Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Improving photocatalytic degradation of Ethylparaben over Ag nanoparticles decorated BiVO4 Photocatalyst","authors":"Quang-Khang Nguyen ,&nbsp;Que-Minh T. Doan ,&nbsp;Thanh Khoa Phung ,&nbsp;Trinh Duy Nguyen","doi":"10.1016/j.jphotochem.2026.117073","DOIUrl":"10.1016/j.jphotochem.2026.117073","url":null,"abstract":"<div><div>In this work, a simple and cost-effective method is proposed to synthesize Ag/BiVO₄ heterojunction photocatalyst, a material already popular and well-studied for its photocatalytic performance. The aim is to retain the necessary structural, optical and electrochemical properties of the materials while enhancing their photocatalytic activity. BiVO₄ was synthesized by solvothermal method, followed by depositing Ag nanoparticles via photoreduction using either 40 W LED and 300 W Xenon light. The prepared products were further characterized through various advanced techniques. The photocatalyst activities of the as-synthesized photocatalysts were evaluated by monitoring the photocatatytic degradation of ethylparaben under visible light irradiation. The results indicated that the Ag/BiVO₄ heterojunction photocatalysts treated under both 40 W LED 0and 300 W Xenon light exhibited significantly improved in photocatalytic activity compared to bare BiVO₄. Notably, the optimized 10%-Ag/BiVO₄ catalyst treated under a 40 W LED retained its optimal structure and achieved highly efficient ethylparaben degradation, reaching approximately 94% removal efficiency within 240 min of irradiation. Futhermore, the photocatalytic activity of the Ag/BiVO₄ catalyst under 40 W LED was higher than that under 300 W Xenon light, highlighting the advantage of LED illumination, which combines high activity with lower operating costs compared to Xenon lamps. The improvement in photocatalytic peformance of Ag/BiVO₄ is primarily attributed to the localized surface plasmonic resonance (LSPR) effect of Ag nanoparticles, which facilitates the electron/hole separation and electrons promotes transfer for production of •O₂⁻ radicals, thus improving the overall photocatalytic activity. The research also investigates the mechanism of the reaction, the stability of the catalyst and provides insights into developing superior materials for treating persistent organic pollutants in wastewater.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117073"},"PeriodicalIF":4.7,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081390","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":"Predicting power conversion efficiency in donor-acceptor pairs for organic solar cells using machine learning ensemble models","authors":"Kapil Dev Mahato","doi":"10.1016/j.jphotochem.2026.117066","DOIUrl":"10.1016/j.jphotochem.2026.117066","url":null,"abstract":"<div><div>Machine learning (ML) has emerged as a powerful approach for accelerating the design of efficient organic solar cells (OSCs) by correlating molecular features with device performance. However, predictive modeling of power conversion efficiency (PCE) remains challenging due to the small size and heterogeneity of available experimental datasets. In this study, we propose a robust and data-efficient ensemble learning framework for accurately predicting PCE in donor-acceptor (D-A) molecular pairs. A dataset of 319 experimentally derived D-A combinations, containing key electronic and molecular descriptors, was employed to develop five regression models: Fine Tree (FT), Medium Tree (MT), Coarse Tree (CT), Bagged Tree (BGT), and Boosted Tree (BST). Among the models examined, the BST ensemble outperformed the others, achieving an R² of 88.75%, a minimum MAE of 0.522, and an RMSE of 0.725 for validation, as well as an R² of 85.26%, a minimum MAE of 0.549, and an RMSE of 0.734 for testing. The proposed framework integrates SMILES-derived molecular fingerprints with ensemble learning to capture complex, nonlinear interactions between donor and acceptor features, enabling the reliable estimation of efficiency even with limited data. This work highlights that data-driven ensemble approaches can serve as accurate and computationally economical methods for estimating the physical/chemical properties of OSC. The outcomes are expected to enable researchers to conduct rapid screening and develop next-generation OSC materials.