Journal of Solid State Chemistry最新文献

{"title":"Problems of synthesis and ordering of the medium-entropy perovskite PbSc1/4In1/4Nb1/4Ta1/4O3","authors":"Ivan G. Sheptun ,&nbsp;Inna V. Lisnevskaya ,&nbsp;Elena A. Reshetnikova ,&nbsp;Olga Yu. Grapenko ,&nbsp;Elizaveta S. Kulikova ,&nbsp;Alexey Yu. Seregin ,&nbsp;Victoria A. Shuvaeva ,&nbsp;Nikita V. Ter-Oganessian","doi":"10.1016/j.jssc.2025.125767","DOIUrl":"10.1016/j.jssc.2025.125767","url":null,"abstract":"<div><div>A comparative study of the medium-entropy perovskite PbSc_1/4In_1/4Nb_1/4Ta_1/4O₃ (PSINT), synthesized by solid-state reaction, melt-solution (flux) crystallization, and the gel (sol–gel) route, was carried out. High-resolution synchrotron X-ray diffraction was employed to ensure methodological consistency across all samples. In the solid-state route, prolonged annealing at 800 °C for 100 h completely eliminates the residual pyrochlore impurity, yielding a single-phase cubic perovskite (<em>Pm–3m</em>, <em>a</em> = 4.09538(5) Å). Flux growth produces two crystal types—perovskite and pyrochlore—with compositions deviating from the nominal due to cation segregation in the melt and partial <em>B</em>-site ordering. Superstructure reflections, corresponding to double and triple perovskite cell <em>with a</em> = 4.08661(14) Å, are observed at the diffraction patterns. These reflections presumably originate from mixed 1:1 and 1:2 <em>B</em>-site cation ordering. The gel route proceeds through a transient pyrochlore intermediate that transforms into perovskite near 800 °C. Stabilization of the perovskite structure has been achieved due to an optimum fluorine concentration of about 0.04 at.% per mole of PSINT, whereas reduction of this value, caused by fluorine depletion at higher temperatures (900–1100 °C), leads to regeneration of the pyrochlore phase. The gel-derived PSINT shows the lowest atomic displacement parameters and the highest structural homogeneity. These results provide new information on the influence of synthesis environment on the characteristics of medium-entropy oxide perovskites.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125767"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The flexible covalent organic frameworks containing tetraphenylethylene (TPE) for the detection of 2,4-dinitrophenol and uptaking iodine","authors":"Qi Peng","doi":"10.1016/j.jssc.2025.125778","DOIUrl":"10.1016/j.jssc.2025.125778","url":null,"abstract":"<div><div>Tetraphenylethene (TPE) is a typical aggregation-induced emission chromophore. However, there are no reports on the flexible COFs containing TPE units until now. Herein, two flexible TPE-COFs (HTATPE and TTATPE) were synthesized via Schiff base polymerization reaction. HTATPE and TTATPE exhibit significantly large specific areas of 2274 and 1777 m² g⁻¹, respectively, along with high thermal stability, and partial crystallinity. The flexible TPE-COFs demonstrate high sensitivity in fluorescence detection for 2,4-dinitrophenol (DNP). Their K_SV values are measured at 3.96 × 10⁴ and 3.30 × 10⁴ M⁻¹. Their fluorescence sensing mechanisms to DNP were PET and IFE process. The recovery experiment in river sand samples proved that TTATPE has sufficient sensitivity as a chemical sensor for DNP in environmental samples. The iodine capture capacities of HTATPE and TTATPE were 4.28/4.04 g g⁻¹, 24.71/24.61 mg g⁻¹, and 284.85/287.26 mg g⁻¹ in the I₂ vapor at 350 K, 100 mg L⁻¹ iodine-cyclohexane solution, and 300 mg L⁻¹ iodine-water solution. The iodine adsorption behaviors conformed to the pseudo-first-order model. PXRD and Raman spectra showed that iodine absorption is a chemical adsorption process caused by charge transfer.