Articles tagged with Photocatalysis
Researchers engineered conjugation of donor and acceptor units in covalent organic frameworks to enhance photocatalytic H2O2 production. USTB-46 achieved a high yield of 8274 mmol g−1 h−1, attributed to optimized light absorption, thermodynamic catalytic activity, and compatible D-A units.
A recent study from Dalian Institute of Chemical Physics measures surface charges in liquid environments, revealing an additional driving force that pulls photogenerated electrons to the surface. The researchers also found that local surface potential varies with pH and identified an optimal pH range for efficient charge transfer.
Researchers have developed a novel semiconductor material that significantly improves the efficiency of photocatalytic water splitting by eliminating charge recombination and facilitating efficient charge separation. The Sc-doped TiO2 semiconductor achieves a record-breaking quantum yield of 30.3% and a solar-to-hydrogen efficiency of ...
Researchers have developed nanomats that can absorb light energy to break down harmful pollutants in air and water. These lightweight blankets can be reused multiple times and are environmentally friendly, offering a promising solution for clean drinking water production.
Researchers at HKU have developed a photocatalytic approach to converting methane into ethanol, achieving an impressive apparent quantum efficiency of 9.4% and a methane conversion rate of 2.3%. This innovative method offers a highly desirable approach to decarbonising the chemical and fuel industries.
The newly synthesized monolayer Ti3C2Tx transforms photocatalytic bioaerosol disinfection at the catalyst-cell interface. The material achieves a sterilization efficiency of 3.3 log in just 12.8 seconds, far exceeding traditional TiO2.
Professor Kazunari Domen's research develops novel materials and techniques for efficient solar energy harvesting and scalable hydrogen production. His work enables the successful development of large-scale solar-driven hydrogen production units, paving the way for a clean energy future.
A novel double aryne insertion strategy has simplified the production of complex thioxanthones, a type of organic compound with various industrial and medical applications. The new method enables efficient synthesis of diverse thioxanthone derivatives, including functional molecules and photocatalysts.
Researchers at USTC have developed a novel photocatalyst that can efficiently degrade 'Forever chemicals' at low temperatures. The method involves the use of a super-photoreductant, KQGZ, which can promote complete defluorination and mineralization of Teflon and small molecule PFASs.
Julian West, assistant professor of chemistry at Rice, recognized for harnessing free radical intermediates through inner sphere photocatalysis. His work holds significant implications for organic synthesis and developing next-generation therapeutics and materials.
Rice scientists develop new nanomaterial that kills bacteria in biofluids under visible light, with minimal degradation and low lead leaching. The findings suggest potential applications in water treatment and therapeutics.
A new microwave-assisted synthesis route has improved the performance of a coordination polymer photocatalyst, achieving a record-breaking value for CO2-to-formate conversion with a nearly ten-fold increase in apparent quantum yield. The improvements are attributed to well-crystallized material and surface area increases.
Researchers at Colorado State University have developed a new method to break down PFAS, a group of human-made 'forever' chemicals. The system uses an LED light-based photocatalytic approach that can be used at room temperature, offering a more sustainable and efficient solution than traditional chemical manufacturing processes.
Rice researchers have created a catalyst that leverages plasmonic photocatalysis to break down methane and water vapor into hydrogen and carbon monoxide without external heating. The new catalyst system enables on-demand, emissions-free hydrogen production, which could transform the energy industry.
Researchers from Kyushu University successfully promoted singlet fission by introducing chirality into chromophores, achieving high SF efficiency in aqueous nanoparticles. This breakthrough enables applications in energy science, quantum materials, and photocatalysis.
Researchers have developed a novel photocatalyst by combining g-C3N4 with Bi4O5Br2 and graphene, resulting in efficient degradation of pollutants. The CN/BOB-16 heterostructure exhibited superior performance, surpassing existing benchmarks, and confirmed the key role of Z-type heterojunctions in generating active species.
Researchers at Japan Advanced Institute of Science and Technology have developed a novel method to culture antitumor bacteria using porous scaffolds, enhancing their anticancer properties and improving safety in animal testing. The approach resulted in improved survival rates in mice with breast cancer, including drug-resistant cases.
Researchers at KAIST successfully developed single-atom editing technology that maximizes drug efficacy by converting oxygen atoms into nitrogen atoms in furan compounds. This breakthrough technology enables selective editing of complex natural products or pharmaceuticals, opening new doors for building libraries of drug candidates.
Researchers from Tohoku University developed a novel method to produce hydrogen using ultrafine Rh-Cr mixed-oxide cocatalysts with facet-selective loading. This approach achieved 2.6 times higher water-splitting photocatalytic activity, paving the way for a more abundant, green energy source.
