JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Hui Gao,Siyuan Liu,Zhipeng Xue,Wenjing Liu,Yanguang Nie,Guoqing Chen,Xiaolong Li
Herein, CsPbBr 3 quantum dots (QDs) were successfully synthesized via the supersaturated recrystallization (SR) method by using para-xylene as the anti-solvent. The as-prepared CsPbBr 3 QDs exhibited high quantum efficiency (78%) and narrow luminescent peaks with a full width at half maximum of around 21.2 nm. Compared with the commonly-used anti-solvents, para-xylene shows low toxic effect and high freezing point (13.3 °C). Therefore, CsPbBr 3 QDs can be easily preserved in the refrigerator like an ice-cream for further use. The maximum photoluminescence (PL) emission intensity would reach 90% retention after 60 days’ storage in the refrigerator. By using this simple method, the stability of CsPbBr 3 QDs has been effectively improved for long-term storage and further application.
研究领域:
材料科学
·
纳米科技
·
光电子学
·
无机化学
·
半导体材料
✓ 已验证
DOI
高影响因子
CHEMICAL COMMUNICATIONS
·
2016
·Vol. 52
·期 64
·9969-9971
·
IF 6.567
Yan Zhang,Yubin Niu,Min-Qiang Wang,Jingang Yang,Shiyu Lu,Jin Han,Shu-Juan Bao,Maowen Xu
In this communication, we designed and synthesized a novel calcium–organic framework and presented it as an anode material for sodium-ion batteries. The results show that it delivers a reversible capacity of higher than 140 mA h g−1 even after 300 cycles. The remarkable performance is attributed to the high structural stability and extremely low solubility of the calcium–organic framework in electrolytes.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2017
·
IF 4.747
Enmin Chen,Lianqi Cao,David Julian McClements,Shilin Liu,Bin Li,Yan Li
The impact of incorporating different levels of cinnamaldehyde (CA) into the oil phase used to prepare whey protein isolate (WPI)-stabilized nanoemulsions was investigated. Stable nanoemulsions could not be formed by pure CA, which was attributed to gravitational separation, but they could be formed from mixtures of CA and triglycerides. The mean particle diameter produced by homogenization decreased with increasing CA, which was attributed to the reduction of oil phase interfacial tension and viscosity. CA enhanced the physical stability of the nanoemulsions to salt addition (0–500 mM) and thermal processing (30–90 °C), but could not prevent droplet flocculation near the protein's isoelectric point (around pH 5). SDS-PAGE and surface load measurements indicated that more protein accumulated at the droplet surfaces in the presence of CA, which was attributed to interfacial crosslinking. CA may therefore be a useful means of modulating the physicochemical properties of protein-stabilized nanoemulsions.
研究领域:
食品科学
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胶体与界面化学
·
蛋白质功能特性
·
递送系统
·
食品纳米技术
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2018
·
IF 4.358
Zhaocheng Zhang,Dongyang He,Haiyang Liu,Miao Ren,Yanan Zhang,Jiao Qu,Nan Lu,Jiunian Guan,Xing Yuan
Black phosphorus (BP), a superior two-dimensional (2D) semiconductor, has attracted much attention due to its unique properties. The graphene (GR)-BP hybrid was synthesized through one pot chemical vapor transport (CVT) approach. The characterization results indicated that P atom was successfully incorporated into GR by the formation of P-C bond. Remarkably, the newly-synthesized GR-BP represented high photocatalytic activity towards 2-chlorophenol (2-CP) degradation, due to the high efficiency of charge separation and transformation caused by the direct band gap of BP and carrier mobility of GR. The removal efficiency for 2-CP reached up to 87.08% within visible light irradiation for 180 min ( λ > 420 nm). The degradation rate of GR-BP hybrid for 2-CP was approximately 7.29-fold than that of BP within 30 min. In addition, the little increasing of the peak for P-O bond in GR-BP hybrid was observed after being exposed in air for 15 days, meant that the stability of BP was significantly enhanced. It was caused by the decreasing of the oxidation sites in BP due to the formation of P-C bond in hybrid. In brief, our synthetic method for GR-BP not only provides a novel route for the improvement of the stability of BP, but also constitutes an insight into the promising practical application of BP in the photocatalysis field.
