Research on the Stability of Pd-Based Multi-Component Supported Catalysts

2021 ◽  
Vol 871 ◽  
pp. 300-305
Author(s):  
Yong Li Zhang
Keyword(s):  
Waste Water ◽  
Organic Waste ◽  
Supported Catalysts ◽  
Catalytic Wet Oxidation ◽  
Characteristic Peak ◽  
Oxidation Treatment ◽  
Before And After ◽  
Ft Ir ◽  
The Stability

Based on SEM, FT-IR and XRD characterization, the catalyst Pd-Fe-Co-Ce/FSC (ratio 1:1:1:3) was calcined at a temperature of 550°C and a calcination time of 3 h. The catalyst is applied to the catalytic wet oxidation treatment of difficult-to-biodegradable organic waste-water. By the characterization of the catalyst before and after the reuse, it is verified that the SEM morphologis of the catalyst changed little, and the groups contained in the catalyst characterized by FT-IR hardly changed, and the XRD characteristic peaks did not change. From the SEM photos of the catalyst before and after use, the morphology of the catalyst does not change much, and the agglomerated support on the catalyst surface is slightly reduced; the absorption peaks of the FI-IR spectrum of the catalyst before and after use are not significantly different, indicating that the functional groups contained in the catalyst have not changed significantly; After using the catalyst, compared with before use, the characteristic peak shape of each characteristic diffraction did not change significantly. The results show that the catalyst Pd-Fe-Co-Ce/FSC (ratio 1:1:1:3) revealed a stable catalyst performance in the process of CWAO for the treatment of difficult-to-biodegradable organic waste-water.

The Study and Characterization of a Novel Structure of 1,3,5-Benzenetricarboxylic Acid

2013 ◽  
Vol 830 ◽  
pp. 202-206
Author(s):  
Hai Yan Tan ◽  
Cheng Liu ◽  
Jin Ping Wu
Keyword(s):  
Relevant Information ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
X Ray ◽  
Novel Structure ◽  
Ft Ir ◽  
Benzenetricarboxylic Acid ◽  
The Stability ◽  
Lamella Structure

A novel ten-interpenetrating structure of 1,3,5-benzenetricarboxylic acid was grown under solvothemal condition after heated it 16 hours. It was characterized by FT-IR, HNMR, X-ray diffraction, HRTEM. HRTEM obtain the relevant information of structural morphologies. The result of HRTEM showsed this material owned special lamella structure. X-ray diffraction showed the crystal of the new structure is of monoclinic system, space groupP1 with a=26.5039(17), b=16.4121(17),c=26.550(2)Å,α=90.00, β=91.533(2), γ=90.00, V=11544.4(17)Å3, Z=8, Dc=1.451g/cm3,μ=0.126mm-1,F(000)=5184, R=0.0891 and w (R)=0.1819 for 11318 observed reflection with I>2(I),hydrogen bond contributed to the stability of the structure. The fluorescence spectra indicated that the title compound had two stronger emission peak at 346nm and 400nm. Keywords:1, 3, 5-benzenetricarboxylic acid; novel structure; ten-interpenetrating

scholarly journals Pembuatan Pupuk Organik Cair dari Limbah Pasar dengan Perbandingan Hasil Menggunakan Bioaktifator Air tahu dan EM4

2020 ◽  
Vol 1 (1) ◽  
pp. 15-23
Author(s):  
Lusi Anggraini ◽  
Vicky Anderesta Kuswoyo ◽  
Mutia Anissa Marsya
Keyword(s):  
Waste Water ◽  
Environmental Pollution ◽  
Organic Waste ◽  
Anaerobic Fermentation ◽  
Economic Value ◽  
Liquid Fertilizer

Liquid Fertilizers contain a lot of organic waste which has been decomposed and ready for consumption by plants. By utilizing the remaining vegetables, dried leaves and tofu, it is expected to increase the economic value of waste and reduce environmental pollution. Liquid fertilizer composted by anaerobic fermentation and carried out in a closed bucket (composter) with a comparison of bio-activator wastewater of tofu and EM4. The characterization of liquid fertilizer products was carried out by Nitrogen Analyzer, UV-vis spectroscopies, and AAS tools to test the levels of Nitrogen, Phosphor and Potassium respectively. The Result shown that the N total levels (0,38 %), Phosphor levels (0,06 %), and potassium levels (0,15%) of POC that made from waste water of tofu are higher than POCEM4.

