Advanced Optical Materials
·
2023
·Vol. 11
·期 12
·2203016
·
IF 9
He Wang,Xi Zhang,Yali Ma,Mengke Wang,Jun Wang
Flexible optoelectronic devices have attracted enormous attention as an essential component in next-generation wearable devices. To meet the trend of biocompatibility, flexibility and low cost, paper-based optoelectronic devices have become compelling candidates. Moreover, 2D organic–inorganic metal halide perovskites have been extensively studied for the application in flexible optoelectronic devices owing to their long-term moisture stability, optoelectronic tunability, and multiple quantum well (MQW) structures. Herein, the paper-based flexible optoelectronic devices are designed by spin-coating PEDOT:PSS and (iso-BA) 2 MA n -1 Pb n I 3 n +1 ( n ≥ 1) on regular filter paper with responsivity of 2.62 mA W −1 and response time (τ rise /τ decay ) of 0.81/0.18 s at 35% relative humidity (RH). Furthermore, the responsivity may be increased by 250% within the humidity range from 35% to 90%, and remains above 92% of the initial value after measured for 1800 s at 60% RH. This work can pave the way for further studies about the humidity effect on perovskites for next-generation green wearable electronics.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
可穿戴技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yanjia Zhou,Guihong Lan,Yongqiang Liu,Songsong Xue,Bo Xu,Haiyan Qiu,Keyu Pu
To obtain a demulsification material with convenient recovery, high oil-water separation capacity, and excellent reusability, Fe 3 O 4 @SiO 2 core-shell particles and hydrophilic DMC were introduced into the acrylic ester-based polymer system to prepare a magnetic amphiphilic composite demulsifier, Fe 3 O 4 @SiO 2 /poly(SMA-co-BA-co-BZMA-co-DMC) (Fe 3 O 4 @SiO 2 /PAMCs-P). The molecular structure of Fe 3 O 4 @SiO 2 /PAMCs-P was characterized using FT-IR and XPS, while the morphology was observed using SEM. Additionally, the effects of TEOS, Fe 3 O 4 @SiO 2 core-shell particles, and DMC dosage on the demulsification performance of the composites were discussed in detail. Fe 3 O 4 @SiO 2 /PAMCs-P exhibited excellent demulsification, oil-water separation, and reusability properties for CTAB-toluene emulsions. Under magnetic field conditions, Fe 3 O 4 @SiO 2 /PAMCs-P achieved saturated separation within 2 h with a separation efficiency of 97.9%. After five consecutive separations, the separation efficiency decreased to 39.1%, but it could be restored to 91.5% of the initial separation efficiency after desorption. These results indicate that Fe 3 O 4 @SiO 2 /PAMCs-P has valuable application potential in emulsified wastewater treatment.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Ning Li,Hong Shao,Haina Qi,Yuqi Sheng,Liu Yang,Yunrui Xie,Dan Li,Wensheng Yu,Qianli Ma,Xiangting Dong
A simple and universal technique of the combination of uniaxial electrospinning with subsequent peculiar dual-crucible fluorination technology is innovatively designed and used to construct metallic fluorides yolk-shell nanofibers (YSNFs) and yolk-shell nanobelts (YSNBs) directly for the first time. As a case study, Yb 3+ /Er 3+ co-doped alkaline earth metal fluoride (BaF 2 , SrF 2 and CaF 2 ) as core layer and SiO 2 as shell layer are applied to construct the yolk-shell one-dimensional nanostructures . Under the optimum calcination temperature (600 °C) and time (5 h), the obtained MF 2 :Yb 3+ , Er 3+ /SiO 2 (M=Ba, Sr, Ca) samples are of pure cubic phase, and display the yolk-shell nanofibers and yolk-shell nanobelts with good size uniformity and green up-converting fluorescence. By HF acid treatment of the samples, it is not only proved that the shell layer is SiO 2 , but also independent core-layer MF 2 :Yb 3+ , Er 3+ (M=Ba, Sr, Ca) nanofibers and nanobelts with good size uniformity and excellent up-conversion luminescence are obtained. Especially, only fluorination process among the halogenation can form such exceptive YSNFs and YSNBs one-dimensional nanostructures , and the formation mechanisms of YSNFs and YSNBs are proposed and verified, and further the novel technique is established. The new technique possesses the merits of simple device and easy operation, large output, well-defined morphology and high preparative success rate of yolk-shell nanofiber and yolk-shell nanobelt, universality to metallic fluorides. The design philosophy and the construction technique for the exceptional yolk-shell one-dimensional nanostructures afford a facile approach for the fabrication of other functional metal fluorides yolk-shell one-dimensional nanostructures.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2019
