scholarly journals Selective oil/water filter paper via a scalable one-pot hydrothermal growth of ZnO nanowires

RSC Advances ◽  
2015 ◽  
Vol 5 (110) ◽  
pp. 91001-91005 ◽  
Author(s):  
Yi Chen ◽  
Li Liu ◽  
Hyun-Joong Chung ◽  
John A. Nychka
Keyword(s):  
Hydrothermal Synthesis ◽  
Filter Paper ◽  
Zno Nanowires ◽  
Hydrothermal Growth ◽  
Zno Nanowire ◽  
One Pot ◽  
Water Filter ◽  
Oil Water ◽  
Filter Papers

A scalable, one pot hydrothermal synthesis of ZnO nanowire converted commodity filter papers to efficient oil/water separators. The coated filter paper exhibited superhydrophilic and superoleophobic properties in ambient and underwater conditions.

Effect of Hydrothermal Solutions on Optical and Electrical Properties of ZnO Nanowires Grown on a ZnO:Al Seed Layer for Improved Mechanical Performance

2020 ◽  
Vol 15 (3) ◽  
pp. 307-315
Author(s):  
H. Tugral Arslan ◽  
Cuneyt Arslan ◽  
N. Baydogan
Keyword(s):  
Seed Layer ◽  
Mechanical Performance ◽  
Sol Gel ◽  
Soda Lime ◽  
Zinc Nitrate ◽  
Zno Nanowires ◽  
Hydrothermal Growth ◽  
Optimal Size ◽  
Zno Nanowire ◽  
Seed Layers

ZnO nanowire arrays were fabricated by hydrothermal growth on Al-doped ZnO (ZnO:Al) seed layers coated on soda-lime silicate glass by sol–gel coating. The properties of the ZnO:Al seed layer were evaluated to obtain ZnO nanowires with the optimal size and length and to realize suitable adhesion of the ZnO:Al grains to the substrate. The optimal mechanical performance (adhesion and abrasion resistance) of the ZnO:Al seed layer was obtained at Al 1 at.%. The seed layers annealed between 400 and 500 C exhibited enhanced ZnO nanowire growth. Increasing the annealing temperature within this range improved the electrical and optical properties of the nanowires. Additionally, two chemical compounds, zinc acetate (ZA) and zinc nitrate (ZN), were used to compare the effects of the solution type on the hydrothermal growth. The nanowires grown in the ZA solution were thicker and had higher electrical conductivity compared to the ZN solution. The gamma transmission technique was used to determine the agglomeration of ZnO:Al nanospheres and to examine the crystallite size and density of the ZnO:Al seed layers.

scholarly journals Performance improvement of miniaturized ZnO nanowire accelerometer fabricated by refresh hydrothermal synthesis

2017 ◽  
Vol 4 (9) ◽  
pp. 170557 ◽  
Author(s):  
Sangho Song ◽  
Hyun Chan Kim ◽  
Jung Woong Kim ◽  
Debora Kim ◽  
Jaehwan Kim
Keyword(s):  
Hydrothermal Synthesis ◽  
Performance Improvement ◽  
Piezoelectric Layer ◽  
Copper Substrate ◽  
Zno Nanowires ◽  
Synthesis Methods ◽  
Zno Nanowire

Miniaturized accelerometers are necessary for evaluating the performance of small devices, such as haptics, robotics and simulators. In this study, we fabricated miniaturized accelerometers using well-aligned ZnO nanowires. The layer of ZnO nanowires is used for active piezoelectric layer of the accelerometer, and copper was chosen as a head mass. Seedless and refresh hydrothermal synthesis methods were conducted to grow ZnO nanowires on the copper substrate and the effect of ZnO nanowire length on the accelerometer performance was investigated. The refresh hydrothermal synthesis exhibits longer ZnO nanowires, 12 µm, than the seedless hydrothermal synthesis, 6 µm. Performance of the fabricated accelerometers was verified by comparing with a commercial accelerometer. The sensitivity of the fabricated accelerometer by the refresh hydrothermal synthesis is shown to be 37.7 pA g −1 , which is about 30 times larger than the previous result.

