APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Jianyu Mao,Wei Jiang,Junjun Gu,Shuai Zhou,Yue Lu,Tan Xie
In this article, magnetic P (St-DVB)/Fe 3 O 4 microspheres with hollow and porous structure were successfully fabricated by a seed swelling polymerization process for fast and selective absorption of oils from water surface. These microspheres, with unsinkable, magnetic, hydrophobic and oleophilic properties, were used to absorb different oils up to 8.42 times of the particles’ weight while repelling water completely. More importantly, the oil-absorbed microspheres could be removed from water surface efficiently via introducing an external magnetic field. This material also shows excellent reusability after washing with ethanol and the oil-absorption capacity of the material was not sharply reduced even after the 10th cycle. The discoveries presented in this study might provide a low-cost, effective, and environmental-friendly approach for the clean-up of oils and organic solvents on the water.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 2
·期 9
·2968-2976
·
IF 0
Zhen Xu,Dehua Xiong,Huan Wang,Wenjun Zhang,Xianwei Zeng,Liqun Ming,Wei Chen,Xiaobao Xu,Jin Cui,Mingkui Wang,Satvasheel Powar,Udo Bach,Yi-Bing Cheng
In this paper, we report the successful hydrothermal synthesis of CuGaO2 nanoplates with a critically small size and deposition methods to fabricate effective p-type semiconductive photocathodes in dye-sensitized solar cells (DSCs). Based on an efficient P1 dye and an iodide electrolyte, the optimal CuGaO2 photocathode has achieved remarkably high photocurrent density, up to 2.05 mA cm−2. To the best of our knowledge, this is the highest achieved by nanocrystalline p-type semiconductors besides NiO. The light harvesting, charge collection in CuGaO2 and NiO based DSCs have been compared. Owing to size control of the CuGaO2 nanoplates and subsequent mechanical pressing for photocathode film deposition, the light harvesting efficiency of the CuGaO2 photocathode is greatly increased to a comparable level to that of the NiO reference. Another noteworthy feature is the remarkably high charge collection efficiency of the CuGaO2 photocathode, which should benefit from the nature of delafossite oxides with a high conductivity leading to a much higher hole diffusion coefficient in the DSC system. The open-circuit voltage is 199.3 mV, about twice as high as that of the NiO reference, benefiting from the valence band position shifting from −5.15 eV for NiO to −5.29 eV for CuGaO2versus the vacuum level.
✓ 已验证
产品关联
DOI
CARBOHYDRATE POLYMERS
·
2013
·
IF 3.479
Yiming Zhou,Shiyu Fu,Liangliang Zhang,Huaiyu Zhan
Superabsorbents based on carboxylated cellulose nanofibrils (CCNFs) and carboxymethyl cellulose-g-poly(acrylic acid-co-acrylamide) were synthesized. A series of experiments were performed to evaluate the influence of factors such as CCNFs amount, solution pH, temperature, salt solution type and concentration on the swelling behaviors of the hydrogels. The water uptake of the hydrogels strongly depended on the CCNF content, the swelling capacity in distilled water increased dramatically from 245.8 to 458.7 g/g with the addition of CCNFs up to 2.5 wt%. Furthermore, the incorporation of CCNFs improved salt resistance properties of the hydrogels with slower deswelling rate and higher water retention capacity at deswelling equilibrium. Besides, the CCNF nanocomposite hydrogels presented better responsive behavior in relation to pH presence and showed an increase in water retention capacity at various temperatures. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) were employed to examine the structure and morphologies of the prepared superabsorbent hydrogels.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
·
2014
·
IF 8.312
Xiaoying Wang,Yihang Chen,Fatima Zohra Dahmani,Lifang Yin,Jianping Zhou,Jing Yao
An amphiphilic carboxymethyl chitosan-quercetin (CQ) conjugate was designed and synthesized for oral delivery of paclitaxel (PTX) to improve its oral bioavailability by increasing its water solubility and bypassing the P-gp drug efflux pumps . CQ conjugate had low critical micelle concentration (55.14 μg/mL), and could self assemble in aqueous condition to form polymeric micelles (PMs). PTX-loaded CQ PMs displayed a particle size of 185.8 ± 4.6 nm and polydispersity index (PDI) of 0.134 ± 0.056. The drug-loading content (DL) and entrapment efficiency (EE) were 33.62 ± 1.34% and 85.63 ± 1.26%, respectively. Moreover, PTX-loaded CQ PMs displayed similar sustained-release profile in simulated gastrointestinal fluids (pH 1.2/pH 6.8) and PBS (pH 7.4). In situ intestinal absorption experiment showed that PTX-loaded CQ PMs significantly improved the effective permeability of PTX as compared to verapamil ( P < 0.01). Likewise, PTX-loaded CQ PMs significantly enhanced the oral bioavailability of PTX, resulting in strong antitumor efficacy against tumor xenograft models with better safety profile as compared to Taxol ® and Taxol ® with verapamil. Overall, the results implicate that CQ PMs are promising vehicles for the oral delivery of water-insoluble anticancer drugs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2014
