glycothermal synthesis of mixed metal oxides

... Trang 1doi:10.15625/2525-2518/57/5/13676 SYNTHESIS, CHARACTERIZATION AND PHOTOCATALYTIC ACTIVITY OF NOVEL MIXED METAL OXIDES/REDUCED GRAPHENE OXIDE HYBRID CATALYSTS Dang Nguyen ... approximately 80 % of 10 mg/L of Indigo carmine was degraded after 0.08 h of irradiation [3] The catalytic degradation in a Eu,C,N,S-ZrO2 (0.6 % Eu)/visible light achieved almost 100 % of 20 mg/L of Indigo ... of 69.9 mg/L of H2O2 and 5 mg/L Fe2+ after 30 min of visible light irradiation [1] The mineralization of Indigo carmine (20 mg/L) in TiO2/UV light system achieved about 23% after 60 minutes of

Ngày tải lên: 13/01/2020, 08:37

... trealment of exhaust gases Therefore, metallic oxides were choosen for investigation in this study The most active single metal oxides are the oxides of Cu, Co, Mn, and Ni Among all metal oxides ... based on metallic oxides active single metal oxides for combustion of VOCs arc the oxides of Cu, Co, Mn, and Ni ‘Some typical oxades will be mentioned in more detail, 1.3.3.1 Metallic oxides based ... comparison of catalytic activity of the obtained mixed oxide catalysts with the noble Nguyen The ‘Tien 36 Trang 392 EXPERIMENTAL 2.1 Synthesis of the catalysts 2.1.1 Sol-gel synthesis of mixed

Ngày tải lên: 05/06/2025, 14:06

... direction of both the Ag/WO3/Pt and Ag/WO3/FTO is opposite to that of the Ti/WO3/FTO structure Those resutls show that the influence of electrode materials on the resistance switching of WO3 thin ... Trang 66 ABSTRACT 300 nm-thick WOx thin films were deposited in mixed Ar + O2 gases by using dc reactive magnetron method from metallic W target The partial oxygen pressure is 45% and 90% The ... materials on the resistance switching of WO3 thin films Effects of the partial oxygen pressure (45% and 90%) on the resistive switching behavior of WO3 was also examined Results show that both 45% - WO3

Ngày tải lên: 23/01/2021, 10:37

... structure of mixed ligand complexes. 2.2 Mass spectra In the mass spectra of the mixed ligand metal complexes, peaks were attributable to the molecular ions: m/z: respectively Figure 3 Mass spectrum of ... different transition metals that formed different geometrical structures in the cavity of the macro cycle such as mixed ligand metal complex In the present study, Schiff base mixed ligand complexes ... g o v t r / c h e m / Research Article Synthesis, characterization, biological studies, and molecular modeling of mixed ligand bivalent metal complexes of Schiff bases based on N -aminopyrimidine-2-one/2-thione

Ngày tải lên: 12/01/2022, 23:35

... Article Synthesis of metal-free and metallophthalocyanines containing 18- and 21-membered macrocycles with mixed donor atoms and their metal-ion binding properties Halil Zeki G ¨ OK∗ Department of ... character-ization of a series of metal-free phthalocyanines and metallophthalocyanines containing 18- and 21-membered macrocycles with mixed donor atoms The effects of varying ring sizes of the macrocycle ... presence of soft donor atoms in the macrocyclic system enhanced the selective extraction for soft metal ions such as silver(I) and mercury(II).24−26 Several papers related to the synthesis of phthalocyanines

Ngày tải lên: 12/01/2022, 23:41

... Trang 1Part I Synthesis and Molecular Assemblies of d10 Metal Complexes Bearing 9, 10-Disubstituted Anthracene Ligand Part II Synthesis and Spectroscopic Studies of Heterobimetallic Platinum(II)-acetylide ... thesis Trang 3Table of Contents Acknowledgements……… i Table of Contents……… ii List of Abbreviations……….v Summary………vi Part I Synthesis and Molecular Assemblies of d 10 Metal Complexes ... utilizing metal-metal and/or - interactions for assembling molecules In the second part, to search for novel molecules of electronic and optical properties, spectroscopy of a series of heterobimetallic

Ngày tải lên: 15/09/2015, 17:10

... shape-controlled synthesis of noble metal nanocrystals 2.1.1 Nucleation and growth of metal nanocrystals Chemical synthesis of nanoparticles involves either decomposition or reduction of metal precursors ... Review 4 2.1 Shape-controlled synthesis of noble metal nanocrystals 4 2.1.1 Nucleation and growth of metal nanocrystals 4 2.1.2 Chemical methods for synthesis of metal nanocrystals with controlled ... fabricate nanostructures of most of metals Electrochemical method has been developed by many research groups.13-16 electro-Despite of its wide range of synthesis of metal nanoparticles, electrochemical

