User:Douglas M. Fox/Notebook/AU CHEM-571 F2011 Lab Support/2017/10/24

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Lab Tasks Filter, wash & dry clay samples Filter clay using 41 Whatman paper. If filtrate is opaque, stop and switch to 1.0 um filter paper Rinse clay with alternating 10 mL aliquots of water and ethanol 5 times (10 total washings) Spread clay on watchglass in a thin layer and dry in oven at 105 C until no moisture is visible Grind clay to a fine powder in a pestle & mortar Characterize clays Use small XRD sample holder and measure x-ray between 2 degrees and 50 degrees Measure IR of clay samples Prepare clay supported AuNP using each clay place 0.3 g of clay in a small glass vial add 3.4 x 10-5 mol HAuCl4 (3.4 mL of 10 mM HAuCl4) add 16.6 mL of water stir until solution changes color (overnight may be necessary) repeat for each clay sample Characterize Au/TiO2 grind Au/TiO2 using a pestle & mortar Use small XRD sample holder and measure x-ray between 2 degrees and 50 degrees Measure IR of clay samples Use Au/TiO2 to selectively oxidize an alcohol (choose one) i-propanol (j phys chem 93, 1989, 759) place 0.2 g of AuNP in 50 mL rbf add 0.5 g i-propanol and 4.5 g of distilled water fill a balloon with ~500 mL O2 by reacting 1/2 teas yeast with 10 mL 3% H2O2 in a flask with holed stopper place balloon on 50 mL rbf to introduce O2 into the reaction react for 2 hr remove O2 balloon & centrifuge to separate & recover Au/TiO2 save fluid for analysis next week if you have time, filter & wash Au/TiO2 using nylon 0.2 um filter glycerol (Science, 330, 2010, 74) place 0.2 g AuNP in 100 rbf add 1 g glycerol and 29 mL methanol add 0.75 g of NaOH place balloon on 100 mL rbf to introduce O2 into the reaction react for 2 hr remove O2 balloon & centrifuge to separate & recover Au/TiO2 save fluid for analysis next week if you have time, filter & wash Au/TiO2 using nylon 0.2 um filter