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117066"},"PeriodicalIF":4.7,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057600","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":"Synthesis of piezoelectric catalyst LiTaO3 and its application in efficient degradation of organic pollutants","authors":"Siyu Liao ,&nbsp;Dongyang Jiang ,&nbsp;Yuxian Duan ,&nbsp;Zhi Li ,&nbsp;Weida Chen ,&nbsp;Zeli Deng ,&nbsp;Guanghong Liu ,&nbsp;Qianxu Ye ,&nbsp;Shijie Sun ,&nbsp;Liexing Zhou ,&nbsp;Jinming Cai ,&nbsp;Hongyou Li ,&nbsp;Guo Chen","doi":"10.1016/j.jphotochem.2026.117071","DOIUrl":"10.1016/j.jphotochem.2026.117071","url":null,"abstract":"<div><div>Lithium tantalate (LiTaO₃) powder was synthesized via a simple and efficient method employing LiF and Ta₂O₅ as raw materials, making its inaugural application in the piezoelectric catalytic degradation of organic dye. Subjected to ultrasonic vibration, LiTaO₃ powder degraded 100% Rhodamine B dye within a 16-min period, demonstrating the reaction rate constants (<em>k</em>) of 0.28012 min⁻¹. Even after six catalytic cycles, the degradation rate remained 94%. Mechanistic investigations revealed that hydroxyl radicals (•OH) and superoxide radicals (•O₂⁻) predominantly drive the piezoelectric catalytic degradation of RhB. This research introduces innovative strategies and methodologies for synthesizing and utilizing new piezoelectric catalysts, thus making significant contributions to the development of efficient and sustainable technologies for environmental remediation.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117071"},"PeriodicalIF":4.7,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078251","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":"Silicon-modified black TiO2 photocatalysts as a sustainable platform for micropollutant degradation under full-spectrum solar irradiation","authors":"Athira Vijayan ,&nbsp;Luminita Andronic ,&nbsp;Kandasamy Muthusamy ,&nbsp;Samson Yuxiu Lai ,&nbsp;Halil Arslan ,&nbsp;Anatolijs Sarakovskis ,&nbsp;Jeyanthinath Mayandi ,&nbsp;Smagul Karazhanov","doi":"10.1016/j.jphotochem.2026.117061","DOIUrl":"10.1016/j.jphotochem.2026.117061","url":null,"abstract":"<div><div>Conventional wastewater treatment technologies are often ineffective in eliminating persistent micropollutants, such as neonicotinoid pesticides, which pose significant risks to ecosystems and human health. To address this challenge, silicon-modified black titanium dioxide (Si-b-TiO₂) photocatalysts were synthesised via a sol–gel route followed by chemical reduction, targeting sustainable environmental remediation under full-spectrum solar irradiation. Controlled Si incorporation (1–15 wt%) tuned the structural, optical, and electronic properties of black TiO₂, as confirmed by XRD, TEM, and XPS and FT-IR analyses. Silicon modification suppressed electron–hole recombination and enhanced visible-light absorption, accompanied by increased generation of reactive oxygen species, as evidenced by hydroxyl radical (<span><math><msup><mi>HO</mi><mo>∙</mo></msup></math></span>) probing using terephthalic acid fluorescence. The optimised Si1-b-TiO₂ photocatalyst achieved an imidacloprid degradation efficiency of approximately 70% within 180 min under full-spectrum irradiation, compared to ∼34% for pristine black TiO₂, corresponding to an apparent rate constant of k = 6.84 ⋅ 10⁻³ min⁻¹. In addition, the catalyst retained more than 90% of its initial activity after five consecutive degradation cycles, demonstrating good operational stability. At higher Si loadings (≥5 wt%), performance decreased due to pore blockage and recombination, underlining the importance of controlled doping. This work demonstrates that Si-modified black TiO₂ provides a cost-effective and scalable material platform for solar-driven water purification, contributing to the development of sustainable technologies for mitigating micropollutants.