Cu2+ doped ZnO by green synthesis was successfully prepared by using a combination of the Sol-Gel-Sonochemical method. Duck egg albumen was used as an additive, a substitute for chemical additives, such as monoethanolamine (MEA) and diethanolamine (DEA). Zn(CH3COO)2·2H2O was used as a precursor, Cu(CH3COO)2·H2O was used as a dopant source with concentrations of 5 wt.%, and isopropanol was used as the solvent. The addition of albumen variations was 10, 20, 30, 40, and 50 mL. The prepared catalyst was applied for the degradation of the methyl orange dyes by using photosonolysis with variations of the degradation time of methyl orange for 30, 60, 90, 120, 150, 180, and 240 min. FTIR spectra showed stretching at 400–550 cm–1 indicating the presence of Zn–O and Zn–O–Cu metal oxides. The optimum bandgap energy value was 2.82 eV with the addition of 30 mL of albumen. XRD analysis showed the optimum particle size of 16.62–53.21 nm after adding 30 mL of additives. The SEM image showed a spherical shape with an average diameter of 2.7 μm. The optimum percentage of degradation obtained was 94.88%, with the irradiation time under UV light for 210 min.

Training in increasing the competence of MGMP Chemistry teachers in 50 City Regencies in preparing students for the National Science Olympiad (OSN). The activity began with filling out a questionnaire for the readiness of the teachers in the learning process and pre-test to see the initial abilities of the MGMP Chemistry teachers in the City 50 District. After training in strengthening chemical materials and discussing HOTS questions in the fields of Analytical Chemistry, Organic Chemistry, Inorganic Chemistry, Physical Chemistry and Biochemistry, a post test was conducted to evaluate the achievement of the objectives of the activity. From the questionnaire given at the beginning of the activity it can be concluded that in general the teachers were ready for learning even though they were not used to the HOTS questions of the Olympic type questions. This is directly proportional to the pre-test results with an average value of 3.625 (scale 10). After the training of the teachers there was a significant increase which was shown by the results of the post test with an average of 5.5 (scale 10). As an evaluation material, at the end of the activity the satisfaction questionnaire was distributed and the results obtained were an average of a questionnaire of 3.47 (scale 4). Generally teachers complain about the lack of training time so that the absorption of the material provided is quite low.

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