Indonesian Journal of Pure and Applied Chemistry最新文献_第9页

SEMIKONDUKTOR BERBASIS TiO2-N/KAOLIN TERKALSINASI UNTUK DYE SENSITIZED SOLAR CELL (DSSC)

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2019-04-30 DOI: 10.26418/indonesian.v2i1.36944

Sabrina Maulidya Amir, Titin Anita Zahara, Risya Sasri, Winda Rahmalia

{"title":"SEMIKONDUKTOR BERBASIS TiO2-N/KAOLIN TERKALSINASI UNTUK DYE SENSITIZED SOLAR CELL (DSSC)","authors":"Sabrina Maulidya Amir, Titin Anita Zahara, Risya Sasri, Winda Rahmalia","doi":"10.26418/indonesian.v2i1.36944","DOIUrl":"https://doi.org/10.26418/indonesian.v2i1.36944","url":null,"abstract":"Semikonduktor TiO2 sebagai anoda dalam dye sensitized solar cell (DSSC) memiliki kelemahan yaitu hanya aktif bekerja pada radiasi sinar UV karena energi celah pita (Eg) TiO2 yang relatif besar yaitu 3,2 eV. Pada penelitian ini, dilakukan modifikasi untuk mengubah struktur elektronik TiO2, agar dapat menurunkan Eg. Dalam penelitian ini, TiO2 didoping menggunakan atom N dari NH4OH dan kaolin terkalsinasi (KT) yang disintesis dari kaolin Capkala. Beberapa parameter yang dibahas yaitu karakteristik TiO2-N/KT hasil pendopingan, penurunan energi celah pita dari semikonduktor, dan hubungan antara Eg dari semikonduktor terhadap randemen konversi energi maksimum DSSC yang dihasilkan. Dye yang digunakan dalam penelitian ini adalah ekstrak kayu secang. Difraktogram XRD TiO2-N/KT menunjukkan posisi 2θ = 25,2790o yang menunjukkan keberadaan TiO2 dan 2θ = 26,6090oyang menunjukkankeberadaan SiO2 dari kaolin terkalsinasi. Analisis dengan FTIR menunjukkan penyerapan pada bilangan gelombang 680 cm-1 yang menunjukkan vibrasi ikatan Ti-N dan 1036,77 cm-1 yang menandakan bahwa adanya vibrasi regangan asimetris O-Si-O dan O-Al-O. Terjadi penurunan Eg dari 3,2 eV (TiO2 murni) menjadi 3,03 eV (TiO2-N/KT). Penurunan energi celah pita sebanding dengan besarnya randemen konversi energi maksimum dari sel surya yang dihasilkan yaitu sebesar 1,048 %, menunjukkan performansi lebih baik dibanding dengan DSSC dengan komponen anoda TiO2 murni (0,661%)","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74919419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

KARAKTERISASI FLAVONOID DARI DAUN MUNDU (Garcinia dulcis [ROXB.] KURZ) SEBAGAI PENGOMPLEKS Pb (II) MUNDU叶(Garcinia dulcis [ROXB]的黄曲霉特性。库尔兹作为Pb级胶合板(II)

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2019-04-30 DOI: 10.26418/indonesian.v2i1.36946

Emilda Sari, Ari Widiyantoro, Gusrizal Gusrizal

{"title":"KARAKTERISASI FLAVONOID DARI DAUN MUNDU (Garcinia dulcis [ROXB.] KURZ) SEBAGAI PENGOMPLEKS Pb (II)","authors":"Emilda Sari, Ari Widiyantoro, Gusrizal Gusrizal","doi":"10.26418/indonesian.v2i1.36946","DOIUrl":"https://doi.org/10.26418/indonesian.v2i1.36946","url":null,"abstract":"Pb (II) merupakan salah satu zat beracun dan berbahaya. Keberadaannya dalam tubuh manusia dapat mengganggu sistem metabolisme tubuh. Penelitian ini bertujuan untuk mengkarakterisasi flavonoid yang diisolasi dari daun mundu (Garcinia dulcis) sebagai pengompleks logam Pb (II). Tahapan penelitian yang dilakukan meliputi persiapan sampel kemudian ekstraksi, isolasi, dan pemurnian senyawa menggunakan metode kromatografi vakum cair (KVC), kromatografi kolom gravitasi (KKG), dan kromatografi lapis tipis (KLT), sedangkan identifikasi senyawa dilakukan menggunakan spektroskopi ultraungu-tampak (UV-Vis) dan inframerah (IR) serta 1H-NMR. Penelitian ini telah berhasil memperoleh 6 fraksi gabungan dari KVC dan 6 fraksi gabungan dari proses KKG. Pada fraksi F4.1 dari KKG dilakukan pemurnian lebih lanjut dengan metode kromatografi lapis tipis (KLT) preparatif sehingga diperoleh 5 isolat. Pada isolat F4.1.3 dilakukan pengujian keberadaan flavonoid dengan uji fitokimia dan hasilnya positif mengandung fenolik dan flavonoid. Selanjutnya isolat tersebut dilakukan pengujian aktivitas pengompleks terhadap logam Pb (II) 100 ppm, 200 ppm dan 300 ppm. Berdasarkan hasil pengujian UV-Vis, isolat F4.1.3 terdapat dua pita pada 287 nm dan 291 nm yang menunjukkan adanya karakteristik senyawa flavonoid. Pergeseran batokromik dari 287 nm dan 291 menjadi 289 dan 293 nm ini setelah penambahan Pb (II) menunjukkan bahwa isolat memiliki kemampuan mengkompleks Pb (II). Hasil analisis spektra inframerah (IR) dan 1H-NMR diduga isolat F41.3 adalah senyawa 5,8,4’–trihidroksi-flavan.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85606017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

