Crystals
·
2021
·Vol. 11
·期 6
·594
·
IF 2.589
Bing Lei,Xin Wu,Wei Liu
A new organic-inorganic hybrid structure based on copper (I) iodide staircase chain 1D-Cu2I2(5-chloropyrimidine)2(1) has been synthesized by a slow-diffusion method. It emits red emission peaking at 620 nm. The internal quantum yield (IQY) measured for this compound is 6.5% under 360 nm excitation. This compound exhibits potential as a non-rare-earth light-emitting phosphor alternative.Keywords:copper iodide;organic-inorganic hybrid;phosphor
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2018
·Vol. 88
·期 3
·654-659
·
IF 1.745
Wang Lijuan,Lv Hua,Li Binjie,Zhao Yanbao,Sun Lei
Flower-like ceria (CeO 2 ) architectures consisting of well aligned nanosheets were first synthesized by a glycol solvothermal method. The size of CeO 2 architectures is about 5 μm in width and 10 μm in length, with the nanosheets thickness below 100 nm. Subsequently, the adsorbed Ag ions on the surface of CeO 2 were in situ reduced to form Ag nanoparticles (NPs), leading to the fabrication of Ag/CeO 2 hybrid architectures (HAs). The formed Ag NPs with sizes of 20–40 nm were uniformly loaded on the surface of the CeO 2 sheets. The antibacterial properties of Ag/CeO 2 HAs against Gram-negative E. coli and Gram-positive S. aureus were evaluated by minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and a filter paper inhibition zone method. The results demonstrated that Ag/CeO 2 HAs displayed excellent antibacterial activity toward S. aureus and E. coli , which were attributed to the synergistic antibacterial effect between Ag NPs and CeO 2 in HAs . Here, CeO 2 nanoflowers as a new substrate could restrict Ag NPs aggregations and improve their antibacterial activities. Therefore, the resulted Ag/CeO 2 HAs would be considered as a promising antibacterial agent.
研究领域:
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Guokang He,Ce Han,Peng Wang,Ning Gao,Fuwei Sun,Wenyun Li,Weigang Liu,Xinping Qiu,Chen Wang,Guangtao Li
Well-defined mesoporous carbon-supported TiO2 heterostructures, especially with a modulated TiO2 crystalline phase and tunable physicochemical properties of carbon support, hold great potential for numerous advanced applications, but their rational fabrication remains challenging. In this work, a kind of pyrrole-containing bifunctional block copolymer (PEO-b-PPHMA) that can serve as both a structure-directing agent for the generation of mesostructures and a precursor for the formation of robust carbon materials was synthesized to fabricate such heterostructured materials. Based on the self-assembly of PEO-b-PPHMA and its chemical transformation in confined nanochannels, a strategy for the facile construction of diverse well-defined mesoporous TiO2 with integrated carbon layer networks was developed by using a single block copolymer. Importantly, the generated carbon networks (supports) provide sufficient thermal stability to access highly crystalline TiO2 skeletons and to modulate the TiO2 crystalline phase without collapse of the preformed mesoporous structures. Moreover, not only the nitrogen content in the formed carbon layer is easily tunable by varying the treatment temperature but also the functional moieties such as plasmonic particles and redox sites can be flexibly incorporated into the formed carbon layer by employing different oxidative agents for pyrrole chemical transformation. These advantageous synthesis features enable facile and rational access to a series of well-defined mesoporous carbon-supported TiO2 heterostructures with enhanced or new properties. As a demonstration, one mesoporous carbon-supported TiO2 was prepared and used for lithium battery application, exhibiting excellent performance at the forefront of the relevant works in the literature. The obtained results indicate that our synthetic concept may offer new opportunities to develop novel TiO2 nanomaterials for diverse applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 22
·11740-11744
·
IF 7.443
K. P. Annamalai,Jianping Gao,Lile Liu,Jun Mei,Woonming Lau,Yousheng Tao
