Laser & Photonics Reviews
·
2023
·Vol. 17
·期 10
·2300158
·
IF 11
Gangyi Zhang,Deyin Wang,Jiejun Ren,Xiaopeng Zhou,Yuhua Wang
Luminescent metal halides have attracted increasing attention because of their tunable emission and superior photoelectric properties. However, it is still challenging to achieve near-infrared (NIR) emission from metal halides, which is important in applications such as food quality analysis and night vision. In this work, the broadband NIR emission is achieved by alloying Sn 2+ into zero-dimensional (0D) Cs 2 ZnBr 4 . The incorporating of Sn 2+ cations enables the originally weakly luminescent Cs 2 ZnBr 4 to exhibit an efficient broadband NIR emission. Upon photoexication, the optimized Sn 2+ alloyed Cs 2 ZnBr 4 (Cs 2 Zn 0.875 Sn 0.125 Br 4 ) exhibits a highly efficient broadband NIR emission peaked around 700 nm, with a large Stokes shift of 323 nm, a full width at maximum of 177 nm, and a high quantum efficiency of around 41%. Spectroscopic and theoretical calculations unveil that the efficient NIR emission originates from the self-trapping emission introduced by the Sn alloying. In addition to the high efficient broadband emission, the Sn 2+ alloyed Cs 2 ZnBr 4 also exhibits high thermal stability, retaining 78% of its initial intensity at 150 °C. The night vision application is demonstrated by using a light source fabricated by combining Sn 2+ alloyed Cs 2 ZnBr 4 phosphor with a 365 nm LED chip in the dark.
研究领域:
材料科学
·
光电子学
·
无机化学
·
固态物理
·
光学材料
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 15
·6003-6009
·
IF 3.288
Yuhang Jiang,Qiuwan Shen,Shian Li,Guogang Yang,Naibao Huang
B-site cobalt-doped perovskite oxide BaNiO3 oxygen sorbents have been synthesized by an EDTA sol–gel method and further applied for producing oxygen. BaCoxNi1−xO3−δ oxygen sorbents were characterized by scanning electron microscopy (SEM) and cyclic oxygen adsorption/desorption experiments. Results showed that BaCo0.6Ni0.4O3−δ features higher production amounts of oxygen among the candidates. The operating factors of oxygen releasing performance were investigated in detail including adsorption temperature, desorption temperature, adsorption time, CO2 flow rate and CO2 partial pressure. It was concluded that the temperature and CO2 flow rate are the main reasons affecting the performance of perovskite oxygen sorbents. The optimal operating parameters of oxygen releasing performance for BaCo0.6Ni0.4O3−δ were as follows: adsorption temperature was 850 °C, desorption temperature was 850 °C, air adsorption time was 30 min, CO2 flow was 200 ml min−1 and the ratio of CO2/N2 was 100 : 0. The oxygen production amount of BaCo0.6Ni0.4O3−δ was 49.5 mg g−1 under the optimal reaction conditions. Finally, multiple cycles demonstrated that BaCo0.6Ni0.4O3−δ displays higher stability and regeneration capacity, which is the key factor providing a stable O2/CO2 gas stream for oxyfuel combustion application.
研究领域:
材料科学
·
无机化学
·
能源化学
·
化学工程
·
功能材料
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2016
·Vol. 4
·期 5
·798-806
·
IF 5.359
Enhai Song,Zitao Chen,Ming Wu,Sha Ding,Shi Ye,Shifeng Zhou,Qinyuan Zhang
In contrast to well-known multiple and fixed upconversion (UC) emission bands from lanthanide (Ln 3+ ) ions activated luminescent materials, room temperature wavelength-tunable single-band UC emissions are designed and demonstrated in Ln 3+ ions/transition metal Yb 3+ /Mn 2+ codoped fluoride perovskites ABF 3 (A = K + , Rb + , and Cs + ; B = Mg 2+ , Zn 2+ , and Cd 2+ ). Upon 976 nm laser excitation, the perovskites ABF 3 :Yb 3+ , Mn 2+ exhibit intense single band UC emission centered at 550–610 nm depending on the substitution of the A + and / or the B 2+ species in ABF 3 . Crystal structure and luminescent properties analysis show that the UC emission should originate from the transitions of super-exchange coupled Yb 3+ –Mn 2+ pair. The Stokes and UC emission properties, UC luminescence decay behaviors, as well as temperature dependent UC emission properties of ABF 3 :Yb 3+ , Mn 2+ are investigated and discussed in detail. The intense room (or high) temperature UC emission and ultralong UC decay lifetimes (≈25–45 ms) clearly reveal that the perovskites ABF 3 :Yb 3+ , Mn 2+ can be potentially applied in the fields of time-resolved luminescence imaging, lighting, and solid state lasers.
