Analytical Methods
·
2014
·Vol. 6
·期 7
·2066-2071
·
IF 1.938
Wei Zhang,Bowei Li,Lingxin Chen,Yunqing Wang,Dingxue Gao,Xuehua Ma,Aiguo Wu
A simple and facile method has been demonstrated to fabricate low-cost surface enhanced Raman scattering (SERS) active microfluidic paper chips using a painting brush. This strategy solves the problem of mass production of highly reproducible SERS substrates without complicated or bulky micro- or nanofabrication instruments. Rhodamine 6G (R6G) was chosen as a probe molecule to evaluate the performance of the SERS active chip. To further demonstrate the possibility of this method's potential application in environmental monitoring, trace malachite green (MG) was successfully analyzed on this chip. The performance of our chips was desirable. The paper substrates with silver nanoparticles deposited by brush were found to be cost-efficient and highly sensitive (LOD for R6G and MG are 1 nM and 10 nM, respectively), and have good reproducibility (∼15% relative standard deviation).
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Shoujian Gao,Yuzhang Zhu,Yuqiong Gong,Zhenyi Wang,Wangxi Fang,Jian Jin
Recently, ultrathin polyamide nanofiltration membranes fabricated on nanomaterial-based supports have overcome the limitations of conventional supports and show greatly improved separation performance. However, the feasibility of the nanomaterial-based supports for large-scale fabrication of the ultrathin polyamide membrane is still unclear. Herein, we report a controllable and saleable fabrication technique for a single-walled carbon nanotube (SWCNT) network support via brush painting. The mechanical and chemical stability of the SWCNT network support were carefully examined, and an ultrathin polyamide membrane with thickness of ∼15 nm was successfully fabricated based on such a support. The obtained thin-film composite (TFC) polyamide nanofiltration membranes exhibited extremely high water permeability of ∼40 L m–2 h –1 bar–1, a high Na2SO 4 rejection of 96.5%, and high monovalent/divalent ion permeation selectivity and maintained highly efficient ion sieving throughout 48 h of testing. This work demonstrates a practical route toward the controllable large-scale fabrication of the TFC membrane with an SWCNT network support for ion and molecule sieving. This work is also expected to boost the mass production and practical applications of state-of-the-art membranes composed of one-dimensional and two-dimensional nanomaterials as well as the nanomaterial-supported TFC membranes.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Yuyi Wei,Dandan Liang,Hongyang Zhou,Shoujie Huang,Weiwei Zhang,Jin Gu,Chuanshuang Hu,Xiuyi Lin
Wood is a promising substrate to decorate conductive material for preparing sustainable composites with electromagnetic interference (EMI) shielding function. Understanding the influences of the assembly manner of conductive materials on the EMI shielding property is essential to develop a facile fabrication method. Herein, the assembly manner of the MXene on wood is adjusted by applying three coating methods, i.e., vacuum-assisted immersion, spray coating, and brush coating. The surface morphologies , interaction between wood and MXene, electrical properties, and EMI shielding effectiveness (SE) of MXene-decorated wood (M/wood) composites were studied systematically. The results show that brush coating provides a flat and laminated MXene layer, hence an efficient conductive network can be constructed with a small loading of MXene. Ultimately, the M/wood composite prepared by brush coating displays an EMI SE of 40.5 dB at 8.2 ∼ 12.4 GHz with a MXene loading of 1.41 mg/cm 2 . Moreover, M/wood composites demonstrated excellent anti-mold function thanks to the reducing activity and fluorine-containing groups of MXene.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Zhangfeng Wu,Chuanluan Guo,Zhenwu Lu,Conghui Yuan,Yiting Xu,Lizong Dai
Flexible supercapacitors require some important characteristics such as good structural style and high performance, but low cost and easy manufacturing should not be ignored. Herein, we design flexible supercapacitors based on ordinary carbon materials. By using acetylene black as the conductor, this new type of flexible supercapacitor was built through brushing and realized the integration of electrode, supporting diaphragm and solid electrolyte. With this new structural form, the devices show extremely high tensile strength and good folding resistance. Supercapacitors can also be loaded with different active materials and exhibit many excellent electrochemical properties. When using polyaniline coated multi-wall carbon nanotube as the active material, it shows a surface capacity of 1 Fcm −2 level and a good rate performance. In the case of using activated carbon, it shows a good response and a good capacity retention of 100 ± 1 % and high coulomb efficiency . It can stably work at a temperature range of 5–55 °C. Even if injured, it can be used consistently. Our research may provide some references for the large-scale fabrication of new flexible supercapacitors.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Xinjuan Zeng,Yuanyuan Shen,Yongpeng Liu,Jingcheng Du,Li Chen,Wei Zhou,Hao Yang,Jihao Zuo,Cailong Zhou,Jing Lin
It is still a challenge to fabricate low-cost, large-scale, and environmentally friendly materials with special wettability for oil/water emulsions separation. Here, a cross-linked poly(vinyl alcohol)/glutaraldehyde/attapulgite/titanium dioxide coating was decorated on stainless steel mesh through a simple brush-painting approach, endowing it with superhydrophilicity/underwater superoleophobicity. The coating filled the mesh pores, achieving oil-in-water emulsions separation by effective "size-sieving" effect. The as-prepared mesh possessed good separation performance with rejection up to 97.5%. Furthermore, it maintained underwater superoleophobicity after 5 meters of abrasion with sandpaper, exhibiting excellent abrasion resistance . All the ingredients of the coating are low-cost and green industrial chemicals, as well as the preparation process is easy to scale-up, making the developed filtration material become a quite potential choice in practical emulsions separation.
研究领域:
材料科学
·
环境科学
✓ 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）