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The friction coefficient and wear resistance of non-smooth surface with different conditions are studied in this work. First, the effects of groove spacing on the friction behavior and wear resistance of the non-smooth surface are investigated. Second, the effects of massive laser shock peening (LSP) impact on the dry sliding wear performance of the non-smooth surface manufactured by laser surface texture (LST) are evaluated. In addition, the worn surfaces and typical microstructure in the top surface layer of all samples were characterized by field emission scanning electron microscope (SEM) with an EDS elemental analysis and transmission electron microscopy (TEM). The influence process of groove spacing and LSP on the friction behavior and wear resistance of T9 tool steel are also analyzed and discussed.

The Ag/AgCl/g-C 3 N 4 composites were prepared by in situ oxidation process. During the process, the prefabricated Ag nanoparticles well dispersed on the surface of g-C 3 N 4 employed as a template and oxidized by FeCl 3 to form the Ag/AgCl core–shell structure. The resultant samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (IR) spectroscopy and UV–vis diffuse-reflection spectra (DRS). As a kind of visible-light-driven plasmonic photocatalysts, the Ag/AgCl/g-C 3 N 4 with the Ag/AgCl amount of 2.7 at% achieved the best photocatalytic activity for the methyl orange (MO) dye degradation. The photocatalytic degradation rate was 6.77 and 6.27 times as that of the g-C 3 N 4 and Ag/g-C 3 N 4 composites. The results indicated that the cooperative or synergistic effects between Ag/AgCl and g-C 3 N 4 was existed which facilitated the separation of photo-induced electron–hole pairs and enhanced the photoactivity. Based on the results, a possible visible-light photocatalytic degradation mechanism was also discussed.