SOME CHARACTERISTICS OF HUMIC MATERIALS IN CARIBBEAN VERTISOLS

1983 ◽  
Vol 63 (2) ◽  
pp. 151-159 ◽  
Author(s):  
M. B. HOLDER ◽  
S. M. GRIFFITH
Keyword(s):  
Functional Groups ◽  
Fulvic Acids ◽  
Comparative Investigation ◽  
High Reactivity ◽  
Spectrophotometric Analysis ◽  
Humic Materials ◽  
Dta Analysis ◽  
Metal Organic ◽  
The Caribbean ◽  
Organic Matter Fractions

A comparative investigation of the analytical features of organic matter fractions of acidic and calcium-saturated Vertisols (Ca-Vertisols) from the Caribbean was undertaken. The elemental composition and functional group content of the humic acids (HAs) and fulvic acids (FAs) were similar to previously reported values, except for the low yielding HAs of Ca-Vertisols which contained a greater proportion of O (35.82–47.17%). In addition, high values (8.38 meq/g–11.71 meq/g) for the COOH functional groups of the FAs emphasized the inherent high reactivity of the humic materials. Spectrophotometric analysis supported the view arrived at through chemical analysis that metal-organic (FA) complexes of Vertisols contained Al, Fe and Si with more soluble complexes in the Ca-Vertisols and in the presence of a basic cation (Ca). DTA analysis indicated that the organo-mineral complexes of Vertisols were regular and thermostable. Key words: Vertisols, humic materials, functional groups, infrared, DTA

scholarly journals Obtaining humic materials by mechanochemical reduction

2021 ◽  
Vol 340 ◽  
pp. 01001
Author(s):  
Natalya Yudina ◽  
Elizaveta Linkevich ◽  
Anna Saveleva ◽  
Oleg Lomovsky
Keyword(s):  
Mechanical Activation ◽  
Functional Groups ◽  
Fulvic Acids ◽  
Carboxyl Groups ◽  
Hydroxyl Groups ◽  
Humic And Fulvic Acids ◽  
Humic Materials ◽  
Spectral Coefficients ◽  
Mechanochemical Modification

In the study, a mechanochemical modification of peat was carried out, leading to an increase in the number of functional groups and an increase in the solubility of humic complexes with metals. It was shown that the mechanical activation of peat in the presence of Zn significantly increased the yield of extractable fulvic acids. An analysis of the spectral coefficients showed that humic and fulvic acids extracted from peat were characterized by an increased content of alcohol hydroxyl groups, C–O carbohydrate moieties, and carboxyl groups.

Multiple functional groups in metal–organic frameworks and their positional regioisomerism

2021 ◽  
Vol 438 ◽  
pp. 213892
Author(s):  
Dopil Kim ◽  
Minjung Kang ◽  
Hyeonbin Ha ◽  
Chang Seop Hong ◽  
Min Kim
Keyword(s):  
Functional Groups ◽  
Metal Organic Frameworks ◽  
Metal Organic

A comparative study of the effect of functional groups on C2H2 adsorption in NbO-type metal–organic frameworks

2017 ◽  
Vol 4 (6) ◽  
pp. 960-967 ◽  
Author(s):  
Fengli Chen ◽  
Dongjie Bai ◽  
Xia Wang ◽  
Yabing He
Keyword(s):  
Comparative Study ◽  
Functional Groups ◽  
Metal Organic Frameworks ◽  
Metal Organic

A comparative study of the effect of functional groups on C2H2 adsorption was performed in NbO-type metal–organic frameworks.

Incorporation of CuO NPs into modified UiO-66-NH2 metal–organic frameworks (MOFs) with melamine for catalytic C–O coupling in the Ullmann condensation

2017 ◽  
Vol 41 (20) ◽  
pp. 12014-12027 ◽  
Author(s):  
Samira Sadeghi ◽  
Mohammad Jafarzadeh ◽  
Amir Reza Abbasi ◽  
Kim Daasbjerg
Keyword(s):  
Functional Groups ◽  
Metal Organic Frameworks ◽  
Synthetic Approach ◽  
Cuo Nps ◽  
Metal Organic

The UiO-66-NH2 is initially modified with melamine via a post-synthetic approach. CuO NPs are then anchored via the available functional groups on the surface of the modified MOF.

Two-dimensional coordination polymers and metal–organic gels of symmetrical and unsymmetrical dipyridyl β-diketones: luminescence, dye absorption and mechanical properties

2016 ◽  
Vol 40 (3) ◽  
pp. 1997-2006 ◽  
Author(s):  
Kaustuv Banerjee ◽  
Kumar Biradha
Keyword(s):  
Mechanical Properties ◽  
Functional Groups ◽  
Coordination Polymers ◽  
Two Dimensional ◽  
Dye Absorption ◽  
Metal Organic

The ligands containing chelating as well as exodentate functional groups were shown to form functional coordination polymers and heterometallic gels.

A comparative investigation of H2 adsorption strength in Cd- and Zn-based metal organic framework-5

2008 ◽  
Vol 129 (16) ◽  
pp. 164104 ◽  
Author(s):  
Pornjuk Srepusharawoot ◽  
C. Moysés Araújo ◽  
Andreas Blomqvist ◽  
Ralph H. Scheicher ◽  
Rajeev Ahuja
Keyword(s):  
Metal Organic Framework ◽  
Comparative Investigation ◽  
H2 Adsorption ◽  
Metal Organic ◽  
Organic Framework

A series of europium-based metal organic frameworks with tuned intrinsic luminescence properties and detection capacities

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 111934-111941 ◽  
Author(s):  
Pengda Yi ◽  
Hongliang Huang ◽  
Yaguang Peng ◽  
Dahuan Liu ◽  
Chongli Zhong
Keyword(s):  
Functional Groups ◽  
Metal Organic Frameworks ◽  
Luminescence Properties ◽  
Intrinsic Luminescence ◽  
Metal Organic

A series of europium-based metal organic frameworks with different functional groups showed tuned intrinsic luminescence properties and detection capacities.

scholarly journals Progress of MOF-Derived Functional Materials Toward Industrialization in Solar Cells and Metal-Air Batteries

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 897
Author(s):  
Mohamed Elhousseini Hilal ◽  
Abdelkhalk Aboulouard ◽  
Abdul Rehman Akbar ◽  
Hussein A. Younus ◽  
Nesrin Horzum ◽  
...  
Keyword(s):  
Photovoltaic Cells ◽  
Functional Materials ◽  
High Reactivity ◽  
Life Cycles ◽  
Advanced Materials ◽  
Conversion Materials ◽  
Metal Organic ◽  
Power Outputs ◽  
Electrical Demand ◽  
The Cost

The cutting-edge photovoltaic cells are an indispensable part of the ongoing progress of earth-friendly plans for daily life energy consumption. However, the continuous electrical demand that extends to the nighttime requires a prior deployment of efficient real-time storage systems. In this regard, metal-air batteries have presented themselves as the most suitable candidates for solar energy storage, combining extra lightweight with higher power outputs and promises of longer life cycles. Scientific research over non-precious functional catalysts has always been the milestone and still contributing significantly to exploring new advanced materials and moderating the cost of both complementary technologies. Metal-organic frameworks (MOFs)-derived functional materials have found their way to the application as storage and conversion materials, owing to their structural variety, porous advantages, as well as the tunability and high reactivity. In this review, we provide a detailed overview of the latest progress of MOF-based materials operating in metal-air batteries and photovoltaic cells.

Sign in / Sign up

Export Citation Format

Share Document