Synthesis of new copolymers 4,4’-sulfinylbisphenol derivative with N-vinyl-2-pyrrolidone - photopolymerization and thermo-mechanical studies

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Beata Podkościelna ◽  
Andrzej Bartnicki ◽  
Barbara Gawdzik
Keyword(s):  
Liquid System ◽  
Diglycidyl Ether ◽  
Epoxy Compound ◽  
Mechanical And Thermal Properties ◽  
Before And After ◽  
Triethylbenzylammonium Chloride ◽  
Ft Ir ◽  
Two Phases ◽  
New Compounds

AbstractSynthesis, structure and characterization of the new sulfur monomer sulfinylbis[benzene-4,1-diyl(oxy-2-hydroxypropane-3,1-diylmethacrylate)] (SO.DM) and its photopolymerization with N-vinyl-2-pyrrolidone (NVP) are presented. SO.DM was obtained in the three-step reaction. In the first step, 4,4’- sulfinylbisphenol from 4-[(4-hydroxyphenyl)thio]phenol was obtained. In the second step the epoxy compound was synthesized. It was obtained in the reaction of 4,4’- sulfinylbisphenol with 2-(chloromethyl)oxirane in the two phases liquid/liquid system including organic and aqueous phases. In the third step, ring opening of the obtained diglycidyl ether was carried out with the use of methacrylic acid in the presence of triethylbenzylammonium chloride (TEBAC) as a catalyst. Structures of new compounds were confirmed by spectroscopic methods (FT-IR, 1H and 13CNMR and DIP-MS). Photopolymerization of compositions containing different ratios of the monomers (SO.DM and NVP) and an initiator (Irgacure 651) was carried out. The following properties (before and after curing) were determined: density, polymerization shrinkage, glass transition temperature, Young’s modulus, hardness, tensile strength. Moreover, dynamic-mechanical and thermal properties were studied.

scholarly journals Mechanical Properties and Weathering Behavior of Polypropylene-Hemp Shives Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Marcel Ionel Popa ◽  
Silvia Pernevan ◽  
Cecilia Sirghie ◽  
Iuliana Spiridon ◽  
Dorina Chambre ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Degradation ◽  
Accelerated Weathering ◽  
Ir And Raman Spectroscopies ◽  
Before And After ◽  
Ft Ir ◽  
Main Components ◽  
Poly Propylene ◽  
Ir And Raman

This paper presents the obtaining and the characterization of composites with polypropylene matrix and hemp shives as filler in different ratios and containing poly(propylene)-co maleic anhydride (MAH-PP) 3% wt as compatibility agent. The weathering behavior of the composite enclosing 60% hemp shives, performed after the exposure to UV radiations at different exposure times, was evaluated. The changes in the chemical and morphological structures were investigated by FT-IR and RAMAN spectroscopies and AFM microscopy. The mechanical characteristics of the composites were determined before and after an artificial aging process, and they are within the limits of the values reported for polyolefin-based composites and materials with natural fillers. During the accelerated weathering process, the correlation between the chemical degradation of the main components of the composite and the modification of the mechanical properties after the process of aging has been observed.

scholarly journals Fabrication and characterization of Zn doped CuO nanofiber using newly designed nanofiber generator for the photodegradation of methylene blue from textile effluent

2018 ◽  
Vol 36 (3) ◽  
pp. 520-529 ◽  
Author(s):  
Ramasamy Gopalsamy Sethuraman ◽  
Thangamuthu Venkatachalam ◽  
Selvaraj Dinesh Kirupha
Keyword(s):  
Methylene Blue ◽  
Copper Oxide ◽  
Copper Acetate ◽  
Average Crystallite Size ◽  
Blue Shift ◽  
X Ray Diffraction ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Ft Ir ◽  
The Stability

AbstractHigh aspect ratio, Zn doped copper oxide (Zn-CuO) nanofibers have been fabricated employing a newly designed electrospun coating unit using copper acetate, sodium hydroxide and polyethylene glycol in aqueous state. The prepared Zn doped copper oxide (Zn-CuO) nanofibers were sintered at 400 °C, 500 °C and 600 °C separately and characterized using X-ray diffraction XRD, Fourier transformation infrared spectroscopy FT-IR, scanning electron microscopy SEM, energy dispersive spectroscopy EDS. The average crystallite size was in the range of 28 nm to 30 nm. Optical properties of Zn-CuO nanofibers were analyzed using UV-DRS studies which showed a blue shift in the absorption band. An increase in band gap with the increase in postannealing temperature was observed due to the blue shift in absorption edge of CuO causing enhanced photodegradation. The catalytic properties of the CuO nanofibers were tested using methylene blue in aqueous medium. The influences of parameters responsible for high photodegradation were optimized and the rate of the photodegradation process was calculated using photodegradation kinetics. The reusability test was conducted to find the stability of the fabricated Zn-CuO nanofibers.

scholarly journals Preparation and Characterization of poly-aniline hydrochloride (PANI-HCL) Nano-composites by Radiation