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125778"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structure–optical–dielectric correlations in ordered double perovskites Sr2(Co1-xZnx)TeO6 (0 ≤ x ≤ 1)","authors":"Asmaa Zaraq ,&nbsp;Duncan H. Gregory ,&nbsp;Doriano Brogioli ,&nbsp;Fabio La Mantia ,&nbsp;Thorsten M. Gesing","doi":"10.1016/j.jssc.2025.125775","DOIUrl":"10.1016/j.jssc.2025.125775","url":null,"abstract":"<div><div>The double perovskite series Sr₂(Co_<em>1-x</em>Zn_<em>x</em>)TeO₆ (<em>x</em> = <em>0, 0.25, 0.50, 0.75, 1</em>) has been synthesized and systematically investigated to establish the correlations between structure, optical response, and dielectric behavior. Powder X-ray diffraction and Rietveld refinement confirm that Sr₂CoTeO₆ crystallizes in the monoclinic <em>P</em>2₁/<em>n</em> structure, Sr₂ZnTeO₆ in I2/m, and the intermediate compositions in <em>I</em>2/<em>m</em> as well. Structural refinements reveal opposite compositional trends in Co/Zn–O and Te–O bond lengths, directly influencing the vibrational dynamics: Raman spectra display progressive blue-shifts of Te–O stretching modes, particularly near 750 cm⁻¹. Optical diffuse reflectance measurements, analyzed via Tauc and derivative absorption spectroscopy fitting, show a systematic widening of the band gap from 3.21 eV (<em>x</em> = <em>0</em>) to 4.13 eV (<em>x</em> = <em>1</em>), consistent with the reduction of Co²⁺ contributions near the band edge. Dielectric spectroscopy further highlights a strong dependence on composition. While Zn-rich members exhibit insulating behavior with stable permittivity and low loss over 100 Hz–1 MHz, the Co-rich end member Sr₂CoTeO₆ displays an anomalous dispersion with a crossover from Maxwell–Wagner interfacial polarization to dipolar polarization at ∼300 kHz, as confirmed by Cole–Cole analysis (ε_s ≈ 320, τ ≈ 3.3 μs). This unusually high transition frequency stabilizes the dielectric response over a broad frequency window. Taken together, these results demonstrate clear structure–optical–dielectric correlations across the Sr₂(Co_<em>1-x</em>Zn_<em>x</em>)TeO₆ series. The Co-rich composition combines a high permittivity and frequency stability, underscoring its potential for dielectric capacitor applications, while Zn substitution tunes the material toward wider band gaps and enhanced optical insulation.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125775"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Terephthalate-based covalent organic framework as high-performance anode material for sodium-ion storage and full cell","authors":"Kun Chu ,&nbsp;Tingting Cheng ,&nbsp;Taixing Zhu ,&nbsp;Zhengyu Huang ,&nbsp;Guichao Liu ,&nbsp;Shaowen Wu ,&nbsp;Ming-Ming Hu ,&nbsp;Shihua Dong","doi":"10.1016/j.jssc.2025.125768","DOIUrl":"10.1016/j.jssc.2025.125768","url":null,"abstract":"<div><div>Carboxylate-based anode materials have substantial application potential for sodium-ion batteries (SIBs) used for large scale electrochemical energy storage owing to their advantages of high specific capacity, cost-effective and sustainability. Covalent organic frameworks (COFs) are able to improve the cycling stability and rate performance of small organic compound due to their designable compositions and stable porous structures. Herein, terephthalic acid (TPA) was reacted with hexachlorocyclotriphosphazene (HCCP) via polycondensation to prepare TPA-HCCP COF. The prepared COF anode exhibits a low discharge potential of 0.26 V, high reversible specific capacity of 120 mA h g⁻¹ and good rate performance due to its stable microporous framework with abundant accessible active sites. Sodium-ion storage kinetics of the COF is a combination process of diffusion and capacitance due to the electroactive sites of C<img>O and coordinate sites of N for sodium-ions. Full cell was fabricated using Na₄Fe₃(PO₄)₂(P₂O₇) (NFPP) as cathode material to evaluate the practical application potential of the COF anode at wide operation temperature. The NFPP||COF full cell exhibited a high mean voltage of 3.0 V and delivered a specific discharge capacity of 118 mA h g⁻¹. This research provides an effective strategy of designing and preparing terephthalate-based COF anode material and validates its practical application potential for SIBs.