Ngày tải lên: 13/10/2015, 16:41

... characteristics of the effect of NH3 on MoO3 nanobelt Figure 5-5: Comparison of the effect of different chamber pressures of ammonia on the I-V characteristics Figure 5-6: Schematic of the synthesis of ... by the scratching the surface of MoO3 with AFM N (a) line profile of the edge of the nanobelts during the scratching process (b) Plot of sample height versus number of scans for different forces ... 4 days of heating (a) schematics of setup (b) SEM image of structure Figure 2-9: CNT substrate with 0.6mm spacer at 300oC after 3 days of heating (a) schematics of setup (b) SEM image of structure

Ngày tải lên: 16/10/2015, 15:37

... CHEMISTRY & APPLICATIONS OF METAL ORGANIC FRAMEWORKS 3 1.1 Definition of Metal Organic Framework 3 1.2 Applications of Metal-organic Frameworks 4 1.2.1 Applications of Metal organic Frameworks ... CHEMISTRY & APPLICATIONS OF ORGANIC FRAMEWORKS METAL-1.1 Definition of Metal Organic Frameworks Metal organic frameworks (MOFs) is the compound which are consisted of metal clusters and linker, ... 46 2.5.1 Synthesis of Fe-NH2BDC 46 2.5.2 Crystal Structures of Fe-NH2BDC 47 2.5.3 Characterization of Fe-NH2BDC 50 2.5.3.1 Microscope Image of Fe-NH2BDC 50 2.5.3.2 PXRD Analysis of Fe-NH2BDC

Ngày tải lên: 11/01/2017, 12:11

... humidity(RH≥90%).Remarkably,theultrahighprotonconductivityofVNU- 15wasmaintainedundertheseconditions,withoutanyappreciableloss,for40hours Trang 31.1 DefinitionofMetalorganicframeworks(MOFs) MOFsisthecompoundwhichareconsistedofmetalclustersandlinker,typically,polytopicorganiccarboxylateswasemployed,forexample,1,4- ... 4Traditionalheterogeneouscatalystsincludemetaloxides,polymerresin,silicagelandzeolites,forwhich,lowsurfaceareaofmetaloxides,polymerresina s wellast h e smallporeapertureofzeolite,p r e v e n t i n g t ... 6Chapter2:SynthesisoftheNovelMetal-OrganicFrameworksandCharacterizations 2.1 Introduction TheQuestofNovelMOFswithEnhancedPropertiesf o r SustainableApplica tions TheHighporosityo f MOFsa s wellast

Ngày tải lên: 20/01/2018, 22:55

... the synthesis of MOFs as well [18, 19] Despite these facts, only a few reports on the use of microwave synthesis of MOF–199 have been published [13] In the present paper, we carried out the synthesis ... loss of 7.6 %), and the final loss of 54.4 % starting at 300 °C was attributed to the decomposition of the metal-organic structure (theoretical loss of 48.3 %) Meanwhile, the TG curve of ST–MOF–199 ... carried out the synthesis of MOF–199 using a domestic microwave device at ambient temperature and pressure The solvothermal synthesis of MOF–199 was con-ducted for the sake of comparison 2 Experimental

Ngày tải lên: 12/01/2020, 02:19

... transition metal complexes in the treatment of cancer diseases Substitution of the ligand molecule and changes in the existing chemical structures leads to the synthesis of a wide range of transition metal ... metal complexes to penetrate into the lipid membranes and block the metal binding sites of enzymes of microorganisms The metal complexes also affect the protein synthesis and further growth of ... contains metals in them, some of which are presented in Fig. 1 In light of above, we herein reported the synthesis, antimi-crobial, anticancer and anticorrosion potentials of transi-tion metal complexes

Ngày tải lên: 29/05/2020, 13:25

... Materials synthesis 34 2.4.1 Synthesis of DUT-67 and DUT-67-Pro 34 2.4.2 Synthesis of DUT-136 and its derivatives 36 2.4.3 Synthesis of DUT-51 37 2.4.4 Synthesis of UiO-66 38 Trang 9 iv 2.4.5 Synthesis ... preferred in Zr-MOFs synthesis Together the modulation role in size, shape, and crystallinity of materials, the reproducibility of Zr-MOFs synthesis, affected by purity of organic ligands, metal sources, ... State of the art Trang 11 2 1.1 History of metal-organic framework As one of the most exciting porous solids, metal-organic frameworks (MOFs) have widely contributed to the great development of

Ngày tải lên: 25/01/2021, 23:49

... activity of three-way catalysts based on mixed metal oxides for the treatment of exhaust gases from internal combustion engine EXPERIMENTAL 2.1 Synthesis of the catalysts 2.1.1 Sol-gel synthesis of mixed ... oxidation The most active single metal oxides for combustion of VOCs are the oxides of Cu, Co, Mn, and Ni Some typical oxides will be mentioned in more detail 1.3.3.1 Metallic oxides based on CeO2 As ... catalytic activity of three-way catalysts based on mixed metal oxides for the treatment of exhaust gases from internal combustion engine CONTENT OF THESIS LIST OF TABLES LIST OF FIGURES INTRODUCTION...