ANTIFUNGAL ACTIVITY OF METHANOL EXTRACT OF BLACK CUMIN SEEDS ON Aspergillus sp. 黑孜然种子甲醇提取物对曲霉的抑菌活性研究。

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-12-31 DOI: 10.26418/INDONESIAN.V1I2.30526

L. Rahman

引用次数: 0

DETEKSI KEBERADAAN BAKTERI RESISTEN LOGAM MERKURI (Hg) PADA PENAMBANGAN EMAS TANPA IZIN (PETI) DI SIMPI, SEKADAU, KALIMANTAN BARAT 在加里曼丹西部西皮塞达古的未经许可的黄金开采中发现汞耐金属细菌(Hg)的存在

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-12-31 DOI: 10.26418/INDONESIAN.V1I2.30529

A. Abdullah

引用次数: 1

GREEN SYNTHESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK DAUN PUCUK IDAT (Cratoxylum glaucum) SEBAGAI BIOREDUKTOR

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-12-31 DOI: 10.26418/indonesian.v1i2.30533

V. A. Fabiani, Febry Sutanti, Desti Silvia, M. A. Putri

引用次数: 9

EKSTRAKSI DAUN PELAWAN (Tristaniopsis merguensis)SEBAGAI ANTIOKSIDAN MENGGUNAKAN MICROWAVE ASSISTED EXTRACTION (MAE)

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-12-31 DOI: 10.26418/INDONESIAN.V1I2.30528

Sito Enggiwanto, Fusfita Istiqomah, Kasro Daniati, Occa Roanisca, Robby Gus Mahardika

{"title":"EKSTRAKSI DAUN PELAWAN (Tristaniopsis merguensis)SEBAGAI ANTIOKSIDAN MENGGUNAKAN MICROWAVE ASSISTED EXTRACTION (MAE)","authors":"Sito Enggiwanto, Fusfita Istiqomah, Kasro Daniati, Occa Roanisca, Robby Gus Mahardika","doi":"10.26418/INDONESIAN.V1I2.30528","DOIUrl":"https://doi.org/10.26418/INDONESIAN.V1I2.30528","url":null,"abstract":"Indonesia is a country that produces a wealth of abundant biodiversity, one of which is a plant that is often cultivated the tree of Pelawan (Tristaniopsis merguensis). Pelawan trees are widely spread in Indonesia one of them found in the forests of the Bangka Belitung island. Therefore, this study aims to identify the secondary metabolites and testing antioxidants in leaf of pelawan extract by comparing methods of Microwave Assisted Extraction (MAE) with maceration method. The resistant leaf used in this study was obtained from Sempan, Bangka Belitung. The observation result shows that the use of MAE method can extract with faster time compared with maceration method. So the MAE method is more effective than the maceration method. The using of MAE method for 30 minutes obtained the highest yield percentage of 41.3% in ethanol solvent which is more effective than acetone solvent. Extraction by using 48 hour maceration yields is 28.985%. While the extraction with 30 minute maceration is 13.385%. Testing of antioxidant activity using Microwave Assisted Extraction (MAE) method on acetone solvent has the highest antioxidant activity than ethanol extract that is 9,501 μg/mL. The use of the MAE method is more efficient in extracting the leaves of Pelawan than the maceration method when viewed from the time and antioxidant activity.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84155280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

PHYTOCHEMICAL SCREENING, ANTIOXIDANT, AND CYTOTOXICITY OF Zamioculcas zamiifolia ROOT EXTRACT 扎米根提取物的植物化学筛选、抗氧化及细胞毒性研究

