Materials Today Communications
·
2020
·
IF 2.678
Fang Lu,Yurong Ma,Huibo Wang,Mengling Zhang,Bo Wang,Yue Zhang,Hui Huang,Fan Liao,Yang Liu,Zhenhui Kang
Multidrug-resistant bacterial infections are one of the most serious public health threats in the world, which bring an urgent need to discover novel antibiotics with enhanced broad-spectrum antibacterial activity . Curcumin , as a widely used natural product , has good anti-inflammatory and antioxidant properties; while, the bioavailability, bioactivity and antibacterial activity design are limited by its poor water-solubility. Here, to improve the bioactivity of curcumin, we show the fabrication of highly water-solvable carbon dots (CDs) by hydrothermal method from citric acid and curcumin. The CDs possess excellent broad-spectrum antibacterial activity and antibiofilm activity because they can do damage to the bacterial walls when they get into the bacteria. The bactericidal efficiency of CDs (375 μg/mL) achieves up to 100 % for Gram-negative bacteria ( Escherichia coli and Pseudomonas aeruginosa ). Additionally, for Gram-positive bacteria ( Staphylococcus aureus and Bacillus subtilis ), the bactericidal efficiency reaches 80 %. In addition, these CDs also can completely inhibit the formation of biofilm for the Gram-negative bacteria and the Gram-positive bacteria. This work has a significant meaning in studying new antibacterial nanomaterials derived from natural product and the treatment of infections.
研究领域:
纳米医学
·
微生物学
·
药剂学
·
天然产物化学
·
感染性疾病
·
生物材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhuanghe Ren,Xin Zhang,Zhenguo Huang,Jianjiang Hu,Yangzhong Li,Shiyou Zheng,Mingxia Gao,Hongge Pan,Yongfeng Liu
Nanosized titanium compounds are particularly effective in catalyzing hydrogen cycling by NaAlH 4 . Titanium hydride (TiH 2 ), as a catalyst, is highly interesting since it contributes hydrogen in addition to active Ti. However, it has been challenging to fabricate nanosized TiH 2 due to the strong affinity of Ti with oxygen. Herein, TiH 2 nanoflakes with a lateral size of ~10 nm and thickness of ~1 nm are successfully synthesized through a novel facile one-pot solvothermal process. In an anhydrous THF solution, LiH reacts with TiCl 4 rapidly at 100 °C forming TiH 2 and LiCl. The newly formed TiH 2 nucleates and grows epitaxially on the graphene surface due to the well-matched lattice parameters, giving rise to the formation of TiH 2 nanoflakes. Both theoretical calculations and experiments reveal the generation of Cl· radicals and unsaturated C C bonds when TiCl 4 reacts with THF, which promotes the formation of TiH 2 . The nanoflake-like TiH 2 on graphene enables an outstanding hydrogen storage performance of NaAlH 4 , i.e., full dehydrogenation at 80 °C and hydrogenation at 30 °C and under 100 bar H 2 , with a practical hydrogen capacity of 4.9 wt%, which has been never reported before.
研究领域:
材料科学
·
纳米化学
·
能源化学
·
固态储氢
·
催化化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 7
·9289-9296
·
IF 3.83
Mohamed S. Selim,Ping Jing Mo,Yu Ping Zhang,Zhifeng Hao,Hongli Wen
Ceramic one-dimensional particles are fascinating nanomaterials for sustainable future industries. Nanorods of γ-Al 2 O 3 with single crystallinity and 10 nm diameter regime were newly developed through solvothermal procedure between AlCl 3 ·6H 2 O, NaOH, and sodium dodecylbenzene sulfonate at 200 °C for 24 h. Controlling the pH values, reaction time, temperature, and effect of surfactant during the solvothermal reaction was studied to control the morphology and structure of nanorods. The solvothermal procedure for preparing γ-AlOOH nanorods followed lamellar growth, assembly, and ripening routes. The γ-AlOOH nanorods were converted to γ-Al 2 O 3 through calcination reaction at 500 °C for 3 h. The produced γ-Al 2 O 3 nanorods were 10 nm average width, 100–200 nm average length, and exposed with [101] orientation and a linear structure. FTIR, HRTEM , FESEM, XRD , and X-ray photoelectron spectroscopy methods were used for characterizing the prepared nanomaterials . New features and applied fields are predictable for the designed γ-AlOOH and γ-Al 2 O 3 nanorods.
