http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Pathikrit Saha,Anoth Maharajan,Pritam Kumar Dikshit,김범수 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.12
We report a novel approach to using a polyurethane scaffold incorporated with cerium oxide nanoparticles as an alternative to the natural enzyme horseradish peroxidase for rapid and reusable detection of hydrogen peroxide. After the preparation of polyurethane from soybean oil and malic acid, cerium or iron oxide nanoparticles were synthesized and incorporated into the polyurethane scaffold by ultrasonic treatment. Formation of nanoparticles was characterized using Fourier transform infrared, transmission electron microscopy, X-ray photoelectron spectroscopy, and energy dispersive X-ray spectroscopy. Iron oxide nanoparticles (FeONPs) with an average size of 50nm were not uniformly integrated; however, spherical cerium oxide nanoparticles (CeONPs) with an average size of 14nm were easily incorporated into the polyurethane scaffold. The CeONP-incorporated polyurethane scaffold was highly responsive (<10s) to H2O2, with a limit of detection of 3.18µM, and was reusable for at least ten cycles without significant loss of detection activity. However, the response time of CeONP solution was more than 5min. Both FeONP solution and FeONP incorporated polyurethane scaffold were poor at detecting H2O2.
Sun A. Moon,Bipinchandra K. Salunke,Pathikrit Saha,Aarti R. Deshmukh,김범수 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.3
Copper(II) oxide (CuO), manganese dioxide (MnO2), and silver (Ag) nanoparticles were synthesized using Kalopanax pictus plant extract. The nanoparticle synthesis was monitored using UV-visible spectra. The occurrence of each peak at 368, 404, and 438 nm wavelength indicated the synthesis of CuO, MnO2, and Ag nanoparticles, respectively. The synthesized nanoparticles were characterized by X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, field emission scanning electron microscopy, and transmission electron microscopy. Catalytic potentials of the synthesized nanoparticles were compared to degrade two typical acidic and basic dyes (Congo red and Safranin O). The degradation ability of MnO2 nanoparticles against Congo red was higher than that of Ag and CuO nanoparticles. All three types of nanoparticles showed a similar degradation ability against Safranin O over 80%. This study demonstrates that biologically synthesized nanoparticles using Kalopanax pictus are good agents for degradation of dyes.