Journal of Rare Earths最新文献

{"title":"Low-dose X-ray induced long afterglow NIR luminescence from Cr3+ doped Zn1–xCdxGa2O4 spinel solid solutions","authors":"Tingting Zhao ,&nbsp;Wenzhi Sun ,&nbsp;Shuya Wang ,&nbsp;Wei Meng ,&nbsp;Chunqing Fu ,&nbsp;Xiaoyan Fu ,&nbsp;Hongwu Zhang","doi":"10.1016/j.jre.2023.12.006","DOIUrl":"10.1016/j.jre.2023.12.006","url":null,"abstract":"<div><div><span><span>The low-dose X-ray induced long afterglow </span>near infrared (NIR) luminescence from Cr</span>³⁺ doped Zn_{1–<em>x</em>}Cd_<em>x</em>Ga₂O₄<span> spinel solid solutions was investigated. The structure analysis shows the good formation of Zn</span>_{1–<em>x</em>}Cd_<em>x</em>Ga₂O₄<span> spinel solid solutions, which possesses a cubic spinel structure with </span><em>Fd</em>3<em>m</em> space group. The formation of Zn_{1–<em>x</em>}Cd_<em>x</em>Ga₂O₄ spinel solid solutions induces the obvious increase of long afterglow near infrared luminescence excited by low-dose X-ray. When the content of doped Cd²⁺<span> reaches 0.1, the low-dose X-ray induced long afterglow NIR luminescence is the maximum. More importantly, only 5 s X-ray irradiation can induce more than 6 h NIR afterglow emission, of which the afterglow luminescent intensity is still 5 times stronger than the background intensity after 6 h. The thermoluminescent results show that under the 5 s exposure of X-ray, the trap density of Zn</span>_0.9Cd_0.1Ga₂O₄:Cr³⁺ is much higher than that of ZnGa₂O₄:Cr³⁺. The replacement of Cd²⁺ ions with large radius at Zn²⁺ sites causes the increase of defects and dislocations, which results in the obvious increase of trap concentrations. And the addition of high-<em>z</em> number elements Cd²⁺ would enhance the X-ray absorption of the solid solutions, which thus can be easily excited by low-dose X-ray. Zn_0.9Cd_0.1Ga₂O₄:1%Cr³⁺<span> solid solution is a potential candidate of low-dose X-ray induced long afterglow luminescent materials.</span></div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 246-252"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138741594","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 novel spherical ZnIn2S4–Ag–LaFeO3 heterostructures for enhancing photocatalytic efficiency","authors":"Dongsheng Jia,&nbsp;Jiaxuan Pan,&nbsp;Dongliang Zhang,&nbsp;Mitang Wang,&nbsp;Ying Li","doi":"10.1016/j.jre.2024.02.002","DOIUrl":"10.1016/j.jre.2024.02.002","url":null,"abstract":"<div><div>Herein we report novel photocatalysts ZnIn₂S₄–Ag–LaFeO₃ with the core–shell structured materials prepared by hydrothermal method. In order to improve the efficiency of photocatalytic degradation of pollutants, LaFeO₃ was prepared by hydrothermal followed by calcination, and further Ag nanoparticle (NP) was loaded onto the spherical structure of LaFeO₃ by photolysis of silver nitrate, and finally the spherical ZnIn₂S₄–Ag–LaFeO₃ photocatalyst was prepared by hydrothermal method again. The structure and properties of the as-prepared materials were characterized by X-ray photoelectron spectroscopy, ultraviolet–visible absorption spectroscopy, X-ray diffraction, scanning electron microscopy and fluorescence spectra. The results show that the synthesized composite photocatalysts display a significant improvement in photocatalytic efficiency relative to the single LaFeO₃ and ZnIn₂S₄ and form a core–shell structure. Furthermore, the effect of the ratio of each component on the photocatalytic efficiency was investigated in detail, and it is discovered that at an Methylene Blue (MB) concentration of 0.219 mol/L, the degradation rate of MB is 95% at 120 min using 0.02 g of catalyst with an ideal ZnIn₂S₄:Ag:LaFeO₃ ratio of 10:0.5:1. The possible mechanisms to improve the photocatalytic efficiency were explored.