研究领域:
材料科学
·
纳米科技
·
光催化
·
半导体材料
·
环境化学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2012
·
IF 3.285
Yi Liu,Hai-Xiao He
Mesoporous alumina with a narrow pore size distribution is synthesized by direct thermolysis of Al-based coordination polymer. By applying the appropriate thermolysis temperature, both high surface area and large pore volume are obtained with the collapses and elimination of the 1,4-benzenedicarboxylate linkers of Al-based coordination polymer. This new class of mesoporous alumina display better adsorption properties and higher thermal stability, which retain mesoporous properties and high surface area after calcination in 900 °C. This thermolysis method provides a new approach to synthesize mesoporous alumina with high thermal stability by using coordination polymers.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
多孔材料
·
热分析
✓ 已验证
DOI
高影响因子
THERMOCHIMICA ACTA
·
2018
·
IF 2.189
Feng Bao,Lishuai Zong,Nan Li,Yuanyuan Song,Yunxing Pan,Jinyan Wang,Xigao Jian
In this study, a series of poly(phthalazinone fluorenyl ether ketone ketone) (PPFEKK) copolymers were designed and synthesized via nucleophilic aromatic substitution polymerization of 1,4-bis(4-fluorobenzoyl)benzene (BFBB), 4-(4-hydroxyphenyl)(2 H)-phthalazin-1-one (DHPZ) and 9,9-bis(4-hydroxyphenyl)fluorene (BHPF) to investigate the effects of bulky fluorene units on the processability and thermal degradation behavior of the polymers. The structures of the PPFEKKs were investigated and confirmed by FTIR, 1 H NMR, wide-angle X-ray diffraction (WAXD) and gel permeation chromatography (GPC) techniques. Traditional thermal measurements showed that the T d 5% and T d 10% values of the copolymers increased as the content of BHPF units increased from 0 to 100 mol%, while their glass transition temperatures gradually decreased. The rheological measurements showed that the processability of the copolymers significantly improved upon incorporation of BHPF units; the poly(aryl ether)s were less viscous and thus more processable. The thermal degradation kinetics were clarified using TGA with Kissinger’s method. The copolymer undergoes two thermal degradation processes: as the content of BHPF units in the copolymers increased from 0 to 100 mol%, the activation energy of the first degradation reaction increased from 228 to 254 kJ mol −1 , and the activation energy of the second degradation reaction increased from 271 to 298 kJ mol −1 . The resulting films displayed excellent tensile strength (higher than 76 MPa), and their Young’s modulus values were inversely proportional to their BHPF contents. Dynamic mechanical analysis showed storage modulus values at 30 °C of approximately 2662, 2826, 2698, 2791 and 2830 MPa for the prepared polymers. Furthermore, the PPFEKKs were soluble in a variety of organic solvents, making them suitable for film casting.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 19
·9432-9439
·
IF 3.925
Huibin Guan,Dong Feng,Qi Liu,Tianbiao Zeng
Among the tin-based composites, stannous sulfide (SnS) is a prospective material to serve as an anode for lithium-ion batteries (LiBs) owing to its high theoretical-capacity, layer-structure for fast Li+ diffusion paths, and low toxicity. However, severe volume expansion/shrinkage exfoliates the electrode coating, leading to the severe loss of active materials. Herein, free volume was introduced into SnS to relieve the sequelae of volume expansion/shrinkage creatively, which effectively improved the cyclability of the SnS-based anode. The as-synthesized SnS/G-15% exhibited overall optimal electrochemical performances, i.e., the highest reversible capacity and best cyclability over pure SnS, SnS/G-5% and SnS/G-25%. Ex situ scanning electron microscopy images also illustrated that no cracks were generated in the cycled SnS/G-15% electrode. This work highlights an efficient and cost effective approach for the synthesis of long-cycle life and high-cyclability anodes.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Shulei Li,Zhenxu Lin,Quantong Deng,Fu Deng,Mingcheng Panmai,Junying Chen,Yuheng Mao,Shimei Liu,Jun Dai,Yunbao Zheng,Rui Huang,Sheng Lan
Realization of long-term stable lasing from all-inorganic perovskite supercrystals is highly desirable for practical applications in optoelectronic devices. However, lasing from perovskite supercrystals excited by continuous wave laser light remains a challenge due to the photoluminescence degradation induced by thermal accumulation. Here, we report highly stable lasing with low threshold fom a CsPbClBr 2 supercrystal placed on a thin Ag film, which form a CsPbClBr 2 /Ag microcavity, by managing the thermal distribution inside the CsPbClBr 2 supercrystal. Combined numerical simulations and lifetime measurements, the localized electric field in such a hybrid microcavity leads to a spatially localized temperature distribution, which plays a crucial role in suppressing the thermal accumulation on the surface and in eliminating non-radiative recombination defects. The effective thermal management in the hybrid microcavity renders highly stable lasing with low threshold under the irradiation of continuouw wave laser light. Our findings provide a feasible and universal approach to the development of long-term stable perovskite laser.
研究领域:
光学工程
·
凝聚态物理
·
材料科学
·
纳米光子学
·
激光技术
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2023
·
IF 4.1
Kang Cheng,Xinyue Liu,Weichao Huang,Xinyong Gong,Chaoyong Deng
Cr 3+ is an ideal activator for near-infrared phosphor. Cr 3+ ions have an electronic structure in which the outermost shell is not fully filled, which makes the emission of Cr 3+ susceptible to the crystal field environment and the change of local structural. Therefore, when Zn 2+ -Ti 4+ ion pairs are replaced with Al 3+ -Al 3+ /Ga 3+ -Ga 3+ ion pairs , changes in the crystal structure and the crystal field are strengthened, which improves the luminescence performances of Zn 2 TiO 4 :Cr 3+ phosphors. The thermal stability and the intensity of the luminescence can be clearly seen to have increased.