A new Cu-based catalyst is developed to improve the photocatalytic production of C1 chemicals from glucose. The catalyst, featuring nitrogen doping into TiO2, stabilizes atomically dispersed Cu+, enhancing activity and productivities of 1.97mmol g−1 HCOOH and 2.82mmol g−1 H2.
The Rice-led MURI project aims to develop innovative single-atom reactor systems and analyze various chemical processes of strategic importance to the DOD. The researchers, led by Naomi Halas, seek to improve energy efficiency and reduce protocol intensity in chemical reactions.
The Michigan-based system produces ethylene with efficiency, yield, and longevity well above other artificial photosynthesis systems. It achieves a five to six times better performance in converting carbon dioxide into ethylene.
A novel catalyst Au/BiOx-TiO2 enhances oxidative methane coupling by activating C-H bonds and preventing overoxidation, yielding 97% selectivity for C2+ products. The photocatalyst demonstrates stable performance up to 50 hours and outperforms previous catalysts.
Scientists at Johannes Gutenberg Universitaet Mainz create a new approach to prepare highly efficient dyad photocatalysts through electrostatic interactions, outperforming established catalysts. The novel method enables the use of inexpensive additives to improve performance and durability.
Researchers successfully observe and identify the reactive electron species for photocatalytic hydrogen evolution on metal-loaded oxides, shifting the paradigm on the traditionally believed role of metal cocatalysts. The electrons shallowly trapped in the in-gap states contribute to enhancing the hydrogen evolution rate.
Researchers discovered that regulating porphyrin crystal facets can enhance the production of hydrogen peroxide (H2O2) in photocatalysts. The study found that exposing certain crystal surfaces created a strong internal electric field, which increased H2O2 generation rates.
Researchers at Dartmouth College developed a technique using light to imprint 2D and 3D images inside any polymer containing a photosensitive chemical additive. The technology enables the creation of erasable 3D displays with high resolution, applicable in surgeries, architectural designs, education, and art.
Researchers have developed doping strategies to boost photocatalytic activity in water splitting, achieving high quantum yields and efficiencies. By introducing defects and controlling ion release, novel materials are being designed for efficient energy conversion.
Scientists developed a new approach to drive chemical reactions, generating compounds with unique pharmaceutical properties. The method uses photocatalysis and computational models to predict successful reactions, expanding the range of accessible substrates.
Griffith University researchers have developed a novel eco-friendly quantum material that converts methanol into ethylene glycol efficiently under mild conditions. This process utilizes solar-driven photocatalysis, minimizing waste and maximizing renewable energy use.
Researchers developed a novel photocatalyst called N-BAP to reduce esters using sustainable light energy. The catalyst initiates a quadruple electron transfer process, enabling the reduction of esters to form alcohols without using metal reductants.
A novel bifunctional catalyst, Fe-PEI-CN, was synthesized to degrade p-chlorophenol through photocatalysis and Fenton reaction. The catalyst exhibited high photocatalytic activity due to enhanced light absorption and reduced electron-hole recombination.
A team of researchers from Okayama University developed a novel phenothiazine-based organic photoredox catalyst with enhanced stability and recyclability. The new catalyst, PTHS, features a spiral structure that provides improved stability and can be recycled multiple times without losing catalytic activity.
Researchers at Linköping University developed a new method to dope organic semiconductors using air as a dopant, enhancing conductivity and modifying semiconductor properties. The process involves dipping the material in a salt solution and illuminating it with light, resulting in a p-doped conductive plastic.
Researchers at University of Basel have developed a new method to synthesize complex natural substances like terpenes, which can be used as the basis for new medications. The approach allows for controlled molecular structure and targeted changes to improve properties, paving the way for the development of new therapeutic agents.
Researchers developed Au-BiFeO3 nanocrystals with improved photocatalytic activity, achieving 98% methylene blue degradation efficiency. The nanoparticles' unique localized surface plasmon resonance and electron transfer mechanisms enhance their recyclability and stability.
Researchers have developed microscopic crystals that activate in the presence of light, releasing silver ions with antimicrobial activity. These silver-based micromotors move autonomously through photocatalysis, killing bacteria and providing a promising tool for environmental recovery.
Scientists at CiQUS integrate non-native photosensitizers into mammalian cells to induce artificial chemical reactions. This breakthrough showcases the feasibility of leveraging light to fabricate functional molecular products.
A new photocatalyst developed by DGIST's In Su-il research team converts carbon dioxide into useful fuel more efficiently than existing TiO2 catalysts. The technology has the potential to be applied to Carbon Capture and Utilization (CCU) technology, offering a promising solution to reduce global warming.
Researchers developed a high-efficiency catalyst that converts carbon dioxide into ethylene using vitamin C. The catalyst promotes the formation of essential intermediate product carbon monoxide at high current density, overcoming existing electrochemical catalyst limitations.