·
IF 2.29
Jun-Feng Wang,Pan Liang
A pure barium borate of BaB 8 O 11 (OH) 4 ·3H 2 O has been synthesized and characterized by XRD, FT-IR, TGA, and chemical analysis. The molar enthalpies of solution of BaB 8 O 11 (OH) 4 ·3H 2 O in 1 mol dm −3 HCl(aq), and Ba(OH) 2 ·8H 2 O in the mixture solvent of {2.00 cm 3 of 1 mol·dm −3 HCl + H 3 BO 3 (aq)} were measured by microcalorimeter at T = 298.15 K, respectively. With the use of previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol·dm −3 HCl(aq), and the standard molar enthalpies of formation for Ba(OH) 2 ·8H 2 O(s), H 3 BO 3 (s), and H 2 O(l), the standard molar enthalpy of formation of −(7500.6 ± 6.5) kJ·mol −1 at T = 298.15 K was obtained based on an appropriate thermochemical cycle. Moreover, the molar enthalpy of formation of −6091.7 kJ mol −1 for [B 8 O 11 (OH) 4 ] 2− was estimated by a group contribution method, which was used to predict the Δ f H m o of a series of alkaline-earth metal borates for MB 8 O 11 (OH) 4 (M = Ca, Sr, Ba).
研究领域:
物理化学
·
无机化学
·
热化学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2019
·
IF 0
Abdeldjalil Zegaoui,Mehdi Derradji,Hamid Abdelhafid Ghouti,Aboubakr Medjahed,Li-wu Zu,Wen-bin Liu,Jun Wang,Abdul Qadeer Dayo,Yu-guang Liu
This manuscript aimed to examine the impact of the hybridization process of hybrid fibers consisting of carbon and basalt fibers on the properties of thermosetting resin blends composed of dicyanate ester of bisphenol-A (DCBA) and bisphenol-A based benzoxazine (BA-a) resins. According to data gathered, the mechanical properties of the hybrid fibers reinforced the DCBA/BA-a blend composites were chiefly improved when compared to the base samples’ properties, while the hybridized composites showed much enhanced thermal stability degradation at higher temperatures. The shielding evaluations disclosed that the integration of the hybrid fibers helped the DCBA/BA-a blend to possess excellent nuclear shielding properties. With respect to the properties of the as-used reinforcing systems, performing the structural and morphological analyses permitted us to prove that the enhanced quality of the reinforcing agents inside the thermoset resin blend was possibly behind these ameliorations in the investigated performances.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
CATALYSIS TODAY
·
2014
·
IF 3.309
Yuxi Gao,Xiaodong Wu,Shuang Liu,Duan Weng,Hongwei Zhang,Rui Ran
MnO x –CeO 2 mixed oxides were synthesized using a sol–gel method and the barium-loaded catalyst was prepared by a wet impregnation. Both catalysts were hydrothermally aged at 800 °C for 10 h. The fresh and aged catalysts were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), high-resolution transmission electron microscopy (HRTEM), H 2 temperature-programmed reduction (H 2 -TPR), NO temperature-programmed oxidation (NO-TPO) and soot temperature-programmed oxidation (soot-TPO). Compared with MnO x –CeO 2 , the Ba-modified mixed oxides show a much higher hydrothermal stability. Barium exists in the form of orthorhombic carbonate and cubic nitrate on the fresh sample. BaMnO 3 nanoparticles are identified to form at the interface of CeO 2 crystallites upon the hydrothermal ageing. The formation of the perovskites prohibits the sintering of ceria significantly, and consequently maintains the redox property of the aged mixed oxides to a great degree. Additionally, the nanoscaled perovskites themselves also contribute to the catalytic activity of the aged oxides catalyst.