研究领域:
材料科学
·
光学材料
·
无机化学
·
光子学
·
固体物理
✓ 已验证
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2019
·
IF 1.337
Zhen Xiao,Jiawei Zhang,Jing Zhu,Hui Xu,Huanping Wang,Shiqing Xu,Yang Xia
Ho 3+ /Yb 3+ co-doped PbTiO 3 nanocrystals with different content of dopant were successfully prepared via a facile hydrothermal method. The purity, morphology, element distribution, chemical state and up-conversion (UC) photoluminescence (PL) of PbTiO 3 nanocrystals affected by Ho 3+ dopant are investigated systematically. X-ray diffraction (XRD) results illustrate that PbTiO 3 samples with the doping Ho 3+ concentration ranging from 0 to 5 mol-% are perovskite structure. The doping Ho 3+ ions have no change on the crystal structure of perovskite PbTiO 3 . Owing to the non-equivalent substitution of Ho 3+ to Ti 4+ in PbTiO 3 , the particle size of Ho 3+ /Yb 3+ co-doped PbTiO 3 samples is decreased as well as the particle agglomeration is detected. Moreover, Ho and Yb ions have uniform distributions in the PbTiO 3 nanoparticles as the presence of Ho 3+ and Yb 3+ cations. The up-conversion spectra demonstrate that Ho/Yb co-doped PbTiO 3 samples have up-conversion emissions centered at 550 nm, 660 nm and 755 nm, corresponding to the transitions of 5 F 4 ( 5 S 2 )→ 5 I 8 , 5 F 5 → 5 I 8 and 5 S 2 ( 5 F 4 )→ 5 I 7 of Ho 3+ ions. Additionally, the effect of temperature on the UC PL property of Ho 3+ /Yb 3+ co-doped PbTiO 3 system is further investigated. The sensitivity and the trend of Ho 3+ /Yb 3+ co-doped PbTiO 3 samples in temperature from 298 k to 493K are calculated on the basis of fluorescence intensity ratio (FIR) method. Ho 3+ /Yb 3+ co-doped PbTiO 3 nanocrystals are verified the high potential in the optical temperature sensing.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
光子学
·
功能材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·Vol. 44
·期 39
·22250-22262
·
IF 4.084
Hongri Wan,Xiaofang Hu
Nitrogen/sulfur co-doped disordered porous biocarbon was facilely synthesized and applied as anode materials for lithium/sodium ion batteries. Benefiting from high nitrogen (3.38 wt%) and sulfur (9.75 wt%) doping, NS 1-1 as anode materials showed a high reversible capacity of 1010.4 mA h g −1 at 0.1 A g −1 in lithium ion batteries . In addition, it also exhibited excellent cycling stability, which can maintain at 412 mAh g -1 after 1000 cycles at 5 A g −1 . As anode materials of sodium ion batteries , NS 1-1 can still reach 745.2 mA h g −1 at 100 mAg -1 after 100 cycles. At a high current density (5 A g -1 ), the reversible capacity is 272.5 mA h g −1 after 1000 cycles, which exhibits excellent electrochemical performance and cycle stability. The preeminent electrochemical performance can be attributed to three effects: (1) the high level of sulfur and nitrogen; (2) the synergic effect of dual-doping heteroatoms; (3) the large quantity of edge defects and abundant micropores and mesopores , providing extra Li/Na storage regions. This disordered porous biocarbon co-doped with nitrogen/sulfur exhibits unique features, which is very suitable for anode materials of lithium/sodium ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能碳材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 4
·5337-5346
·
IF 3.741
Chuangang Yao,Jixing Yang,Haixia Zhang,Sigeng Chen,Jian Meng,Kedi Cai
Summary Cu doped perovskites SrFe 0.9- x Cu x Mo 0.1 O 3- δ (SFCM, x = 0-0.2) are explored as cathodes for IT-SOFCs. The influence of Cu doping on the property of SFCM series was studied in detail. The oxygen content decreases with the increase of Cu doping amount. SFCM samples are chemically compatible with LSGM electrolyte. However, the TEC values are still a bit higher than that of some common SOFC electrolytes. At 750°C, the R p values are 0.261, 0.227 and 0.155 Ω·cm 2 for SFCM0, SFCM0.1, and SFCM0.2. The obtained activation energies for x = 0, 0.1, and 0.2 are 1.01, 0.98, and 0.87 eV, respectively. These results indicate that Cu doping into SrFe 0.9- x Cu x Mo 0.1 O 3- δ has a favorable effect on the electrochemical activity of the materials.
