Abstract: A preparation method and an application of a tailings-based zeolite@carbon dots-titanium dioxide (CDs-TiO2) composite photocatalyst are provided, which relates to the field of solid waste utilization technologies. The preparation method includes performing an acidification treatment on tailings powder and then roasting to obtain modified tailings powder; adding the modified tailings powder and titanium dioxide into lye to obtain mixed suspension; stirring and aging the mixed suspension under ultraviolet irradiation to obtain an aged suspension, performing a hydrothermal reaction on the aged suspension to obtain a product, filtering, washing and drying the product to obtain the tailings-based zeolite@CDs-TiO2 composite photocatalyst.

Abstract: A wirelessly controlled electrically driven shooting target system(s) that can transition from concealed position to ready position and then back to concealed position. It can be used in a variety of shooting environments. The shooting target apparatus includes the following main components: Mainhouseing with base, interchangeable target holder, TTP130 gearbox, camshaft, double torsion spring (DTS), leaf spring, main housing meshing gear, four magnets, wireless receiver and the remote goes with it. According to one embodiment, activation of drive mechanism to active the camshaft compress DTS, then magnets attracting and disconnection to cause movement of the target holder, the key mechanism is reserve potential energy and fast conversion of kinetic energy from potential energy, which achieved by magnets attracting and disconnection.

Abstract: A wirelessly controlled electrically driven shooting target system(s) that can transition from concealed position to ready position and then back to concealed position. It can be used in a variety of shooting environments. The shooting target apparatus includes the following main components: Main houseing with base, interchangeable target holder, TTP130 gearbox, camshaft, double torsion spring (DTS), leaf spring, main housing meshing gear, four magnets, wireless receiver and the remote goes with it. According to one embodiment, activation of drive mechanism to active the camshaft compress DTS, then magnets attracting and disconnection to cause movement of the target holder, the key mechanism is reserve potential energy and fast conversion of kinetic energy from potential energy, which achieved by magnets attracting and disconnection.