Articles tagged with Photocatalysis
A team of Japanese researchers has successfully developed a recycling photoreactor that enables the synthesis of optically pure compounds with high yields, achieving an optical purity of 98-99%. The system uses a two-step rapid photoracemization process and can produce enantiomerically pure chiral sulfoxides in yields higher than 80%.
Researchers at Ritsumeikan University demonstrate quasi-reversible displacement of organic ligands on nanocrystal surfaces under visible light irradiation. This finding opens up new avenues for enhancing the tunability and functionality of inorganic materials with aromatic molecules.
Researchers have developed a novel tin-based MOF that can selectively reduce CO2 to formate in the presence of visible light, achieving high selectivity and quantum yield. The material, called KGF-10, was found to be efficient, precious-metal-free, and single-component.
Researchers developed a novel method for photocatalytic water splitting by regulating the built-in electric field of nitrogen-deficient polymeric carbon nitride (PCN) on polyhedral SrTiO3. This synergistic approach improves charge transfer and light absorption, leading to enhanced overall water splitting efficiency.
A new strategy has been developed to enhance photocatalytic water oxidation by introducing a charge-transfer mediator. The mediator, partially oxidized graphene, reduces charge recombination and prolongs the lifetime of photogenerated charges.
A new type of floatable photocatalytic platform composed of hydrogel nanocomposites efficiently proceeds hydrogen evolution reaction. The platform exhibits clear advantages over conventional systems, including efficient solar energy conversion and easy gas diffusion.
Scientists at the National University of Singapore have developed a new method for synthesizing organosilanes using eosin Y, a low-cost and readily available dye molecule. This enables stepwise customised functionalisation of multihydrosilanes to access fully substituted silicon compounds.
By doping liquid crystals with azobenzene molecules, researchers can induce reversible changes in thermal conductivity under ultraviolet light. This breakthrough opens up new possibilities for designing materials with tunable thermal conductivity to address challenges in microelectronics.
Recent advances in catalytic methane oxidation via thermocatalysis and photocatalysis demonstrate promising results for environmental remediation. The development of efficient catalysts, improved reactor designs, and fundamental studies on surface chemistry are key findings.
Researchers at Tokyo Institute of Technology developed a novel visible light-driven single transition metal catalyst that combines high light harvesting abilities and broad applicability. The SFI-Rh(I) complexes overcome previous limitations, enabling versatile photocatalytic reactions with increased stability.
Researchers have developed a practical method to generate green hydrogen using natural enzymes, which contain only earth-abundant elements. The new approach enables the efficient production of green hydrogen from sunlight, making it a promising solution for decarbonizing transportation and industries.
Researchers have developed a new simulation method to study polarons in 2D materials, which could lead to breakthroughs in OLED TVs and hydrogen fuel production. The study uses quantum mechanical theory and computation to determine the fundamental properties of polarons in 2D materials.
Researchers synthesized a new orthorhombic Sn3O4 polymorph with a narrower bandgap, indicating higher efficiency for visible light absorption. The discovery is significant for photocatalytic reactions such as water splitting and CO2 reduction.
Researchers have successfully developed chemically stable, tunable-bandgap 2D nanosheets from perovskite oxynitrides, opening new possibilities for sustainable technologies such as photocatalysis, electrocatalysts, and electronics. The nanosheets exhibit superior proton conductivity and excellent photocatalytic activity.
Researchers at Oregon State University have developed a dual-purpose catalyst that can both purify herbicide-tainted water and produce hydrogen. The catalyst, derived from metal-organic frameworks, shows promise in tackling global water pollution and provides a sustainable alternative to conventional hydrogen production methods.
Researchers propose a 'C-C bond-first' strategy to convert biomass into liquid hydrogen carriers, releasing H2 on site. The approach prioritizes C-C bond breaking for high photocatalytic hydrogen production and storage.
Researchers have developed a novel technique to produce hydrogen peroxide without releasing carbon dioxide, reducing greenhouse gas emissions. The method uses photocatalysis and carbon nitride as a catalyst, making it more cost-effective and environmentally friendly.
Researchers at City University of Hong Kong have developed a lead-free perovskite photocatalyst for highly efficient solar energy-to-hydrogen conversion. The study uncovers the interfacial dynamics between halide perovskite molecules and electrolytes, enabling better photoelectrochemical hydrogen generation.
Researchers at Rice University have developed a photochemical process that simplifies the manufacture of essential precursors for drugs and agricultural chemicals. By illuminating reagents with visible light, they can form diazides in conditions far gentler than current industrial processes.
Researchers from City University of Hong Kong and Australia developed a new method to enhance charge mobility in metal oxide catalysts, leading to improved water splitting efficiency. The method involves phosphorus doping, which reduces energy losses and increases charge separation efficiency.
