다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

SnO2: A comprehensive review on structures and gas sensors

This review focuses on introducing and explaining electrodepostion mechanisms and electrodeposition-based synthesis strategies used for the production of catalysts and semiconductor electrodes for use in water-splitting photoelectrochemical cells (PECs). It is composed of three main sections: electrochemical synthesis of hydrogen evolution catalysts, oxygen evolution catalysts, and semiconductor electrodes. The semiconductor section is divided into two parts: photoanodes and photocathodes. Photoanodes include n-type semiconductor electrodes that can perform water oxidation to O2 using photogenerated holes, while photocathodes include p-type semiconductor electrodes that can reduce water to H2 using photoexcited electrons. For each material type, deposition mechanisms were reviewed first followed by a brief discussion on its properties relevant to electrochemical and photoelectrochemical water splitting. Electrodeposition or electrochemical synthesis is an ideal method to produce individual components and ...

Electrochemical Synthesis of Photoelectrodes and Catalysts for Use in Solar Water Splitting

Ongoing advances in nanotechnology research have established a variety of methods to synthesize nanoparticles (NPs) from a diverse range of materials, including metals, semiconductors, ceramics, metal oxides, polymers, etc. Depending upon their origin and synthesis methods, NPs possess unique physicochemical, structural and morphological characteristics, which are important in a wide variety of applications concomitant to electronic, optoelectronic, optical, electrochemical, environment and biomedical fields. This review provides a comprehensive overview on various physical, chemical and bio-assisted methods largely employed to synthesize and fabricate NPs of varying size, surface characteristics, functionalities and physicochemical behavior. The key applications of nanoparticles have also been discussed.

Methods and strategies for the synthesis of diverse nanoparticles and their applications: a comprehensive overview

Effect of Annealing Temperature on the Photocatalytic Activity of TiO2 Thin Films

Anatase-rutile transformation through high-temperature annealing of titania films produced by ultrasonic spray pyrolysis

Photocatalytic activity under visible light of Fe-doped CeO2 nanoparticles synthesized by flame spray pyrolysis

Photocatalytic activity of the binary composite CeO 2 /SiO 2 for degradation of dye

Investigating the photodegradation pathways of phenol, as well as the efficiency of photocatalysis by commercial TiO2 is the main task in this present work. Commercial TiO2 particles with the following characteristics: 96 % anatase, 4 % rutile, and 400 nm particles size were used as catalyst source. The photocatalytic process was carried out by mixing 100 ppm of phenol solution and 0.9 g/L of TiO2 particles with magnetic stirrer under UV-C light with 210 nm wavelength. UV–Vis spectrophotometer and COD measurement were used to evaluate the efficiency of photocatalysis. On the other hand, the formed intermediate products during phenol photodegradation were identified by LC–MS, UV–Vis spectrophotometer, and photoluminescence techniques. The results indicated that phenol was removed completely after 24 h of UV-C irradiation. The absorbance peak of phenol slightly decreased during the first 16 h. However, the peak dramatically reduced and disappeared at 24 h of irradiation. This degradation mechanism also occurred similarly to the COD value. There were two phases in photocatalysis of phenol. In phase-I, phenol was decomposed to hydroxylated compounds such as catechol, benzoquinone, and complexes with two benzene rings. In the mineralization phase, hydroxylated compounds were mineralized strongly by hydroxyl radicals, hydrogen radicals, and UV energy to form short-chain organic compounds such as formic acid, glycerol, and oxalic acid. Finally, hydrocarbon chains were broken easily and removed in the forms of carbon dioxide and water.

Auppatham Nakaruk

Papers

Effect of Annealing Temperature on the Photocatalytic Activity of TiO2 Thin Films

Anatase-rutile transformation through high-temperature annealing of titania films produced by ultrasonic spray pyrolysis

Photocatalytic activity under visible light of Fe-doped CeO2 nanoparticles synthesized by flame spray pyrolysis

Photocatalytic activity of the binary composite CeO 2 /SiO 2 for degradation of dye

Photodegradation mechanisms of phenol in the photocatalytic process