Ngày tải lên: 12/05/2014, 17:14

... diacetate (10) 40 4.7 Synthesis of Folate-NHS (11) 41 4.8 Synthesis of Folate-DOTA (13) 42 4.9 Synthesis of Folate-DO3tBu (12) 43 4.10 Synthesis of Mannich Salt (14) 46 4.11 Synthesis of Bis-disulfide ... Bis-disulfide (15) 47 4.12 Synthesis of Bis-sulfone (16) 48 4.13 Synthesis of Bromoethyl-bis-sulfide (18) 50 4.14 Synthesis of Piperazine-bis-sulfide (23) 52 4.15 Synthesis of Tert-butyl 4-(2-aminoethyl) ... department of NUS for giving me the opportunity to undertake this project i Table of Contents TABLE OF CONTENTS Acknowledgements i Table of Contents ii List of Figures v List of Schemes vi Index of Abbreviations...

Ngày tải lên: 16/10/2015, 11:57

... reactivity of these substrates with mixed- metal clusters To date there have been no reports on the reactivity of osmium-iridium mixed- metal clusters with chalcogenides In continuation of our reactivity ... absence of TMNO It was also found that a 1:2.6:2.6 ratio of 3c: TMNO:Ph3PSe was required to ensure completion of reaction of 3c; reducing the ratio of TMNO or Ph3PSe resulted in recovery of large ... P(7)-Os(4)-Os(2) = 173.39(6)º The molecular structure of 26 consists of a spiked-triangular array of metal atoms The iridium spike does not lie in the plane of the Os3 triangle The two selenium atoms act...

Ngày tải lên: 16/09/2015, 08:30

... introduction to ligands and substrates As the focus of the research is on the synthesis and reactivity of mixed metal carbonyl clusters, a short review of some of the ligands like CO, hydrides, and cyclopentadienyls ... transition metals and chalcogen ligands have been argued to serve as useful models and precursors for the synthesis of new materials [39, 40] Figure 1.9 shows the cluster core structure of the mixed metal ... systems has created a resurgence of interest in the study of mixed metal clusters, in particular those of groups and For example, it has been shown that the carbonylation of methanol to give acetic...

Ngày tải lên: 16/09/2015, 08:32

... molecular structure of consists of a tetrahedral metal core, with six metal- metal bonds as expected from polyhedral skeletal electron pair theory (PSEPT) for a 60 electron metal cluster compound ... Reaction of Cp*Ir(CO)2 with Os3(CO)10(CH3CN)2 The mixed- metal cluster Cp*IrOs3(CO)11, has been isolated in 20% yield by the reaction of Os3(CO)10(CH3CN)2, 6, with Cp*Ir(CO)2, 2a The IR spectrum of ... fragmentation with the formation of Ru3(CO)12 and Cp*Ir(CO)2 indicating that the metal- metal bonds in these clusters are not very strong (Scheme 2.5) This type of break down of cluster skeleton was previously...

Ngày tải lên: 16/09/2015, 08:32

... disposed parallel to the “hinge” metal metal bond of the butterfly, and the alkyne interacts with all four metal atoms Wing tip metal atoms C π π M π C σ σ M' M π M Hinge metal atoms Figure 3.1 M3M’C2 ... some of the reactions of tetrahedral mixed metal clusters with alkynes It can be seen that most heterometallic tetrahedral clusters reacted with alkynes to afford butterfly clusters Most of these ... Reaction of 3a with MeCCBut Thermal reaction of 3a with 4, 4-dimethyl 2-pentyne afforded red crystals of 10c, with IR spectroscopic characteristics similar to those of 10a and 10b The identity of 10c...

Ngày tải lên: 16/09/2015, 08:32

... sites in heterometallic tetrahedral clusters Studies on metalloselectivity of these clusters have revealed that the selectivity could be influenced by factors such as the nature of the metals and ... Figure 4.3 Isomeric structures of [Ru3Ir(μ-H)3(CO)11(PPh3)] Table 4.1 summarizes the preferred site of substitution of phosphines for various tetrahedral mixed- metal clusters reported in the ... 4.2 Substitution type reactions of Cp*IrOs3(μ-H)2(CO)10, 3c It is evident from the foregoing that clusters containing mixed metals are of interest as sites to probe metallo selectivity and site...

Ngày tải lên: 16/09/2015, 08:32