Rongbo Suo , Linjun Xie , Ziying Hu , Shanrui Wang , Jing Chen , Can-Zhong Lu
{"title":"A Z-scheme heterojunction constructed by ZnO/CeVO4 for highly active photocatalytic hydrogen production","authors":"Rongbo Suo , Linjun Xie , Ziying Hu , Shanrui Wang , Jing Chen , Can-Zhong Lu","doi":"10.1016/j.jre.2024.08.014","DOIUrl":"10.1016/j.jre.2024.08.014","url":null,"abstract":"<div><div>Photocatalytic hydrogen production is one of the most promising ways to obtain sustainable hydrogen energy. However, it is constrained by low energy conversion efficiency, which is due to the fast recombination of photogenerated electrons and holes, the low utilization rate of the visible light of the solar spectrum, and the severe photo corrosion of semiconductor photocatalyst. The construction of semiconductor heterojunction is not only beneficial to the separation of photogenerated carriers in photocatalysts, but also effective to broaden the range of light harvest by introducing narrow bandgap semiconductors. In this paper, a heterojunction photocatalyst ZnO/CeVO<sub>4</sub> was obtained by simple mild physical method. The Z-scheme heterostructure of ZnO/CeVO<sub>4</sub> is conducive to the strong electron interaction, the enlarged light trapping range, the promoted separation and migration of photo carriers, and the high redox properties. Compared with the pure ZnO and CeVO<sub>4</sub> catalysts, the photocatalytic efficiency of ZnO/CeVO<sub>4</sub> is higher, and the optimal hydrogen production rate reaches 1289 μmol/(g·h). This work affords a simple mild method to construct a Z-scheme CeVO<sub>4</sub> based photocatalysts, which show high active photocatalytic H<sub>2</sub> production performance.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 9","pages":"Pages 1859-1869"},"PeriodicalIF":7.2,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jianfen Huang , Tao Chen , Wugui Jiang , Longhui Mao , Zhiyong Chen
{"title":"Twinning behavior of an extruded Mg-Gd-Y-Zn-Zr alloy sheet under tension and compression","authors":"Jianfen Huang , Tao Chen , Wugui Jiang , Longhui Mao , Zhiyong Chen","doi":"10.1016/j.jre.2024.08.020","DOIUrl":"10.1016/j.jre.2024.08.020","url":null,"abstract":"<div><div>In this study, twinning behaviors of an extruded Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr (wt%) alloy sheet along different directions extrusion direction (ED), 45°: 45° to ED and transverse direction (TD) under tension and compression were investigated. The results show that: (i) the twinning frequency of the extruded alloy sheet along different directions shows obvious anisotropy under both tension and compression while demonstrating opposite orders of ED > 45° > TD under tension and TD > 45° > ED under compression. Such anisotropic twinning frequencies are both in accord with their average twinning Schmid factor (TSF) orders. (ii) Under both tension and compression, the twinning variants (TVs) with the highest and the second highest TSF are frequently selected with priority. However, the TV selection law under tension has a certain difference from that of compression, which should be related to the TSF distributions of ortho-TV, meta-TV and para-TV under tension and compression.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"42 12","pages":"Pages 2208-2216"},"PeriodicalIF":5.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sensitive fluorescence detection of baicalin in biological samples using Eu3+-based metal–organic frameworks","authors":"Hao Zhang, Yutong Chen, Runnan Wang, Fanxu Meng, Dawei Lou","doi":"10.1016/j.jre.2024.08.016","DOIUrl":"10.1016/j.jre.2024.08.016","url":null,"abstract":"<div><div>Baicalin, a major flavonoid compound found in <em>Scutellariae radix</em>, is the first SARS-CoV-2 3CLpro virus inhibitor. Therefore, developing an accurate and reliable strategy to detect baicalin in biological systems is vital. Herein, we report the first indolyl-lanthanide metal–organic framework (MOF) materials and their application as baicalin sensors. The results of this study indicate that the new crystal structure has good stability and luminous