LaNiO3 Perovskite Synthesis through the EDTA–Citrate Complexing Method and Its Application to CO Oxidation

A series of LaNiO3 materials were synthesized by the EDTA–citrate complexing method, modifying different physicochemical conditions. The LaNiO3 samples were calcined between 600 and 800 °C and characterized by XRD, SEM, XPS, CO-TPD, TG, DT, and N2 adsorption. The results evidence that although all the samples presented the same crystal phase, LaNiO3 as expected, some microstructural and superficial features varied as a function of the calcination temperature. Then, LaNiO3 samples were tested as catalysts of the CO oxidation process, a reaction never thoroughly analyzed employing this material. The catalytic results showed that LaNiO3 samples calcined at temperatures of 600 and 700 °C reached complete CO conversions at ~240 °C, while the sample thermally treated at 800 °C only achieved a 100% of CO conversion at temperatures higher than 300 °C. DRIFTS and XRD were used for studying the reaction mechanism and the catalysts’ structural stability, respectively. Finally, the obtained results were compared with different Ni-containing materials used in the same catalytic process, establishing that LaNiO3 has adequate properties for the CO oxidation process.

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Facile Preparation of Mesoporous MCM-48 Containing Silver Nanoparticles with Fly Ash as Raw Materials for CO Catalytic Oxidation

Micromachines ◽

10.3390/mi12070841 ◽

2021 ◽

Vol 12 (7) ◽

pp. 841

Author(s):

Dong Tian ◽

Yonghong Chen ◽

Xiaoyong Lu ◽

Yihan Ling ◽

Bin Lin

Keyword(s):

Silver Nanoparticles ◽

Fly Ash ◽

Co Oxidation ◽

Surface Composition ◽

Raw Materials ◽

Silica Source ◽

Co Conversion ◽

Co Catalytic Oxidation ◽

Adsorption Desorption

An environmentally friendly method was proposed to prepare mesoporous Mobil Composition of Matter No.48 (MCM-48) using fly ash as the silica source. Silver nanoparticles were infiltrated on MCM-48 facilely by an in situ post-reduction method and evaluated as an effective catalyst for CO oxidation. The as-prepared MCM-48 and Ag/MCM-48 nanoparticles were characterized by XRD, N2 adsorption/desorption, and TEM. Investigations by means of XPS for Ag/MCM-48 were performed in order to illuminate the surface composition of the samples. Studies revealed the strong influence of the loading of Ag nanoparticles on catalysts in the oxidation of CO. CO conversion values for Ag/MCM-48 of 10% and 100% were achieved at temperatures of 220 °C and 270 °C, respectively, indicating that the Ag-decorated MCM-48 catalyst is extremely active for CO oxidation.

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Pengaruh Perbedaan Konsentrasi Ekstrak Sargassum sp. dan Lama Penyimpanan terhadap Oksidasi Lemak pada Fillet Ikan Patin (Pangasius sp.)

Jurnal Ilmu Lingkungan ◽

10.14710/jil.15.1.64-73 ◽

2017 ◽

Vol 15 (1) ◽

pp. 64 ◽

Cited By ~ 1

Author(s):

Fatin Hidayati ◽

Y.S Darmanto ◽

Romadhon Romadhon

Keyword(s):

