RESUMO
Using an ultrasound-assisted chemical technique, ZnO quantum dot and ZnO composites were created. The optical characteristics and structural details of these composites were examined using TEM, XRD, XPS, FT-IR, UV-vis, and BET. The results revealed that both the ZnO quantum dot composite and ZnO composite exhibited outstanding optical properties, making them suitable for photocatalytic reactions. In order to analyze the photocatalytic performance, a degradation experiment was conducted using Rhodamine B solution as the simulation dye wastewater. The experiment demonstrated that the degradation of Rhodamine B followed the first-order reaction kinetics equation when combined with the photocatalytic reaction kinetics. Moreover, through cyclic stability testing, it was determined that the ZnO QDs-GO-g-C3N4 composite sample showed good stability and could be reused. The degradation rates of Rhodamine B solution using ZnO-GO-g-C3N4 and ZnO QDs-GO-g-C3N4 reached 95.25% and 97.16%, respectively. Furthermore, free-radical-trapping experiments confirmed that ·O2- was the main active species in the catalytic system and its photocatalytic mechanism was elucidated. The photocatalytic oxidation of ZnO quantum dots in this study has important reference value and provides a new idea for the subsequent research.
RESUMO
OBJECTIVE: To explore the effects of harmful factors in tank cabins on renal function of tank crews. METHODS: One hundred and fifty two tank crews as the observation group and 37 soldiers without tank environment exposure as control group were selected in the study. α1-microglobulin(α1-MG), ß2-microglobulin(ß2-MG), IgG, N-acetyl-ß-glucosidase (NAG) and urinary albumin excretion rate (UAER) in morning and 24 h urine were measured. RESULTS: Compared to the control group, the levels of α1-MG, ß2-MG, NAG, UAER in observation group were increased significantly (P < 0.05). ß2-MG, NAG, UAER of Soldiers with more than 50 motorized hours in observation group were significantly higher than those of control group (P < 0.05). ß2-MG, NAG and UAER of soldiers divorced from tank occupation more than 3 years decreased to the normal levels. ß2-MG of soldiers divorced from tank occupation more than 10 years was significantly higher than that of 6-10 years group. CONCLUSION: Tank occupational exposure influences the renal function of tank crews but not to a degree of clinical kidney disease. The renal function of crews divorced from tank occupation may recover but dysfunction of renal tubular reabsorption still exists.