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125768"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Schiff base with J-aggregation-induced emission and controllable solid fluorescence","authors":"Mingguang Zhu ,&nbsp;Yulin Duan ,&nbsp;Lingyuan Li ,&nbsp;Jiamin Chen ,&nbsp;Shunyan Wang ,&nbsp;Lihui Yang ,&nbsp;Meihui Chen ,&nbsp;Yaohui You","doi":"10.1016/j.jssc.2025.125782","DOIUrl":"10.1016/j.jssc.2025.125782","url":null,"abstract":"<div><div>Fluorochromic organic materials capable of changing emitting color were attractive in intelligent material applications but how to carry out large-scale production in an easy and efficient manner remained a challenge. Here we presented a pair of Schiff bases, in which 2-hydroxy-4-methoxybenzophenone hydrazone was decorated with 4-nitrobenzaldehyde and 2,4-dinitrobenzaldehyde, respectively. Although both of them did not undergo excited state intramolecular proton transfer (ESIPT) process in EtOH solvent upon photoexcitation, introduction of electron-withdrawing –NO₂ group endowed them with <em>J</em>-type aggregation-induced emission (AIE) features in the EtOH/water binary mixtures, emitting pink and cyan-blue fluorescence with the maximum emission peaks at around 627 and 538 nm, respectively. Notably, although they had the same molecular framework, the differences in the number and position of nitro substituents played a key role in tuning molecular packing arrangement in the solid state, showing vivid red and dull red emission color, respectively. Importantly, crystallizing 4-nitrobenzaldehyde-functionalized Schiff base in pure EtOH and EtOH/water mixtures (v/v, 1/1) afforded red and yellow fluorescence solids with different fluorescence efficiencies because the varying degrees of <em>J</em>-aggregation during the self-assembly in pure EtOH and EtOH/water mixtures (v/v, 1/1) resulted in different crystal sizes. This study provided a significative method for construction of strong long-wavelength emissive <em>J</em>-aggregates based on Schiff base structure and realizing large-scale and simple preparation of controllable solid fluorescence at the single-molecule level.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125782"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural properties of Mg-Zn-Ca metallic glass induced by cooling rates studied by molecular dynamics simulations","authors":"Ruiqi Liu ,&nbsp;Xiangwen Yan ,&nbsp;Yunzhou Guan ,&nbsp;Jincheng Ji ,&nbsp;Changxin Li","doi":"10.1016/j.jssc.2025.125785","DOIUrl":"10.1016/j.jssc.2025.125785","url":null,"abstract":"<div><div>The cooling rate is a critical processing parameter that determines the microstructure and macroscopic properties of metallic glasses, therefore, molecular dynamics simulations were employed to investigate the effects of cooling rate on the microstructure evolution and mechanical properties of Mg-Zn-Ca metallic glass in this work. The structural analysis results indicate that Mg-Zn-Ca melt could form metallic glass with uniformly distributed atoms at different cooling rates, and the Zn-centered clusters exhibited a more regular arrangement. Voronoi analysis reveals that the total content of icosahedral-like clusters is the highest, followed by mixed clusters, and crystal-like clusters is the lowest. Notably, the content of ⟨0,0,12,0⟩-type cluster centered by Zn is always higher than that centered by other types of atoms, indicating that Zn atoms have a stronger tendency to form perfect icosahedral structures. The uniaxial tensile simulation results show that the elastic modulus of Mg-Zn-Ca metallic glass decreases with the increase of cooling rate, and this aligns with the variation trend of the content of icosahedral-like clusters in the system. The underlying mechanism is attributed to the fact that the regularity of icosahedral structures can effectively alleviate local stress concentration, thereby enhancing the elastic modulus of metallic glass. This study provides theoretical support for the design and performance regulation of new metallic glass components.