Materials
·
2018
·Vol. 11
·期 7
·1225
·
IF 2.467
Shuai Hu,Zhenyu Chen,Xingpeng Guo
A novel and simple method to improve the corrosion resistance of copper by constructing a three-dimensional (3D) 1-dodecanethiol self-assembled monolayer (SAM) in 3.5% NaCl solution is reported in this study. Several drops of 1% H3PO4solution are thinly and uniformly distributed on copper surface to form a 3D nanostructure constituted by Cu3(PO4)2nanoflowers. The anticorrosion properties of 1-dodecanethiol SAM on copper surface and on copper surface that is treated with H3PO4solution were evaluated. Results demonstrated that 1-dodecanethiol SAM on bare copper surface exhibits good protection capacity, whereas a copper surface that is pretreated with H3PO4solution can substantially enhance the corrosion resistance of 1-dodecanethiol SAM.Keywords:copper;phosphoric acid;3D nanostructures;1-dodecanethiol SAM
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Gui-Shi Liu,Jing-Shen Qiu,Duo-Hua Xu,Xianzhong Zhou,Dingyong Zhong,Han-Ping D. Shieh,Bo-Ru Yang
We propose a versatile yet practical transferring technique to fabricate a high performance and extremely stable silver nanowire (AgNW) transparent electrode on arbitrary substrates. Hydroxylated poly(ethylene glycol) terephthalate (PET) or poly(dimethylsiloxane) (PDMS) deposited with AgNWs was selectively decorated to lower its polar surface energy, so that the AgNWs were easily and efficiently transferred into an epoxy resin (EPR) as a freestanding film (AgNWs–EPR) or onto various substrates. The AgNWs–EPR capped with alkanethiolate monolayers exhibits high conductivity, low roughness, ultraflexibility, and strong corrosion resistance. Using the transferring process, AgNWs–EPR was successfully constructed on rough, adhesive, flimsy, or complex curved substrates, including PET, thin optically clear adhesive, papers, a beaker, convex spherical PDMS, and leaves. A flexible touch panel enabling multitouch and a curved transparent heater on a beaker were first fabricated by using the composite film. These demonstrations suggest that the proposed technique for AgNWs is a promising strategy toward the next generation of flexible/portable/wearable electronics.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ACS Omega
·
2020
·
IF 2.87
Xiaomei Qin,Shihao Yang,Yapei Chen,Xiaoyun Qin,Jianbo Zhao,Wenjun Fang,Dan Luo
Palladium nanoparticles, which were prepared by modified hyperbranched polyglycerol (mHPG) as stabilizers, can be dispersed well in nonpolar organic solvents and form highly stable nanofluids. The influences of three mHPG products modified with cyclohexanethiol (CSHPG), dodecanethiol (DSHPG), and octadecanethiol (OSHPG) on the preparation and stability of the palladium nanoparticles were investigated. The stability and thermal conductivity enhancement of the hydrocarbon-based nanofluids with Pd@mHPG (Pd@CSHPG, Pd@DSHPG, and Pd@OSHPG) compared to the corresponding base fluid were investigated at different temperatures. The average diameters of nanoparticles stabilized by CSHPG, DSHPG, and OSHPG are within 2.7–3.6 nm. The palladium nanoparticles could be dispersed well in the nonpolar base fluid such as decalin. The nanofluids with Pd@DSHPG and Pd@OSHPG could remain stable for up to 330 days at room temperature. The nanofluid with Pd@DSHPG or Pd@OSHPG could be stable for more than 24 h at 110 °C. The thermal conductivity of the nanofluids improved with increasing temperature and the mass fraction of nanoparticles compared to the corresponding base fluid. The long alkyl chain-modified HPG can give better protection for nanoparticles from agglomeration and assist metal nanoparticles in enhancing the thermal conductivity of nanofluids.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Xiaoxu Dong,Mei Cui,Renliang Huang,Rongxin Su,Wei Qi,Zhimin He
A superhydrophobic and superoleophilic porous composite was successfully prepared via a polydopamine-assisted surface coating of MIL-53(Fe) and 1-dodecanethiol (DDT) on a melamine formaldehyde (MF) sponge. The as-prepared sponge composite (MIL-DDT@MF) has a high water contact angle (WCA) of 151.8°, which is probably attributed to both the rough surface derived from in situ growth of MIL-53 nanocrystals and the low surface energy due to grafting of hydrophobic 1-dodecanethiol. The MIL-DDT@MF sponge can effectively absorb oil or organic solvent with an absorption capacity of up to 54.1 (for petroleum) to 120.2 (for chloroform) times its own weight. In addition, the MIL-DDT@MF sponge retained a high absorption capacity and maintained approximately 78% of its original value after 50 cycles of reuse. Moreover, the MIL-DDT@MF sponge can selectively absorb the oil/organic solvent from water and achieve continuous oil–water separation. The separation efficiency of n-hexane, dichloromethane, and crude oil from water or seawater can reach above 95%. The superhydrophobic and superoleophilic MIL-DDT@MF sponge has potential as a promising absorbent for treatment of oily wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 20
·3703-3710
·
IF 3.849
Qingshuang Liang,Keke Huang,Xiaoru Ren,Wei Zhang,Renguo Xie,Shouhua Feng
In this work, Cu–Sb–S nanocrystals (NCs) with various compositions and crystal structures are realized by only tuning the amount of 1-dodecanethiol (DDT). When the DDT amount is 3.6, 5.5, 20.5, and 25.6 mmol, pure tetragonal Cu3SbS4, cubic Cu12Sb4S13, orthorhombic CuSbS2, and orthorhombic Cu3SbS3 NCs are respectively obtained. Systematic investigations demonstrate that different amounts of DDT are responsible for formation of the different compositions and crystal structures of the initial Cu2−xS seeds, which results into the formation of various Cu–Sb–S NCs. This reaction path is further verified by control experiments from successful preparation of Cu–Sb–S NCs comparable to that of the as-prepared ones directly from the reaction of Sb2S3 NCs with Cu2−xS seeds. The current study not only provides a facile and economical way to synthesize high-quality Cu–Sb–S NCs, but also opens a new route for preparation other I–V–VI multicomponent chalcogenides NCs, such as Cu–Bi–S systems.