研究领域:
无机化学
·
纳米材料科学
·
溶剂热合成
·
陶瓷纳米材料
·
材料化学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2013
·Vol. 34
·期 16
·1319-1324
·
IF 4.929
Chaohong Zhang,Ci Song,Wantai Yang,Jianping Deng
This communication reports the first gold nanoparticles (NPs) chirally functionalized with optically active helical substituted polyacetylene (the resulting hybrid particles are defined as Au@PPA NPs). The novel nanoparticles consist of gold as core and optically active helical poly( N -propargylamide) as shell and show considerable optical activity derived from helical poly( N -propargylamide) chains with predominantly one-handed screw sense. The Au@PPA NPs are prepared by a three-step approach: i) a thiol-containing N -propargylamide monomer [M th , HC≡CCH 2 NHCO(CH 2 ) 10 SH] is synthesized and characterized with FTIR and 1 HNMR spectroscopy and elemental analysis; ii) a copolymer (poly(M th - co -M ch )) was prepared by starting from monomer M th and another chiral N -propargylamide monomer (M ch ); poly(M th - co -M ch ) formed helical conformations and showed optical activities; and, iii) Au@PPA NPs are prepared from hydrogen tetrachloroaurate (III) and poly(M th - co -M ch ) through a one-spot procedure by using LiBH 4 as reducing agent. The as-obtained hybrid nanoparticles are characterized by FTIR spectroscopy, TEM, UV-vis absorption and circular dichroism (CD) techniques. UV-vis and CD measurements demonstrated the remarkable optical activity of the Au@PPA NPs. More interestingly, the Au@PPA NPs show much stronger UV-vis and CD sigals when compared to the corresponding orginal helical copolymer, poly(M th - co -M ch ). The chiral hybrid nanoparticles demonstrate different absorption toward (R)-(+)- and (S)-(−)-1-phenylethylamines, preferentially adsorbing the (S)-isomer.
研究领域:
纳米医学
·
生物材料
·
分子识别
·
药物递送
·
化学生物学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 49
·期 11
·18776-18785
·
IF 5.2
Jiaxu Cheng,Siwei Jiang,Jiahong Fan,Jun Yao,Ning Du,Xue Li,Ding Wang,Peng Dong,Zhongren Zhou,Yingjie Zhang
Molten salt electrolytic synthesis of silicon is identified as a potential industry method due to its thorough deoxidization of oxide and short-flow synthetic progress. However, figuring out a more efficient and sustainable strategy for the increase of the reduction process as well as the control of product morphology still needs endless research. In this study, benefiting from the high electrical conductivity of metallic silver and the easy separation of silver from silver-silicon alloys during the electrolysis of SiO 2 , metallic silver was introduced to electric-catalyze the production of silicon. Firstly, metallic silver was introduced into the silica matrix by a simple silver mirror reaction. Secondly, the mixed Ag\SiO 2 precursor was located at the cathode for molten salt electrolysis . Finally, silicon nanowires were herein achieved in molten NaCl–CaCl 2 . Mechanisms of metal Ag played during the electric-polarization process of silica and the electrochemical nucleation of silicon were further analyzed by X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Field-Emission Scanning Electron Microscope (FESEM), Transmission Electron Microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Raman spectra . The results demonstrate that Ag helps construct Si nanowires via a classic Ag-Si binary alloy-droplet process and provided quantitative guidance for the large-yield production of silicon nanowires via adding 0.08–0.17 g Ag versus 1 g SiO 2 , controlling the temperature at 850–900 °C and electrolysis voltage at 2.6–2.8 V (2.6V at first 1 h and 2.8V at last 5 h). The synthesized silicon nanowires present two types of linear structures based on two three-phase interlines (3PIs) models and a streamed long-straight nanowire is observed.
研究领域:
材料科学
·
纳米科技
·
电化学
·
无机化学
·
能源材料
·
半导体材料
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Ziqi Zhu,Pei Yang,Minzhi Chen,Tao Zhang,Yizhong Cao,Wei Zhang,Xiaoyan Zhou,Weimin Chen
Carbon dots (CDs) have sparked tremendous attention owing to their unique properties and great potential in various fields. Herein, novel amphiphilic CDs (ACDs) were synthesized solvothermally by microwave heating a mixture of xylose and ethylenediamine in N, N-dimethylacetamide. The xylose-derived ACDs were monodisperse nanoparticles with an average diameter of about 1.81 nm, and exhibited excitation-dependent emission behavior in both aqueous and several common organic solvents . Furthermore, the synthesized ACDs can be uniformly dispersed into polyvinyl alcohol (PVA) solution to fabricate transparent luminescent composites, the as-prepared PVA/ACDs composites not only exhibited excellent fluorescence with excitation-dependent emission performance, but also achieved water-induced shape memory behavior. The intrinsic reason and pH sensitivity of shape recovery were investigated, the results confirmed that a faster shape recovery can be obtained in water at pH 4 within 180 s. Further investigation illustrated that the sensitivity of additional hydrogen bonding between PVA and ACDs to the water molecular was highly related to the shape recovery of the luminescent composite. The green synthesis route for xylan-derived ACDs and fabrication of smart luminescent composite will open many possibilities for the valuable application of low-cost biomass.
