Synthesis of composite WO3/TiO2 nanoparticles by flame-assisted spray pyrolysis and their photocatalytic activity

Influences of Temperature on the Conversion of Ammonium Tungstate Pentahydrate to Tungsten Oxide Particles with Controllable Sizes, Crystallinities, and Physical Properties

“…In the case of the sample heated at 800 °C, the change in the surface roughness is due to the change in crystallinity. [13] Based on the results, phenomena happening during the heating process are illustrated in Fig. 4.…”

“…In our previous studies, we successfully produced inorganic oxide particles with controllable sizes, morphologies, and crystallinities [1,[11][12][13][14][15]. In the case of WO 3 , the WO 3 particles were prepared from various ammonium tungstate raw materials.…”

Photodecomposition Profile of Organic Material during the Partial Solar Eclipse of 9 March 2016 and Its Correlation with Organic Material Concentration and Photocatalyst Amount

“…Their reports have been completed with information about parameters involved in the photodecomposition, such as photocatalyst dosage, (Eskizeybek et al, 2012) initial concentration of organic materials, (Matthews 1991) properties of organic materials and catalyst, (Iskandar et al, 2007;Nandiyanto et al, 2009;Nandiyanto et al, 2013;Arutanti et al, 2014) temperature, pH, (Sun et al, 2008) reaction volume, light intensity, type of light sources (Matthews 1991;Eskizeybek et al, 2012) (i.e., artificial UV/visible light source and natural sunlight), turbidity , oxygen gas flow rate , additional chemical (i.e., oxidant, (Sun et al, 2008), reducing agent, co-catalyst, (Arutanti et al, 2014;Arutanti et al, 2015) and dopant (Arutanti et al, 2015)), and consideration of inhibitor. However, there is no report on the photodecomposition of organic materials during the solar eclipse phenomenon.…”

“…Taking a lesson from our previous approaches in the photocatalytic processes, (Iskandar et al, 2007;Nandiyanto et al, 2009;Nandiyanto et al, 2013;Arutanti et al, 2014;Arutanti et al, 2014;Arutanti et al, 2015;Nandiyanto et al, 2016) we investigated the photodecomposition of organic materials during the partial solar eclipse phenomenon in Bandung, Indonesia. As models of organic material and photocatalyst, curcumin and anatase titanium dioxide (TiO2) powder were used, respectively.…”

“…TiO 2 (as a model of catalyst) with a band gap of 3.35 eV is activated by absorbing UV light. (Arutanti, et al, 2014;Kormann, et al, 1991;Devipriya & Yesodharan, 2005) When there are e -and h + in the catalyst, unique phenomenon (known as charge separation) occurs. In the presence of water, e -can attract and convert oxygen (O 2 ) (Route R3), whereas h + can convert water molecule (H 2 O) (Route R4).…”