Facile Solvothermal Synthesis of Hollow BiOBr Submicrospheres with Enhanced Visible-Light-Responsive Photocatalytic Performance

Abstract

In this work, hierarchical hollow BiOBr submicrospheres (HBSMs) were successfully prepared via a facile yet efficient solvothermal strategy. Remarkable effects of solvents upon the crystallinities, morphologies, and microstructures of the BiOBr products were systematically investigated, which revealed that the glycerol/isopropanol volumetric ratio played a significant role in the formation of hollow architecture. Accordingly, the underlying formation mechanism of the hollow submicrospheres was tentatively put forward here. Furthermore, the photocatalytic activities of the resulting HBSMs were evaluated in detail with photocatalytic degradation of the organic methyl orange under visible light irradiation. Encouragingly, the as-obtained HBSMs with striking recyclability demonstrated excellent visible-light-responsive photocatalytic performance, which benefits from their large surface area, effective visible light absorption, and unique hollow feature, highlighting their promising commercial application in waste water treatment.

MOFs Derived Hetero-ZnO/Fe2O3 Nanoflowers with Enhanced Photocatalytic Performance towards Efficient Degradation of Organic Dyes

“…As presented in Figure 9b, the unoccupied ones of Fe2O3 demonstrate more negative potential than the ECB potential of ZnO. Under the UV light irradiation, the electrons are exited In the photocatalytic degradation process, a series of reactive oxygen species, such as h + , •OH, or •O 2 − , are normally supposed to be involved in the photocatalytic process [57,58]. In order to investigate why the ZnO/Fe 2 O 3 composite demonstrates more efficient than pure ZnO towards the degradation of organic dyes, the reactive species trapping and hydroxyl radical quantification experiments were conducted.…”

The Facile Synthesis of Hollow CuS Microspheres Assembled from Nanosheets for Li-Ion Storage and Photocatalytic Applications

“…It is deduced that the outstanding degradation efficiency of S-1 stems from the following reasons. Firstly, S-1 has a large specific surface area, so it conveniently absorbs more photons and produces plenty of electron-hole pairs [56]. Secondly, as shown in Figure 6d, the hollow microspheres can reflect the incident light between the inner voids and shells of S-1, enhancing its light absorption capabilities [57,58].…”

Morphology Regulation Mechanism and Enhancement of Photocatalytic Performance of BiOX (X = Cl, Br, I) via Mannitol-Assisted Synthesis

“…Inorganic materials' physical and chemical features, especially optical, magnetic, and electronic properties depending on size, dimensions, and morphology, are also strongly related to the morphology and dimensionality of the semiconductors in their photocatalytic activity [1]. Over the years, many efforts have been made to synthesized BiOX with different morphology such as nanobelts [3], nanowires [4], nanosheets [5], nanoplates [6], nanotubes [3], nanoparticles [7], nanoflowers [8], lamella structures [9], hollow structures [10], and hierarchical nanostructures [6,7].…”