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 295-303"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139690005","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":"Temperature sensing performance of Er3+:Yb3+ co-doped CaF2 ceramic powders using near-infrared light","authors":"Nikifor Rakov ,&nbsp;Francisco Matias ,&nbsp;Glauco S. Maciel","doi":"10.1016/j.jre.2024.01.005","DOIUrl":"10.1016/j.jre.2024.01.005","url":null,"abstract":"<div><div><span>Luminescent materials<span> for application in temperature sensing have caught a lot of interest in recent years. Particularly erbium (Er</span></span>³⁺<span><span>)-doped fluoride-based materials (EFM), which are readily accessible by near-infrared (NIR) excitation to produce efficient photon conversion. It has been established that </span>ytterbium (Yb</span>³⁺) may improve the performance of EFMs in both bulk and nanostructured forms by energy transfer channels among rare-earth ions in interstitial clusters. In this work, a comprehensive analysis of the Er³⁺:Yb³⁺:CaF₂<span> crystalline structure, photoluminescence, and energy transfer from Yb</span>³⁺ to Er³⁺<span> is presented for powders prepared by combustion synthesis. The Er</span>³⁺:Yb³⁺:CaF₂<span> powders display exceptional photon down-shift and up-conversion when exposed to NIR light (</span><em>λ</em> = 975 nm). The luminescence spectral change of the NIR emission around 1.5 μm, which corresponds to the Er³⁺ electronic transition ⁴I_13/2 → ⁴I_15/2, was investigated in a temperature range of 298–423 K for application in temperature sensing of biological systems exploring the third biological window. The luminescence intensity ratio technique was applied to the thermally coupled Stark sublevels of states ⁴I_13/2 and ⁴I_15/2 with the highest estimated temperature relative sensitivity being around 0.4 %/K at 298 K.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 253-261"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139460157","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":"Design and preparation of a sintered Nd-Y-Fe-B magnet with high magnetic properties via multi-main-phase process and subsequent grain boundary diffusion","authors":"Fugang Chen ,&nbsp;Suxin Lu ,&nbsp;Jie Wang ,&nbsp;Yong Zhao ,&nbsp;Wenqiang Zhao ,&nbsp;Zhi Xu","doi":"10.1016/j.jre.2023.11.015","DOIUrl":"10.1016/j.jre.2023.11.015","url":null,"abstract":"<div><div>A sintered Nd-Y-Fe-B magnet was designed and manufactured by the multi-main-phase process. Unevenly distributed Y in the magnet decreases the adverse magnetic weakening effect of Y on the coercivity. Grain boundary diffusion process (GBDP) was conducted to further enhance the coercivity of the Nd-Y-Fe-B magnet. The coercivity increases significantly from 884 to 1741 kA/m after GBDP with Pr₆₀Tb₁₀Cu₃₀ alloy. The mechanism of the coercivity enhancement is discussed based on the microstructure analysis. Micromagnetic simulation reveals that when the diffused Tb-rich shell thickness is lower than 12 nm the <em>c</em>-plane shell (perpendicular to the <em>c</em>-axis) is much more effective in enhancing the coercivity than the side plane shell (parallel to the <em>c</em>-axis). But when the Tb-rich shell thickness is above 12 nm the side plane shell contributes more to the coercivity enhancement. The results in this work can help to design and manufacture Nd-Fe-B magnets with low cost and high magnetic properties.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 304-311"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543590","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":"Characterization and acid leaching of rare earth elements in coal gangue using pretreatment of selective grinding, tailings discarding and alkali roasting","authors":"Xiaorui Wang ,&nbsp;Wei Cheng ,&nbsp;Ruidong Yang ,&nbsp;Jingkun Zang","doi":"10.1016/j.jre.2024.02.018","DOIUrl":"10.1016/j.jre.2024.02.018","url":null,"abstract":"<div><div>Co-associated rare earth elements (lanthanide and yttrium, REY) in coal and its by-products have been considered important potential nontraditional rare earth sources. In this study, a coal gangue sample collected from a coal processing plant in Jinsha County of Guizhou Province, southwest China, was used as the research object. The