Advancing green energy: Sustainable power generation via NBT-based sodium-substituted ferrite nanocomposites

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2025-07-07 DOI:10.1016/j.jpcs.2025.112984

Monika Dhall , Vishal Jakhar , Satish Khasa , Ashima Hooda , Jyoti Shah , R.K. Kotnala

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Abstract

In the quest for sustainable energy, Hydroelectric cells (HECs) have emerged as a groundbreaking alternative to fuel cells and solar cells, offering a cost-effective and eco-friendly route to electricity generation. This study presents a novel approach to engineering high-performance HECs using (1-x) Na_0.5Bi_0.5TiO₃ - x Na_0.2Mg_0.8Fe₂O₄, (NBT-NMFO) nanocomposites, synthesized via the solid-state reaction method. By strategically tuning oxygen vacancies through compositional variations, a remarkable enhancement in water dissociation efficiency is achieved. Lattice mismatch and ionic radius disparities induced substantial strain and structural defects, creating active sites for water molecule adsorption and dissociation. These modifications were systematically analyzed using X-ray diffraction (XRD), Williamson-Hall (WH) analysis, High-resolution transmission electron microscopy (HRTEM), photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS), confirming a progressive rise in defect density and oxygen vacancies with increasing NMFO content. Field-emission scanning electron microscopy (FESEM) and Brunauer–Emmett–Teller (BET) confirmed the porous morphology of the synthesized nanocomposites. Dielectric and conductivity analyses in the wet state highlighted their potential for hydroelectric cell (HEC) applications. Electrochemical impedance spectroscopy (EIS) and Nyquist plot modeling revealed a significant reduction in charge transfer resistance, particularly in Na-substituted magnesium ferrite. Notably, Na_0.2Mg_0.8Fe₂O₄-based HEC (2 × 2 cm²) achieved the highest offload current, soaring from 1.05 mA (NBT) to 14.65 mA (NMFO), attributed to minimal charge transfer resistance (0.022 Ω), pronounced lattice strain (2.82 × 10⁻³), enhanced nanoporosity, and abundant defect states. These results establish HECs as a transformative technology for next-generation clean energy and a promising step toward sustainable energy independence.

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推进绿色能源：利用nbt基钠取代铁氧体纳米复合材料实现可持续发电

在寻求可持续能源的过程中，水电电池（HECs）已经成为燃料电池和太阳能电池的突破性替代品，提供了一种成本效益高且环保的发电方式。本研究提出了一种利用（1-x） Na0.5Bi0.5TiO3 -x Na0.2Mg0.8Fe2O4, （NBT-NMFO）纳米复合材料，通过固相反应法合成高性能HECs的新方法。通过调整氧空位的组成变化，显著提高了水的解离效率。晶格失配和离子半径差异导致了大量的应变和结构缺陷，为水分子的吸附和解离创造了活性位点。利用x射线衍射（XRD）、Williamson-Hall （WH）分析、高分辨率透射电镜（HRTEM）、光致发光（PL）和x射线光电子能谱（XPS）对这些修饰进行了系统分析，证实随着NMFO含量的增加，缺陷密度和氧空位逐渐增加。场发射扫描电镜（FESEM）和布鲁诺尔-埃米特-泰勒（BET）证实了合成的纳米复合材料的多孔形貌。在湿态下的介电和电导率分析突出了它们在水电电池（HEC）应用中的潜力。电化学阻抗谱（EIS）和Nyquist图模型显示电荷转移电阻显著降低，特别是在na取代铁氧体镁中。值得注意的是，基于na0.2 mg0.8 fe2o4的HEC （2 × 2 cm2）获得了最高的卸载电流，从1.05 mA （NBT）飙升至14.65 mA (NMFO)，这归功于最小的电荷转移电阻（0.022 Ω）、明显的晶格应变（2.82 × 10−3）、增强的纳米孔隙度和丰富的缺陷态。这些结果表明，HECs是下一代清洁能源的变革性技术，是实现可持续能源独立的有希望的一步。

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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.