A team of researchers has successfully transformed CO2 into methanol using sunlight and single atoms of copper deposited on a light-activated material. The new process could create highly selective and tuneable catalysts where the desired product can be dialled up by controlling the catalyst at the nanoscale.
Researchers developed a self-cleaning wall paint using waste-valorized titanium oxide nanoparticles, which can bind and break down pollutants, and then degrade them when exposed to sunlight. The paint combines several advantages, including air pollutant removal, longer durability, and reduced production costs.
Rice University researchers have developed a transformative approach to harnessing the catalytic power of aluminum nanoparticles by annealing them in various gas atmospheres at high temperatures. This allows for modifying the structure of the oxide layer, making the nanoparticles versatile tools for different applications.
Researchers at NUS have developed a microporous covalent organic framework for efficient production of hydrogen peroxide through photosynthesis. The new photocatalyst produces H2O2 spontaneously and efficiently from water and atmospheric air when exposed to visible light.
Researchers developed innovative Au@Cu7S4 yolk@shell nanocrystals capable of producing hydrogen when exposed to both visible and NIR light, achieving a peak quantum yield of 9.4% in the visible range and 7.3% in the NIR range for hydrogen production.
HKU chemists have developed a novel heterogeneous copper photocatalyst that enables the efficient formation of cyclobutane rings, a crucial structural element in pharmaceuticals and biologically active compounds. The new catalyst exhibits high stability and recyclability, making it more economically and environmentally sustainable.
Scientists have created a new molecular system based on manganese that can oxidize various organic substrates and emit NIR-II light after excitation. The complex has two different photoactive states, one of which is extremely oxidizing and exists only briefly, while the other is moderately oxidizing and longer-lived.
Researchers developed bipyridine-based covalent triazine framework (CTF-Bpy) with single cobalt sites for enhanced photocatalytic oxygen evolution. The new catalyst showed remarkable improvements in oxygen evolution rate, exceeding most reported values.
Researchers have developed a precise and efficient tool using 'single atom skeletal editing' to insert single carbon atoms into cyclic compounds, enabling ring size adjustment from five to six-membered rings. This approach opens up the way for designing and modifying complex molecular structures with potential industrial applications i...
Researchers summarize strategies to enhance MOF-based photocatalysis, including metal doping, ligand functionalization, and defect engineering. These methods aim to improve light absorption, charge separation, and catalytic activity.
Researchers propose a new method using titanium dioxide as a photocatalyst for synthesizing thiochromenopyrroledione derivatives in blue light. The approach yielded 20 sulfur-containing heterocyclic compounds with moderate-to-high yield.
A team of experts has developed a way to convert polyethylene waste into ethylene and propionic acid through atomically dispersed metal catalysts. This method uses renewable solar energy to produce valuable chemicals with high selectivity, alleviating the need for complex separation processes.
Researchers have developed a novel photocatalyst system that enables the production of syngas from methane steam reforming under atmospheric pressure. The system harnesses sunlight to split methane and water into hydrogen and carbon monoxide, forming syngas.
Researchers developed new supramolecular and polymeric organic photocatalytic systems to enhance light utilization efficiency and mineralization under solar light. The new system combines in situ H2O2 generation with in situ Fenton reaction, achieving high-flux mineralization under visible light without additional oxidants.
Researchers have created a reliable and efficient method to add fluorine to molecules, increasing pharmaceutical drug efficiency. The iron and sulfur-based reaction enables the release of fluorine from carboxylic acids and its incorporation into alkenes, common building blocks for drugs.
The study reveals sizeable variations and instabilities in electron energies for freshly cleaved MoS2 surfaces, but also shows that atomic hydrogen treatment can effectively neutralize these effects. The findings have potential applications in electronics, photonics, sensors, and catalysis.
Researchers have developed a dinuclear ruthenium complex that efficiently reduces CO2 to carbon monoxide with over 99% selectivity. The catalyst's self-photosensitizing properties enhance its stability under reaction conditions, allowing it to drive the CO2 reduction process even at low CO2 concentrations.
Researchers at Drexel University developed a titanium oxide material that can break down two common dye pollutants in water under visible light. The material reduced rhodamine 6G and crystal violet concentrations by 90% and 64%, respectively, in just 30 minutes.
Researchers have developed a hybrid silicon photocatalyst that efficiently produces hydrogen and high-value compounds using solar power. The non-toxic catalyst achieves an impressive rate of 14.2 mmol gcat−1 h−1, significantly higher than conventional silicon photocatalysts.
Researchers create process to recycle polypropylene, polyethylene and polystyrene plastics into chemical ingredients useful for energy storage. The new method uses LEDs and a catalyst, reducing greenhouse emissions compared to traditional recycling processes.