In this study, we developed a new multifunctional mercaptotriazine-containing organic molybdenum with excellent properties to enhance the tribological performance of biodegradable based oils. The coefficient of friction and wear scar diameter are greatly reduced up to ~40% and ~44%, respectively. Surface analyses reveal that the tribofilm is mainly composed of FeS, FeSO 4 , Fe 2 O 3 , MoO 3 , MoS 2 and FeMoO 4 . Furthermore, the tribofilm also exhibits a layered structure with different chemical compositions, in which the sulfur in the body tribofilm mainly exists in the form of S 2− , SO 3 2− and SO 4 2− , while the sulfur in the subsurface of the tribofilm is mainly composed of S 2− and SO 4 2− . Our findings might pave the way for exploiting the multifunctional and environmentally-friendly lubricating materials.
A surface-enhanced Raman spectroscopy (SERS) based method was developed for the quantification of Cd 2+ in rice. Gold nano-particles (AuNPs) modified with trimercaptotriazine served as a ratiometric SERS probe for the detection of Cd 2+ . A conical holed substrate was used to further enhance SERS signals, and hence to improve the sensitivity. A calibration model based on the spectral shape deformation quantitative theory was employed to mitigate the influence of variations in the number and distribution of “hot spots”. The proposed SERS method was applied to quantitative analysis of Cd 2+ in three types of rice, and achieved satisfactory quantitative results with accuracy comparable to that of the reference method—inductively coupled plasma mass spectrometry. The limit of detection of the proposed method was estimated to be 8 μg kg −1 . The proposed SERS method has the potential to become a fast screening method for the detection of Cd 2+ in rice.
The introduction of additives into desulfurization slurry may inhibit the mercury re-emission from slurry and improve the stabilization of mercury in slurry. In this paper, the effect of common additives, such as sodium sulfide (Na 2 S), 2,4,6-trimercaptotriazine trisodium (TMT-18), sodium dithiocarbamate (DTCR-2) and Fenton reagent, on mercury distribution in gas–liquid–solid phase was investigated under typical operating conditions. Meanwhile, the effect of different additive dosages on the inhibition performance of mercury re-emission was studied. Furthermore, the inhibition mechanisms of different additives were also discussed. The experimental results showed that Na 2 S, TMT-18, DTCR-2 and Fenton reagent could inhibit the mercury re-emission from desulfurization slurry and some mercury that might reemit into the gas phase before would be restrained in the solid phase. For additives such as Na 2 S, TMT-18 and DTCR-2, with the increase in additive dosages, the inhibition performances of mercury re-emission were improved, but the enhancing effects tended to level off. More mercury could be restrained in the solid phase by forming HgS, Hg-TMT and Hg-DTCR. However, for additives such as Fenton reagent, the inhibition performance of mercury re-emission was first increased and then decreased with the proportion of Fe 2+ and H 2 O 2 in Fenton reagent increasing. There existed an optimal proportion. The oxygenated free radical generated by Fenton reagent with Fe 2+ as catalysis was the main reason for the inhibition of mercury re-emission, and more mercury would be oxidized and then restrained in solid phase due to the formation of HgSO 4 and Fe(OH) 3 .
危险品化学品经营许可证（带存储）