content, modes of occurrence, and extraction (acid leaching after pretreatment of selective grinding, tailings discarding, and alkali roasting) of REY from the sample were analyzed. The result shows that the content of REY (1038.26 μg/g) in pyrite and quartz is low but mainly enriched in kaolinite. Under the following conditions of a filling ratio of 40% (grinding media steel ball) and grinding time of 8 min, selective grinding pretreatment is applied to achieve 176.95 μg/g (yield 24.08%) and 1104.93 μg/g (yield 75.92%) of REY in +2 mm and −2 mm fractions, respectively. Thus, the −2 mm coal gangue fraction is selected, used as the feed, and roasted and leached with HCl. When Na₂CO₃ and NaCl are separately used as roasting activators, the REY leaching ratios are 91.41% and 68.88%, respectively, under the optimum conditions. The contents of REY in the final leachate are 1010.02 and 761.08 μg/g when Na₂CO₃ and NaCl are used, respectively. The two REY contents are relatively higher than the impurity ions in the leachate, which facilitates further REY separation. The mechanism study reveals that high-temperature roasting increases the pore size and the total pore area of the gangue, which promotes leachate penetration and improves reaction efficiency. In addition, roasting facilitates the reaction between the sodium salt activator and kaolinite and other aluminosilicate minerals in the coal gangue to generate soluble salts, thus releasing REY into the solution. The appropriate roasting temperature transforms the activator into a molten state. Thus, the reaction between coal gangue and activator is a solid–liquid reaction rather than a solid–solid reaction, which improves the efficiency of the chemical reaction.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 384-396"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140091909","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":"Recent advances of cerium compounds in functional coatings: Principle, strategies and applications","authors":"Kai An ,&nbsp;Youqiang Wang ,&nbsp;Yi Sui ,&nbsp;Yongquan Qing ,&nbsp;Wei Tong ,&nbsp;Xuezhao Wang ,&nbsp;Changsheng Liu","doi":"10.1016/j.jre.2024.03.017","DOIUrl":"10.1016/j.jre.2024.03.017","url":null,"abstract":"<div><div>Cerium (Ce) compounds have attracted considerable attention as key components in functional coatings due to their many outstanding properties. This work provides a comprehensive review of recent advances in the application of Ce in functional coatings. The role of Ce in the improvement of functional properties such as corrosion-resistance, self-healing, superhydrophobicity, wear-resistance, and UV shielding is reviewed from the perspective of functional mechanism and applied research. Furthermore, the strategies, processes, practical problems, and current challenges in the research of functional coatings containing Ce are summarized and discussed. The objective is to highlight the great potential of Ce in functional coatings, and to explore new applications of Ce in the development of novel coatings. Thus, this work aims to enhance the application value of Ce, solving the problem of unbalanced application of rare-earth elements.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 227-245"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140399976","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":"Influence of minor cerium addition on microstructure and fluidity of as-cast Al-Cu-Mn-Mg alloy","authors":"Yishan Wang ,&nbsp;Yu Bai ,&nbsp;Kaixi Jiang ,&nbsp;Wenxue Fan ,&nbsp;Puxuan Wang ,&nbsp;Hai Hao","doi":"10.1016/j.jre.2024.04.020","DOIUrl":"10.1016/j.jre.2024.04.020","url":null,"abstract":"<div><div>Al-Cu-Mn alloys are widely used to produce automobile components like cylinder heads and engine blocks because of their capability to retain excellent thermal and mechanical characteristics at high temperatures. However, the Al-Cu-Mn-based alloys demonstrate restricted fluidity, leading to casting defects such as shrinkage and incomplete