Facile Preparation of Nano-Bi2MoO6/Diatomite Composite for Enhancing Photocatalytic Performance under Visible Light Irradiation

Abstract

In this work, a new nano-Bi2MoO6/diatomite composite photocatalyst was successfully synthesized by a facile solvothermal method. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and UV-vis diffuse reflection spectroscopy (DRS) were employed to investigate the morphology, crystal structure, and optical properties. It was shown that nanometer-scaled Bi2MoO6 crystals were well-deposited on the surface of Bi2MoO6/diatomite. The photocatalytic activity of the obtained samples was evaluated by the degradation of rhodamine B (RhB) under the visible light (λ > 420 nm) irradiation. Moreover, trapping experiments were performed to investigate the possible photocatalytic reaction mechanism. The results showed that the nano-Bi2MoO6/diatomite composite with the mass ratio of Bi2MoO6 to diatomaceous earth of 70% exhibited the highest activity, and the RhB degradation efficiency reached 97.6% within 60 min. The main active species were revealed to be h+ and•O2−. As a photocatalytic reactor, its recycling performance showed a good stability and reusability. This new composite photocatalyst material holds great promise in the engineering field for the environmental remediation.

Novel indirect Z-scheme g-C3N4/Bi2MoO6/Bi hollow microsphere heterojunctions with SPR-promoted visible absorption and highly enhanced photocatalytic performance

“…The XRD pattern of CN shows two intrinsic peaks at 13.2° and 27.6°, which is consistent with the standard g-C3N4 (JCPDS 87-1526), representing in-plane packing and interfacial stacking of g-C3N4 nanosheets, respectively [20]. All diffraction peaks of Bi2MoO6 are well indexed to orthorhombic bismuth molybdate (JCPDS 72-1524) [21]. For xCN/BMO and 0.4CN/BMO/9Bi composites, there are only diffraction peaks of Bi2MoO6 and no diffraction peaks of CN and metallic Bi, which are possibly caused by the low contents of g-C3N4 and Bi on the surface of Bi2MoO6.…”

Preparation and Characterization of Macroalgae Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability

“…It is speculated that the Bi 2 MoO 6 can be excited to produce electrons-holes that are attributed to the utilization of solar energy. However, the Kapp value of BKBC (as shown in Figure 10 ) is somehow less than other semiconductor composites such as Bi 2 MoO 6 /graphene with K = 0.0136 min −1 [ 41 ] and Bi 2 MoO 6 /diatomite, 0.05892 min −1 [ 42 ], Bi 2 MoO 6 /Fe 2 O 3, 0.08586 min −1 [ 43 ], Bi 2 MoO 6 /C 3 N 4 , 0.0792 min −1 [ 44 ], and Bi 2 MoO 6 /CNTs/g-C 3 N 4 , 0.0078 min −1 [ 45 ], as listed in Table 5 . This phenomenon may be caused by the excessive high concentration (80 mg/L) of MB.…”

On the diatomite-based nanostructure-preserving material synthesis for energy applications

“…It is worth noting that in the related reports, diatomite was the supporting material. In previous years a number of nanocomposites based on TiO 2 , 46,48,52,53,98,120,145 Bi 2 MoO 6 , 266 BiOCl, 267 Bi 2 S 3 , 268 Ag 3 PO 4 , 269,270 Fe–Mn binary oxide, 271 ZnO 272–274 and Cu 2 O–ZnO 150 etc. as precursor materials and diatomite as a supporting material have been reported.…”