“…Photocatalytic efficiencies of TiO 2 catalysts depend on their crystalline phases, surface morphologies, specific surface areas, electronic structures, and thermal treatments. , To achieve peak catalytic performance, optimizations of these parameters are necessary. , Most of the previously reported studies on conversion of NO x gases have employed various spectroscopic (e.g., infrared (IR), laser absorption, and chemiluminescence (CL)) or electrochemical techniques for detection of NO x reaction products. The use of gas chromatography (GC) systems equipped with electron capture detectors (ECDs) or mass spectrometers (MS) , for identification of NO x reaction products have been previously reported. In addition, biomedical applications of NO detection, by using high resolution MS and, indirectly, semiconducting metal oxides, have been reported.…”