Lipid Oxidation ◽

Research Method ◽

Storage Time ◽

Oxidation Process ◽

Phenol Content ◽

Flavonoid Content ◽

High Fat ◽

Materials Used ◽

And Storage ◽

Phenolic And Flavonoid

ABSTRAKIkan patin merupakan ikan air tawar yang mengandung lemak dan protein tinggi sehingga apabila dilakukan penyimpanan rentan terjadi oksidasi yang mengakibatkan ketengikan. Sargassum sp. dengan kandungan fenol dan flavonoid mampu menghambat terjadinya oksidasi pada fillet ikan patin. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan ekstrak Sargassum sp. dan lama penyimpanan dalam menghambat terjadinya oksidasi pada fillet ikan patin. Materi yang digunakan dalam penelitian ini adalah ekstrak Sargassum sp. dan fillet ikan patin. Metode penelitian yang digunakan adalah experimental laboratories dengan menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan 2 faktor yaitu konsentrasi ekstrak Sargassum sp. (0%, 1%, 1,5% dan 2%) dan lama penyimpanan (hari ke-0, hari ke-2, hari ke-4, dan hari ke-6. Hasil penelitian menunjukkan bahwa perbedaan penambahan konsentrasi ekstrak Sargassum sp. dan lama penyimpanan memberikan pengaruh nyata terhadap nilai PV, nilai TBA, kadar lemak, kadar protein, kadar air serta organoleptik (P < 0,05). Hasil penelitian tahap I didapatkan rendemen Sargassum sp. dengan pelarut etanol 96% sebesar 1,39%, kandungan fenol 1,813%, flavonoid 0,278% dan aktivitas antioksidan 99,1659 ppm (kuat). Hasil penelitian tahap II didapatkan nilai PV berkisar antara 2,03 - 19,82 meq/kg, nilai TBA 0,63 - 6,72 mg.mal/kg. Konsentrasi 1,5% merupakan konsentrasi terbaik ekstrak Sargassum sp. dalam menghambat oksidasi lemak pada fillet ikan patin selama penyimpanan.Kata kunci: Antioksidan, Ekstrak Sargassum sp., Lama Penyimpanan, Oksidasi lemak, Fillet Ikan patinABSTRACTCatfish is a freshwater fish that contain high fat and protein so that if its stored it will susceptible to oxidation process which leads to rancidity. Sargassum sp. with its phenolic and flavonoid content are able to inhibit the oxidation process in catfish fillet. This research was aimed to know the effects of different concentrations of Sargassum sp. extracts and storage time in inhibiting the oxidation process in catfish fillet. The materials used in this research were Sargassum sp. extracts and catfish fillet. This research was using experimental laboratories research method with factorial Completely Randomized Research Design (CRD) of 2 factors which were concentrations of Sargassum sp. extracts (0%, 1%, 1.5%, and 2%) and storage time (0 day, 2 days, 4 days, and 6 days). The results showed that the adding of different concentrations of Sargassum sp. extracts and storage time gave significant effect to the PV value, TBA value, fat content, protein content, moisture content, as well as organoleptic point (P < 0.05). The results obtained from stage I research were the yields of Sargassum sp. with ethanol 96% solvent was 1.39%, phenol content was 1.813%, flavonoid was 0.278%, and antioxidant activity was 99.1659 ppm (categorized as strong antioxidant). The results obtained from stage II research were the PV value were ranged from 2.03 to 19.82 meq/kg, TBA value were ranged from 0.63 to 6.72 mg.mal/kg. The 1.5% concentration was the best concentration of Sargassum sp. extracts in inhibiting the lipid oxidation of catfish fillet during storage.Keywords: Antioxidant, Sargassum sp. Extracts, Storage Time, Lipid Oxidation, Catfish FilletCitation: Hidayati, F., Darmanto, Y.S. dan Romadhon. (2017). Pengaruh Perbedaan Konsentrasi Ekstrak Sargassum sp. dan Lama Penyimpanan terhadap Oksidasi Lemak pada Fillet Ikan Patin (Pangasius sp.). Jurnal Ilmu Lingkungan, 15(1), 64-73, doi:10.14710/jil.15.1.64-73

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Electrocatalytic selective oxidation of ethylene glycol: a concise review of catalyst development and reaction mechanism with comparison to thermocatalytic oxidation process

Current Opinion in Electrochemistry ◽

10.1016/j.coelec.2021.100929 ◽

2021 ◽

pp. 100929

Author(s):

Ji Qi ◽

Ziying An ◽

Chuang Li ◽

Xiao Chen ◽

Wenzhen Li ◽

...

