Characterization of Carbon Dots Using HEPA Filter/Fine dust Through the Solvothermal Method

2021 ◽  
Vol 71 (7) ◽  
pp. 574-578
Author(s):  
Jong Won CHUNG ◽  
Hyun Kyoung YANG*
Keyword(s):  
Carbon Dots ◽  
Solvothermal Method ◽  
Fine Dust

scholarly journals Synthesis and characterization of Gd2Zr2O7 defect-fluorite oxide nanoparticles via a homogeneous precipitation-solvothermal method

RSC Advances ◽  
2017 ◽  
Vol 7 (87) ◽  
pp. 54980-54985 ◽  
Author(s):  
Zhe Tang ◽  
Zhangyi Huang ◽  
Jianqi Qi ◽  
Xiaofeng Guo ◽  
Wei Han ◽  
...  
Keyword(s):  
Solvothermal Method ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles ◽  
Homogeneous Precipitation

Defect-fluorite structured Gd2Zr2O7 nanoparticles were successfully synthesized via a homogeneous precipitation-solvothermal method using urea as a precipitant.

Characterization of Classroom Fine Dust in Urban Elementary Schools

2021 ◽  
Vol 37 (1) ◽  
pp. 113-124
Author(s):  
Sujeong Heo ◽  
Yoon Kim ◽  
Yerim Kwoun ◽  
Tae Jung Lee ◽  
Young Min Jo
Keyword(s):  
Elementary Schools ◽  
Fine Dust ◽  
Urban Elementary Schools

Solvothermal synthesis and characterization of well-dispersed cerium-doped Y2SiO5 phosphor particles

2021 ◽  
Vol 112 (10) ◽  
pp. 812-816
Author(s):  
Xianxue Li
Keyword(s):  
Solvothermal Method ◽  
Luminescence Decay ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fluorescence Spectrophotometry ◽  
Decay Properties ◽  
Transmission Electron ◽  
Water As Solvent ◽  
Pure Phase

Abstract Well-dispersed cerium-doped Y2SiO5 (Ce:YSO) phosphor particles with spherical morphology and good luminescence intensity have been achieved by a solvothermal method with ethanol and water as solvent media. X-ray diffraction, Fourier transform infrared spectroscopy, fluorescence spectrophotometry and transmission electron microscopy were employed to characterize the as-synthesized Ce:YSO precursor and powders. The results showed that pure-phase Ce:YSO powders with a mean particle size of about 162 nm were accurately available at 310°C and above. The fluorescence ability and persistent luminescence decay properties of the Ce:YSO powders were also studied, and the excellent fluorescence properties could be attributed to the homogeneous Ce:YSO particles obtained through the solvothermal method.

Characterization of cubic and star-shaped dendritic PbS structures synthesized by a solvothermal method

2012 ◽  
Vol 81 ◽  
pp. 55-58 ◽  
Author(s):  
Anukorn Phuruangrat ◽  
Titipun Thongtem ◽  
Budsabong Kuntalue ◽  
Somchai Thongtem
Keyword(s):  
Solvothermal Method

scholarly journals Synthesis and Optical Characterization of Carbon Dot from Peels of Dragon Fruit and Pear

2018 ◽  
Vol 4 (1) ◽  
pp. 19 ◽  
Author(s):  
Selvy Uftovia Hepriyadi ◽  
. Isnaeni
Keyword(s):  
Carbon Dots ◽  
Optical Characterization ◽  
Heating Time ◽  
Emission Wavelength ◽  
Time Resolved ◽  
Carbon Dot ◽  
Infrared Wavelength ◽  
Dragon Fruit ◽  
Time Changes

Fluorescence materials such as carbon dots are unique and non-toxic materials that can be produced using many methods. In this research, synthesis and optical characterization of carbon dots from the peels of dragon fruit and pear have been done. The synthesis uses bottom-up method using microwave with 20 minutes, 40 minutes, and 80 minutes of heating time. The result of optical characterizations showed that the samples that have been heat treated are carbon dots based of the absorbance in the range of 280-350 nm, and the intensity are decreased in the range of visible and infrared wavelength. There are emission and intensity changes by different heat treatments. From the samples of dragon fruit's peels, the emission wavelength tended to shift toward visible light at the wavelength of 551.51 nm, 507.98 nm and 487.28 nm with the excitation at the wavelength of 420 nm from pulsed pico-laser. While, the emission wavelength from the samples of pears peels were fluctuate in wavelength of 529.09 nm, 507.52 nm and 519.46 nm. Similarly, the time-resolved photoluminescence characterization test showed that there were time changes in each sample of carbon dot. The decay lifetime of carbon dots was fluctuated between 4.5 ns - 5.4 ns for dragon fruit’s peels and about 1.9 ns - 2.4 ns for pear's peels.

Preparation and electrochemical characterization of carbon dots/polyaniline composite materials

2019 ◽  
Vol 77 (3) ◽  
pp. 1067-1080
Author(s):  
Abida Abdunazar ◽  
Yanhui Zhang ◽  
Arzugul Muslim ◽  
Lin Wang ◽  
Haidie Lan
Keyword(s):  
Composite Materials ◽  
Carbon Dots ◽  
Electrochemical Characterization

scholarly journals Carbon Dots as Sensing Layer for Printed Humidity and Temperature Sensors

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2446
Author(s):  
Almudena Rivadeneyra ◽  
José F. Salmeron ◽  
Fabio Murru ◽  
Alejandro Lapresta-Fernández ◽  
Noel Rodríguez ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Internet Of Things ◽  
Polyethylene Terephthalate ◽  
Carbon Dots ◽  
Temperature Sensors ◽  
Capacitive Sensors ◽  
Exciting Frequency ◽  
Sensor Structure ◽  
Pet Film

This work presents an innovative application of carbon dots (Cdots) nanoparticles as sensing layer for relative humidity detection. The developed sensor is based on interdigitated capacitive electrodes screen printed on a flexible transparent polyethylene terephthalate (PET) film. Cdots are deposited on top of these electrodes. An exhaustive characterization of the nanoparticles has been conducted along with the fabrication of the sensor structure. The accompanied experiments give all the sensibility to the Cdots, showing its dependence with temperature and exciting frequency. To the best of our knowledge, this work paves the path to the use of these kind of nanoparticles in printed flexible capacitive sensors aimed to be employed in the continuously expanding Internet of Things ecosystem.

Synthesis and characterization of the nickel@carbon dots hybrid material and its application in the reduction of Cr(vi)

2014 ◽  
Vol 38 (12) ◽  
pp. 5861-5867 ◽  
Author(s):  
Yali Guo ◽  
Dan Wang ◽  
Xiaoyu Liu ◽  
Xudong Wang ◽  
Weisheng Liu ◽  
...  
Keyword(s):  
Hybrid Material ◽  
Carbon Dots ◽  
Room Temperature ◽  
Synthesis And Characterization ◽  
Simple Reduction

The nickel@carbon dots hybrid material (Ni@C-dots) was prepared through a simple reduction route and tested as a catalyst to reduce toxic Cr(vi) to nontoxic Cr(iii) under room temperature.

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