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117061"},"PeriodicalIF":4.7,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078252","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":"TTP/UiO-66-NH2 hybrid: a high-performance ratiometric fluorescent probe for the selective and rapid detection of chlortetracycline at a wide pH range.","authors":"Shili Qin ,&nbsp;Yuting Qin ,&nbsp;Fenglong Jin ,&nbsp;Dongsheng Zhao ,&nbsp;Xinyu Liang ,&nbsp;Liming Bai ,&nbsp;Hongtao Chu ,&nbsp;Lidi Gao ,&nbsp;Shuren Liu","doi":"10.1016/j.jphotochem.2026.117070","DOIUrl":"10.1016/j.jphotochem.2026.117070","url":null,"abstract":"<div><div>The integration of covalent organic frameworks (COFs) and metal-organic frameworks (MOFs) into hybrid materials capitalizes on the advantageous properties of both classes of materials, particularly addressing the aggregation-caused quenching effect associated with COFs to enhance their luminescence. Furthermore, COF/MOF hybrid materials represent a promising approach for the development of ratiometric fluorescent methods. In this study, we synthesized a hybrid material, TTP/UiO-66-NH₂, characterized by the robust attachment of TTP COF to the surface of UiO-66-NH₂ MOF via a Schiff base reaction. The TTP/UiO-66-NH₂ hybrid material combined the strengths of both components, exhibiting remarkable stability, a broad pH tolerance, and excellent dual-emission fluorescence. Additionally, as a dual-emission fluorescent probe, TTP/UiO-66-NH₂ effectively identified chlorotetracycline in three animal-derived food samples. This fluorescent probe demonstrated high selectivity, strong specificity, and superior anti-interference capabilities, along with a rapid response time of 25 s, a wide pH range (3.0–9.0), a high recovery rate (89.73–112.05%), an extensive linear range (0–220 μmol/L), and low detection limits (0.089–0.095 μmol/L). This research provided a novel fluorescent probe for the detection of chlorotetracycline and opened avenues for further applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117070"},"PeriodicalIF":4.7,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081391","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":"Reinforced photodegradation of tetracycline by a novel 1D/3D Bi4V2O11/Bi5O7I heterojunction: Multi-electric field tuning via S-scheme charge migration and oxygen vacancy","authors":"Yurou Chen,&nbsp;Zhongquan Jiang,&nbsp;Fangyan Chen,&nbsp;Yanhua Song,&nbsp;Yubin Tang","doi":"10.1016/j.jphotochem.2026.117059","DOIUrl":"10.1016/j.jphotochem.2026.117059","url":null,"abstract":"<div><div>Construction of S-scheme heterojunctions, defect engineering, and design of surface dimension are all efficient methods for improving the photocatalytic property of semiconductors. In this work, a novel 1D/3D Bi₄V₂O₁₁/Bi₅O₇I heterojunction with a synergistic modulation of oxygen vacancies (OVs) and an S-scheme charge migration was constructed. The fabricated Bi₄V₂O₁₁/Bi₅O₇I heterojunction was applied in the photodegradation of tetracycline (TC) under visible-light illumination. Bi₄V₂O₁₁/Bi₅O₇I exhibits significantly reinforced photocatalytic performance relative to the pristine Bi₄V₂O₁₁ and Bi₅O₇I. Among various Bi₄V₂O₁₁/Bi₅O₇I composites with different mass ratios, the optimal composite 20BB with a Bi₄V₂O₁₁ mass fraction of 20% exhibits the highest photocatalytic activity, achieving a TC degradation efficiency of 89%. The first-order kinetic constant (2.325 × 10⁻² min⁻¹) of 20BB is 6.3 and 3.8 times higher than those of Bi₄V₂O₁₁ and Bi₅O₇I, respectively. The enhanced photocatalytic activity originates from three aspects. Firstly, the multi-electric field modulation of OVs and S-scheme charge transfer greatly accelerated the migration of photogenerated carriers. Secondly, S-scheme charge transfer mode exploited the electrons and holes with the strongest redox capability. Thirdly, OVs modification and unique 1D/3D hierarchical heterostructure improved visible-light absorption, and 1D/3D hierarchical heterostructure increased the active sites. Additionally<strong>,</strong> Bi₄V₂O₁₁/Bi₅O₇I has good stability, showing no obvious change in TC removal efficiency or crystal structure after multiple cycles. The environmental factor exerts minor impacts to the activity of Bi₄V₂O₁₁/Bi₅O₇I. H⁺, ·O₂⁻, and ·OH are the reactive species responsible for the photocatalysis process. This work offers an insight into designing high-performance composite photocatalysts by the aid of multi-field modulation strategy.