2019 ◽  
Vol 27 (2) ◽  
pp. 27-37
Author(s):  
Moamar H. Idan ◽  
Raheem G. Kadhim
Keyword(s):  
Electrical Conductivity ◽  
Polymer Mixture ◽  
Prepared Film ◽  
Casting Method ◽  
Aniline Hydrochloride ◽  
Color Changes ◽  
Before And After ◽  
Ft Ir ◽  
Poly Aniline

      During this search, the polymer poly-aniline hydrochloride (PANI-HCL)  was prepared with different weights before and after irradiation in the form of films using the casting method. The films were recorded with the cobalt element(CO60), which sends a gama (1.2) Mev for a period of (72) hours. The structural properties of the (FT-IR) were studied. The results showed that the active groups of the recorded polymer were consistent with the chemical composition and topographic study of the prepared film surfaces. The images showed that the recorded polymer is homogeneous and its color changes after irradiation.       The electrical properties included the measurement of the hall effect and the continuous electrical conductivity and the behavior of the current and voltages where the results showed that the Hall coefficient of the polymer mixture recorded before and after the irradiation are carriers of the (n-type) and through the measurement of current- voltages show results that the polymer recorded conduct the behavior of ohmic before irradiation and walk Conduction of a semiconductor after irradiation. In addition, the results of electrical conductivity were shown to be less after irradiation.

scholarly journals Sintesis Nanopartikel Kitosan-tripolifosfat menggunakan Metode Gelasi Ionik

2019 ◽  
Vol 19 (2) ◽  
pp. 155
Author(s):  
Risnawati Risnawati ◽  
Mohammad Wijaya M ◽  
Hasri Hasri
Keyword(s):  
Water Content ◽  
Freeze Drying ◽  
Chitosan Nanoparticles ◽  
Chitosan Solution ◽  
Acid Synthesis ◽  
Ionic Gelation ◽  
Chitosan Nanoparticle ◽  
Before And After ◽  
Ft Ir ◽  
The Stability

ABSTRAK Penelitian ini bertujuan untuk mensintesis nanopartikel kitosan menggunakan metode gelasi ionik. Tahapan sintesis meliputi: pembuatan larutan kitosan 0,2% menggunakan asam sitrat 5%, sintesis Nanopartikel Kitosan dengan Na-TPP sebagai pengikat silang, dilanjutkan dengan uji kestabilan nanopartikel menggunakan spektrofotometer UV-Vis. Hasil sintesis nanopatikel dikarakterisasi menggunakan FT-IR, PSA dan uji kadar air. Hasil penelitian menunjukkan bahwa suspensi nanopartikel kitosan-TPP tetap stabil selama penyimpanan 1 hari dan setelah freeze drying diperoleh serbuk berwarna putih dengan kadar air sebesar 7,25%. Hasil Karakterisasi FT-IR mengindikasikan bahwa sintesis nanopatikel telah terbentuk, hal ini dapat dilihat terjadinya pergeseran puncak serapan gugus fungsi sebelum dan setelah terbentuk nanopartikel kitosan. Hasil analisis PSA diperoleh ukuran partikel sebesar 7270,9 nm. Berdasarkan hal tersebut disimpulkan bahwa sintesis nanopartikel kitosan dapat dilakukan dengan metode gelasi ionik dengan kestabilan selama satu hari. Kata kunci: Gelasi ionik, Kitosan-TPP, Nanopartikel ABSTRACT This experiment aimed to synthesize of chitosan nanoparticles using ionic gelation method. Synthesis stages include: preparation of 0.2% chitosan solution using 5% citric acid, synthesis chitosan nanoparticles with Na-TPP as crosslinker, followed by a test of the stability of the nanoparticles using UV-Vis spectrophotometer. The results of synthesis nanopaticles were characterized using FT-IR, PSA and test water content. The results showed that the nanoparticles of chitosan-TPP suspension remained stable for 1 day storage time and after freeze drying obtained in the form white powder with a water content of 7.25%. Characterization of FT-IR results indicate that the synthesis nanopaticles been formed, it can be seen a shift of the absorption peak of functional groups before and after the formation of chitosan nanoparticles. PSA analysis results obtained that particle size at 7270.9 nm. Based on this it was concluded that synthesis of chitosan nanoparticle can be performed with ionic gelation method with stability during one day. Keywords: Gelasi ionic, Chitosan-TPP, Nanoparticles

Synthesis and Characterization of an Aminated D-Glucose and its Stability of Cu2+Complex

2011 ◽  
Vol 197-198 ◽  
pp. 65-68 ◽  
Author(s):  
Qiang Qiang Liao ◽  
Yi Jiu Li ◽  
Bo Xiang
Keyword(s):  
Uv Spectra ◽  
Ultraviolet Region ◽  
Buffer Solution ◽  
Nmr Spectrum ◽  
Esi Ms ◽  
H Nmr ◽  
Ft Ir ◽  
The Stability ◽  
Complex Ratio