Keyword(s):

Reaction Mechanism ◽

Ethylene Glycol ◽

Selective Oxidation ◽

Oxidation Process ◽

Catalyst Development ◽

Concise Review

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PENGARUH PERBEDAAN KONSENTRASI EKSTRAK Sargassum sp. DAN LAMA PENYIMPANAN TERHADAP OKSIDASI LEMAK PADA FILLET IKAN PATIN (Pangasius sp.) (The Effect of Different Concentrations Extract Sargassum sp. and Storage Time of Lipid Oxidation at Catfish (Pangasius sp.))

SAINTEK PERIKANAN Indonesian Journal of Fisheries Science and Technology ◽

10.14710/ijfst.12.2.116-123 ◽

2017 ◽

Vol 12 (2) ◽

pp. 116

Author(s):

Fatin Hidayati ◽

Y.S. Darmanto Y.S. Darmanto ◽

Romadhon Romadhon

Keyword(s):

Lipid Oxidation ◽

Research Method ◽

Storage Time ◽

Oxidation Process ◽

Phenol Content ◽

Flavonoid Content ◽

High Fat ◽

Materials Used ◽

And Storage ◽

Phenolic And Flavonoid

ABSTRAK Ikan patin merupakan ikan air tawar yang mengandung lemak dan protein tinggi sehingga apabila dilakukan penyimpanan rentan terjadi oksidasi yang mengakibatkan ketengikan. Sargassum sp. dengan kandungan fenol dan flavonoid mampu menghambat terjadinya oksidasi pada fillet ikan patin. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan ekstrak Sargassum sp. dan lama penyimpanan dalam menghambat terjadinya oksidasi pada fillet ikan patin. Materi yang digunakan dalam penelitian ini adalah ekstrak Sargassum sp. dan fillet ikan patin. Metode penelitian yang digunakan adalah experimental laboratories dengan menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan 2 faktor yaitu konsentrasi ekstrak Sargassum sp. (0%, 1%, 1,5% dan 2%) dan lama penyimpanan (hari ke-0, hari ke-2, hari ke-4, dan hari ke-6. Hasil penelitian menunjukkan bahwa perbedaan penambahan konsentrasi ekstrak Sargassum sp. dan lama penyimpanan memberikan pengaruh nyata terhadap nilai PV, nilai TBA, kadar lemak, kadar protein, kadar air serta organoleptik (P<0,05). Hasil penelitian tahap I didapatkan rendemen Sargassum sp. dengan pelarut etanol 96% sebesar 1,39%, kandungan fenol 1,813%, flavonoid 0,278% dan aktivitas antioksidan dengan Ic 50 sebesar 99,1659 ppm (kuat). Hasil penelitian tahap II didapatkan nilai PV berkisar antara 2,03–19,82 meq/kg, nilai TBA 0,63–6,72 mg.mal/kg. Konsentrasi 1,5% merupakan konsentrasi terbaik ekstrak Sargassum sp. dalam menghambat oksidasi lemak pada fillet ikan patin selama penyimpanan. Kata kunci: Antioksidan, Ekstrak Sargassum sp., Lama Penyimpanan, Oksidasi lemak, Fillet Ikan patin ABSTRACT Catfish is a freshwater fish that contain high fat and protein so that if its stored it will susceptible to oxidation process which leads to rancidity. Sargassum sp. with its phenolic and flavonoid content are able to inhibit the oxidation process in catfish fillet. This research was aimed to know the effects of different concentrations of Sargassum sp. extracts and storage time in inhibiting the oxidation process in catfish fillet. The materials used in this research were Sargassum sp. extracts and catfish fillet. This research was using experimental laboratories research method with factorial Completely Randomized Research Design (CRD) of 2 factors which were concentrations of Sargassum sp. extracts (0%, 1%, 1.5%, and 2%) and storage time (0 day, 2 days, 4 days, and 6 days). The results showed that the adding of different concentrations of Sargassum sp. extracts and storage time gave significant effect to the PV value, TBA value, fat content, protein content, moisture content, as well as organoleptic point (P < 0.05). The results obtained from stage I research were the yields of Sargassum sp. with ethanol 96% solvent was 1.39%, phenol content was 1.813%, flavonoid was 0.278%, and antioxidant activity was 99.1659 ppm (categorized as strong antioxidant). The results obtained from stage II research were the PV value were ranged from 2.03 to 19.82 meq/kg, TBA value were ranged from 0.63 to 6.72 mg.mal/kg. The 1.5% concentration was the best concentration of Sargassum sp. extracts in inhibiting the lipid oxidation of catfish fillet during storage. Keywords: Antioxidant, Sargassum sp. Extracts, Storage Time, Lipid Oxidation, Catfish Fillet