研究领域:
材料科学
·
化学合成
·
纳米技术
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Hao Zhou,Qing Lu
In this work, a facial electrochemical method was developed for the sensitive triclosan (TCS) detection. The Au nanoparticles-electrochemically reduced graphene oxide (Au-ErGO) composite was deposited on glassy carbon electrode (GCE) by electrochemical way. Dodecanethiol (DDT) monolayers further self-assembled on Au-ErGO by forming Au-S bond. SEM, AFM, EDS, Raman, contact angle test and electrochemical way were applied to characterize the composites. The wrinkled Au-ErGO film would provide more active sites for TCS oxidation. More importantly, DDT monolayers could reduce the non-faradic current derived from the electrolyte. Therefore, the electrochemical response of TCS was effectively amplified on DDT/Au-ErGO/GCE with low background current. Under optimal conditions, the linear response of TCS on the modified electrodes ranged from 0.500 nM to 20.0 µM. The detection limit was calculated to be 0.253 nM. The modified electrode presented a reliable, sensitive and selective determination of TCS. Moreover, the sensor exhibited favorable analytical performance in lake water and daily chemicals.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Yu Zou,Jiang Jiang
We report the colloidal synthesis of monodisperse phase pure chalcostibite CuSbS 2 nanocrystals in high boiling point solvent. The use of dodecanethiol as ligands had an advantage over oleylamine on avoiding the hydrolysis of Sb precursor. The effect of reaction temperature and Cu/Sb feed molar ratio on the synthesis of copper antimony sulfide nanocrystals in dodecanethiol system was investigated. As a result of the reactivity difference between Cu and Sb precursors, the formation of CuSbS 2 nanocrystals involves the preferential nucleation of Cu-rich nanocrystals and their subsequent reaction with remaining Sb precursors. The band gap of the resulting CuSbS 2 nanocrystals was measured to be ~1.59 eV.
研究领域:
材料化学
·
纳米科学
·
无机化学
·
半导体材料
·
胶体化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 25
·13633-13639
·
IF 11.9
Hongjing Wang,Shaojian Jiang,Hongjie Yu,Kai Deng,Ziqiang Wang,Xiaonian Li,You Xu,Liang Wang
Direct electrosynthesis by a two-electron oxygen reduction reaction (2e− ORR) is an effective and promising synthetic method for producing H2O2. However, the rate of the oxygen reduction reaction is greatly limited by the slow transport of O2. Interface engineering is an important means to control reactive microenvironments. Herein, we modified hollow mesoporous carbon spheres (HMCSs) with 1-octadecanethiol (ODT) to form a superhydrophobic interface, which provides an O2-enriched surface layer at the catalytically active site and enhances O2 adsorption. In 0.1 M KOH, the ODT-functionalized HMCSs (HMCSs@ODT) exhibits superior activity for H2O2 synthesis with 94.6% H2O2 selectivity across a wide potential range. During the electrolysis process, the hydrophobic interface can effectively release the H2O2 from the surface of the catalyst and prevent their further reduction to H2O. In an H-cell system, HMCSs@ODT exhibits a remarkable H2O2 yield rate of 838.8 mmol gcat.−1 h−1 and a notable faradaic efficiency of 95.2% at 0.365 V. The combination of the mesoporous structure and superhydrophobic interface provides a research idea for the electrochemical synthesis of H2O2.