研究领域:
材料科学
·
无机化学
·
发光材料
·
固体物理
·
功能材料
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 16
·6136-6145
·
IF 3.069
Tianlu Xu,Jinrui Zhang,Lijie Qu,Xueyan Dai,Peihong Li,Yanlong Sui,Chunling Zhang
A phenyl group was introduced into the polymeric network of polysiloxane foam for the improvement of its thermal insulation capacity and thermal stability. Phenyl-containing polysiloxane was prepared via ring-opening polymerization, and phenyl-containing polysiloxane foam was fabricated through simultaneous foaming and crosslinking reactions. With increasing phenyl content, the thermal conductivity of the polysiloxane foam decreased from 0.093 W m−1 K−1 to 0.079 W m−1 K−1. When the phenyl content was 6.15 mol%, the average cell diameter decreased from 384 μm to 165 μm and the cell density increased from 0.58 × 108 cells per cm3 to 4.67 × 108 cells per cm3. When the phenyl content was 8.5 mol%, the cell morphology became imperfect and the average cell diameter and cell density reached 259 μm and 1.29 × 108 cells per cm3, respectively. TGA results revealed the improved thermal stability of the polysiloxane foam. The TGA curves under nitrogen and air conditions could be divided into three stages. Under nitrogen conditions, the mass loss of the maximum decomposition stage decreased and the residue at 800 °C slightly increased. Under air conditions, the maximum decomposition temperatures of the three stages increased. The compressive strength and specific compressive strength were measured and showed a downward trend.
研究领域:
高分子材料科学
·
热功能材料
·
复合泡沫材料
·
材料化学
·
绝缘材料工程
✓ 已验证
DOI
高影响因子
Energy Technology
·
2019
·Vol. 7
·期 9
·1900374
·
IF 3.163
Zhong Ma,Dewang Zeng,Shuai Zhang,Rui Xiao
NiFe 2 O 4 oxygen carrier (OC) presents higher oxygen carrying capacity than single metal oxides (NiO and Fe 2 O 3 ). However, the redox ability of NiFe 2 O 4 gets deactivated due to phase segregation. Herein, the investigation of the effect of supports (CeO 2 , CeZrO 2 , and ZrO 2 ) on the phase stability and the redox performance of NiFe 2 O 4 during the chemical looping (CL) process are presented. The structure of NiFe 2 O 4 -based OCs is characterized using different characterization methods. The CL reaction is conducted in a fixed-bed reactor at 900 °C under alternate 5% CO/N 2 and 5% O 2 /N 2 atmospheres. The results indicate that the redox performance and the phase stability of NiFe 2 O 4 -based OCs are significantly affected by the supports. According to experimental results, CeO 2 can improve the oxygen mobility of NiFe 2 O 4 . The CeO 2 –NiFe 2 O 4 OC has the best performance in terms of both recyclability and phase stability during the redox cycles. The results show that CeO 2 –NiFe 2 O 4 can reduce the tendency of Fe segregation due to the high concentration of oxygen vacancies. It can be reduced and reoxidized to the original crystalline phase of NiFe 2 O 4 . Nevertheless, the CeZrO 2 –NiFe 2 O 4 and ZrO 2 –NiFe 2 O 4 OCs have drawbacks related to serious sintering and phase segregation into Fe 2 O 3 .
研究领域:
材料科学
·
化学工程
·
能源化学
·
催化化学
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
·
2013
·Vol. 102
·期 7
·2408-2416
·
IF 2.834
Li Chen,Ying Zhang,Shen Li,Xiuli Wang,Na Li,Yu Wang,Xin Guo,Shan Zhao,Weiting Yu,Guangwei Sun,Yang Liu,Xiaojun Ma
Immobilization of hepatocytes in microcapsules has been a potentially alternative methodology for bioartificial livers (BALs). Moreover, the stability and permeability are the key parameters of these microcapsules. However, these alginate-based microcapsules are unstable if the surrounding medium disrupts the ionic interactions between alginate and the polycation. As hundreds of components are included in human plasma, the stability and permeability in plasma of microcapsules need to be sufficiently investigated. In the present study, the stability of three kinds of alginate-based microcapsules was evaluated when they were immersed in plasma. Our results showed that stability of alginate-α-poly ( l -lysine)-alginate (α-APA) microcapsules was well maintained, better than those of alginate-ε-poly ( l -lysine)-alginate (ε-APA) and alginate–chitosan–alginate (ACA) microcapsules. Also, factors affecting the stability of microcapsules in plasma were analyzed and it showed that heparin was the key factor that affected the stability of α-APA microcapsules, whereas heparin and low molecular electrolytes such as HCO 3 − and H 2 PO 4 − /HPO 4 2− were the factors to ε-APA and ACA microcapsules. In addition, the permeability evaluation showed no decrease in permeability of microcapsules after incubation in plasma. Our study might provide a foundation for the selection and modification of materials for microcapsule-based BAL devices. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 2408–2416, 2014.
研究领域:
生物材料
·
组织工程
·
再生医学
·
肝病学
·
药物递送系统
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）