This is the first report on the synthesis of nanoporous graphene/single wall carbon nanohorns (G/SWCNHs), a novel multicomponent of nanocarbons, using a facile hydrothermal method. Heterostructures were formed with interconnected graphene to support single wall carbon nanohorns (SWCNHs); meanwhile, SWCNHs prevented graphene nanosheets from stacking face-to-face. The samples were thoroughly characterized to illustrate their nanostructures and electrochemical properties. G/SWCNHs showed xerogel-like structures having ultra-micropores of ca. 0.6 nm and mesopores of 2–12 nm with the total nanopore volume of 0.20 cm3 g−1. The heterostructures of G/SWCNHs had an enhanced capacitance of 244 F g−1 in 1 M KOH with ultra fast charge–discharge and excellent rate capability, superior to reduced graphene oxide, SWCNHs and SWCNH composites. The nanohybrid achieved a capacitance retention of 99% after 1000 cycles at a current density of 10 A g−1, promising for practical high power density applications. This study also provides an environmentally friendly process for the preparation of better nanostructured carbons for electrochemical energy storage devices of high-performance.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 4
·807
·
IF 3.4
Hang Li,Chen-Yang Zhang,Ya-Ling Yu,Chang-Jin Liang,Guang-Ming Yuan,Huan Yang,Yun-Ying Wu,Shao-Min Lin
Research on polyurethane sponge (PUS), a widely used polymer material, and its flame-retardant performance is of great significance. In this study, PUS was modified to prepare a highly efficient flame-retardant composite using a soaking method. The PUS nearly vanished at 11 s after ignition, and the solid residue rate of the PUS was 5.65 wt% at 750 °C. The net structure, composed of nano SiO2, was maintained in the modified PUS at 750 °C, and the solid residue rate was 69.23%. The maximum HRR of the PUS decreased from 617 W/g to 40 W/g and the THR of the sample reduced from 33 kJ/g to 9 kJ/g after modification. The results suggested that the modified PUS gained excellent flame-retardant performance. The flame-retardant layer in the modified PUS was amorphous. The surface of the modified PUS was rich in Si, O, and C elements and lacked a N element, suggesting that inorganic flame retardants were abundant on the surface layer of the modified PUS. The Si-O-C vibration and Si-O-Si stretching in the modified PUS indicates that the organic–inorganic hybrid structure formed on the PUS surface, which could be attributed to the polymerization and condensation of the silica precursor. Thus, the modified PUS provided an excellent flame-retardant layer. The results are of interest for producing efficient flame-retardant PUS using a simple method.Keywords:layer-by-layer assembly;sol-gel methods;graphene oxide;silica;flame retardant;polyurethane sponge
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 16
·4655-4666
·
IF 4.478
Gao Tiemei,Lian Huiting,Cao Xuegong,Liu Bin,Wei Xiaofeng
Multifunctional catalytic performance plays a crucial role in bio-applications through the diversity and durability of artificial nanozymes. An effective synergy with sufficient accessible active sites and high specific surface area is a challenge for composite catalysts, especially to avoid uncontrollable aggregation and structural instability. Here, we fabricated a Cu n O/Au heterostructure dendrimer on copper foam (Cu n O/Au HD/CF) as dual functional catalytic nanozyme to achieve enzyme mimic cascade reactions for efficient colorimetric analysis. A highly porous CF skeleton–based CuO nanowire array (CuO NWA) with a large specific surface area supported an efficient load capacity to assemble sufficient Cu n O/Au HD by electrodeposition. The bimetallic Au-Cu nanozyme successfully achieved an oxidase-like and peroxidase-like cascade catalysis by a target-responsive sensing mechanism. Due to the confirmed catalytic performance of selectivity, anti-interference ability, and reproducibility, a Cu n O/Au HD/CF-based quantitative analytical method was developed for glucose detection with a wide linear range and considerable detection limit of 8.4 μM. The robust nonenzymatic catalytic strategy for colorimetric detection not only confirmed the dual functional catalytic activity of Cu n O/Au HD/CF, but also showed great potential for applications in clinical diagnostics and biochemical analysis. Graphical abstract