·Vol. 29
·期 22
·2657-2666
·
IF 1.815
Xiao Hu,Y.C. Chan
To reinforce the reliability issue brought by excessive interfacial reaction with the dimensional scale-down of electronic device, an electroless Ni–P–ZrO2 (17.5 at.% of P) composite coating was developed as the under bump metallization (UBM) for lead-free solder interconnect. ZrO2 nanoparticles were proved to be homogeneously distributed and helped improve wetting ability of the layer. Both Sn–3.5Ag/Ni–P–ZrO2 and Sn–3.5Ag/Ni–P solder joints were prepared and aged at various conditions to study the interfacial reaction. Growth of intermetallic compounds (IMCs) without serious spalling in solder/Ni–P–ZrO2 joint was slowed down because of the barrier property of incorporation of ZrO2 nanoparticles, which blocked the diffusion of Ni and Cu atoms. Based on the IMC growth, the activation energy of solder/Ni–P–ZrO2 was estimated to be higher than that of plain solder joint. The top-view of IMCs demonstrated a much finer grain size compared with that of solder/Ni–P joint. A reactive diffusion-induced compound formation mechanism was proposed to address the microstructural evolution in detail. Moreover, solder/Ni–P–ZrO2 joint demonstrated higher shear strength than did solder/Ni–P joint for different aging durations. The fracture surface of solder/Ni–P joint after shear test showed ductile transition failure, with big dimples and plastic deformation.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Qin Wang,Zhuo Chen,Sufen Deng,Shaokun Song,Chuanxi Xiong,Lijie Dong
The non-flow property for rigid-rod polymers remains a serious problem that limits their application on a massive scale. Based on a water-in-oil microemulsion method and one pot in situ “grafting to” strategy, a series of novel poly(p-phenylene terephthalamide)-based materials containing controllable graft density of long-chain tertiary amine are prepared. Consequently, the materials’ rheology behaviors are controllable at the level of an order of magnitude and are well-matched with the tunable condensed state structures. Several significant micro-structures of such liquid-like poly(p-phenylene terephthalamide)-based materials are obtained. Additionally, the excellent solubility conforms to the liquid crystal states, solving the key problem of only dissolving concentrated sulfur acid. Additionally, we further investigated the liquid crystal states in different solvents, mass ratios and temperature. This state-of-the-art material with its established property-structure relationship, especially regarding how the structure determines the rheology behavior and solubility, can be treated as a prototype for guiding future research on ionic liquids and in the field related to functional polymer science and technology . Furthermore, the dielectric properties of f -PPTA/PVDF composite membranes have been investigated and show great potential for use in capacitor applications.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Weicheng Xu,Jianzhang Fang,Ximiao Zhu,Zhanqiang Fang,Chaoping Cen
A series of novel p−n junction photocatalysts BiOI/Bi 2 Sn 2 O 7 (BiOI/BSO) were successfully fabricated via a facile hydrothermal method. The phase structures, morphologies and optical properties of the as-prepared samples were studied by XRD, TEM, HRTEM, BET, XPS, UV–vis DRS and photoluminescence (PL) spectroscopy. The results showed that BiOI/BSO heteronanostructures displayed much higher photocatalytic activity than pure BSO and BiOI for the degradation of rhodamine B (RhB). The best photocatalytic activity of BiOI/BSO with almost 99.9% RhB degradation situated at molar percentage ratio of 4% after 6 h irradiation. The enhanced photocatalytic performance of BiOI/BSO could be mainly attributed to the formation of the heterojunction between p-BiOI and n-BSO, which effectively restrains the recombination of photoinduced electron–hole pairs. Moreover, the study of radical scavengers affirmed that h + and •O 2 − were the primary reactive species for the degradation of RhB.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
Junlei Zhang,Zhen Ma
Ag 3 VO 4 /BiOBr n-p heterojunctions were prepared via chemical deposition. Ag 3 VO 4 /BiOBr consists of Ag 3 VO 4 nanoparticles with sizes ranging from several to tens nanometers and flower-like BiOBr microspheres composed of irregular nanosheets. The photocatalytic performance of Ag 3 VO 4 /BiOBr and relevant samples was investigated in the visible-light-driven degradation of Rhodamine B (RhB), methylene blue (MB), methyl orange (MO), and tetracycline hydrochloride (TC). Ag 3 VO 4 /BiOBr heterojunction with a BiOBr/Ag 3 VO 4 mass ratio of 10% was more active than a physical mixture of Ag 3 VO 4 and BiOBr, showing the importance of forming the heterojunction. Photogenerated holes (h + ) and superoxide radical anions ( O 2 − ) were found to be the primary active species. A possible mechanism for the enhanced photocatalytic performance was proposed.