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117059"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078218","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":"Design of rare-earth-free Ba3Gd2WO9:Mn4+ phosphor with excellent responsiveness to phytochrome PFR for the indoor plant cultivation","authors":"Zhengrong Xia ,&nbsp;Jing Wang ,&nbsp;Yan Xu ,&nbsp;Wang Zhao ,&nbsp;Weiwei Zhou ,&nbsp;Mingjun Song","doi":"10.1016/j.jphotochem.2026.117060","DOIUrl":"10.1016/j.jphotochem.2026.117060","url":null,"abstract":"<div><div>The development of high-performance and non-rare-earth deep-red-emitting phosphor is of great significance for indoor plant cultivation. In this research, a novel kind of double perovskite Ba₃Gd₂WO₉:Mn⁴⁺ phosphor is synthesized through high-temperature solid-state method. Its electronic band and crystal structure, as well as luminescence properties were systematically investigated. X-ray diffraction and Rietveld refinement confirmed the formation of a pure phase and successful incorporation of Mn⁴⁺ into the Ba₃Gd₂WO₉ lattice. Under NUV excitation, the emission spectra exhibited an intense far-red emission peak at 690 nm, attributed to the (Wu et al., 2019) ²E_g → ⁴A_2g transition of Mn⁴⁺. The optimal doping concentration of Mn⁴⁺ is 0.004, and the primary quenching mechanism was identified to be electric dipole-dipole interactions between Mn⁴⁺ ions. Crystal field analysis revealed that Mn⁴⁺ is located in a strong octahedral field in Ba₃Gd₂WO₉, with a <em>D</em>_q/<em>B</em> value of 2.48. Finally, far-red LED device was fabricated using Ba₃Gd₂WO₉:0.004Mn⁴⁺ phosphor, and its electroluminescent spectrum showed a large overlap with the absorption spectrum of phytochrome P_FR, indicating its potential application for indoor plant growth illumination.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117060"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081388","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":"Rb3BiBr6 single crystals featured with suppressed self-trapped excitons emission at room temperature for efficient photocatalytic H2 evolution in aqueous HBr solution","authors":"Qingkun Kong ,&nbsp;Shuhui Hu ,&nbsp;Zongxin Huang ,&nbsp;Yanhu Wang ,&nbsp;Siping Liu","doi":"10.1016/j.jphotochem.2026.117062","DOIUrl":"10.1016/j.jphotochem.2026.117062","url":null,"abstract":"<div><div>Bi-based perovskite as a new-type photocatalytic material holds promise to implement the solar-H₂ conversion, but the strong self-trapped excitons emission of Bi-based perovskite exhibit interior recombination of photo-generated carriers due to electron-phonon coupling. Herein, Rb₃BiBr₆ single crystals (SCs) which is composed of multiple pieces are synthesized, demonstrating efficient photocatalytic hydrogen evolution reaction in aqueous HBr solution, at room temperature and without the use of noble metal or metal oxide. At low temperature, Rb₃BiBr₆ SCs exhibit dual PL emission at 440 nm (free excitons) and 570 nm (self-trapped excitons), respectively. At room temperature, self-trapped excitons emission can be suppressed and Rb₃BiBr₆ SCs only show free excitons emission at 440 nm due to the reduce of electron-phonon coupling. Femtosecond transient absorption measurements reveal that Rb₃BiBr₆ SCs exhibit ultrafast hot-carrier relaxation (∼1 ps), revealing the efficient separation of electrons and holes. This work proposes a facile and versatile tactic to construct a low-cost Rb₃BiBr₆ for efficient photocatalytic hydrogen evolution reaction.