filling. This research investigated the microstructure and fluidity of Al-4.7Cu-1.0Mn-0.5Mg (wt%) alloy with minor cerium (Ce) addition. The as-cast alloys predominantly comprise <em>α</em>-Al matrix, accompanied by the presence of Al₂Cu, Al₆Mn, and Al₈Cu₄Ce phases. The influence of adding Ce on the fluidity of the Al-4.7Cu-1.0Mn-0.5Mg alloy was investigated using a tri-spiral fluidity test mold in this research. The findings suggest that the addition of Ce within the range of 0.1 wt% to 0.5 wt% in the Al-4.7Cu-1.0Mn-0.5Mg alloy results in an enhancement in fluidity. Specifically, the alloy containing 0.4 wt% Ce exhibits a significant increase in fluidity distance, from 349.7 to 485.7 mm. This improvement can be attributed to the reduction in viscosity, the refinement of secondary dendrite arm spacing, and the modification of secondary phase particles. However, a higher concentration of Ce leads to a decrease in fluidity length, potentially due to the formation of Al₈Cu₄Ce.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 377-383"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140796437","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":"Alumina supported platinum-ceria catalyst for reverse water gas shift reaction","authors":"Na Jiang,&nbsp;Weiwei Wang,&nbsp;Haoxin Liu,&nbsp;Meiyao Wu,&nbsp;Chunjiang Jia","doi":"10.1016/j.jre.2024.02.015","DOIUrl":"10.1016/j.jre.2024.02.015","url":null,"abstract":"<div><div>The activation of CO₂ molecules is a fundamental step for their effective utilization. Constructing high-density oxygen vacancies on the surface of reducible oxides is pivotal for the activation of CO₂. In this work, we prepared a series of 0.5Pt<em>x</em>Ce/Al₂O₃ (<em>x</em>=1, 5, 10, or 20) catalysts with varying Ce loading and 0.5 wt% of Pt for the reverse water gas shift (RWGS) reaction. The size of CeO₂ particle increases with Ce loading. Remarkably, the 0.5Pt5Ce/Al₂O₃ catalyst with an average CeO₂ particle size of 5.5 nm exhibits a very high CO₂ conversion rate (116.4×10⁻⁵ mol_CO2/(g_cat·s)) and CO selectivity (96.1%) at 600 °C. Our experimental findings reveal that the small-size CeO₂ in 0.5Pt5Ce/Al₂O₃ possesses a greater capacity to generate reactive oxygen vacancies, promoting the adsorption and activation of CO₂. In addition, the oxygen vacancies are cyclically generated and consumed during the reaction, which contributes to the elevated catalytic performance of the catalyst. This work provides a general strategy to construct rich oxygen vacancies on CeO₂ for designing high-performance catalysts in C₁ chemistry.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 284-294"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140046232","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":"Comprehensive recovery of rare earth elements and gypsum from phosphogypsum: A wastewater free process combining gravity separation and hydrometallurgy","authors":"Jialin Qing ,&nbsp;Dapeng Zhao ,&nbsp;Li Zeng ,&nbsp;Guiqing Zhang ,&nbsp;Liang Zhou ,&nbsp;Jiawei Du ,&nbsp;Qinggang Li ,&nbsp;Zuoying Cao ,&nbsp;Shengxi Wu","doi":"10.1016/j.jre.2024.01.013","DOIUrl":"10.1016/j.jre.2024.01.013","url":null,"abstract":"<div><div>Comprehensive utilization of phosphogypsum (PG) has attracted much attention, especially for the recovery of rare earth elements (REEs) and gypsum due to the issues of stockpile, environmental pollution, and waste of associated resources. Traditional utilization methods suffered the issues of low REEs leaching efficiency, huge amount of CaSO₄ saturated wastewater and high recovery cost. To solve these issues, this study investigated the occurrence of REEs in PG and the leaching of REEs. The results show that REEs in PG are in the forms of (1) REEs mineral inclusions, (2) REEs isomorphous substitution of Ca²⁺ in gypsum lattice, (3) dispersed soluble REEs salts. Acid leaching results demonstrate that (1) the dissolution of gypsum matrix is the control factor of REEs leaching; (2) H₂SO₄ is a promising leachant considering the