研究领域:
材料科学
·
电化学
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xin Li,Longxun Teng,Yening Ren,Rui Liu,Xiaoyuan Zhan,Haiqing Sun,Weiwei Zhang,Jianxu Ding,Huiling Zhu
Metal halide perovskite CsPbI3 quantum dots (QDs) have sparked widespread research due to their intriguing optoelectronic. However, the CsPbI3 QDs undergo inevitable aging and luminescence quenching caused by the weak binding ability of oleate (OA–)/oleylammonium (OAm+), hindering further practical application. Herein, we have realized ultrafast rejuvenation of the aged CsPbI3 QDs that have lost their photoluminescence performance based on a 1-dodecanethiol (DDT) surface ligand to restore the outstanding red light emission with a high photoluminescence quantum yield (PLQY) from 25 to 90%. Furthermore, CsPbI3 QDs with DDT surface treatment maintain a cubic phase and high PLQY value even after 35 days. The DDT ligands can form a strong bond with Pb2+ and passivate I– ion vacancies, enhancing radiative recombination efficiency and thereby improving the PLQY of the QDs. The stable yet easily accessible surface of the DDT-capped CsPbI3 QDs was successfully employed as white LEDs and exhibited considerable enhanced luminous performance, suggesting promising application in solid-state lighting fields.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2018
·Vol. 10
·期 6
·808-817
·
IF 1.318
Han Boning,Yu Zengchao,Yang Yanmin,Yang Lin,Hu Fan,Li Zhiqiang,Chen Wei
CuGaS2 quantum dots (CGS QDs) with a chalcopyrite crystal structure were synthesized by a hot-injection method. The structural and optical characteristics of the obtained nanocrystals were investigated in the reaction temperature range of 210 °C to 260 °C, it was
found that the CuGaS2 QDs were governed by the surface groups functionalized with 1-dodecanethiol capping ligands in the reaction system. The appropriate reaction temperature favored the decomposition of the surface ligand. CGS QDs synthesized at 230 °C exhibited a narrow particle
size distribution and good crystallinity. In terms of the optical spectra, with an increase in the reaction temperature, the excitonic absorption peaks and band gap emission peaks were systematically red-shifted, thus exhibiting a quantum confinement effect. A mechanism for the growth and
formation of nanoparticles on the basis of the reaction temperature is proposed. Furthermore, the obtained CGS QDs showed promising visible-light-driven photocatalytic activity during degradation of rhodamine 6G.
研究领域:
材料科学
·
纳米技术
·
光催化
·
化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Lin Yan,Wang Tuo,Zhang Lili,Zhang Gong,Li Lulu,Chang Qingfeng,Pang Zifan,Gao Hui,Huang Kai,Zhang Peng,Zhao Zhi-Jian,Pei Chunlei,Gong Jinlong
The mechanism of how interfacial wettability impacts the CO 2 electroreduction pathways to ethylene and ethanol remains unclear. This paper describes the design and realization of controllable equilibrium of kinetic-controlled *CO and *H via modifying alkanethiols with different alkyl chain lengths to reveal its contribution to ethylene and ethanol pathways. Characterization and simulation reveal that the mass transport of CO 2 and H 2 O is related with interfacial wettability, which may result in the variation of kinetic-controlled *CO and *H ratio, which affects ethylene and ethanol pathways. Through modulating the hydrophilic interface to superhydrophobic interface, the reaction limitation shifts from insufficient supply of kinetic-controlled *CO to that of *H. The ethanol to ethylene ratio can be continuously tailored in a wide range from 0.9 to 1.92, with remarkable Faradaic efficiencies toward ethanol and multi-carbon (C 2+ ) products up to 53.7% and 86.1%, respectively. A C 2+ Faradaic efficiency of 80.3% can be achieved with a high C 2+ partial current density of 321 mA cm −2 , which is among the highest selectivity at such current densities.
研究领域:
化学工程
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 16
·期 8
·1237-1246
·
IF 4.803
Sun Xiaofei,Feng Shijie,Zhang Zhe,Zhang Pengyu,Zhao Jiefeng,Gao Yunling,Yun Junxian
A Ag particle-coated and 1-dodecanethiol-modified melamine sponge (Ag-DDT-MS) was prepared through surface roughness by coating silver particles and subsequent grafting of a hydrophobic long hydrocarbon chain. Superhydrophobic and 3D porous Ag-DDT-MS was characterized by Fourier transform infrared spectroscopy, scanning electron microscope, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The water contact angle of Ag-DDT-MS reached 159.2°. Ag-DDT-MS exhibited excellent absorption capacity for high viscous oils and organic solvents, ranging from 42.8 to 105.2 g·g −1 . The absorbed oils can be easily collected by the mechanical pressing process, and the oil recovery rate was satisfactory, more than 90% after 20 recycles. Ag-DDT-MS material also demonstrated good stability and excellent compression-recovery ability, keeping 88.6% of the initial height after ten compression-release cycles.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）