scholarly journals Synthesis of Ni2P/CdS and Pt/TiO2 nanocomposite for photoreduction of CO2 into methanol

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Penumaka Nagababu ◽  
Sehba Anjum Mumtaz Ahmed ◽  
Y. Taraka Prabhu ◽  
Ankush kularkar ◽  
Subhamoy Bhowmick ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Solar Energy ◽  
Physicochemical Properties ◽  
Noble Metal ◽  
Value Added ◽  
Spectroscopic Techniques ◽  
Efficient Catalyst ◽  
Metal Free ◽  
Value Added Products

AbstractIt is a great challenge to convert thermochemically stable CO2 into value-added products such as CH4, CH3OH, CO via utilizing solar energy. It is also a difficult task to develop an efficient catalyst for the reduction of CO2. We have designed and synthesized noble metal-free photocatalytic nanostructure Ni2P/CdS and Pt/TiO2 for conversion of CO2 to methanol in the presence of sacrificial donor triethylamine (TEA) and hydrogen peroxide. The synthesised catalysts physicochemical properties were studied by using several spectroscopic techniques like; XRD, UV-DRS, XPS, TEM, SEM and PL. Quantification of methanol by GC–MS showed encouraging results of 1424.8 and 2843 μmol g−1 of catalyst for Pt/TiO2 and 5 wt% Ni2P/CdS composites, respectively. Thus, Ni2P/CdS is a promising catalyst with higher productivity and significant selectivity than in-vogue catalysts.

Hydrogen bond donor functionalized poly(ionic liquid)s for efficient synergistic conversion of CO2 to cyclic carbonates

2020 ◽  
Author(s):  
Haibin Gou ◽  
Xifei Ma ◽  
Qian Su ◽  
Lei Liu ◽  
Ting Ying ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Ionic Liquid ◽  
Value Added ◽  
Pivotal Role ◽  
Cyclic Carbonates ◽  
Hydrogen Bond Donor ◽  
Metal Free ◽  
Recyclable Catalysts ◽  
Poly Ionic Liquid ◽  
Value Added Products

The development of metal-free, high effective and recyclable catalysts plays a pivotal role in transforming CO2 into high value-added products such as cyclic carbonates. In this paper, we have introduced...

Noble-metal-free NiFeMo nanocatalyst for hydrogen generation from the decomposition of hydrous hydrazine

2015 ◽  
Vol 3 (1) ◽  
pp. 121-124 ◽  
Author(s):  
Hong-Li Wang ◽  
Jun-Min Yan ◽  
Si-Jia Li ◽  
Xue-Wei Zhang ◽  
Qing Jiang
Keyword(s):  
Noble Metal ◽  
Hydrogen Generation ◽  
Efficient Catalyst ◽  
Metal Free ◽  
Complete Decomposition

Noble-metal-free NiFeMo has been applied as an efficient catalyst for the rapid and complete decomposition of hydrous hydrazine for hydrogen generation.

Nitrogen-doped metal-free carbon catalysts for (electro)chemical CO2 conversion and valorisation

2019 ◽  
Vol 48 (36) ◽  
pp. 13508-13528 ◽  
Author(s):  
Diana M. Fernandes ◽  
Andreia F. Peixoto ◽  
Cristina Freire
Keyword(s):  
Electrochemical Reduction ◽  
Carbon Materials ◽  
Value Added ◽  
Co2 Conversion ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Recent Developments ◽  
Carbon Catalysts ◽  
Made In ◽  
Value Added Products

This review focuses on the recent developments made in the fabrication of N-doped carbon materials for enhanced CO2 conversion and electrochemical reduction into high-value-added products.

scholarly journals Ammonia borane enabled upgrading of biomass derivatives at room temperature

2020 ◽  
Vol 22 (18) ◽  
pp. 5972-5977
Author(s):  
Wenfeng Zhao ◽  
Sebastian Meier ◽  
Song Yang ◽  
Anders Riisager
Keyword(s):  
Room Temperature ◽  
Value Added ◽  
Ammonia Borane ◽  
Efficient Catalyst ◽  
Free System ◽  
Mild Conditions ◽  
Catalyst Free ◽  
Value Added Products

An efficient catalyst-free system composed of ammonia borane in water or alcohol was developed to selectively convert biomass-derived feedstock into four value-added products under extremely mild conditions.

