typical peaks at 530.3, 532.4 and 535.0 eV, which can be ascribed to the lattice O in BiPO 4 , the lattice O in Bi 2 MoO 6 and the surface‐adsorbed O species, respectively. The existence of oxygen vacancies in BMoP‐1‐3 catalyst was also proved by the EPR result (Figure S4).…”

Preparation and evaluation of a hierarchical Bi2MoO6/MSB composite for visible-light-driven photocatalytic performance

“…Rhodamine is then gradually decomposed due to the further destruction of the conjugated structure. [42][43][44][45] Fig . 8 shows the results of photocatalytic efficiency of degradation of RhB solution by Bi 2 MoO 6 /MSB with different mass ratio.…”

Facet, Junction and Electric Field Engineering of Bismuth‐Based Materials for Photocatalysis

“…[159] This prominent enhancement of photocatalytic performance and efficient separation of photoinduced electron-hole pairs are attributed to the construction of a Z-scheme structure and reliable interfacial interaction of BiVO 4 /g-C 3 N 4 . A series of techniques, [115] nÀBi 12 O 17 Cl 2 / pÀBiOI photocatalytic oxidation of 2,4-DCP, RhB, phenol, BPA, and tetracycline hydrochloride [119] nÀSr 2 TiO 4 / pÀBi 5 O 7 I photocatalytic oxidation of MO [120] pÀBiOI/ nÀBiPO 4 photocatalytic oxidation of MO and phenol [121] pÀBiOBr/ nÀLa 2 Ti 2 O 7 photocatalytic oxidation of RhB and phenol [122] pÀBiOI/ nÀBi 2 O 2 CO 3 photocatalytic oxidation of RhB [123] pÀBiOI/ nÀgÀC 3 N 4 photocatalytic oxidation of BPA [124] nÀBiPO 4 / pÀBiOBr Photocatalytic activity for formaldehyde Oxidation; photocatalytic oxidation of RhB [125126] pÀBiOCl/ nÀBiVO 4 photocatalytic oxidation of RhB [127] pÀBiOI/ nÀBiOIO 3 photocatalytic oxidation of MB [30] pÀCuBi 2 O 4 / nÀBiWO 6 photocatalytic oxidation of MB and photocatalytic reduction of Cr 2 O 7 2À [128] pÀBiOCl/ nÀBiVO 4 photocatalytic oxidation of MO [129] pÀBi 2 O 3 / nÀBi 2 WO 6-x F 2x photocatalytic oxidation of RhB [130] pÀBiOCl/ nÀBi 2 O 2 CO 3 photocatalytic oxidation of RhB [131] pÀBi 2 O 3 / nÀBi 2 WO 6 photocatalytic oxidation of RhB and phenol [114] pÀBiOI/ nÀMnNb 2 O 6 degradation of antibiotics (TC, oxytetracycline, ciprofloxacin and doxycycline) [132] pÀBiOBr/ nÀCeO 2 photocatalytic oxidation of RhB, MB and phenol [133] pÀBiOBr/ nÀBi(C 2 O 4 ) OH photocatalytic oxidation of RhB [134] pÀBi 2 O 3 / nÀBi 2 MoO 6 photocatalytic oxidation of RhB and 2,4-DNP [135] pÀBiOBr/ nÀZnO photocatalytic oxidation of phenol [136] pÀBiOBr/ nÀBiOIO 3 photocatalytic oxidation of RhB, MB, MO and crystal violet [137] pÀBiOBr/ nÀTiO 2 photocatalytic oxidation of RhB and photocatalytic H 2 generation [138] pÀBiOI/ nÀBrÀBi 2 O 2 CO 3 photocatalytic oxidation of MO [139] pÀBiOI/ nÀBi 2 Sn 2 O 7 photocatalytic oxidation of RhB [140] pÀBiOI/ nÀSnS 2 photocatalytic oxidation of RhB [141] nÀFe 2 O 3 / pÀBiOI photocatalytic oxidation of RhB…”