PDA-assisted one-pot fabrication of bioinspired filter paper for oil–water separation

Cellulose ◽  
2018 ◽  
Vol 26 (2) ◽  
pp. 1355-1366 ◽  
Author(s):  
Xinde Tang ◽  
Xuefei Wang ◽  
Chao Tang ◽  
Jianpeng Ma ◽  
Suyuan Zhang ◽  
...  
Keyword(s):  
Filter Paper ◽  
One Pot ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water

Preparation of Superhydrophobic Coatings on Filter Paper for Oil-Water Separation

2020 ◽  
Vol 978 ◽  
pp. 492-498
Author(s):  
Sangeetha Sriram ◽  
R.K. Singh ◽  
Aditya Kumar
Keyword(s):  
Filter Paper ◽  
Separation Efficiency ◽  
Impact Resistance ◽  
Industrial Applications ◽  
Water Separation ◽  
Casting Technique ◽  
Prime Concern ◽  
Oil Water Separation ◽  
Oil Water ◽  
Filter Papers

Oil-water separation has become the prime concern for fossil fuel exploration industries. In the present study, superhydrophobic coating on filter paper was prepared to repellent water while allowing oil to flow freely from its porous structures. Coating was generated by solution-casting technique on cellulosic filter paper using silica nanoparticles (SiO2) along with silane coupler hexadecyltrimethoxysilane (HDTMS). The contact angle was measured, and it has shown 175.1° ± 1.5°, and the tilting angle is 1.5° ± 0.2°. The surface topography of coated and treated samples was also examined. Furthermore, thermal stability of fabricated filter papers was evaluated by annealing at a different range of temperatures (20 °C-220 °C). The pH resistance of the coatings were inspected by immersing the specimens in acidic and alkali solutions (pH 2-13). The mechanical durability was examined by tape-peeling and abrasion tests. Moreover, these samples have shown waterjet impact resistance. Filtration study was performed on coated filter papers using various oil-water mixtures of kerosene-water and petroleum ether-water and results have shown the separation efficiency of 99% and 98.5%, respectively. Thus these filter papers can have potential practical and industrial applications.

scholarly journals Well-Dispersed Silver Nanoparticles on Cellulose Filter Paper for Bacterial Removal

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 595
Author(s):  
Hsiu-Wen Chien ◽  
Ming-Yen Tsai ◽  
Chia-Jung Kuo ◽  
Ching-Lo Lin
Keyword(s):  
Silver Nanoparticles ◽  
Filter Paper ◽  
X Ray Diffraction ◽  
Bacterial Reduction ◽  
Treatment Technology ◽  
Bacterial Removal ◽  
Contaminated Drinking Water ◽  
Gravity Driven ◽  
Filter Papers ◽  
Cellulose Filter

In this study, a polydopamine (PDA) and polyethyleneimine (PEI)-assisted approach was developed to generate well-distributed PDA/PEI/silver (PDA/PEI/Ag) nanocomplexes on the surfaces of commercial cellulose filter papers to achieve substantial bacterial reduction under gravity-driven filtration. PDA can bind to cellulose paper and act as a reducer to produce silver nanoparticles (AgNPs), while PEI can react with oxidative dopamine and act as a dispersant to avoid the aggregation of AgNPs. The successful immobilization of PDA/PEI/Ag nanocomplexes was confirmed by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) were used as pathogen models to test the efficacy of the PDA/PEI/Ag nanocomplex-incorporated filter papers. The PDA/PEI/Ag nanocomplex-incorporated filter papers provided a substantial bacterial removal of up to 99% by simple gravity filtration. This work may be useful to develop a feasible industrial production process for the integration of biocidal AgNPs into cellulose filter paper and is recommended as a local-condition water-treatment technology to treat microbial-contaminated drinking water.

One-pot hydrothermal synthesis: Enhanced MOR and OER performance using low-cost Mn3O4 electrocatalyst

2021 ◽  
Vol 46 (27) ◽  
pp. 13946-13951
Author(s):  
P.C. Nagajyothi ◽  
R. Ramaraghavulu ◽  
K. Munirathnam ◽  
K. Yoo ◽  
Jaesool Shim
Keyword(s):  
Hydrothermal Synthesis ◽  
Low Cost ◽  
One Pot

A Simple Process to Prepare High‐Efficiency Durable Oil–Water Filter

2021 ◽  
pp. 2100594
Author(s):  
Jiawei Hu ◽  
Yi Chen ◽  
Yueyun Zhou ◽  
Xiaokun Fan ◽  
Jie Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Simple Process ◽  
Water Filter ◽  
Oil Water
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