Topic
BET theory
About: BET theory is a research topic. Over the lifetime, 9046 publications have been published within this topic receiving 286142 citations.
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TL;DR: In this paper, the effect of adding transition metal oxides (rGO) to NiFe2O4 nanoparticles was investigated in a hybrid electrode superconducting electrochemical tests, including CV, EIS, and charge discharge.
111 citations
TL;DR: The Ta(3)N(5) nanoparticles showed the significantly enhanced photocatalytic activity for the degradation of MB in comparison with the larger-sized Ta(2)O(5), and showed much higher photocatallytic activity under visible light irradiation compared with TiO(2-x)N-x in the same size.
Abstract: Nanocrystalline Ta3N5 particles with a surface area of more than 33 m2/g were synthesized by nitridation of nanosized Ta2O5 particles using NH3 as the reactant gas. It was found that nanocrystalline Ta2O5 was converted into Ta3N5 completely (by X-ray diffraction, XRD) at 700 °C within 5.0 h, which was much lower than the temperature 900 °C for the complete nitridation of micrometer-sized Ta2O5 powder. The oxide precursor and the resulting nitride were characterized by XRD analysis, transmission electron microscopy, UV−vis diffuse reflectance spectra, and BET surface area techniques. The nitrogen contents in the prepared Ta3N5 powders were quantitatively determined with a CHN elemental analyzer. Nanocrystalline Ta3N5 showed an absorption edge of around 600 nm, and Ta3N5 in the size of about 26 nm exhibited a blue shift of 15 nm in the adsorption edge. The photocatalytic activity of the prepared Ta3N5 under UV−vis and visible light irradiation was compared to that of nanocrystalline TiO2-xNx using the photo...
111 citations
TL;DR: In this article, a high efficient production of fatty acid methyl ester (FAME) from soybean oil and rapeseed oil was carried out using modified CaO as solid basic catalyst by connecting bromooctane to the surface of CaO chemically in a simple way.
110 citations
TL;DR: Optimum conditions for AR 114 removal were found to be pH 3, adsorbent dosage=3g/L of solution and equilibrium time=4h, and higher removal percentages were observed at lower concentrations of AR 114.
110 citations
TL;DR: In this paper, 1.25 and 0.0% Pt-loaded WO 3 powders were produced by flame spray pyrolysis (FSP) and structurally characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscope (HR-TEM).
Abstract: In this work, unloaded WO 3 and 0.25–1.0 wt% Pt-loaded WO 3 powders were produced by flame spray pyrolysis (FSP) and structurally characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM). The BET surface area ( SSA BET ) of the nanoparticles was measured by nitrogen adsorption. Thick WO 3 films (30 μm) on alumina substrates interdigitated with gold electrodes were prepared by spin-coating technique and tested for gas sensing towards H 2 , CO, C 2 H 4 and C 2 H 5 OH gases at concentrations ranging from 0.01 to 1 vol% in dry air with operating temperatures ranging from 150 to 300 °C. The sensing films exhibited excellent H 2 sensing performances with a very high response, short response time and high selectivity towards CO, C 2 H 4 and C 2 H 5 OH gases. The response (within seconds) and recovery (within minutes) times were very fast. It was found that 1.0 wt% Pt-loaded WO 3 sensing films showed extremely excellent H 2 sensing performances at 150 °C with the highest sensor response ( S ∼ 1.34 × 10 5 ) and the highest selectivity compared to the other gases.
110 citations