Researchers at HKU-CAS Joint Laboratory have developed a protonation process to enhance the efficiency of photocatalysts in generating hydrogen using visible solar light. The discovery could lead to more efficient and stable solar energy utilization, paving the way for 'net-zero' green hydrogen production.
Researchers have developed a metal-free photon upconversion system that transforms readily available visible light into UVB photons, enabling sustainable photochemical processes. The breakthrough enables efficient generation of high-energy UV photons without relying on mercury lamps or other inefficient alternatives.
Researchers have discovered that nanodiamonds can emit solvated electrons in water when exposed to visible light, a crucial step towards using them as photocatalysts. This discovery could lead to the development of inexpensive and metal-free processes for converting CO2 into valuable hydrocarbons or converting N2 into ammonia.
The new catalyst uses energy from light to convert ammonia into clean-burning hydrogen fuel, breaking the need for heat and potentially reducing greenhouse gas emissions. The discovery paves the way for sustainable, low-cost hydrogen production locally rather than in massive centralized plants.
Scientists have recorded photocatalysis charge separation processes experimentally on Cu2O particles, revealing rapid electron transfer and slower hole trapping, enabling better understanding of photocatalytic water splitting limitations. The technique allows for spatiotemporal imaging of charge transfer in photocatalyst particles.
Rice University engineers have developed a method to convert hydrogen sulfide into high-demand hydrogen gas and sulfur in a single step using gold nanoparticles. The process gets all its energy from light, offering a cost-effective alternative to traditional remediation methods.
Scientists have revealed the complex mechanisms behind charge transfer in photocatalyst particles, providing insights into designing more efficient photocatalysts. The research used multiple techniques to map the spatiotemporal evolution of charge transfers, showing that built-in electric fields and defects can aid in charge separation.
Researchers introduced a new method to analyze dynamic processes in photoelectrocatalytic reactions using carbon dots. The technique, TPV technology, provides detailed information on charge transfer and reaction kinetics, enabling the discovery of new catalytic properties.
A new titanium-based photocatalyst overcomes production inefficiencies in polyethylene furandicarboxylate (PEF), a biobased plastic replacement for PET. The catalyst increases efficiency by shifting light absorption to the visible range, reducing unwanted byproducts and requiring less UV light.
Scientists have found a novel structure in bismuth oxychloride, featuring a sextuple Bi-O layer composed of rock-salt and fluorite units, which enhances photocatalytic activity. This discovery could lead to improved hydrogen production material designs.
Researchers at Tokyo Institute of Technology have developed a novel, inexpensive catalyst that efficiently reduces carbon dioxide to formate under visible light. The new photocatalyst, KGF-9, boasts high performance and simplicity, with potential applications in reducing greenhouse gas emissions.
Researchers from Tokyo Institute of Technology have developed a surface-modified dye-sensitized nanosheet catalyst that can suppress undesirable back electron transfer and improve water splitting activity. This results in an efficient Z-scheme overall water splitting system with improved hydrogen production.
Chemists at the University of Münster developed a novel method for synthesizing complex organic molecules using visible light. The method produces biologically valuable β-amino acids, including a bifunctional oxime oxalate ester with both amine and ester functionalities.
Researchers have developed a method to convert methane into methanol under ambient conditions, reducing carbon dioxide emissions and paving the way for alternative fuels. The process uses photocatalysts and has potential to mitigate climate change by utilizing methane reserves.
Researchers created a composite of boron nitride and titanium dioxide that harnesses UV-A energy to break apart PFOA molecules in water, degrading 99% of the pollutant in less than three hours. The catalyst is more efficient than existing methods, offering new hope for removing PFOA from drinking water.
A new nanosheet-laminated photocatalytic membrane has been successfully developed by Kobe University researchers, demonstrating excellent water permeance and photocatalytic activity. The membrane's photocatalytic properties make it easier to clean, reducing fouling and increasing its potential for tackling global environmental issues.
A KAUST-led team developed organic semiconductor-based photocatalysts to store solar energy as clean hydrogen fuel. These catalysts can absorb visible light and generate long-lived charges, improving efficiency for hydrogen evolution.
Researchers developed yolk-shell nanocrystals containing metallic gold yolk with semiconductor shells, exhibiting high photocatalytic activity. The structures were synthesized using a sequential ion-exchange process and evaluated using XPS and PL spectroscopy, revealing electronic interactions favorable for photocatalysis.
Researchers anchored Mo2C nanoparticles onto MAPbI3 to enhance photocatalytic activity for hydrogen evolution. The composite exhibits superior performance, surpassing pristine MAPbI3 and Pt-deposited MAPbI3.
A research team developed a photocatalyst that boosts the transformation of methane into ethane and hydrogen with high selectivity. The newly constructed photocatalyst enabled durable photocatalytic nonoxidative coupling under mild conditions.
