Article
Materials Science, Multidisciplinary
Rangwei Meng, Zhiyuan He, Xuanhui Luo, Chi Zhang, Mengwei Chen, Halfei Lu, Yingping Yang
Summary: Rare earth nanoparticles were prepared and introduced into solar cells to enhance the power conversion efficiency significantly. This approach broadens the response range of the cells, leading to improved performance.
Article
Materials Science, Multidisciplinary
Navadeep Shrivastava, Carlos Ospina, Carlos Jacinto, Alan S. de Menezes, Diego Muraca, Yasir Javed, Marcelo Knobel, Zhiping Luo, Surender Kumar Sharma
Summary: A robust yellowish-green emitting multi core-shell Fe3O4@SiO2@beta-NaGdF4:RE3+ (RE=5% Ce, 5% Tb, x% Dy; x=1, 5 and 10 mol.%) nanoparticles (NPs) containing magnetic and luminescence properties were synthesized using a microwave-assisted hydrothermal method. The photoluminescence investigation revealed a down-converting energy transfer process involving Ce3+->Gd3+->Tb3+<->Dy3+ with Gd3+ playing an important intermediate role assisted by Tb3+. The magnetic hysteresis loops displayed superparamagnetic behavior at 300 K and ferromagnetic ordering at 2 K.
Article
Environmental Sciences
P. Velusamy, Xinghui Liu, M. Sathiya, Norah Salem Alsaiari, Fatimah Mohammed Alzahrani, M. Tariq Nazir, Elangovan Elamurugu, M. Senthil Pandian, Fuchun Zhang
Summary: A two-step thermal polymerization and solvothermal approach was used to construct nano heterostructures of FCN and BiOI, both of which are Nobel metal-free materials. The effect of the nano-heterostructure on the microstructural, light absorption capability, PEC properties, and pollutant degradation efficiency of the synthesized heterostructures was investigated. The FCN/BiOI nano-heterostructure showed enhanced solar light absorption, higher photocurrent density, and superior dye degradation efficiency compared to other structures.
Article
Chemistry, Physical
Yuli Kou, Kangkang Wang, Mailidan Wumaer, Changyan Guo, Bingren Tian, Li Zhang, Naeem Akram, Jide Wang
Summary: A novel hollow core-shell Cu@Cu3 xP catalyst with copper vacancies was synthesized by the vapor deposition method, showing excellent photocatalytic and catalytic reduction properties for organic pollutants. The synergistic effect of Cu vacancy, Cu nanowire, and the unique hollow core-shell structure contributes to the superior catalytic performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Dong-Eun Lee, Vidyasagar Devthade, Satyanarayana Moru, Wan-Kuen Jo, Surendar Tonda
Summary: This study demonstrates the efficacy of a magnetically sensitive TiO2 hollow sphere/Fe3O4 core-shell hybrid catalyst for the sunlight-assisted degradation of aqueous antibiotic pollutants. The hybrid catalyst exhibited significantly higher activity than the pure TiO2 hollow sphere catalyst and showed strong optical response properties and charge separation capabilities. The catalyst can be magnetically recovered and reused without significant loss in its activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Jianle Xu, Qing Yao, Pengwei Li, Xiao Zhang, Shuang Wang, Chunxu Pan
Summary: In this study, a core-shell hetero-structured α-Fe2O3@C composite was successfully synthesized and its photocatalytic mechanism was investigated. The core-shell structure provides more heterogeneous interfaces and synergistic effects, resulting in enhanced light absorption and electronic transfer capacity. It is anticipated that this material can be applied in hydrogen generation, green energy, water splitting, and other fields.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Environmental
Yu-Xuan Li, Chong-Chen Wang, Huifen Fu, Peng Wang
Summary: The TiO2/MIL-125 core-shell composites were successfully prepared and exhibited superior photocatalytic performance, with the optimal MT-2 showing excellent activity in Cr(VI) reduction. Additionally, the formation of TiO2 nanosheets improved the separation efficiency of photo-induced carriers.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Tijana Stamenkovic, Dejan Pjevic, Jugoslav Krstic, Maja Popovic, Vladimir Rajic, Vesna Lojpur
Summary: A series of SrGd2O4 samples doped with different concentrations of Sm3+ and Dy3+ were prepared through glycine-assisted combustion synthesis. X-ray Powder Diffraction investigation confirmed the presence of pure orthorhombic lattice SrGd2O4. Energy Dispersive X-ray Spectroscopy showed that the desired elements were incorporated in the structure. Field Emission Scanning Electron Microscopy revealed the morphology of the samples as porous aggregated particles consisting of approximately 50 nm-sized spherical particles. Mercury Intrusion Porosimetry demonstrated the presence of a real permanent 3D pore structure. X-ray Photoelectron Spectroscopy confirmed the successful incorporation of Dy3+ and Sm3+ ions. Down-conversion luminescence spectra showed typical emission transitions for Sm3+ and Dy3+ ions. The energy band gap of the doped samples was calculated to be 4.3 eV using UV-VIS Diffuse Reflectance Spectroscopy. UV-VIS Absorption Spectroscopy observed the photocatalytic degradation process, with approximately 50% of Rhodamine B being mineralized after 4 hours of simulated Sun exposure.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Yan Xiao, Hao Wang, Yinhua Jiang, Wenli Zhang, Jianming Zhang, Xiangyang Wu, Zhanchao Liu, Wei Deng