✓ 已验证
产品关联
DOI
TETRAHEDRON
·
2017
·
IF 2.651
Shi-Yuan Liu,Lin-Yan Xu,Chun-Yu Liu,Zhi-Gang Ren,David James Young,Jian-Ping Lang
An efficient catalytic system containing [RuCl 2 (η 6 -p-cymene)] 2 and one P,N ligand, N-diphenylphosphino-2-aminopyridine ( L1 ) was loaded in catalyzing the alkylation of ketones with primary alcohols for a diverse array of substrates. Other five P,N ligands based on pyridin-2-amine and pyrimidin-2-amine were also examined in this reaction to explore the influence of steric hindrance and electronic effects. Monitoring by 1 H NMR and ESI-MS reveals a stable cationic L1 -coordinated ruthenium hydride intermediate, identified as [Ru(η 6 -p-cymene)(κ 2 - L1 )H] + . Organic intermediates consistent with a three-step dehydrogenation , alkylation and hydrogenation pathway were also observed. The final step in this reaction, the ruthenium-catalysed transfer hydrogenation reduction of α,β-unsaturated ketone with benzyl alcohol was performed separately.
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Xiaoxia Ye,Jian Huang,Yuqing Zhang,Yi Lin,Yuancai Lv,Chunxiang Lin,Liang Song,Guifang Yang,Minghua Liu
Para-arsanilic acid ( p -ASA) is widely used as a feed additive, making it a pervasive environmental pollutant. Due to its migratory and transformative nature, p -ASA can easily convert into more toxic inorganic arsenic during its migration, thereby increasing the ecological burden and posing a threat to human health. Efficient removal of p -ASA from water is crucial for mitigating arsenic contamination. Efficient removal of p -ASA from water is crucial for mitigating arsenic contamination. This study introduced zirconium-loaded collagen fiber membrane (CFM Zr), a novel, sustainable membrane adsorption material synthesized by retanning collagen fiber membranes (CFM) with zirconium (Zr). Leveraging the physicochemical properties of CFM and the strong affinity of Zr for p -ASA, CFM-Zr achieved highly efficient p -ASA removal. The resulting membrane was made entirely from green, low-carbon and recyclable raw materials, achieving sustainable removal of p -ASA while realizing the concept of treating waste with waste for environmental recovery. Remarkably, the retanning with zirconium significantly enhanced the Zeta potential of CFM Zr, strengthening its electrostatic attraction to p -ASA, with a maximum adsorption capacity of 289.02 mg·g −1 , which was 19.72 times higher than that of the CFM before retanning (13.95 mg·g −1 ). Its adsorption rate constant was 12.54 mg·g −1 ·min −1 . Moreover, CFM-Zr showed good reusability and exhibited electrostatic adsorption and metal coordination effects on the “organic” parts (-OH, -NH 2 ) and “inorganic” parts (As O) of p -ASA, effectively removing it. This work provided a promising bio-based material for water purification, promoted the sustainable utilization of leather industry waste, and offered significant advancements in environmental remediation and resource recovery.
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 20
·5083
·
IF 3.1
Wen Huang,Caiyuan Liu,Xin Fang,Hui Peng,Yonggang Yang,Yi Li
This work presents a facile way to fabricate a polymer/ceramics composite gel electrolyte to improve the overall properties of lithium-ion batteries. Lithium salt-grafted silica was synthesized and mixed with P(VDF-HFP) to produce a nanofiber film by the electrostatic spinning method. After coating a layer of SiO2onto the surface of nanofibers through a sol-gel method, a composite nanofiber film was obtained. It was then immersed in plasticizer until saturation to make a composite gel electrolyte film. Electrochemical test results showed that the obtained gel electrolyte film shows high thermal stability (~450 °C), high ionic conductivity of 1.3 × 10−3S cm−1at 25 °C and a lithium-ion transference number of 0.58, and superior cycling stability, providing a new direction for manufacturing secondary batteries with higher safety and performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 45
·31518-31525
·
IF 10.7
Qiyan Sun,Yu Miao,Ruixue Zhang,Guang-Rui Xu,Chuanfang Zhang,Kang Liu,Zexing Wu,Lei Wang
Water electrooxidation in proton exchange membrane (PEM) water electrolyzers has been considered to be a four-electron pathway mechanism, which leads to inherent sluggish kinetics that severely limits the scalable production of high-purity H2. Herein, cobalt phosphide/iron phosphide (Co2P/FeP) nanosheets with electron redistribution through aerogel-assisted and gas-phase phosphorization strategies have been reported. Benefiting from the unique nanosheet structure and electron redistribution induced by p–d hybridization interaction, the as-obtained Co2P/FeP nanosheets display outstanding alkaline oxygen evolution reaction (OER) performance. Co–P and Fe–P charge bridges trigger p–d orbital hybridization between the transition metal and P elements, which downshifts the d-band center of Co2P/FeP nanosheets and accelerates the formation of *OOH with a lower energy barrier that can expedite the water electrooxidation process with an overpotential of 257 mV to reach the 10 mA cm−2 current density and a Tafel slope of 39.6 mV dec−1. This work provides a deep insight into understanding the remarkable OER properties of transition metal phosphates by electron redistribution.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）