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117062"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081389","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":"Clay-mediated charge management enables efficient photocatalytic hydrogen evolution in laponite/CoAl2O4/UT g-C3N4","authors":"Talha Kuru ,&nbsp;Yigit Osman Akyıldız ,&nbsp;Ali Keleş ,&nbsp;Emre Aslan ,&nbsp;İmren Hatay Patır","doi":"10.1016/j.jphotochem.2026.117065","DOIUrl":"10.1016/j.jphotochem.2026.117065","url":null,"abstract":"<div><div>Clay-supported heterojunctions were assessed using ultrathin g-C₃N₄ as the light absorber, g-C₃N₄/CoAl₂O₄ heterojunction, and a ternary Laponite/CoAl₂O₄/UT g-C₃N₄ architecture. The UT g-C₃N₄ baseline improves photon capture and carrier mobility. Adding CoAl₂O₄ forms a direct heterojunction that drives interfacial charge separation and reduces recombination. By leveraging the dual-charged nature of Laponite, the sandwich-type Laponite/CoAl₂O₄/UT g- C₃N₄ catalyst promotes the formation of internal electrostatic microfields that facilitate directional charge migration across the UT g-C₃N₄/CoAl₂O₄ heterojunction, thereby suppressing electron–hole recombination and enhancing overall catalytic activity. The combined effects of heterojunction formation, and clay-enabled charge transport account for the observed stepwise enhancement from single to binary to ternary configurations. This concise design pathway illustrates how ultrathin g-C₃N₄, spinel coupling, and a clay scaffold can be integrated into a scalable sandwich-type photocatalyst for efficient solar hydrogen evolution. Under visible-light irradiation, g-C₃N₄-NS delivered a hydrogen evolution rate of 0.12 mmol g⁻¹ h⁻¹ and an STH efficiency of 0.25%, while UT g-C₃N₄ reached 0.18 mmol g⁻¹ h⁻¹ with an STH efficiency of 0.37%. The UT g-C₃N₄/CoAl₂O₄ heterojunction achieved 0.61 mmol g⁻¹ h⁻¹ with an STH efficiency of 1.23%, and incorporation of Laponite raised the rate to 1.50 mmol g⁻¹ h⁻¹ with an STH efficiency of 3.6%. These values correspond to 2.5-fold and 12-fold improvements over the binary and pristine systems, respectively. The optimized ternary catalyst sustained a linear hydrogen evolution profile for 24 h and reached a cumulative yield of 27 mmol g⁻¹ without deactivation.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117065"},"PeriodicalIF":4.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057602","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":"A dual-mode optical thermometric strategy based on a Dy3+-activated tellurate double perovskite phosphor","authors":"Xiangyan Yun ,&nbsp;Haizhe Zhong ,&nbsp;Xueping Zang ,&nbsp;Mingjun Chen ,&nbsp;Qingqing Cheng ,&nbsp;Wei Tao ,&nbsp;Heng Li ,&nbsp;Zaifa Yang","doi":"10.1016/j.jphotochem.2026.117057","DOIUrl":"10.1016/j.jphotochem.2026.117057","url":null,"abstract":"<div><div>Developing down-conversion phosphors with stable luminescence and high temperature sensitivity is essential for non-contact optical thermometry. Herein, a Dy³⁺-activated SrGdLiTeO₆ (SGLT:Dy³⁺) phosphor was synthesized via a conventional solid-state reaction. Rietveld refinement confirms the phase-pure monoclinic double perovskite structure, revealing that Dy³⁺ ions preferentially occupy the Gd³⁺ sites. Upon near-UV excitation, the phosphor exhibits distinct blue (⁴F_9/2 → ⁶H_15/2) and yellow (⁴F_9/2 → ⁶H_13/2) emissions with tunable intensity and stable emission color as a function of dopant concentration. Notably, the anomalous enhancement of the 458 nm band with temperature enables the construction of two fluorescence intensity ratio (FIR) modes, yielding maximum relative sensitivities of 2.75% K⁻¹ and 2.87% K⁻¹, respectively. Moreover, the phosphor maintains over 70% of its room-temperature emission intensity at 500 K, indicating robust thermal stability. This work offers a practical approach for developing Dy³⁺-activated phosphors with reliable optical thermometry performance and potential applicability in non-contact temperature sensing devices.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117057"},"PeriodicalIF":4.7,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078219","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}