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ABSTRAKModifikasi permukaan suatu material saat ini sangat menarik untuk diamati.
Pada penelitian ini, dilakukan modifikasi terhadap zeolit alam Indonesia dengan
nanobimetalik Cu dan Ni untuk katalis reduksi 4-nitrofenol. Nanobimetalik
berhasil 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 absorbansi
spektrofotometer UV-Vis intermediet 4-nitrofenolat. Didapatkan hasil penelitian
dengan 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 dengan
konsentrasi 8,60x10-5 M, sedangkan zeolit@Ni tidak dapat mereduksi. Didapatkan
juga nilai tetapan laju reaksi sejati (k) untuk masing-masing katalis. Untuk
zeolit@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.
ABSTRACTSurface modification of a material is very interesting to observe. In this
research, modification of Indonesian nature zeolite with bimetallic nanoparticle
Cu and Ni has done for the catalytic reduction of 4-nitrophenol. Bimetallic
nanoparticles have been successfully immobilized into natural zeolite after
reducing 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. The
experiments 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 not
active. The obtained value of the reduction rate constants for each catalysts. Were
zeolit@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 this
research, modification of Indonesian nature zeolite with bimetallic nanoparticle
Cu and Ni has done for the catalytic reduction of 4-nitrophenol. Bimetallic
nanoparticles have been successfully immobilized into natural zeolite after
reducing 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. The
experiments 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 not
active. The obtained value of the reduction rate constants for each catalysts. Were
zeolit@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.]