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125785"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamics and interdiffusion of the Y–Nd, Y–Tb and Tb–Nd systems","authors":"Chengliang Qiu ,&nbsp;Shuhong Liu ,&nbsp;Xiangyang Yin ,&nbsp;Juan Chen ,&nbsp;Wei Zhai ,&nbsp;Yong Du","doi":"10.1016/j.jssc.2025.125786","DOIUrl":"10.1016/j.jssc.2025.125786","url":null,"abstract":"<div><div>Based on the available experimental data reported in the literature, the Y–Nd, Y–Tb and Tb–Nd systems were re-assessed thermodynamically using the CALPHAD (CALculation of PHAse Diagram) method in this work. The calculated phase diagrams of the three binary systems are well consistent with the experimental results. Based on the calculated phase diagrams, 9 solid-solid diffusion couples in hcp phase region were prepared and annealed at 900, 1000, and 1100 °C. The concentration distributions were measured using Electron Probe Microanalysis (EPMA), and the interdiffusion coefficients at different temperatures were evaluated through the Sauer–Freise approach. Subsequently, the CALTPP (CALculation of Thermo-Physical Properties) software was applied to optimize the atomic mobilities as functions of both temperature and composition by integrating the thermodynamic assessment with the experimental diffusion data. The simulated diffusion behavior exhibited good consistency with the experimental results, confirming the reliability of the optimized mobility parameters.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125786"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lanthanide-aminoisophthalates: From temperature-dependent photoluminescence and colorimetry to ratiometric thermometry","authors":"Thammanoon Chuasaard ,&nbsp;Malee Sinchow ,&nbsp;Bunlawee Yotnoi ,&nbsp;Athipong Ngamjarurojana ,&nbsp;Nobuto Yoshinari ,&nbsp;Apinpus Rujiwatra","doi":"10.1016/j.jssc.2025.125799","DOIUrl":"10.1016/j.jssc.2025.125799","url":null,"abstract":"<div><div>To study the effect of the amino substituent of the organic ligand on photoluminescent and colorimetric properties and therefore thermometric properties of lanthanide coordination polymers, 5-aminoisophthalic acid (NH₂–H₂aip) was used to synthesize a new series of lanthanide coordination polymers. They are the homometallic [Ln^III(NH₃⁺-aip)(NH₂-aip)(H₂O)₂]∙1.25H₂O (Ln^III = Pr^III, Nd^III, Sm^III, Eu^III, Gd^III and Tb^III) and the bimetallic [Eu^III_xTb^III_1-x(NH₃⁺-aip)(NH₂-aip)(H₂O)₂]∙1.25H₂O. Their structures and properties were fully characterized. The single crystal structures were elucidated. The singlet and triplet state energies of the mixed NH₃⁺-aip^2-/NH₂-aip^2- ligands were estimated and the photoluminescent and colorimetric properties of the synthesized frameworks were studied in the solid state at room temperature. The lifetimes and quantum yields of the emissions of Sm^III, Eu^III and Tb^III frameworks were also determined revealing the crucial role of Tb^III as the sensitized center and Eu^III as the emission center in the bimetallic frameworks. To evaluate potential of the bimetallic frameworks in ratiometric thermometry, their temperature-dependent photoluminescent and colorimetric responses were explored. Thermometric parameters were determined based on both responses, and the linear temperature dependence was derived. Within the temperature range of 25.0–80.0 °C, sensitivity, accuracy and precision of the temperature measurements were then demonstrated reflected through the noteworthy thermal sensitivity (2.05 and 4.69 %∙<em>K</em>⁻¹) as well as excellent uncertainty and repeatability (<em>ca.