An aminated D-glucose [N,N'-di-b-D-glucopyranosyl ethylenediamine] was prepared and thoroughly characterized by FT-IR, ESI-MS, NMR spectra and elemental analysis. Compared with D-glucose, the FT-IR spectrum of the aminated glucose showed a moderate peak at 1629~1608 cm-1which was attributed to dNH vibration, suggesting glucose reacted to ethylenediamine (en). The ESI-MS spectrum exhibited a strong peak atm/z383.2, which was assigned to the species [C14H27O10N2]-. The1H-NMR spectrum of the aminated D-glucose demonstrated the signal of the C1proton and the amino proton at 4.82~4.79ppm, illustrating the amino of ethylenediamine was substituted for the hydroxy group of C1. As for UV spectra, the aminated glucose hadn’t absorbance in the ultraviolet region while its complex with Cu2+had obvious absorption peak at about 236nm. The complex ratio of the aminated glucose to Cu2+was close to 1:1 and the stability constant of its Cu2+complex was 6.8*107in 0.01mol×L-1borax buffer solution.

Characterization of Optical and Structure Properties of Polydimethylsiloxanes

2015 ◽  
Vol 827 ◽  
pp. 99-104 ◽  
Author(s):  
Hanif Sulistiya Nusa ◽  
Widi Astuti ◽  
Arief Sjamsulaksan Kartasasmita ◽  
Rova Virgana ◽  
Norman Syakir ◽  
...  
Keyword(s):  
Silicone Oil ◽  
Vitreoretinal Surgery ◽  
High Viscosity ◽  
Light Spectrum ◽  
Low Viscosity ◽  
Vis Spectroscopy ◽  
Before And After ◽  
Ft Ir ◽  
Structure Properties

Polydimethylsiloxanes (PDMS), (CH3)3SiO-[Si(CH3)2O]n-Si(CH3)3, known as silicone oil is a tamponade liquid which is very important in vitreoretinal surgery, especially in the treatment of complicated retinal detachment. Here, we investigated the optical properties and structure of silicone oil with high viscosity silicone oil of 5500 cSt and low viscosity silicone oil of 1300 cSt in order to understand the changing of physical properties of silicone oil before and after using in vitreoretinal surgery as a tamponade liquid and analyze the relationship between the tamponade duration and changed in silicone oil properties. From UV-Vis spectroscopy and refractometer measurement, it is found some changes in transmittance and refractive index values in both silicone oil after using as a tamponade liquid. From fourier transform infrared (FT-IR) spectroscopy, some additional of functional groups of N-H and O-H bond are observed at 1634.5 cm-1 and 3435.7 – 3764.5 cm-1, respectively. The changes of optical and structure properties of silicone oil after using as a tamponade liquid are assumed to be responsible in emulsification of silicone oil and affect the transmittance quality at visible light spectrum. However, in this study, there is no linear corelation between tamponade duration and changed in silicone oil properties.

scholarly journals Preparation and Characterization of a New Polymeric Multi-Layered Material Based K-Carrageenan and Alginate for Efficient Bio-Sorption of Methylene Blue Dye

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 411
Author(s):  
Chiraz Ammar ◽  
Fahad M. Alminderej ◽  
Yassine EL-Ghoul ◽  
Mahjoub Jabli ◽  
Md. Shafiquzzaman
Keyword(s):  
Methylene Blue ◽  
Sodium Alginate ◽  
Blue Dye ◽  
Experimental Conditions ◽  
Virgin Sample ◽  
Ft Ir ◽  
Ir Analysis ◽  
The Stability ◽  
Cellulose Surface

The current study highlights a novel bio-sorbent design based on polyelectrolyte multi-layers (PEM) biopolymeric material. First layer was composed of sodium alginate and the second was constituted of citric acid and k-carrageenan. The PEM system was crosslinked to non-woven cellulosic textile material. Resulting materials were characterized using FT-IR, SEM, and thermal analysis (TGA and DTA). FT-IR analysis confirmed chemical interconnection of PEM bio-sorbent system. SEM features indicated that the microspaces between fibers were filled with layers of functionalizing polymers. PEM exhibited higher surface roughness compared to virgin sample. This modification of the surface morphology confirmed the stability and the effectiveness of the grafting method. Virgin cellulosic sample decomposed at 370 °C. However, PEM samples decomposed at 250 °C and 370 °C, which were attributed to the thermal decomposition of crosslinked sodium alginate and k-carrageenan and cellulose, respectively. The bio-sorbent performances were evaluated under different experimental conditions including pH, time, temperature, and initial dye concentration. The maximum adsorbed amounts of methylene blue are 124.4 mg/g and 522.4 mg/g for the untreated and grafted materials, respectively. The improvement in dye sorption evidenced the grafting of carboxylate and sulfonate groups onto cellulose surface. Adsorption process complied well with pseudo-first-order and Langmuir equations.

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