performance. The detection limits of baicalin in serum and urine are 0.05 and 0.04 μmol/L, respectively, suggesting high sensitivity and selectivity. Various background substances present in practical samples, such as anions, cations, and amino acids, do not interfere with the photoluminescence analytical signal of Eu<sup>3+</sup>. We identified that the quenching of the Eu-MOF is due to the inner filter effect, absorption energy competition, and photoinduced electron transfer among the baicalin, ligand, and MOF through powder X-ray diffraction analysis, Fourier transform infrared spectroscopy, luminescence lifetimes, ultraviolet studies, and computational analysis. Thus, we designed a convenient, sensitive, and facile detection method using the Eu-MOF and demonstrate that Eu<sup>3+</sup>-based materials are promising sensors for baicalin detection in actual serum and urine. Additionally, the prepared Eu-MOF@polyvinyl alcohol composite matrix membrane test film has considerable practical application value for the portable detection of baicalin.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 8","pages":"Pages 1703-1710"},"PeriodicalIF":5.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lei Li , Yanjie Liang , Jie Li , Jingling Shao , Jianjian Zhu , Dong Wang
{"title":"Surface regulation of perovskite LaPd0.1Mn0.9O3 for improved toluene oxidation activity","authors":"Lei Li , Yanjie Liang , Jie Li , Jingling Shao , Jianjian Zhu , Dong Wang","doi":"10.1016/j.jre.2024.09.008","DOIUrl":"10.1016/j.jre.2024.09.008","url":null,"abstract":"<div><div>Surface regulation is a crucial technique for improving catalytic performance in heterogeneous catalysis. Although perovskite oxides containing noble metals show good performance and excellent thermal stability, the encapsulation of noble metals in perovskite lattice restricts the exposure/usage of active sites. Herein, a method of high-temperature calcination coupling with selective dissolution was adopted to tune the physicochemical environment on the LaPd<sub>0.1</sub>Mn<sub>0.9</sub>O<sub>3</sub> catalyst surface. The X-ray diffraction (XRD) and Raman results reveal that more Pd species emerge on the surface by elevating the calcination temperature, resulting in improved catalytic toluene oxidation activity. A further acid-etching of the LPMO-900 catalyst can also boost catalytic performance, being attributed to the enhanced redox ability and abundant surface oxygen vacancies. In addition, the optimized catalyst also exhibits excellent resistance to sintering and water vapor. This study provides new avenues for the rational design of highly efficient perovskite-based catalysts.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 3","pages":"Pages 534-542"},"PeriodicalIF":5.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Occurrence state, occupying sites and coordination structure of rare earth elements in phosphorite","authors":"Jun Xie , Chao Wang , Qin Zhang , Fanfei Min","doi":"10.1016/j.jre.2024.09.004","DOIUrl":"10.1016/j.jre.2024.09.004","url":null,"abstract":"<div><div><span>Rare earth elements<span> (REEs) are associated with phosphorite<span>, which is an important strategic reserve resource. During sorting process of phosphorite, REEs may move with specific host minerals, however, occurrence state and moving pattern of REEs from rock to products are still unclear, which limits separation and enrichment of REEs from phosphorite. Mappings of scanning electron microscope (SEM) and electron probe X-ray micro-analyzer (EPMA) of REEs are highly consistent with those of calcium and phosphorus, and complementary with that of magnesium, which indicates that </span></span></span>fluorapatite (Fap) is the main host mineral of REEs. The results of flotation and leaching experiments further indicate that REEs are enriched along with Fap from phosphorite to products. Occupied sites and occupation number of REEs were obtained by X-ray diffraction (XRD) refinement based on the Rietveld method. La, Ce, Nd, and Y can occupy both Ca1 and Ca2 sites. The ratios of La, Ce, Nd, and Y at Ca2 and Ca1 sites are 