研究领域:
材料科学
·
电化学
·
能源材料
·
固体氧化物燃料电池
·
无机功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL COMMUNICATIONS
·
2024
·Vol. 61
·期 8
·1701-1704
·
IF 4.3
Hao-Xing Xu,Ze-Run Zhao,Xiao Wang
This study demonstrates that metal-doped-clay (MDC) can be a selective platform for ribose produced from formaldehyde under abiotic conditions. Ribose exhibits superior retention compared with other carbohydrates on naturally occurring minerals on the early Earth in the presence of divalent cations. This finding offers an insight into the necessity of the emergence of ribose as the backbone of extant RNA.
研究领域:
化学生物学
·
分子进化
·
前生命化学
·
地球生物学
·
生物无机化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Xue Bai,Wen Li,Aijia Wei,Qian Chang,Lihui Zhang,Zhenfa Liu
Spinel Li 4 Ti 5 O 12 doped with F was synthesized via the solid-state reaction of anatase TiO 2 , Li 2 CO 3 , and NH 4 F. The structural characterization and electrochemical performance evaluation of the prepared materials were carried out utilizing X-ray diffraction, scanning electron microscopy, galvanostatic charge-discharge, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) tests. The lattice parameters of all samples were calculated using an internal standard and Rietveld refinement method. The results indicate that the F was successfully doped into the lattice structure of Li 4 Ti 5 O 12 , and this process did not influence the crystal structure and superficial morphology. Moreover, the best-performing material, Li 4 Ti 5 O 11.9 F 0.1 delivers superior rate capacities of 165, 162.1, 160.0, 142.3, 125.1, and 99.2 mAh g −1 , at 0.2 C, 0.5 C, 1 C, 3 C, 5 C, and 10 C, respectively, which is higher than those of Li 4 Ti 5 O 12 (150.0, 135.0, 123.5, 93.7, 76.4, and 56.8 mAh g −1 at the same C-rates), and the cycling retention is 82.7% after 150 cycles at 5 C. Meanwhile, the charge-transfer resistance (R ct ) of Li 4 Ti 5 O 11.9 F 0.1 (56.4 Ω) is lower than that of pure Li 4 Ti 5 O 12 (80.6 Ω), and the lithium-ion diffusion coefficients (D Li + ) of Li 4 Ti 5 O 11.9 F 0.1 (2.505 × 10 −10 cm 2 s −1 ) is higher than that of pure Li 4 Ti 5 O 12 (1.694 × 10 −10 cm 2 s −1 ).
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固体化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 23
·12429-12437
·
IF 14.511
Shuang Li,Yunxiang Hou,Di Li,Bo Zou,Qingtang Zhang,Yang Cao,Guodong Tang
SnSe is considered one of the most intriguing new thermoelectric materials. Polycrystalline SnSe offers a wide range of thermoelectric applications due to its facile synthetic processing and machinability. Herein, we have achieved a high average ZT of 0.8 as well as a high peak ZT of 1.86 in solution-synthesized porous Zn and Ga codoped SnSe nanosheets, generating a maximum energy conversion efficiency of 13.3%. High-density micro/nanopores are induced in the SnSe matrix, which are more effective for scattering phonons and reducing the thermal conductivity. The high density of micro/nanopores, nanosheet structure and dislocations contribute to an ultralow lattice thermal conductivity (0.157 W m−1 K−1 at 873 K). Meanwhile, Ga incorporation can induce band convergence and create resonance levels, producing a large Seebeck coefficient. Ga and Zn codoping contributes to a sharp increase in carrier concentration and an obviously increased electrical conductivity. The enhanced Seebeck coefficient and increased carrier concentration help in achieving a significant enhancement of the power factor over a wide temperature range in the porous Zn and Ga codoped SnSe nanosheets. Consequently, high thermoelectric performance is realized over a wide temperature range via the decoupling of electron–phonon transport in SnSe. This work opens up a great opportunity for designing prospective materials for thermoelectric applications with the aid of the solution synthesis route.