研究领域:
催化材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 10
·期 4
·2204755
·
IF 17.521
Shaoxin Cui,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Oxychalcogenides capable of exhibiting excellent balance among large second-harmonic generation (SHG) response, wide band gap ( E g ), and suitable birefringence (Δ n ) are ideal materials class for infrared nonlinear optical (IR NLO) crystals. However, rationally designing a new high-performance oxychalcogenide IR NLO crystal still faces a huge challenge because it requires the optimal orientations of the heteroanionic groups in oxychalcogenide. Herein, a series of antiperovskite-type oxychalcogenides, Ae 3 Q[GeOQ 3 ] (Ae = Ba, Sr; Q = S, Se), which were synthesized by employing the antiperovskite-type Ba 3 S[GeS 4 ] as the structure template. Their structures feature novel three-dimensinoal frameworks constructed by distorted [QAe 6 ] octahedra, which are further filled by [GeOQ 3 ] tetrahedra to form antiperovskite-type structures. Based on the unique antiperovskite-type structures, the favorable alignment of the polarizable [GeOQ 3 ] tetrahedra and distorted [QAe 6 ] octahedra have been achieved. These contribute the ideal combination of large SHG response (0.7–1.5 times that of AgGaS 2 ), wide E g (3.52–4.10 eV), and appropriate Δ n (0.017–0.035) in Ae 3 Q[GeOQ 3 ]. Theoretical calculations and crystal structure analyses revealed that the strong SHG and wide E g could be attributed to the polarizable [GeOQ 3 ] tetrahedra and distorted [QAe 6 ] octahedra. This research provides a new exemplification for the design of high-performance IR NLO materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2022
·Vol. 39
·期 10
·2625-2636
·
IF 2.058
Hang Liu,Xingke Zheng,Pengcheng Wang,Haiyan Wang,Yuhong Zhang
In this work, a comparative study of the upconversion (UC) luminescence properties of ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, and Ca) scheelite phosphors and ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}} $-co-doped ${{\rm MgWO}_4}$ wolframite phosphors is reported. Under 980 nm excitation, all the samples emit green and red emissions. The ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-doped ${{\rm MgWO}_4}$ phosphor has a higher UC emission intensity. Furthermore, the optical temperature sensing properties in ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, Ca, and Mg) phosphor samples are investigated. The relative sensitivity (${{\rm S}_r}$) based on thermally coupled levels (TCLs) increases gradually with an increase in matrix phonon energy. The absolute sensitivity (${{\rm S}_a}$) values of the samples are accurately predicted by the chemical bonding parameter (${{\rm f}_c}$). The results of the correlation between the UC luminescence properties and the microscopic crystal structure, and the relationship of the temperature sensitivity and the host parameters, provide us with a guiding insight for the selection of a host material with ideal temperature measurement capability.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Geng Tang,Hong Yang,Bingqing Zhao,Dunying Wang,Fangfang Zeng,Qibin Liu
The rapid repair of bone defects remains a challenging clinical goal, with bio-piezoelectric composites emerging as promising materials due to their ability to replicate bone’s natural composition and electrical functionality. This study developed hydroxyapatite (HA)-based composites incorporating (Ba,Ca)(Ti,Sn)O3-based piezoceramics, achieving piezoelectric coefficients of 28.7 ± 2.48 pC/N, 11.1 ± 0.57 pC/N, and 5.7 ± 0.98 pC/N at HA mass fractions of 10%, 20%, and 30%, respectively, with a porosity around 20%. The composites were synthesized with a solid-state sintering method. The phase structure, surface morphology, and ferroelectric domain configuration of the composites were characterized. Electrical properties, compressive strengthen, hydrophilicity, in vitro bioactivity, biocompatibility and osteogenic ability were assessed. X-ray diffraction (XRD) analysis confirmed that all composites consisted of perovskite structure and HA phases. Microscopic observations revealed the (Ba,Ca)(Ti,Sn)O 3 -based piezoceramics particles embedded within the HA matrix. Evenly dispersed, irregular pores were formed, and pore size decreased as the HA content increased. The composite with 20 wt.% HA exhibited dense, small wedge-shaped domains and ferroelectric orthogonal (O) phase. Importantly, these composites demonstrated favorable compressive strength, surface wettability and biocompatibility, along with enhanced bioactivity and osteogenic differentiation ability in vitro , underscoring their potential in bone tissue engineering applications.