4.20, 3.70, 3.00, and 1.33, showing a decreasing trend, indicating that La, Ce, and Nd tend to occupy Ca2 sites, while Y tends to occupy Ca1 sites. X-ray absorption fine structure (XAFS) shows that REEs mainly form coordinate structures with oxygen and fluorine, which is a direct evidence that REEs replace calcium(II) in phosphorite in an isomorphism form. Coordination structure and polyhedral configuration analysis indicate that substitution degree of La, Ce, Nd, and Y is Y > La > Ce ≈ Nd from easy to difficult at Ca1 and Ca2 sites. The research enriches the mineralization theory of REEs-bearing phosphorite and provides certain theoretical guidance for selective enrichment of REEs from phosphorite.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 9","pages":"Pages 2016-2028"},"PeriodicalIF":7.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Construction of ternary structured Dy2O3 nanorods/carbon spheres/few layered Dy2WO6 nanohybrids for electrochemical supercapacitors","authors":"Sethumathavan Vadivel, P. Sujita","doi":"10.1016/j.jre.2024.09.005","DOIUrl":"10.1016/j.jre.2024.09.005","url":null,"abstract":"<div><div>In this work, Dy<sub>2</sub>O<sub>3</sub> rods and layered Dy<sub>2</sub>WO<sub>6</sub> heterostructure were effectively interconnected by carbon spheres named Dy<sub>2</sub>O<sub>3</sub>/Dy<sub>2</sub>WO<sub>6</sub>/C-sph nanocomposite with a confined interface and it was fabricated using a simple solvothermal approach. These ternary nanocomposites were investigated by X-ray diffraction (XRD), UV–visible diffuse-reflectance spectroscopy (UV-DRS), Fourier transform-infrared spectroscopy (FT-IR), Raman, field emission scanning electron microscopy (FESEM) with energy disperse spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS) analyses systematically. The XRD data expose that the synthesized materials are formed with a virtuous crystalline state. The charge storage properties and electrochemical performances of the as-synthesized nanocomposites and pure components were assessed with the help of cyclic voltammogram (CV), galvanostatic charge–discharge studies (GCD), and electrochemical impedance studies (EIS), respectively. The rare-earth-based novel Dy<sub>2</sub>O<sub>3</sub>/Dy<sub>2</sub>WO<sub>6</sub>/C-sph nanocomposite as working electrodes established commendable electrochemical performances with a maximum specific capacitance value of 123 F/g at a current density of 0.4 A/g in 2.0 mol/L aqueous KOH solution. According to the stability measurements, it was observed that the initial capacitance was maintained at ∼93% even after 2500 cycles, indicating that good electrochemical stability with the lowest internal resistance values was obtained from EIS analysis. The electrochemical measurements suggest that the Dy<sub>2</sub>O<sub>3</sub>/Dy<sub>2</sub>WO<sub>6</sub>/C-sph nanocomposite enables great competence and can be used as alternative electrode material in supercapacitor devices to avail high energy efficiency in a sustainable approach.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2222-2230"},"PeriodicalIF":7.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kefu Chao , Ze Wang , Chengxue Deng , Yu Zhang , Kai Li , Xuelian Zhou , Kaixuan Wang , Sur Lig , Hala Muji , Qixu Tian , B. Narsu , Yu Wang
{"title":"Improvement in mechanoluminescence performance and implementation of dual-mode photoluminescence based on Bi3+ ion non-intrinsic defect control strategy","authors":"Kefu Chao , Ze Wang , Chengxue Deng , Yu Zhang , Kai Li , Xuelian Zhou , Kaixuan Wang , Sur Lig , Hala Muji , Qixu Tian , B. Narsu , Yu Wang","doi":"10.1016/j.jre.2024.09.006","DOIUrl":"10.1016/j.jre.2024.09.006","url":null,"abstract":"<div><div>The gallate salts are frequently employed as matrix for mechanoluminescence (ML) materials largely due to their plentiful defect energy levels and robust piezoelectric characteristics. Nevertheless, the ML performance of specific gallate materials is inferior to that of sulfides and fluorides and thus requires improvement. To address this issue, it is essential to engineer appropriate lattice defects in