Summary: In this work, a novel hierarchical 1D/2D core/shell Sb2S3-ZnIn2S4 heterostructure with highly efficient photocatalytic activities for both hydrogen production from water and organic pollutant degradation was designed and fabricated. The heterostructure showed improved light absorption capacity, increased surface area, shortened distance of electronic transmission channels, and accelerated separation and migration of photogenerated carriers. The SB-ZIS composites displayed significantly enhanced photocatalytic performances for H2 generation and Tetracycline Hydrochloride (TCH) photodegradation. The research provides useful information for the development of Sb2S3-based core-shell heterostructures with efficient photocatalytic activity for solving environmental pollution and producing clean hydrogen energy.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
He Ren, Jing-Liang Yang, Wei-Min Yang, Han-Liang Zhong, Jia-Sheng Lin, Petar M. Radjenovic, Lan Sun, Hua Zhang, Juan Xu, Zhong-Qun Tian, Jian-Feng Li
Summary: This study focuses on the development of core-shell plasmonic photocatalysts based on CdS, aiming to improve energy conversion efficiency through hot electron injection and plasmonic coupling effects. The plasmonic nanocomposite photocatalyst showed a significant enhancement in catalytic performance, surpassing traditional CdS by more than 200 times. This work provides valuable insights into the mechanisms of SPR enhanced photocatalysis and offers an effective strategy for designing plasmonic photocatalysts.
ACS MATERIALS LETTERS
(2021)
Article
Environmental Sciences
Haojia Ding, Linping Bao, Yao Su, Yuqin Li, Guodong Xu, Chunhui Dai, Chao Zeng
Summary: A core-shell structured Ag2S-AgIO3 Z-scheme heterostructure photocatalyst has been designed and developed, extending the UV absorption of AgIO3 to the Vis-NIR region and enhancing the photocatalytic activity. The composite catalyst shows effective MO degradation under natural sunlight.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Mei-Hua Chen, Qian-Ying Lu, Yi-Ming Li, Ming-Ming Chu, Xue-Bo Cao
Summary: In this study, ZnO@ZIF-8 core-shell heterostructures were successfully synthesized, with ZIF-8 shell effectively increasing the specific surface area of ZnO nanorods. The synergistic effect between ZnO and ZIF-8 resulted in high photocatalytic activity, leading to rapid degradation of methylene blue under solar light irradiation. Additionally, the stability experiments demonstrated that the prepared ZnO@ZIF-8 nanocomposites retained over 95% of their photocatalytic activity after four cycles.
Article
Chemistry, Multidisciplinary
Abdisa Habtamu, Masaki Ujihara
Summary: Environmental pollution is a global concern, and solar energy-driven photocatalysis shows promise for pollutant decomposition in water systems. This study analyzed the efficiency and mechanism of WO3-loaded TiO2 nanocomposites with different structures. The nanocomposites were synthesized using sol-gel reactions and core-shell approaches, and their photocatalytic activity was analyzed for the degradation of methylene blue and methyl orange. The results showed that adjusting the nanocomposite structure could control the photoreaction mechanisms. These findings have implications for the design of photocatalysts for environmental remediation.
Article
Chemistry, Physical
Shuanglong Ye, Lei Lei
Summary: This study successfully prepared lanthanide-doped cubic NaYF4 core and core/shell nanocrystals and found that the thickness of the shell can be adjusted by changing the reaction temperature. The cubic NaYF4: 20Yb2Er@NaYF4 core/shell nanocrystals exhibited excellent temperature sensing performance.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Tijana Stamenkovic, Ivana Dinic, Marina Vukovic, Nadezda Radmilovic, Tanja Barudzija, Milos Tomic, Lidija Mancic, Vesna Lojpur
Summary: In this study, strontium-gadolinium-oxide (SrGd2O4) samples doped with different Yb3+ concentrations and co-doped with Bi3+ were prepared. The inclusion of Bi3+ improved the photoluminescent properties, but decreased the photocatalytic efficiency of the samples.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)