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Ying-Ming Li,Dan-Ping Zhu,Shuang-Lin Hu,Yun-Hong Jiao,Jian-Zhong Xu,De-Yi Wang
In order to design UPR composites with high mechanical property and improved flame retardancy, an organic-inorganic hybrid flame retardant (DA-Si-HNT) was fabricated by grafting silane coupling agent (KH560) and the phosphorus-nitrogen containing structure (DOPA-A, the production of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and adenine) on the surface of halloysite nanotube (HNTs). The UPR/DA-Si-HNT 15 composites exhibited significant improvements in tensile strength , tensile modulus , and flexural strength , with respective increases of 65.6 %, 140.6 %, and 80.2 % compared to neat UPR . These enhancements can be attributed to the enhanced compatibility and interfacial force between the flame retardants and the polymer matrix . Meanwhile, it passed the UL-94 V-0 rating at a limiting oxygen index (LOI) value of 34.5 %. The peak of heat release rate (PHRR) and total heat release (THR) decreased by 49.5 % and 43.5 % comparing to that of UPR, indicating a sharp decline in the heat hazard. Moreover, an obvious catalytic carbonization effect in the condensed phase accompanied with moderate gas-phase effect jointly improved flame retardancy of the UPR/DA-Si-HNT 15 composites.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 29
·期 2
·721-732
·
IF 2.961
Dai Jianfeng,Li Zhaokuan,Yu Rui,Su Hao,Wang Qing
The combination of transition metal compounds and carbon materials is considered effective in optimizing electrode material performance. In this work, some simple methods are used to embed bimetallic phosphides into carbon material frameworks to form heterostructures. The process includes the in situ growth of cobalt-based zeolitic imidazole frameworks on rGO, the formation of bimetallic hydroxides by Ni 2+ etching, and further high-temperature phosphating to form a NiCoP/rGO hollow nanocomposite. Benefiting from the synergistic effect between NiCoP and rGO, NiCoP/rGO-20 exhibits the best electrochemical properties, has a high specific capacity of 250.9 mAh g −1 at a current density of 1 A g –1 , and has good rate performance (62.7% retention at 10 A g –1 ). Furthermore, a hybrid supercapacitor was assembled with NiCoP/rGO-20 as the positive electrode and activated carbon (AC) as the negative electrode. The NiCoP/rGO-20//AC HSC device has a high energy density of 60.6 Wh kg –1 at a power density of 749 W kg –1 as well as excellent cycling stability with 83.7% capacitance retention after 10,000 cycles at 10 A g –1 . This work provides a new strategy for the development of high-performance energy storage composites.
研究领域:
材料科学
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能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 48
·25106-25113
·
IF 3.708
Rong-li Zhang,Sheng Xu,Jing Luo,Dong-jian Shi,Chen Liu,Xiao-ya Liu
Nanohybrids, comprising gold nanoparticles (Au NPs) and polymer NPs have attracted significant attention in recent years due to their excellent physical and chemical properties. In this work, a novel kind of nanohybrids based on Au NPs and biocompatible poly(γ-glutamic acid)-graft-3,4-dihydroxy-L-phenylalanine (γ-PGA-g-DA) NPs was conveniently achieved through a green and facile one-pot strategy. By simply adding HAuCl4·3H2O to the aqueous solution of γ-PGA-g-DA copolymer, the decrease of the pH value induced the self-assembly of γ-PGA-g-DA into NPs, during which Au3+ was adsorbed in the in situ formed NPs and spontaneously reduced to Au NPs by the dopamine moieties of γ-PGA-g-DA, leading to the formation of Au@γ-PGA-g-DA nanohybrids. In the reaction process, γ-PGA-g-DA was used as scaffold and reductant simultaneously, avoiding the use of extra toxic reducing reagents. Interestingly, the particle size and clustering of Au NPs in Au@γ-PGA-g-DA nanohybrids were varied with the loadings of HAuCl4·3H2O. This one-pot preparation process is very simple, fast, and completely based on the principles of green chemistry. Furthermore, the resultant biocompatible Au@γ-PGA-g-DA nanohybrids were used to detect L-tryptophan and exhibited a good analytical performance. The novel Au@γ-PGA-g-DA nanohybrids are a promising system for detecting the amino acids and biological species.
