Aurivillius-phase Bi4Ti3O12 nanoparticles structural, surface, and photocatalytic properties for advanced environmental applications

IF 5.9 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2026-05-01 Epub Date: 2026-01-17 DOI:10.1016/j.jpcs.2026.113542

Malla Balakrishna , Bittu Singh , Channamsetti Sushma , Y. Subbareddy , D.V. Satish , M. GnanaKiran , T. Srinivasa Rao , Anchal Aneja , Ramu Boddepalli , Malla Ramanaiah

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Abstract

Bi₄Ti₃O₁₂ (BIT) nanoparticles were successfully synthesized via a sol–gel method, with a well-defined orthorhombic Aurivillius structure and nanocrystallite sizes of 40–60 nm. Raman spectroscopy confirmed the presence of characteristic Ti–O and Bi–O vibrational modes, indicating octahedral distortion critical for functional properties. X-ray photoelectron spectroscopy (XPS) revealed Bi 4f peaks at 158.7 eV and 164.0 eV, confirming the Bi³⁺ oxidation state, Ti 2p doublets at 458.5 eV and 464.2 eV corresponding to Ti⁴⁺, and an O 1s peak at 529.6 eV associated with lattice oxygen. Field-emission scanning electron microscopy (FESEM) showed nanoplate-like morphology with an average particle size of ∼270 nm and homogeneous elemental distribution. The BIT nanoparticles exhibited excellent visible-light photocatalytic activity, degrading ∼90 % of methylene blue within 120 min. The degradation followed pseudo-first-order kinetics, with rate constants decreasing from 0.1414 to 0.0363 min-1 as dye concentration increased. The combination of high crystallinity, chemical purity, nanoscale morphology, and strong photocatalytic performance highlights BIT nanoparticles as promising candidates for multifunctional applications including wastewater treatment, environmental remediation, photovoltaic devices, and ferroelectric memory technologies.

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aurivillius相Bi4Ti3O12纳米颗粒的结构，表面和光催化性能在先进的环境应用

采用溶胶-凝胶法制备了Bi4Ti3O12 （BIT）纳米颗粒，具有良好的正交Aurivillius结构，纳米晶粒尺寸为40 ~ 60 nm。拉曼光谱证实了Ti-O和Bi-O振动模式的存在，表明八面体畸变对功能特性至关重要。x射线光电子能谱（XPS）显示bi4f峰位于158.7 eV和164.0 eV，证实了Bi3+的氧化态，ti2p重态在458.5 eV和464.2 eV对应Ti4+， o1s峰位于529.6 eV与晶格氧相关。场发射扫描电镜（FESEM）显示出纳米片状形貌，平均粒径为~ 270 nm，元素分布均匀。BIT纳米颗粒表现出优异的可见光光催化活性，在120分钟内降解约90%的亚甲蓝。随着染料浓度的增加，降解速率常数从0.1414 min-1降低到0.0363 min-1。高结晶度、化学纯度、纳米级形态和强光催化性能的结合突出了BIT纳米颗粒在多功能应用方面的前景，包括废水处理、环境修复、光伏器件和铁电存储技术。

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来源期刊

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.