scholarly journals Biorefinery of lignocellulosic biopolymers

2016 ◽  
Vol 2 (1) ◽  
pp. 79 ◽  
Author(s):  
Bruna Steil Boneberg ◽  
Grazielle Dias Machado ◽  
Davi Friedrich Santos ◽  
Fernando Gomes ◽  
Douglas José Faria ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Lignocellulosic Biomass ◽  
Value Added ◽  
Renewable Sources ◽  
Renewable Source ◽  
Different Types ◽  
Historic Background ◽  
Made In ◽  
Value Added Products

Lignocellulosic biomass has been widely investigated as a natural renewable source of feedstocks to produce high value added products which can replace energy and materials obtained from non-renewable sources. Polymers are products largely employed in industry in many different applications, which nowadays are mostly produced from petrochemical derivatives, generating huge amounts of waste of difficult treatment prior to disposal. In order to replace these polymers derived from petroleum, efforts have been made in the development of biopolymers, in the biorefinery context, derived from biomass possessing physicochemical properties similar to those derived from petroleum so that they can successfully replace these materials. A review on the different types of biopolymers obtained from biomass, as polysaccharides, lipids, proteins, polyesters produced by plants and microorganisms, and other assorted biopolymers is accomplished. An evaluation of physicochemical properties and applications of different types of biopolymers is approached. It is also discussed about the degradability of biopolymers differentiating oxo-degradability and biodegradability. A brief historic background about biopolymers is also exposed.

scholarly journals Visible-Light-Promoted Metal-Free Ammoxidation of C(sp3)-H bonds

2020 ◽  
Author(s):  
Kathiravan Murugesan ◽  
Karsten Donabauer ◽  
Burkhard Koenig
Keyword(s):  
Organic Synthesis ◽  
Value Added ◽  
Kinetic Studies ◽  
Organic Dye ◽  
Complex Structures ◽  
Time Resolved ◽  
Metal Free ◽  
Drug Molecules ◽  
Aryl Nitriles ◽  
Value Added Products

The metal-free activation of C(<i>sp</i><sup>3</sup>)-H bonds to value-added products is of paramount importance in organic synthesis. Herein, we report the use of the commercially available organic dye 2,4,6-triphenylpyrylium tetrafluoroborate (TPP) for the conversion of methylarenes to the corresponding aryl nitriles via a photo process. Applying this methodology, a variety of cyanobenzenes have been synthesized in good to excellent yield under metal- and cyanide-free conditions. We demonstrate the scope of the method with over 50 examples including late-stage functionalization of drug molecules (celecoxib) and complex structures such as L-menthol, amino acids and cholesterol derivatives. Further, the presented synthetic protocol is applicable for gram-scale reactions. In addition to methylarenes, selected examples for the cyanation of aldehydes, alcohols and oximes are demonstrated as well. Detailed mechanistic investigations have been carried out using time-resolved luminescence quenching studies, control experiments and NMR‑ spectroscopic as well as kinetic studies, all supporting the proposed catalytic cycle.

scholarly journals Copper oxide as efficient catalyst for oxidative dehydrogenation of alcohols with air

2015 ◽  
Vol 5 (4) ◽  
pp. 2467-2477 ◽  
Author(s):  
Raju Poreddy ◽  
Christian Engelbrekt ◽  
Anders Riisager
Keyword(s):  
Copper Oxide ◽  
Oxidative Dehydrogenation ◽  
Carbonyl Compound ◽  
Noble Metal ◽  
Cuo Nanoparticles ◽  
Efficient Catalyst ◽  
Metal Free ◽  
Compound Synthesis

Well-defined CuO nanoparticles are presented as catalysts in a new noble metal-free and green reaction protocol for carbonyl compound synthesis.

Noble‐Metal‐Free Ni‐MoO x Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane

Small Methods ◽  
2018 ◽  
Vol 2 (12) ◽  
pp. 1800250 ◽  
Author(s):  
Si‐Jia Li ◽  
Xia Kang ◽  
Ba‐Ri Wulan ◽  
Xian‐Lin Qu ◽  
Kun Zheng ◽  
...  
Keyword(s):  
Noble Metal ◽  
Efficient Catalyst ◽  
Metal Free ◽  
Complete Decomposition ◽  
Highly Efficient
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