A team of chemists led by Frank Glorius has successfully synthesized new and medically significant small molecular rings using visible light. The innovative approach enables efficient and mild synthesis under mild reaction conditions, offering opportunities for producing active agents.
Researchers at North Carolina State University have developed a new technique for extracting hydrogen gas from liquid carriers, making it faster, less expensive and more energy efficient. The new method uses sunlight and a reusable photocatalyst to release hydrogen molecules, reducing the need for rhodium and lowering production costs.
A team of researchers developed a simple yet powerful strategy for creating new enzymes with novel reactivity that can produce valuable chemical compounds. They used photobiocatalysis to repurpose naturally occurring enzymes and achieved an enantioselective biocatalytic reaction.
A breakthrough in green technology has successfully produced both hydrogen gas and hydrogen peroxide simultaneously from sunlight and water using a hematite photocatalyst. This innovation could lead to a solar water-splitting utilization system with greater added value, enabling the widespread adoption of carbon-neutral energy sources.
Researchers have developed a new ligand that promotes a direct nickel-photocatalyzed cross-coupling reaction. This novel tridentate pyridinophane ligand enables the discovery of key reaction steps and intermediate species in the catalytic cycle.
The review discusses optimization strategies for multifunctional graphene-based composite photocatalysts, including decreasing defect density, chemical doping, and depositing cocatalysts. Graphene plays a crucial role in enhancing light absorption, electron transfer dynamics, and surface reactions.
Researchers developed a solid-state photocatalyst using TiO2 and CuO nanoclusters to inactivate various variants of SARS-CoV-2. The material is effective under both darkness and indoor light, making it suitable for reducing COVID-19 infection risk in indoor environments.
Researchers from the University of Münster have successfully performed an unconventional cycloaddition, reacting a carbon-carbon double bond with a strained single bond. This method has significant synthetic benefits, allowing for the creation of polycyclic, three-dimensional carbon scaffolds.
Researchers have developed a sustainable methodology to utilize biomass waste for efficient remediation of antibiotic pollution. Fe-contaminated biomass waste ferns are used to synthesize highly active single atom catalysts, demonstrating an appealing strategy for pollutant control and other applications.
The study investigates the role of Pd-Cu alloy in enhancing photocatalytic H2 evolution in TiO2. The results show that introducing Cu into Pd improves hydrogen desorption by reducing adsorption energy, leading to increased photocatalytic activity.
Recent research has extensively reviewed heterogeneous photocatalysis, a technology that utilizes solar energy to efficiently remove various pollutants. The application of semiconductor modification strategies is crucial for overcoming challenges such as high cost and low solar energy utilization rate.
Researchers from Dalian Institute of Chemical Physics developed a highly efficient Z-scheme OWS system, achieving benchmarked apparent quantum efficiency and solar-to-hydrogen energy conversion efficiency over particulate inorganic semiconductor photocatalysts driven by visible light. The system utilizes Ir as reduction cocatalyst and ...
A research team has developed a new strategy to create molecular compounds without multi-step syntheses, using a system of three catalysts. The catalysts work together to selectively insert an aryl group into unactivated alkenes, offering a sustainable and efficient solution for organic synthesis.
A team of MIT researchers has created a biohybrid photocatalyst that can mimic photosynthesis, improving the yield of chemical reactions for generating pharmaceuticals. The new catalyst uses a light-harvesting protein to capture energy from red light and transfer it to a metal-containing catalyst.
A research team discovered a quantum confinement effect in a 3D-ordered macroporous structure of BiVO4, enabling hydrogen production under visible light. The study found that the 3DOM structure had higher photocatalysis efficiency and produced more oxygen than its plate-like counterpart.
A team of researchers at Shinshu University has successfully observed proton transfer between the titania surface and a dye molecule during UV light irradiation. The study used time-resolved fluorescence spectroscopy to measure the formation of basic hydroxyl groups on the titania surface, which accepts protons from the dye.
Scientists fabricate 1D and 2D boron sulfide (BS) nanosheets with unique electronic properties that can be controlled by changing the number of layers. The bandgap energy decreases as more layers are added, making BS a potential n-type semiconductor material.
Researchers develop amide-linked covalent organic frameworks as efficient heterogeneous photocatalysts, improving adsorption capacity and recyclability for dyes in water. The frameworks exhibit high crystallinity and stability, ensuring satisfactory recyclability and outstanding photocatalytic activity under visible light.
Researchers successfully split water using a powder photocatalyst and solar rays in a 100m2 outdoor area, producing solar hydrogen. The system's design and separation performance require improvement to achieve low costs and high efficiency.
Researchers have developed Mo-doped Bi5O7Br nanosheets that significantly improve nitrogen reduction to ammonia under ambient conditions. The material's oxygen vacancies and Mo dopant facilitate N2 capture, activation, and fixation, leading to enhanced photoactivity.