order to facilitate the advancement of new elastic ML materials. Therefore, in the present study, a series of Ca<sub>3</sub>Ga<sub>4</sub>O<sub>9</sub>:0.01Bi<sup>3+</sup>,<em>x</em>Tb<sup>3+</sup> (<em>x</em> = 0.01, 0.02, 0.03, 0.04, 0.05 and 0.06) was synthesized using the traditional high-temperature solid-state method. Furthermore, a non-intrinsic defect control strategy utilising Bi<sup>3+</sup> ions is presented, which serves to enhance the performance of calcium gallate. The ML intensity is enhanced by 112% in comparison to the undoped samples (concentration of Tb<sup>3+</sup> is 0.04), resulting in an improved linearity between mechanical loading and ML intensity, along with the achievement of dual-mode photoluminescence (PL). By analysing the crystal structure, PL, ML, and thermoluminescence (TL) properties of Ca<sub>3</sub>Ga<sub>4</sub>O<sub>9</sub>:Bi<sup>3+</sup>,Tb<sup>3+</sup> (CGO:Bi<sup>3+</sup>,Tb<sup>3+</sup>), coupled with the first principles calculations using density functional theory (DFT), the ML mechanism of CGO:Bi<sup>3+</sup>,Tb<sup>3+</sup> was elucidated. This leads to the development of a versatile anti-counterfeiting device with both flexible and rigid multi-mode capabilities.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2128-2136"},"PeriodicalIF":7.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arpita Paul Chowdhury , Sampath Chinnam , K.S. Anantharaju , B. Sharath Kumar , K. Keshavamurthy , K. Gurushantha
{"title":"Gd3+ doped CoFe2O4 coupled with bismuth oxybromide for visible-light-driven removal of organic contaminants: Reactive Red 120 and Acid Violet 7 and its mechanism insights","authors":"Arpita Paul Chowdhury , Sampath Chinnam , K.S. Anantharaju , B. Sharath Kumar , K. Keshavamurthy , K. Gurushantha","doi":"10.1016/j.jre.2024.09.007","DOIUrl":"10.1016/j.jre.2024.09.007","url":null,"abstract":"<div><div>In the current study novel magnetic BiOBr-Gd<sup>3+</sup> doped CoFe<sub>2</sub>O<sub>4</sub> heterojunction nanocomposites fabricated by chemical precipitation method for Acid Violet 7 (AV 7) and Reactive Red 120 (RR 120) dye degradation under sunlight are presented. The samples were well characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), UV–visible near infrared (NIR), photoluminescence (PL), TRF, EIS, Mott–Schottky, and BET analysis. X-ray diffractograms of BiOBr-Gd<sup>3+</sup> doped CoFe<sub>2</sub>O<sub>4</sub> nanocomposites authenticate the formation of the composite composed of diffraction peaks of both BiOBr and Gd<sup>3+</sup> doped CoFe<sub>2</sub>O<sub>4</sub> samples. Photoluminescence (PL), Time Resolved Fluorescence Spectrocopy (TRF) and Electrochemical Impedance Spectroscopy (EIS) investigations were explored to examine the transfer efficiency of photoinduced charge carriers. Among the synthesized materials, the BiOBr-Gd<sup>3+</sup> doped CoFe<sub>2</sub>O<sub>4</sub>-2 nanocomposite presents superior degradation capability for RR 120 of 87.34% and AV 7 dyes of 98.41%. The apparent rate constant (<em>k</em>) value of 0.1317 min<sup>−1</sup> for AV 7 is sixteen times higher and RR 120 (0.0135 min<sup>−1</sup>) is 2 times higher than pristine BiOBr. The radical trapping experiments also proved the role of photogenerated h<sup>+</sup>, O<sub>2</sub><sup>·−</sup>, and <sup>·</sup>OH radicals in the degradation mechanism. The superior performance of BiOBr-Gd<sup>3+</sup> doped CoFe<sub>2</sub>O<sub>4</sub>-2 is ascribed to the formation of the heterostructure, the in-built electric field, and energy-band alignment, which thermodynamically and kinetically favors the photoactivity and stability of the heterojunction.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2166-2176"},"PeriodicalIF":7.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rui Shi , Yan'an Li , Jiutao Gao , Ziyang Chen , Xin Zhang , Shanlin Zhang , Zaheer Ud Din Babar , Chengxin Li
