以氧化银为支撑的钨酸锌纳米结构光催化剂在可见光辅助下制氢

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2024.12.552

Ibraheem A. Mkhalid

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引用次数: 0

摘要

由于矿物燃料的广泛消耗以及它们的污染问题，正在作出重大努力寻找替代能源。氢（H2）因其轻量化和生态特性而成为未来的替代能源。近年来，利用半导体光催化剂在光照射下制备氢。为此，在聚合物表面活性剂的存在下，采用溶胶-凝胶法制备了钨酸锌纳米棒。用微量（0.5-2.0 wt%）的氧化银（Ag2O）纳米颗粒支持ZnWO4可以提高可见光的收获。不同的描述装置评价了所制备的纳米材料。结果揭示了负载ZnWO4与Ag2O在电荷复合抑制和分离中的协同作用。利用Ag2O/ZnWO4在可见光照射下从水/甘油混合物中生成H2。1.5 wt%的Ag2O/ZnWO4显示出最小的计算带隙为2.29 eV和最高的光活性。比表面积也记录为115 m2 g−1。当Ag2O/ZnWO4浓度为1.5 wt%时，H2的析出速率比纯ZnWO4提高了约90倍（2.425 mmol g−1h−1）。此外，2.0 mg mL−1的优化剂量使H2的光催化演化达到3.155 mmol g−1h−1，可回收利用率为94.1%。

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Visible-light-assisted hydrogen generation over silver oxide supported zinc tungstate nanostructured photocatalysts

Significant efforts are being made to find alternative energy resources due to the extensive consumption of fossil fuels, in addition to their pollution issues. Hydrogen (H₂) signifies the future alternative energy source due to its lightweight and ecological nature. Lately, hydrogen has been produced over semiconductor photocatalysts under light irradiation. Regarding this, zinc tungstate (ZnWO₄) nanorods have been prepared by a modified sol-gel route in the presence of polymeric surfactant. The visible light harvesting is boosted by supporting ZnWO₄ with trace amounts (0.5–2.0 wt%) of silver oxide (Ag₂O) nanoparticles. Diverse depiction apparatuses appraised the prepared nanomaterials. The outcomes exposed the synergetic influence of supporting ZnWO₄ with Ag₂O in charge recombination suppression and separation. The Ag₂O/ZnWO₄ was utilized for the generation of H₂ under visible-light irradiation from the water/glycerol mixture. The 1.5 wt% Ag₂O/ZnWO₄ revealed the narrowest calculated bandgap of 2.29 eV and the highest photoactivity. The specific surface area also recorded 115 m² g⁻¹. The evolution rate of H₂ is enhanced up to ∼90 times (2.425 mmol g⁻¹h⁻¹) employing 1.5 wt% Ag₂O/ZnWO₄ relative to pure ZnWO₄. Furthermore, the optimized dose of 2.0 mg mL⁻¹ has promoted the photocatalytic evolution of H₂ up to 3.155 mmol g⁻¹h⁻¹ with a recyclable applicability of 94.1 %.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.