nanomaterials are synthesized at relatively low temperature (80 C) and with a short hydrothermal treatment time (3 h) using glucose (Glc) as a catalyst. Contrary to previous studies, it is possible to synthesize one of the Ag x Mo y O z binaries at 80 C by altering the pH of the reaction media in the presence of glucose. In addition, further experiments indicate that Ag/h-MoO 3 , Ag 2 Mo 2 O 7 and Ag/b-MoO 3 can be convertedto Ag/a-MoO 3 which can also be synthesized from a reaction involving ammonium heptamolybdate tetrahydrate and AgNO 3 at room temperature using cysteamine in both methods. Characterization with UV-Vis, XRD and Raman spectroscopy reveals high purity of as-synthesized product. These synthesized products are finally used to fabricate SERS substrates by coating a silicon wafer with a mixture of silver nanoparticles (Ag NPs) and Ag x Mo y O z (Si@Ag/Ag x Mo y O z ). The results show a good sensitivity and stability. In addition, it is also found that the SERS activity of Si

A Surface Enhanced Raman Scattering (SERS) substrate based on Ag/b-AgVO 3 nanobelts deposited on copper foil (Cu@Ag/b-AgVO 3 ) was used for the detection of carbamate pesticides: carbofuran, carbaryl, isoprocarb and propoxur. Cu@Ag/b-AgVO 3 has shown an excellent SERS activity for carbamate pesticides compared to silver nanoparticles (AgNPs). Under optimized conditions, detection limits of 2.5 pM, 10 pM, 50 pM and 75 pM were obtained for carbaryl, carbofuran, isoprocarb and propoxur respectively, suggesting that Cu@Ag/b-AgVO 3 is a good candidate for use as a SERS substrate for the trace level detection of these pesticides.

Background: Copper is a metal that is widely used in many fields such as industry and construction, etc. These different industrial sectors use acid solutions such as nitric acid and hydrochloric acid, etc. The use of acid solutions in the industrial environment causes degradation of materials. In recent decades, the use of corrosion inhibitors has become very essential. Objective: The objective of our study is to test the performance of meloxicam as a copper corrosion inhibitor in a nitric acid medium. Methods: The studies were conducted using the gravimetric method and density functional theory (DFT) at B3LYP/6-311G (d,p) level of theory. The inhibitory efficiency of the molecule increases with increasing concentration of Meloxicam, but decreases with increasing temperature. The adsorption of the molecule on the copper surface follows the Villamil model. Results and Discussion: The thermodynamic quantities of adsorption and activation were determined and discussed. Quantum chemical calculations have allowed determining the molecular descriptors. Conclusion: There is a good agreement between the experimental and theoretical results. Electrochemical studies are envisaged.