研究领域:
纳米材料学
·
高分子科学
·
生物医学工程
·
功能材料
·
绿色化学
·
智能材料
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Mingyang Gao,Wen Zhang,Zhuo Cao,Manzhang Xu,Wu Zhao,Zhiyong Zhang
At the 2022 Beijing Winter Olympics, the concept of sustainable development impressed the world. This study is supported by the concept of ecological protection and conservation. The easily available plastic bottled Coca-Cola® was innovatively proposed as a low-cost solvent to greenly exfoliate bulk tungsten disulfide (WS 2 ). First, an overview of two-dimensional (2D) WS 2 was given, summarizing the related reports on its structures and synthesis. Taking into account the yield of 2D flakes, the optimal fabrication environment was figured out. The related characterizations of the cola-synthetic WS 2 were studied. This work opens up a new strategy for the inexpensive and green exfoliation of 2D crystals with a high yield.
研究领域:
材料科学
·
纳米科技
·
绿色化学
·
无机合成
·
二维材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Shuai Ma,Lifeng Dong,Hongzhou Dong,Jie Wang,Yingjie Chen,Beili Pang,Jianguang Feng,Liyan Yu,Mei Zhao
We concretely report feasible synthesis procedures of colloidal Cu 2 ZnSn(S 1- x ,Se x ) 4 -Au (CZTSSe-Au) nano-heterostructured composites, and creatively employ them as the counter electrodes (CEs) of all-solid-state solar cells with inorganic CsSnI 2.95 F 0.05 perovskite hole conductor. Acquired optical characterization indicates that integration of noble metal nanoparticles with cuprum-chalcogenide could heighten light absorption within visible-band due to localized surface plasmon resonance (LSPR) generated by Au, and the forbidden gap of nanocomposites gets adjustment accordingly. It is demonstrated that this novel photocathode alternative with favorable conductivity can not only match the energy level within the device band structure construction, but also restrain recombination so that accelerate charge transfer and extraction occurring on the photocathode. The photocurrent and photoelectric conversion efficiency (PCE) of cells conjugating CZTS-Au photocathodes turn to be respectively 43% and 25% higher than those using pure CZTS. Moreover, it has been demonstrated that CZTS-Au, coupling very well with inorganic perovskite, owns comparable electrocatalytic performance and even higher output photocurrent with respect to platinum CEs, which portends a potential substitution for conventional costly photocathodes. A comprehensive analysis on impedance spectroscopy data is subsequently carried out for the sake of deep understanding charge accumulation and transfer response at CsSnI 2.95 F 0.05 /CE interface, attempting to orient further optimization of device performance.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2012
·Vol. 47
·期 11
·3277-3282
·
IF 2.105
Jing Bo Zhang,Xiao Ning Li,Shou Li Bai,Rui Xian Luo,Ai Fan Chen,Yuan Lin
Well-crystallized one-dimensional (1D) SnO 2 nanobelts were in situ prepared using a simple water-assisted chemical vapor deposition (CVD) method. The small Sn particles with Au-modifications were used as source materials instead of big size Sn grains to ensure the high yield of SnO 2 belts. The Au layer was modified on the small Sn particles by treating Sn powders in HAuCl 4 solution combined with the UV irradiation. The as-prepared SnO 2 nanobelts were characterized by SEM, HRTEM, XRD, EDS and XPS. These results indicate that the growth temperature plays an important role in controlling the length-to-width ratio of nanobelts. The length-to-width ratio decreases with the growth temperature from 850 °C to 1000 °C. The nanobelts prepared at 850 °C shows a single-crystalline tetragonal rutile phase with a high length-to-width ratio (approximately tens of microns in length and 40–70 nm in width). However, below 850 °C, nanobelts cannot be formed. The as-prepared nanobelts exhibited excellent sensing properties compared with SnO 2 nanoparticles and high sensing selectivity towards NO 2 . The high sensing selectivity to NO 2 is attributed to the oxygen vacancies presenting in the as-prepared nanobelts.