{"title":"Design and conductivity optimization of La0.3Sr0.7TiO3/La0.8Sr0.2MnO3 bi-layer structures as tubular segmented-in-series solid oxide fuel cell interconnect","authors":"Rui Shi , Yan'an Li , Jiutao Gao , Ziyang Chen , Xin Zhang , Shanlin Zhang , Zaheer Ud Din Babar , Chengxin Li","doi":"10.1016/j.jre.2024.09.003","DOIUrl":"10.1016/j.jre.2024.09.003","url":null,"abstract":"<div><div>This study focused on meeting the stringent stability requirements of tubular segmented-in-series solid oxide<span><span><span><span> fuel cells (SOFCs) in reducing and oxidizing atmospheres. To address this challenge, a bi-layer perovskite<span> ceramic interconnect was designed by controlling the oxygen partial pressure, because of the strong correlation between the conductivity of strontium-doped </span></span>lanthanum<span> titanate (LST) and the oxygen partial pressure. The </span></span>LST<span><span> powder was prepared using solid-phase and sol–gel methods, and their influence on particle size and sintering behavior was compared. LST/lanthanum </span>strontium </span></span>manganite<span> (LSM) bi-layer ceramic interconnects with varying thicknesses were fabricated through screen printing and co-sintering. The results demonstrate favorable interfacial bonding and excellent chemical compatibility between the ceramic layers. The conductivity of the bi-layer interconnect exhibits a temperature-dependent behavior, peaking at 550 °C. Simulation calculations and research findings validate that the conductivity of the bi-layer interconnect is determined by the thickness of the LSM layer and the oxygen partial pressure at the interconnect interface. Optimal conductivity is achieved with a bi-layer interconnect consisting of approximately 15 μm of LST and 4 μm of LSM. This can be attributed to the efficient regulation of oxygen partial pressure at the interface, effectively mitigating LSM decomposition caused by low oxygen partial pressure and the subsequent reduction in conductivity. These results provide valuable fundamental data and methodology for the development of high-performance interconnects for tubular segmented-in-series SOFCs.</span></span></div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 9","pages":"Pages 1920-1928"},"PeriodicalIF":7.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xingyang Peng , Ruirui Cui , Xiang Guo , Xingyong Gong , Jun Zhang , Chaoyong Deng
{"title":"Er3+ activated BaLaGaO4 multifunctional green phosphors for optical thermometers and WLEDs","authors":"Xingyang Peng , Ruirui Cui , Xiang Guo , Xingyong Gong , Jun Zhang , Chaoyong Deng","doi":"10.1016/j.jre.2024.09.001","DOIUrl":"10.1016/j.jre.2024.09.001","url":null,"abstract":"<div><div>Er<sup>3+</sup>-doped BaLaGaO<sub>4</sub> green phosphors was synthesized through a high-temperature solid-state reaction technique. The phase structure and morphology test results of the phosphor indicate that the BaLaGaO<sub>4</sub> material was successfully synthesized and Er<sup>3+</sup> ions were successfully doped into the main lattice. This doping does change the basic structure of the crystal. BaLaGaO<sub>4</sub>:Er<sup>3+</sup> phosphor exhibits bright green emission centered at 545 nm when excited by 381 nm ultraviolet light or 980 nm near-infrared light. The optimal doping concentration is found to be <em>x</em> = 0.04. To quantify the temperature sensitivity of the phosphor, the fluorescence intensity ratio method was used. Within the temperature range of 298–473 K, the maximum relative sensitivities are 1.35%/K (298 K, 381 nm) and 1.45%/K (298 K, 980 nm), respectively. The maximum absolute sensitivities are 0.67%/K (473 K, 381 nm) and 0.69%/K (473 K, 980 nm), respectively. Finally, white light-emitting diodes (WLEDs) with a high colour index of <em>Ra</em> = 82 and a relatively low correlated colour temperature of CCT = 5064 K are obtained by integrating the synthesized BaLaGaO<sub>4</sub>:0.04Er<sup>3+</sup> green phosphor into warm WLEDs devices. These results suggest that Er<sup>3+</sup>-activated BaLaGaO<sub>4</sub> multifunctional phosphors hold considerable promise in the areas of optical temperature sensing and WLEDs phosphor conversion.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 10","pages":"Pages 2077-2089"},"PeriodicalIF":7.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}