[ABSTRAK
Modifikasi permukaan suatu material saat ini sangat menarik untuk diamati.Pada penelitian ini, dilakukan modifikasi terhadap zeolit alam Indonesia dengannanobimetalik Cu dan Ni untuk katalis reduksi 4-nitrofenol. Nanobimetalikberhasil diimobilisasi ke dalam zeolit alam dengan mereduksi Cu2+ dan Ni2+dengan NaBH4. Katalis yang disintesis (zeolit@Ni, zeolit@Cu, zeolit@Cu@Ni,zeolit@Cu-Ni, dan zeolit@Ni@Cu) dapat membantu menurunkan absorbansispektrofotometer UV-Vis intermediet 4-nitrofenolat. Didapatkan hasil penelitiandengan urutan aktivitas katalis 75 mg zeolit@Ni@Cu > 100 mg zeolit@Cu-Ni >75 mg zeolit@Cu@Ni > 75 mg zeolit@Cu untuk mereduksi 4-nitrofenol dengankonsentrasi 8,60x10-5 M, sedangkan zeolit@Ni tidak dapat mereduksi. Didapatkanjuga nilai tetapan laju reaksi sejati (k) untuk masing-masing katalis. Untukzeolit@Cu k= 0,0814 menit-1, zeolit@Cu@Ni k= 0,26 menit-1, zeolit@Cu-Ni k=0,118 menit-1, dan zeolit@Ni@Cu k=0,213 menit-1.
ABSTRACT
Surface modification of a material is very interesting to observe. In thisresearch, modification of Indonesian nature zeolite with bimetallic nanoparticleCu and Ni has done for the catalytic reduction of 4-nitrophenol. Bimetallicnanoparticles have been successfully immobilized into natural zeolite afterreducing the immobilized Cu2+ and Ni2+ with NaBH4. The synthesized catalysts(zeolit@Ni, zeolit@Cu, zeolit@Cu@Ni, zeolit@Cu-Ni, and zeolit@Ni@Cu)could decreased the intermediate 4-nitophenolate using UV-Vis absorbance. Theexperiments showed the order catalytic activity as followed 75 mg zeolit@Ni@Cu> 100 mg zeolit@Cu-Ni > 75 mg zeolit@Cu@Ni > 75 mg zeolit@Cu to reduce 4-nitrophenol with the concentration is 8.6 x 10-5 M, while zeolit@Ni was notactive. The obtained value of the reduction rate constants for each catalysts. Werezeolit@Cu k= 0.0814 menit-1, zeolit@Cu@Ni k= 0.26 menit-1, zeolit@Cu-Ni k=0.118 menit-1, and zeolit@Ni@Cu k=0.213 menit-1., Surface modification of a material is very interesting to observe. In thisresearch, modification of Indonesian nature zeolite with bimetallic nanoparticleCu and Ni has done for the catalytic reduction of 4-nitrophenol. Bimetallicnanoparticles have been successfully immobilized into natural zeolite afterreducing the immobilized Cu2+ and Ni2+ with NaBH4. The synthesized catalysts(zeolit@Ni, zeolit@Cu, zeolit@Cu@Ni, zeolit@Cu-Ni, and zeolit@Ni@Cu)could decreased the intermediate 4-nitophenolate using UV-Vis absorbance. Theexperiments showed the order catalytic activity as followed 75 mg zeolit@Ni@Cu> 100 mg zeolit@Cu-Ni > 75 mg zeolit@Cu@Ni > 75 mg zeolit@Cu to reduce 4-nitrophenol with the concentration is 8.6 x 10-5 M, while zeolit@Ni was notactive. The obtained value of the reduction rate constants for each catalysts. Werezeolit@Cu k= 0.0814 menit-1, zeolit@Cu@Ni k= 0.26 menit-1, zeolit@Cu-Ni k=0.118 menit-1, and zeolit@Ni@Cu k=0.213 menit-1.] |
S56892-Kiki Baihaki.pdf :: Unduh