recycle of leachate; (3) the gypsum matrix suffers a recrystallization during the acid leaching and releases the soluble REEs from PG to aqueous solution. For the recovery of the undissolved REEs mineral inclusions, wet sieving concentrated 37.1 wt% of the REEs in a 10.7 wt% mass, increasing REEs content from 309 to 1071 ppm. Finally, a green process combining gravity separation and hydrometallurgy is proposed. This process owns the merits of wastewater free, considerable REEs recovery (about 10% increase compared with traditional processes), excellent gypsum purification (&gt;95 wt% CaSO₄·2H₂O, with &lt;0.06 wt% of soluble P₂O₅ and &lt;0.015 wt% of soluble F) and reagent saving (about 2/3 less reagent consumption than non-cyclical leaching).</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 362-370"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139667562","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":"La3+ substitution-adjusted magnetic and optical properties with enhanced photocatalytic activity and stability of copper zinc nickel ferrites for wastewater treatment applications","authors":"N.S. Al-Bassami","doi":"10.1016/j.jre.2024.03.007","DOIUrl":"10.1016/j.jre.2024.03.007","url":null,"abstract":"<div><div>Copper-zinc-nickel (Cu–Zn–Ni) ferrite nanoparticles are used for wastewater treatment technology. However, low degradation efficiency and stability are two main issues that make them unsuitable for actual production needs. In this paper, the citrate-nitrate auto-combustion method was applied for the formation of Cu_0.5Zn_0.25Ni_0.25La_<em>x</em>Fe_{2–<em>x</em>}O₄; (0≤<em>x</em>≤0.1; step 0.02) (CZNL) nanoferrites. Although the substitution process entails the replacement of a small ion with a larger one, the lattice constant and crystallite size does not exhibit a consistent incremental pattern. This behavior is justified and discussed. The size of all the CZNL ferrite nanoparticles is in the range of 8–12 nm, and the lattice constant is in the range of 8.6230 to 8.4865 nm. The morphological analysis conducted using field emission-scanning electron microscopy (FE-SEM) reveals that the CZNL exhibits agglomerated spherical morphology. The energy dispersive X-ray spectrameter (EDAX) analysis was employed to confirm the elemental composition of CZNL nanoferrites. Since the process entails the substitution of Fe³⁺ magnetic ions with non-magnetic ions La³⁺, the magnetic parameters of CZNL nanoferrites show a general decreasing trend as predicted. At 20 K, saturation magnetization <em>M</em>_s shows an overall drop in its values from 59.302 emu/g at <em>x</em> = 0.0–41.295 emu/g at <em>x</em> = 0.1, the smallest value of 37.87 emu/g is recorded at <em>x</em> = 0.06. the highest coercivity (<em>H</em>_c = 125.9 Oe) and remanence (<em>M</em>_r = 13.32 emu/g) are recorded for <em>x</em> = 0.08 and <em>x</em> = 0.04 nanoferrite, respectvely. The band gap of all the CZNL nanoferrites was determined using the Kubelka–Munk function and Tauc plot for direct permitted transitions. La doping modifies the band gap (within 1.86–1.75 eV), increases light absorption, induces efficient e/h separation and charge migration to Cu_0.5Zn_0.25Ni_0.25La_<em>x</em>Fe_{2–<em>x</em>}O₄ surfaces. The nanoferrite Cu_0.5Zn_0.25Ni_0.25La_0.06Fe_1.94O₄ achieves a degradation efficiency of 97.3% for methylene blue (MB) dye removal after just 60 min. After five recycling processes, the nanocatalyst Cu_0.5Zn_0.25Ni_0.25La_0.06Fe_1.94O₄ is degraded by 95.83%, resulting in a negligible 1.51% decrease in photocatalytic activity efficiency. The new Cu_0.5Zn_0.25Ni_0.25La_0.06Fe_1.94O₄ has exceptional photocatalytic activity and remarkable stability, making it a promising candidate for applications in wastewater treatment.</div></div>","PeriodicalId":16940,"journal":{"name":"Journal of Rare Earths","volume":"43 2","pages":"Pages 319-328"},"PeriodicalIF":5.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140125030","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}