[1] Univ Malaya, Nanotechnol & Catalysis Res Ctr NanoCat, Inst Postgrad Studies, Kuala Lumpur 50603, Malaysia
[2] Univ Putra Malaysia, Catalysis Sci & Technol Res Ctr PutraCat, Fac Sci, Upm Serdang 43400, Selangor, Malaysia
[3] Int Islamic Univ Malaysia, Dept Chem, Ctr Fdn Studies, Jalan Univ, Petaling Jaya 46350, Selangor, Malaysia