研究领域:
材料科学
·
纳米技术
·
传感器学
·
无机化学
·
半导体材料
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2016
·Vol. 7
·期 8
·1602149
·
IF 15.23
Shanshan Yao,Jiang Cui,Ziheng Lu,Zheng-Long Xu,Lei Qin,Jiaqiang Huang,Zoya Sadighi,Francesco Ciucci,Jang-Kyo Kim
Carbon-coated van der Waals stacked Sb 2 S 3 nanorods (SSNR/C) are synthesized by facile hydrothermal growth as anodes for sodium ion batteries (SIBs). The sodiation kinetics and phase evolution behavior of the SSNR/C anode during the first and subsequent cycles are unraveled by coupling in situ transmission electron microscopy analysis with first-principles calculations. During the first sodiation process, Na + ions intercalate into the Sb 2 S 3 crystals with an ultrafast speed of 146 nm s −1 . The resulting amorphous Na x Sb 2 S 3 intermediate phases undergo sequential conversion and alloying reactions to form crystalline Na 2 S, Na 3 Sb, and minor metallic Sb. Upon desodiation, Na + ions extract from the nanocrystalline phases to leave behind the fully desodiated Sb 2 S 3 in an amorphous state. Such unique phase evolution behavior gives rise to superb electrochemical performance and leads to an unexpectedly small volume expansion of ≈54%. The first-principles calculations reveal distinctive phase evolution arising from the synergy between the extremely low Na + ion diffusion barrier of 190 meV and the sharply increased electronic conductivity upon the formation of amorphous Na x Sb 2 S 3 intermediate phases. These findings highlight an anomalous Na + ion storage mechanism and shed new light on the development of high performance SIB anodes based on van der Waals crystals.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固态物理
·
计算材料学
✓ 已验证
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2019
·Vol. 13
·期 7
·1900063
·
IF 3.729
Di Wu,Jiao Shi,Xiaoming Zheng,Jinxin Liu,Weidong Dou,Yongli Gao,Xiaoming Yuan,Fangping Ouyang,Han Huang
One-dimensional (1D) atomically thin crystals have attracted considerable interest due to their unique properties and potential applications. Herein, the chemical vapor deposition (CVD) growth of molybdenum disulfide (MoS 2 ) nanoribbons on sapphire(0001) supported monolayer MoS 2 flakes without catalysts as well as the characterizations by means of Raman and photoluminescence (PL) spectroscopy, optical microscopy (OM), atomic force microscopy (AFM), and scanning transmission electron microscopy (STEM). The Raman and PL results is reported, as well as OM images reveal that such MoS 2 nanoribbons grow on monolayer MoS 2 flakes. STEM and selected area electron diffraction (SAED) results reveal that they are grown along the 〈 10 1 ¯ 0 〉 direction with atomically sharp edges. Controlled experiments show that the deficiency of sulfur vapor at the beginning of growth induced 1D MoO x S 2− x crystals as precursors. The subsequent sulfurization changes them into MoS 2 nanoribbons. These findings provide a facile approach to MoS 2 nanoribbons and enrich the horizon of the preparation of nanostructured transition metal dichalcogenides.
研究领域:
材料科学
·
纳米科技
·
表面科学
·
凝聚态物理
·
低维材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Yanwei Sun,Chunshan Song,Xinwen Guo,Sungwon Hong,Jungkyu Choi,Yi Liu
Metal-organic framework (MOF) membranes have received increasing attention due to their unprecedented potential for energy-efficient gas separation. Compared with other MOF materials (like ZIF), fabrication and microstructural manipulation of high-performance Ti-MOF-based membranes, although being very attractive due to their excellent chemical and thermal stability, remained relatively less investigated due to the limitations of available titanium sources and heating modes. In this study, different Ti sources (TPOT, TiS 2 , and MXene) and heating modes (conventional heating, multi-mode microwave heating, and single-mode microwave heating) were examined for the preparation of NH 2 -MIL-125 membranes showing diverse microstructures and gas separation performances. The present work revealed that for the first time, MXene , the new two-dimensional Ti carbide , could be used as Ti source for synthesizing MOF membranes. The best performing NH 2 -MIL-125 membranes, which were obtained with TiS 2 as the metal source under single-mode microwave heating, exhibited the highest H 2 /CO 2 selectivity (ca. 17.2) as well as considerable H 2 permeance (1.7 × 10 −7 mol m −2 s −1 Pa −1 ), owing to an enhanced non-thermal effect of single-mode microwave heating and balanced dissolution rate of TiS 2 .
研究领域:
材料科学
·
膜分离技术
·
化学工程
·
纳米材料
·
气体分离
·
可持续能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）