研究领域:
材料科学
·
生物医学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Yuan Wang,Liwei Yan,Youquan Ling,Ying Ge,Congshu Huang,Shengtai Zhou,Shuang Xia,Mei Liang,Huawei Zou
A uniformly dispersed epoxy/polydimethylsiloxane (PDMS) hybrid system was prepared through hydrosilylation and in-situ polymerization reaction. The obtained epoxy/PDMS coating possessed enhanced mechanical and adhesive properties. The hybrid structure of epoxy/PDMS was confirmed by FTIR, 1 H NMR, GPC and SEM, respectively. Results indicated that the tensile strength , elongation at break and shear strength of the epoxy-containing polydimethylsiloxane (EPS) modified PDMS (EPS-PDMS) were increased by 187 %, 185 % and 137 %, respectively, when compared to the pure PDMS. Besides, TGA analysis indicated that the initial degradation temperature of EPS-PDMS was well maintained when compared to that of pure PDMS. Therefore, the convenient strategy of in-situ formation of epoxy reinforcing phase with flexible long-chain siloxane into PDMS effectively integrated the advantages of two incompatible polymers. The prepared EPS-PDMS coatings with enhanced mechanical and adhesive properties show great potential applications in the aerospace and industrial fields as flexible thermal protection coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jian Wang,Zhenquan Wang,Zhiming Li,Naxing Liu,Yang Luo,Yuxiao Chu,Long Jiang,Fu-Gang Zhao,Kai Zhang,Xunshan Liu,Yongmiao Shen
Supercapacitor is an electrochemical energy-storage technology that can meet the green and sustainable energy needs of the future. However, a low energy density was a bottleneck that limited its practical application. To overcome this, we developed a heterojunction system composed of two-dimensional (2D) graphene and hydroquinone dimethyl ether- an atypical redox-active aromatic ether. This heterojunction displayed a large specific capacitance (Cs) of 523 F g −1 at 1.0 A g −1 , as well as good rate capability and cycling stability. When assembled in symmetric and asymmetric two-electrode configuration, respectively, supercapacitors can work in voltage windows of 0 ∼ 1.0 V and 0 ∼ 1.6 V, accordingly, and exhibited attractive capacitive characteristics. The best device can deliver an energy density of 32.4 Wh Kg −1 and a power density of 8000 W Kg −1 , and suffered a small capacitance degradation. Additionally, the device showed low self-discharge and leakage current behaviors during long time. This strategy may inspire exploration of aromatic ether electrochemistry and pave a way to develop electrical double-layer capacitance (EDLC)/pseudocapacitance heterojunctions to boost the critical energy density.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small Methods
·
2024
·
IF 10.7
Jiayao Fan,Lei Wang,Xing Xiang,Ying Liu,Naien Shi,Yue Lin,Dongdong Xu,Jiadong Jiang,Yu Lai,Jianchun Bao,Min Han
Transition metal phosphides (TMPs) and phosphates (TM-Pis) nanostructures are promising functional materials for energy storage and conversion. Nonetheless, controllable synthesis of crystalline/amorphous heterogeneous TMPs/TM-Pis nanohybrids or related nanoarchitectures remains challenging, and their electrocatalytic applications toward overall water splitting (OWS) are not fully explored. Herein, the Ni 2 P nanocrystals anchored on amorphous V-Pi nanosheet based porous flower-like nanohybrid architectures that are self-supported on carbon cloth (CC) substrate (Ni 2 P/V-Pi/CC) are fabricated by conformal oxidation and phosphorization of pre-synthesized NiV-LDH/CC. Due to the unique microstructures and strong synergistic effects of crystalline Ni 2 P and amorphous V-Pi components, the obtained Ni 2 P/V-Pi/CC owns abundant active sites, suitable surface/interface electronic structure and optimized adsorption-desorption of reaction intermediates, resulting in outstanding electrocatalytic performances toward hydrogen and oxygen evolution reactions in alkaline media. Correspondingly, the assembled Ni 2 P/V-Pi/CC||Ni 2 P/V-Pi/CC electrolyzer only needs an ultralow cell voltage (1.44 V) to deliver 10 mA cm −2 water-splitting currents, exceeding its counterparts, recently reported bifunctional catalysts-based devices, and Pt/C/CC||IrO 2 /CC pairs. Moreover, the Ni 2 P/V-Pi/CC||Ni 2 P/V-Pi/CC manifests remarkable stability. Also, such device shows a certain prospect for OWS in acidic media. This work may spur the development of TMPs/TMPis-based nanohybrid architectures by combining structure and phase engineering, and push their applications in OWS or other clean energy options.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）