Preparation and photocatalytic properties of single-phase Bi2MO6 (M=Mo, W) glass-ceramics

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids Pub Date : 2024-10-29 DOI:10.1016/j.jnoncrysol.2024.123281

Longqing He, Haozhang Liang, Nanshan Ma, Tingxiao Wu, Zhiwei Luo, Anxian Lu

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Abstract

Single-phase Bi₂MO₆ (M=Mo, W) glass-ceramics with photocatalytic activity were obtained by one-step heat treatment of the 51B₂O₃–24Li₂O-7ZnO-2P₂O₅–1Al₂O₃–5Bi₂O₃–10MoO₃/WO₃ parent glasses. The thermal behaviour, phase composition, micromorphology, and network structure of the glasses were investigated, and it was observed that the crystal structure, crystallinity, and microscopic morphology of the glass-ceramics have a significant effect on the photocatalytic activity. XRD and SEM results confirm the precipitation of the monoclinic Bi₂MoO₆ and orthorhombic Bi₂WO₆ crystals, which are nano-spherical and 3D dumbbell-like structures, respectively. The prepared glass-ceramics exhibit a strong absorption in the UV–Vis region. The photocatalytic activity of the Bi₂MO₆ (M=Mo, W) glass-ceramic powders is evaluated by methylene blue dye under UV irradiation. Under the same conditions, the Bi₂WO₆ glass-ceramic powders exhibit a higher photocatalytic activity than the Bi₂MoO₆ glass-ceramic powders. The Bi₂WO₆ glass-ceramic powders achieve a 73% degradation of methylene blue dye after 150 min of irradiation. The difference in photocatalytic activity is mainly related to the crystal structure, crystallinity, and micromorphology of the glass-ceramics. The prepared Bi₂WO₆ glass-ceramic can be used as a photocatalyst for wastewater treatment.

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单相 Bi2MO6（M=Mo，W）玻璃陶瓷的制备与光催化特性

通过对 51B2O3-24Li2O-7ZnO-2P2O5-1Al2O3-5Bi2O3-10MoO3/WO3 母玻璃进行一步热处理，获得了具有光催化活性的单相 Bi2MO6（M=Mo、W）玻璃陶瓷。研究结果表明，玻璃陶瓷的晶体结构、结晶度和微观形态对光催化活性有显著影响。XRD 和 SEM 结果证实了单斜 Bi2MoO6 和正交 Bi2WO6 晶体的析出，它们分别呈纳米球状和三维哑铃状结构。所制备的玻璃陶瓷在紫外可见光区有很强的吸收。在紫外线照射下，用亚甲基蓝染料评估了 Bi2MO6（M=Mo，W）玻璃陶瓷粉末的光催化活性。在相同条件下，Bi2WO6 玻璃陶瓷粉末的光催化活性高于 Bi2MoO6 玻璃陶瓷粉末。照射 150 分钟后，Bi2WO6 玻璃陶瓷粉末对亚甲蓝染料的降解率达到 73%。光催化活性的差异主要与玻璃陶瓷的晶体结构、结晶度和微观形貌有关。制备的 Bi2WO6 玻璃陶瓷可用作废水处理的光催化剂。

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来源期刊

Journal of Non-crystalline Solids 工程技术-材料科学：硅酸盐

CiteScore

6.50

自引率

11.40%

发文量

576

审稿时长

35 days

期刊介绍： The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.