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-12-31 DOI: 10.26418/INDONESIAN.V1I2.30530

R. Muharini, M. Masriani, R. Rudiyansyah

{"title":"PHYTOCHEMICAL SCREENING, ANTIOXIDANT, AND CYTOTOXICITY OF Zamioculcas zamiifolia ROOT EXTRACT","authors":"R. Muharini, M. Masriani, R. Rudiyansyah","doi":"10.26418/INDONESIAN.V1I2.30530","DOIUrl":"https://doi.org/10.26418/INDONESIAN.V1I2.30530","url":null,"abstract":"Zamioculcas zamiifolia is an ornamental plant that had been used pharmacologycally as a traditional medicine plant. The aims of this research were to investigate the phytochemistry of n-hexane, chloroform and methanol extracts from the roots of Z. zamiifolia and to evaluate their biological activities as antioxidant and cytotoxic. All extracts were screened phytochemically using specific reagents and TLC technique to reveal the major component of each extract. The chloroform was obtained as the highest quantity of extract which gave positive test for steroids and flavonoids. All extracts were tested for their antioxidant activity using DPPH method and for their cytotoxic activity against two types of human cancer cell lines, HepG2 and T47D, and normal African green monkey kidney ephitelial cell lines, Vero. The methanol and chloroform extract exhibited antioxidant activity with AA50 values of 180.0 and 431.5 µg/mL, respectively. Chloroform and methanol extracts showed potencial and moderate cytotoxicity towards T47D cell line with IC50 433.1 and 461.1µg/mL, respectively. None of the extracts was toxic against HepG2 and Vero cell lines.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73489654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

EKSTRAKSI DAN PENENTUAN GUGUS FUNGSI ASAM HUMAT DARI PUPUK KOTORAN SAPI 从牛粪中提取和测定腐蚀性脂肪酸的作用

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-07-23 DOI: 10.26418/indonesian.v1i1.26041

N. Nurlina, I. Syahbanu, Mirna Tersiana Tamnasi, Chyntia Nabela, Maria Desi Furnata

{"title":"EKSTRAKSI DAN PENENTUAN GUGUS FUNGSI ASAM HUMAT DARI PUPUK KOTORAN SAPI","authors":"N. Nurlina, I. Syahbanu, Mirna Tersiana Tamnasi, Chyntia Nabela, Maria Desi Furnata","doi":"10.26418/indonesian.v1i1.26041","DOIUrl":"https://doi.org/10.26418/indonesian.v1i1.26041","url":null,"abstract":"Cow manure fertilizer was used as raw material for the extraction of humic acid in this research. The aim of this research were extraction of humic acid from cow manure fertilizer, characterization of functional groups based on FTIR spectra, and determination of humic acid functional groups. Humic acid extraction from cow manure used 0.050 M; 0.100 M; 0.250 M dan 0.500 M KOH solution. A cow manure fertilizer were shaken with KOH solution for 1; 2; 4 and 6 h. The quantitative determination of oxygen-containing functional groups of humic acid was conducted by titrimetri. The FTIR spectrum showed the presence of –OH group and N-H stretching (bands 3361.46 cm-1); C-H aliphatic for CH2, CH3 (2946.52 cm-1 and 1442.24 cm-1); C=C aromatic components (1626.48 cm-1); COO- symmetric stretching (1521.71 cm-1); C-O stretching from –COOH (1229.74 cm-1). Total acidity value was 500 cmole.kg-1 (Baryta Absorption Method); carboxyl groups content was 250 cmole.kg-1 (Ca-Acetate Method); and phenol (OH) concentration was 250 cmole.kg-1. It can be concluded that humic acid successfully extracted from cow manure fertilizer using 0.250 KOH solution as extractant for 2 h, which has yield of 4.486% humic acid.","PeriodicalId":13554,"journal":{"name":"Indonesian Journal of Pure and Applied Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79328067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

KINETIKA DEGRADASI SELULOSA ASETAT DARI SABUT PINANG 槟榔的醋酸纤维素退行性退化

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-07-23 DOI: 10.26418/INDONESIAN.V1I1.26040

Intan Syahbanu, Annisa Anugraini, H. A. Melati

引用次数: 1

ANALISIS UKURAN PARTIKEL SILIKA HASIL EKSTRAKSI DARI BATU PADAS ASAL KABUPATEN KETAPANG KALIMANTAN BARAT

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2018-07-23 DOI: 10.26418/INDONESIAN.V1I1.26042

Risya Sasri, N. Nurlina, Lia Destiarti, I. Syahbanu

引用次数: 3