研究领域:
材料科学
·
凝聚态物理
·
纳米科技
·
能源材料
·
半导体物理
·
热电转换
·
无机功能材料
✓ 已验证
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2018
·Vol. 215
·期 11
·1700905
·
IF 1.795
Shuping Deng,Decong Li,Liping Zheng,Yu Tang,Zhong Chen,Luqi Sun,Wenting Liu,Lanxian Shen,Shukang Deng
In this work, the effect of Cd and Sn atoms partly substitution for Zn on among crystal growth, thermal stability, mechanical, and electrical transport property in β-Zn 4 Sb 3 is reported. In a series of samples prepared from the atomic ratios of Zn:Sb:Cd:Sn = 4.4:3: x :3 ( x = 0.2, 0.4, 0.6, and 0.8). Carrier concentration of all samples varies from 4.52 × 10 19 to 6.42 × 10 19 cm −3 as carrier mobility changes from 58.27 to 67.93 cm 2 V −1 s −1 at room temperature. As a result, electrical transport properties of the samples are optimized by Cd Sn co-doped. The experimental density of all the samples varies from 6.26 × 10 3 to 6.34 × 10 3 kg m −3 consistent with the theoretical value. The weight loss and melting point of the sample are determined to discuss thermal stability in the heating process in air, indicating that the single crystals β-Zn 4 Sb 3 possess an excellent thermal stability and it is practical importance in the TE application at high temperature. Consequently, the maximal power factor of 1.70 × 10 −3 W m −1 K −2 is achieved at 540 K for the sample with initial Cd content x = 0.2, which is enhanced by 40% compared with the single-doping system in β-Zn 4 Sb 3 .
研究领域:
材料科学
·
热电材料
·
固体物理
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 5
·期 15
·1800515
·
IF 4.834
Lingxia Zheng,Wangwang Hu,Xuwei Shu,Huajun Zheng,Xiaosheng Fang
Cobalt phosphides based materials are considered as promising electrocatalysts for the hydrogen evolution reaction (HER). The catalytic performance can be further enhanced by improving the intrinsic catalytic activity, exposing more active sites and coupling with conductive support. Herein, a novel electrocatalyst based on nitrogen doped reduced graphene oxides decorates with uniformly distributed CoP x nanoparticles with a suitable P/Co ratio ( x = 1.7) via a facile and mild condition. The optimized composite (CoP x /N-rGO) exhibits superior electrocatalytic HER activities with a low overpotential of 104 mV (at 10 mA cm −2 ), a small Tafel slope of 65 mV dec −1 , and long-term stability in the alkaline media, comparable to the performance of other HER electrocatalysts. The remarkable HER performance can be ascribed to the good electrical conductivity of rGO and extra active sites created by nitrogen doping. In addition, the ultrafine nanostructure (average particle size ≈4 nm) and well-dispersed CoP x nanoparticles also help expose more active sites for electrocatalytic reactions, largely hindering the agglomeration and exfoliation. This work provides a versatile route on the design of multifunctional composite materials for renewable energy research with low cost and high activity.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源化学
·
催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xibao Zhang,Yonghui Xu,Xiudi Wu,Shuwen Yin,Chuansheng Zhong,Chenxue Wang,Liang Zhou,Hongpeng You
A series of novel Bi 3+ /Ln 3+ -activated Ca 2 ScSbO 6 (CSSO) phosphors were synthesized by solid-state method and their luminescent behaviors were investigated in detail. Under the 302 nm excitation, the CSSO:Bi 3+ shows remarkable near-ultraviolet photoluminescence with a peak emission at 365 nm. Eu 3+ -activated CSSO phosphor possesses high efficiency and no obvious reduction of emission intensity even after replacing Sc with Eu completely, which indicates a low-concentration quenching effect. In addition, its emission intensity at 423 K (I 423K ) still maintains 88 % compared with that of at room temperature (I 298K ), indicating good thermostability. In contrast, the CSSO:Bi 3+ phosphor exhibits a significant reduction in emission intensity, maintaining only 49 % of its luminescence at 423 K (I 423K /I 298K ). By codoping Bi 3+ and Ln 3+ (Ln = Eu, Tb, Dy, Sm), the energy transfer was observed from the Bi 3+ to Ln 3+ ions, endowing the CSSO:Bi 3+ , Ln 3+ phosphors with tunable multicolor emissions. Leveraging the differing thermostabilities of the emission spectra for Bi 3+ and Ln 3+ ions, we designed and assessed a range of sensitive optical thermometers. Among these, the CSSO:Bi 3+ , Eu 3+ phosphors exhibited the best performance, boasting maximum absolute and relative sensitivities of 9.96 % K −1 and 2.002 % K −1 , respectively. Additionally, we displayed the multi-mode anti-counterfeiting function of synthesized phosphors, and a multi-color switching system was designed with the advantages of direct visualization and easy identification of encrypted information. These results indicate that Bi 3+ and Ln 3+ coactivated CSSO phosphor has the potential application for non-contact temperature measurement and anti-counterfeiting.
研究领域:
材料科学
·
光学工程
·
无机化学
·
功能材料
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）