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All Journal Jurnal Inovasi Pendidikan Kimia JOURNAL OF NATURAL SCIENCES AND MATHEMATICS RESEARCH
Mulyatun -, Mulyatun
Prodi Tadris Kimia, Jurusan Tadris, Fakultas Tarbiyah IAIN Walisongo Semarang Jl. Prof. Hamka (Kampus II), Ngaliyan, Semarang
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Mathematics

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The Effect of Vanadium Oxide on The Catalytic Activity of Titanium Silicalite in Conversion of Benzene to Phenol -, Mulyatun
JOURNAL OF NATURAL SCIENCES AND MATHEMATICS RESEARCH 2015: JNSMR Volume 1 Issue 1 Year 2015
Publisher : Fakultas Ilmu Tarbiyah dan Keguruan, UIN Walisongo

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Abstract

Phenol is one of the most important intermediate for petrochemical, agrochemical, and plastics industries. Almost 95% phenol is produced using cumene method. Cumene method is a multi-stage process with many disadvantages including the difficulties to gain phenol product in maximum quantities and production of co-product such as acetone which has great amount in market nowadays. One of the alternative routes to produce phenol which has more advantages is through benzene hydroxylation reaction using H2O2 as oxidant agent and Titanium Silikalit-1 (TS-1) as catalyst. TS-1 catalyst has high catalytic activity and selectivity in selective oxidation reaction of aromatic compounds with H2O2 which important for commercial industries. However, the reaction rate is tend to be low because TS-1 has hydrophobic nature and as the result H2O2 adsorption which has hydrophilic nature towards active sites of TS-1 is also become slower. Addition of metal oxide V2O5 could enhance hydrophilicity of TS-1 catalyst. Liquid phase catalytic benzene hydroxylation using hydrogen peroxide as oxidant was carried out over vanadium (V) oxide-modified TS-1 catalyst (V2O5/TS-1), that were prepared by impregnation method using vanadium methavanadate as precursor and characterized by X-ray diffraction, infrared spectroscopy, nitrogen adsorption, pyridine adsorption, and hydrophilicity techniques
LABORATORIUM KIMIA VIRTUAL: ALTERNATIF PEMBELAJARAN KIMIA UNTUK MENINGKATKAN HASIL BELAJAR MAHASISWA TADRIS KIMIA IAIN WALISONGO SEMARANG -, Mulyatun
Jurnal Inovasi Pendidikan Kimia Vol 7, No 1 (2013): January 2013
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Abstract

The objectives of this study were to describe the efectiveness of using virtual chemistry laboratory to improve the chemistry students’ learning. The subjects of this study were the students at grade I of Tadris Kimia IAIN Walisongo Semarang in the academic year of 2011/2012.The subjects was 40 students. The research uses cluster random sampling technique. Class TK-IA is chosen as experimental class (the students who are taught using virtual chemistry laboratory), and class TK-IB is chosen as control class (the students who are not taught using virtual chemistry laboratory). The result showed that the average score for eksperimental class is 31,4 for the pre test and 74,4 for the post test. While the average for control class is 31,6 for the  pre test and 62,2 for the post test. The calculation using the t-test showed the value of the t-test is higher than the value of the t-table.the value of t-test is 4,332 while the value oft-table on alpha 5% is 2,02 (4,332>2,02). It can be concluded that there is a significant difference in student’s learning between students who are taught using virtual chemistry laboratory than students who are not taught without it. So, we can conclude that using virtual chemistry laboratory is effective to improve the chemistry students’ learning.
LABORATORIUM KIMIA VIRTUAL: ALTERNATIF PEMBELAJARAN KIMIA UNTUK MENINGKATKAN HASIL BELAJAR MAHASISWA TADRIS KIMIA IAIN WALISONGO SEMARANG -, Mulyatun
Jurnal Inovasi Pendidikan Kimia Vol 7, No 1 (2013): January 2013
Publisher : Universitas Negeri Semarang

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Abstract

The objectives of this study were to describe the efectiveness of using virtual chemistry laboratory to improve the chemistry students’ learning. The subjects of this study were the students at grade I of Tadris Kimia IAIN Walisongo Semarang in the academic year of 2011/2012.The subjects was 40 students. The research uses cluster random sampling technique. Class TK-IA is chosen as experimental class (the students who are taught using virtual chemistry laboratory), and class TK-IB is chosen as control class (the students who are not taught using virtual chemistry laboratory). The result showed that the average score for eksperimental class is 31,4 for the pre test and 74,4 for the post test. While the average for control class is 31,6 for the  pre test and 62,2 for the post test. The calculation using the t-test showed the value of the t-test is higher than the value of the t-table.the value of t-test is 4,332 while the value oft-table on alpha 5% is 2,02 (4,332>2,02). It can be concluded that there is a significant difference in student’s learning between students who are taught using virtual chemistry laboratory than students who are not taught without it. So, we can conclude that using virtual chemistry laboratory is effective to improve the chemistry students’ learning.
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