This paper described an application of TiO2 photocatalyst in the decomposition of nerve agent Sarin. Despite its importance in crisis management, the novelty of this paper is insufficient because TiO2-based UV-photocatalysis is not a new one for degrading gas contamination. The scientific content is also insufficient because the authors only provided some apparent experimental results but not the deep understanding in degradation kinetics. This paper was badly written with unclear discussion about the calculations of several kinetics parameters including adsorption rate (first and second) and decomposition rate (first and second). I don't know why the authors divided the adsorption process into two parts in Figure 1a and obtained two different adsorption rate. And, how did the authors determine the reaction order? In my opinion, the degradation processes, namely "GB-dec-first" and "GB-dec-second", should be a smoothly running one, and, the GB concentration with time should obey an exponential decrease that may indicate a first-order reaction. Too many figures were used. I think the authors may re-organize this paper and improve its science quality for another submission.
I don't think this topic should be paid attention by this journal because chemical warfare agents investigated by Japanese researchers may stimulate repulsion from the readers in other Asian countries.