</em> 97 % for ten successive cycles). The reducing uncertainty of the colorimetric-based measurements at elevated temperatures was also illustrated.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125799"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ba2CrIO3F6: a magnetic alkaline-earth chromium fluoroiodate with ferromagnetic exchange interactions","authors":"Shuaikun Li ,&nbsp;Yanhong Wang ,&nbsp;Haibo Li ,&nbsp;Hang Liu ,&nbsp;Yun Lv ,&nbsp;Hongcheng Lu","doi":"10.1016/j.jssc.2025.125796","DOIUrl":"10.1016/j.jssc.2025.125796","url":null,"abstract":"<div><div>A novel magnetic alkaline-earth chromium fluoroiodate Ba₂CrIO₃F₆ has been successfully synthesized via the hydrothermal method and characterized for its structure and physical properties by single crystal X-ray diffraction, attenuated total reflection (ATR) infrared spectroscopy, UV–vis–NIR spectroscopy, thermal stability, as well as magnetic susceptibility, and specific heat. The compound Ba₂CrIO₃F₆ contains the [CrIO₃F₆]^4- spin chains which are further separated by nonmagnetic Ba²⁺ cations. The magnetic susceptibility results show no long-range magnetic order down to 2 K, which are further confirmed by specific heat measurement. The positive Weiss temperature and the increase of <em>χT</em>-<em>T</em> curve at low temperature both suggest the magnetic exchange interactions through the Cr³⁺−IO₄F–Cr³⁺ pathway are unexpectedly ferromagnetic. Our work illustrates that it is promising to use the [IO_<em>x</em>F_<em>y</em>]^{<em>n^–</em>} anion group for the design and construction of novel magnetic materials with ferromagnetic exchange interactions for potential spintronics device applications.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125796"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced charge separation in Ce-doped TiO2 heterophase junctions: Mechanistic insights from in-situ XPS and ATR-FTIR studies","authors":"Haixiao Kang ,&nbsp;Haifeng Yuan ,&nbsp;Haidong Zhang ,&nbsp;Xianghua Kong ,&nbsp;Yuquan Wang ,&nbsp;Siying Zhang ,&nbsp;Jiamei Liu","doi":"10.1016/j.jssc.2025.125790","DOIUrl":"10.1016/j.jssc.2025.125790","url":null,"abstract":"<div><div>Doping and heterophase junctions are known to improve TiO₂ photocatalysts, but their synergistic effect is not fully understood. In this work, we use <em>in-situ</em> XPS and ATR-FTIR to directly observe this synergy in Ce-doped TiO₂, revealing how charge separation and the degradation pathway are enhanced. The obtained catalyst demonstrated good performance in the photocatalytic degradation of methyl orange (MO). Comprehensive characterization techniques, including XRD, Raman, XPS, and TEM, confirmed the successful formation of heterophase junctions and the incorporation of Ce ions into the TiO₂ lattice. The findings also indicate that this process induced lattice expansion and modified the surface electronic structure. The optimized catalyst with 0.1 wt% Ce doping (Ce₀_·₁Ti) exhibited superior photocatalytic activity, achieving 84 % degradation of MO within 60 min under UV light. Its catalytic rate was found to be three times higher than that of undoped TiO₂ catalysts. Meanwhile, the catalyst demonstrated excellent cycling stability. The enhancement of catalytic activity can be attributed to the cooperative effect between the TiO₂ A/R heterophase junctions and Ce³⁺/Ce⁴⁺ redox electron pair, which promotes the separation and migration of photogenerated carriers. <em>In-situ</em> XPS analysis directly confirmed this mechanism. Furthermore, <em>in-situ</em> ATR-FTIR analysis revealed the possible degradation pathway of MO, including cleavage of azo bonds and subsequent oxidation steps for intermediates. This study provides a strategic design of doped heterophase junctions for high-performance photocatalytic applications.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"355 ","pages":"Article 125790"},"PeriodicalIF":3.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}