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Low-temperature CO oxidation over nanosized Fe–Co mixed oxide catalysts: Effect of calcination temperature and operational conditions

Chemical Engineering Science ◽

10.1016/j.ces.2013.02.002 ◽

2013 ◽

Vol 94 ◽

pp. 237-244 ◽

Cited By ~ 44

Author(s):

Abolfazl Biabani-Ravandi ◽

Mehran Rezaei ◽

Zohreh Fattah

Keyword(s):

Low Temperature ◽

Co Oxidation ◽

Calcination Temperature ◽

Mixed Oxide ◽

Oxide Catalysts ◽

Operational Conditions ◽

Mixed Oxide Catalysts ◽

Low Temperature Co Oxidation

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Stability improvement of Au/Fe–La–Al2O3 catalyst via incorporating with a FexOy layer in CO oxidation process

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2013.01.056 ◽

2013 ◽

Vol 138-139 ◽

pp. 104-112 ◽

Cited By ~ 18

Author(s):

Caixia Qi ◽

Shudong Zhu ◽

Huijuan Su ◽

Hui Lin ◽

Rengui Guan

Keyword(s):

Co Oxidation ◽

Oxidation Process ◽

Al2o3 Catalyst

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Atomically dispersed Au catalysts supported on CeO2 foam: controllable synthesis and CO oxidation reaction mechanism

Nanoscale ◽

10.1039/c7nr06665a ◽

2017 ◽

Vol 9 (43) ◽

pp. 16817-16825 ◽

Cited By ~ 20

Author(s):

Hao Wang ◽

Jianhua Shen ◽

Jianfei Huang ◽

Tengjing Xu ◽

Jingrun Zhu ◽

...

Keyword(s):

Reaction Mechanism ◽

Co Oxidation ◽

Oxidation Reaction ◽

Co Adsorption ◽

Controllable Synthesis ◽

Co Oxidation Reaction

The Au atoms on CeO2 foam are a more stable site for CO adsorption on the catalysts.

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The effect of defects on the catalytic activity of single Au atom supported carbon nanotubes and reaction mechanism for CO oxidation

Physical Chemistry Chemical Physics ◽

10.1039/c7cp03793g ◽

2017 ◽

Vol 19 (33) ◽

pp. 22344-22354 ◽

Cited By ~ 13

Author(s):

Sajjad Ali ◽

Tian Fu Liu ◽

Zan Lian ◽

Bo Li ◽

Dang Sheng Su

Keyword(s):

Carbon Nanotubes ◽

Density Functional Theory ◽

Catalytic Activity ◽

Carbon Nanotube ◽

Reaction Mechanism ◽

Co Oxidation ◽

Density Functional ◽

Functional Theory ◽

Single Walled Carbon Nanotube ◽

Wales Defect

The mechanism of CO oxidation by O2 on a single Au atom supported on pristine, mono atom vacancy (m), di atom vacancy (di) and the Stone Wales defect (SW) on single walled carbon nanotube (SWCNT) surface is systematically investigated theoretically using density functional theory.

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