研究领域:
生物医学工程
·
材料科学
·
骨组织工程
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 13
·e70894
·
IF 4.1
Siqi Tan,Jie Gu,Kexin Sha,Yihan Jiao,Yanxi Wu,Yiru Wang,Hongjian Yu,Jie Han
Niobates have emerged as promising candidates for environmental catalysis, particularly in the realm of piezocatalysis, owing to their distinctive layered architectures and robust physicochemical performance. In this study, we report the successful fabrication of A-site cation-tailored ABi 2 Nb 2 O 9 (A = Sr, Ca, and Ba) layered oxides via a molten salt strategy. Notably, the molten salt-synthesized SrBi 2 Nb 2 O 9 exhibits superior piezocatalytic performance in H 2 O 2 evolution with a yield reaching 1836.1 µmol g −1 h −1 , approximately 2.1 times higher than that of SrBi 2 Nb 2 O 9 prepared by the solid-state method. Furthermore, this material demonstrates exceptional piezocatalytic activity, degrading 98.0% of Rhodamine B within 75 min, with a reaction rate constant of 0.04966 min −1 . In addition, the catalyst shows durable stability, maintaining 97% of its original activity after four cycles. The influence of environmental factors, including solution pH and inorganic anions (Cl − and CO 3 2− ), was also systematically evaluated. This work elucidates that the synergistic integration of A-site cation engineering and molten salt synthesis effectively modulates the piezoelectric response of ABi 2 Nb 2 O 9 (A = Sr, Ca, and Ba), offering new insights and a viable pathway for the design of novel, high-performance piezocatalysts for environmental remediation. Graphical Molten salt-mediated A-site cation engineering of ABi 2 Nb 2 O 9 effectively modulates piezoelectric response, achieving superior piezocatalytic H 2 O 2 production and pollutant degradation. This work provides a viable pathway for designing high-performance piezocatalysts for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jie Li,Ziyi Zhang,Hongji Zou,Ying Tang,Weiping Gong,Liang Fang
Dense ALaGa 3 O 7 (A = Ba, Sr, Ca) ceramics with tetragonal melilite structure were prepared by the solid-phase method. The optimal microwave dielectric properties were obtained with ε r = 11.1 ± 0.1, 11.3 ± 0.1, 13.3 ± 0.1; Q × f = 49,400 ± 300, 31,100 ± 300, 17,100 ± 300 GHz; and τ f = −41.5 ± 1.0, −36.6 ± 1.0, −28.8 ± 1.0 ppm/°C for BaLaGa 3 O 7 , SrLaGa 3 O 7 , and CaLaGa 3 O 7 , respectively. The increased ε r and τ f while reduced Q × f in the order of BaLaGa 3 O 7 , SrLaGa 3 O 7 , and CaLaGa 3 O 7 were mainly due to the enhanced rattling effect of A-site, which resulted in large positive discrepancy Δ ε r between ε r ( Corr ) and ε r (C-M) increasing from +31.8 % to +74.7 %. The vibration modes, chemical bond characteristic and intrinsic dielectric properties were analysed by Raman, P-V-L theory, and far-infrared reflectance spectroscopy. Additionally, a dielectric resonator antenna based on BaLaGa 3 O 7 ceramic was designed with a bandwidth of 270 MHz at 6.8–7.1 GHz and a gain of 5.6 dBi at 6.9 GHz, indicating the potential candidate for dielectric resonator antennas.
研究领域:
材料科学
·
电子功能材料
·
微波技术
·
无机非金属材料
·
介电材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 10
·3826-3837
·
IF 8.067
Qing Yao,Jie Zhang,Kaiyu Wang,Changqian Li,Chenyu Shang,Haiqing Sun,Weiwei Zhang,Tianliang Zhou,Huiling Zhu,Jianxu Ding
Recently, quasi-two-dimensional (quasi-2D) organic–inorganic hybrid perovskites, such as those obtained by introducing long-chain organic cations like n-butylammonium (BA) into 3D MAPbI3 perovskites, have been widely investigated as optoelectronic devices owing to their high light absorption coefficient, ultra-long carrier diffusion length, and high defect tolerance. Controlling the BA content to obtain (BA)2(MA)n−1PbnI3n+1 with homogeneous n values is crucial for extraction of photo-carriers because volatile n value related interior heterojunctions are unfavorable for extraction of photo-carriers. Here, we revealed the fundamental growth mechanism of (BA)2(MA)n−1PbnI3n+1. The growth mechanism of (BA)2(MA)n-1PbnI3n+1 SCs is controlled by the evolution of macroscopic spiro dislocations and its derived growth steps. In terms of the understanding of the surface growth mechanism, we grew a series of single crystals with individual n values, avoiding interior heterojunctions, and obtained a lower dark current of 0.247 nA, a high photocurrent (74.5 nA) and high responsiveness (0.064 A W−1) and an external quantum efficiency of 19.5% for a photodetector based on the (BA)2(MA)3Pb4I13 SC. This contributes to an in-depth understanding of the growth mechanism of quasi-2D (BA)2(MA)n−1PbnI3n+1 SCs and the development and optimization of quasi-2D layered materials and devices for optoelectronics.
研究领域:
材料科学
·
光电子学
·
晶体生长
·
半导体器件
·
钙钛矿材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）