Effect of air annealing on structural, textural, thermal, magnetic and photocatalytic properties of Ag-doped mesoporous amorphous crystalline nanopowders Bi2O3

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2024-09-05 DOI:10.1016/j.nanoso.2024.101319

V.G. Ilves, V.S. Gaviko, A.M. Murzakaev, S.Y. Sokovnin, O.A. Svetlova, M.G. Zuev, M.A. Uimin

引用次数: 0

Abstract

Ag doped BiO nanopowders (NPs) were produced by pulsed electron beam evaporation (PEBE) under vacuum. The solid phase synthesis in an electric furnace on air was used for silver doping of bismuth oxide. Different physicochemical properties of NPs have been studied. The specific surface area of (SSA) Ag- BiO NPs was 23.7 m/g. Air annealing (200 °C) caused decreased crystallinity and an increase in the SSA of both pure and Ag-doped bismuth oxide. The dominant phase in not annealed/annealed Ag doped BiO NPs at 200 °C and 300 °C was β -phase BiO. The thermal stability of the pure and Ag-doped BiO NPs was maintained at 300–350 °C. The phase transition β→α occurred with a further increase in temperature. The annealing temperature could effectively change the physicochemical properties of the BiO NPs.

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空气退火对掺银介孔无定形结晶纳米粉体 Bi2O3 的结构、纹理、热、磁和光催化性能的影响

在真空条件下通过脉冲电子束蒸发（PEBE）制备了掺银氧化铋纳米粉体（NPs）。氧化铋的银掺杂采用电炉在空气中进行固相合成的方法。对 NPs 的不同物理化学特性进行了研究。(SSA) Ag- BiO NPs 的比表面积为 23.7 m/g。空气退火（200 °C）导致纯氧化铋和掺杂银的氧化铋结晶度降低，比表面积增加。在 200 ℃ 和 300 ℃ 条件下，未退火/退火的掺银氧化铋氮磷中的主要相为 β 相氧化铋。纯 BiO NPs 和掺银 BiO NPs 的热稳定性保持在 300-350 ℃。随着温度的进一步升高，出现了 β→α 相变。退火温度能有效地改变 BiO NPs 的物理化学性质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .