Related Experiment Video
Updated: Jun 9, 2026
09:22
Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
Published on: July 25, 2025
Advances in selective conversions by heterogeneous photocatalysis
Giovanni Palmisano1, Elisa García-López, Giuseppe Marcì
1Schiavello-Grillone Photocatalysis Group, Dipartimento di Ingegneria Chimica dei Processi e dei Materiali, Università degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy.
Chemical Communications (Cambridge, England)
|September 8, 2010
Summary
Heterogeneous photocatalysis offers a green alternative to hazardous chemical processes. Recent advances show its application in selective oxidation and reduction for synthesizing valuable compounds efficiently.
Area of Science:
- Green chemistry and sustainable synthesis.
- Heterogeneous photocatalysis.
- Selective oxidation and reduction reactions.
Background:
- Traditional chemical processes often rely on hazardous reagents and conditions.
- There is a growing need for environmentally benign and energy-efficient synthetic routes.
- Photocatalysis presents a promising alternative for sustainable chemical transformations.
Purpose of the Study:
- To review recent advances in heterogeneous photocatalysis for selective synthesis.
- To highlight the application of photocatalysis as a green chemistry approach.
- To showcase the synthesis of valuable compounds via selective oxidation and reduction.
Main Methods:
- Literature review of recent research in heterogeneous photocatalysis.
- Focus on selective oxidation and reduction reactions.
- Analysis of energy efficiency and environmental impact.
Main Results:
- Demonstration of heterogeneous photocatalysis as a viable green route.
- Successful synthesis of valuable compounds through selective oxidation and reduction.
- Evidence of energy efficiency and reduced environmental hazards compared to conventional methods.
Conclusions:
- Heterogeneous photocatalysis is a powerful tool for sustainable synthesis.
- Selective photocatalytic conversions offer significant advantages over traditional methods.
- Continued research in this area will drive further adoption of green chemistry principles.
Related Concept Videos
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
01:26Photochemical Electrocyclic Reactions: Stereochemistry
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
01:27Catalysis
Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
02:50Catalysis
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.