Judul: Sintesis Dan Karakterisasi Komposit Tio2/Nanopartikel Karbon (C-Dot) Dan Aplikasinya Sebagai Fotokatalis Untuk Degradasi Perkloroetilena.
Abstrak: Komposit TiO2/C-dot disintesis dengan metoda sol-gel dan telah diselidiki sebagai katalis untuk degradasi fotokatalitik senyawa pencemar perkloroetilena (PCE). Sifat fotoluminesens ditunjukkan dari analisis visual menggunakan lampu UV (365 nm), dan produk hasil sintesis dikarakterisasi menggunakan difraksi sinar-X (XRD), Fourier Transform Infrared (FTIR), spektrofotometer fluoresens, Scanning Electron Mocroscope (SEM) dan spektrofotometer UV-Vis. Hasil analisis XRD dan FTIR menunjukkan bahwa C-dot terikat secara fisik dalam TiO2. C-dot tidak kehilangan sifat fluoresensnya walaupun dikomposit dengan TiO2. C-dot dapat menurunkan nilai energi celah pita optik TiO2 dalam komposit TiO2/C-dot sehingga memperlebar jangkauan serapan TiO2 dan meningkatkan aktivitas fotolatalitik TiO2. Degradasi PCE 0.1% (v/v) dalam fasa cair telah diselidiki di bawah sinar matahari selama 2 jam. Efektivitas fotodegradasi ditentukan menggunakan kromatografi gas. Komposit TiO2/C-dot 2.5% (b/b) berhasil mendegradasi PCE di bawah sinar matahari dan efektivitas fotodegradasi mencapai 89.45%.
Keyword: Komposit TiO2/C-dot, fotokatalitik, degradasi, perkloroetilena.

Judul: Degradasi Zat Warna Metil Jingga menggunakan Fotokatalis Komposit TiO2/ZnO/CuO
Abstrak: Komposit TiO2/ZnO/CuO disintesis menggunakan metode sol-gel. Penelitian ini bertujuan menyintesis, mengkarakterisasi, dan mengukur kinerja komposit TiO2/ZnO/CuO sebagai fotokatalis degradasi zat warna metil jingga. Hasil penelitian sintesis komposit menggunakan metode sol-gel dapat terbentuk. Aktivitas fotokatalis dari komposit TiO2/ZnO/CuO dilakukan dengan variasi konsentrasi 10, 30 dan 50 mg/L dan dengan variasi waktu, yaitu 10, 20, 40, 50 dan 60 menit untuk mendegradasi zat warna metil jingga dibawah sinar UV dan sinar tampak. Hasil penelitian memiliki efektivitas sebesar 53% dibawah sinar UV dengan perbandingan komposit 1:1:0,3 dan 1:1:3 pada waktu ke-40 menit konsentrasi metil jingga 10 mg/L dan sebesar 48% dibawah sinar tampak dengan perbandingan komposit 1:1:0,3 pada konsentrasi metil jingga 10 mg/L diwaktu ke-20 menit. Karakterisasi menggunakan FTIR menunjukkan adanya serapan khas dari gugus fungsi TiO2, ZnO dan CuO serta ikatan dari komposit TiO2/CuO/ZnO., The TiO2/ZnO/CuO composite was synthesized using the sol-gel method. This study aims to synthesize, characterize, and measure the performance of TiO2/ZnO/CuO composites as photocatalysts for the degradation of methyl orange dye. The results of composite synthesis research using the sol-gel method can be formed. The photocatalyst activity of the TiO2/ZnO/CuO composite was carried out with various concentrations of 10, 30 and 50 mg/L and with variations of time, namely 10, 20, 40, 50 and 60 minutes to degrade the methyl orange dye under UV and visible light. The results showed an effectiveness of 53% under UV light with a composite ratio of 1:1:0,3 and 1:1:3 at the 40th minute with a methyl orange concentration of 10 mg/L and 48% under visible light with a composite ratio of 1:1:0,3 at methyl orange concentration of 10 mg/L in the 20th minute. Characterization using FTIR showed that there was a typical absorption of the TiO2, ZnO, and CuO functional groups and bonds from the TiO2/CuO/ZnO composite.
Keyword: Composite, Concentration, Degradation, Methyl orange, Time

Judul: Amfibi sebagai satwa peliharaan: Ekspor, Impor dan Perdagangan Domestik
Abstrak: Indonesia has exported amphibian as frozen frog legs (listed since 1969 under fishery product) for consumption and live amphibian (listed since 1983 under reptilian class in forestry product) for pets. There are also live amphibian trading in local level i.e in markets and malls. This research aims to identify amphibian species exported and imported by investigating document from related administration and to identify amphibian species traded in domestic market by observation at Jakarta. Research is primarily conducted by processing quota data taken from Department of Forestry Republic of Indonesia database in Jakarta. Market observation was carried out in 18 locations (3 markets and 15 malls) in Jakarta. I carried out interview with trader and export business, which related to net trading live amphibians for pets. Respondent was choosen using snowball sampling manner. Name of species is written according to Iskandar & Coljin (2000). If there is no such record in the checklist (for example species are from outside Indonesia), then the species name is written according to Frost (2004). There are 56 species from eight families of wild amphibians that have pets quota between 1998-2008. Nineteen species was traded since 1983. The highest export quota is Litoria caerulea (21,37%). Allocation of highest catching quota is for BKSDA Jayapura (20,40%) and BKSDA Papua Barat (18,96%). Four species are included in IUCN Red List categories as vulnerable, among others are Limnonectes macrodon, Meristogenys jerboa, Nyctixalus margaritifer and Rhacophorus margaritifer. The number of amphibians that have export realization are 39 species. Two species of amphibian, Leptobrachium hasseltii and Rhacophorus margaritifer are amphibian species whose been known infected by chytrid fungus in the wild. The biggest species exported is Litoria caerulea (54,34%). Between 1983-1991, the biggest import amphibian for pets from Indonesia (66,13%) is Netherlands. Number of quota was relative stable in the last eight years, where as the number of export realization is more fluctuates. Amphibian species imported and re-exported between 1983-2008 come from Africa, South Asia, Malaysian, Archipelago Oceania, North America, Central America and South America. The number of pet amphibian species traded at domestic market is less than exported. Data showed that Indonesia imports 15 amphibian species between 1983-2008, However I found different species in the market that was unrecorded in the Ministry of Forestry data, which is the Fire Belly Salamander.
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