Tim Peppel
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View article: g‐C <sub>3</sub> N <sub>4</sub> Nanosheet/ZnO Nanosponge Heterojunctions for Efficient Visible‐Light Photocatalytic Degradation of Methylene Blue
g‐C <sub>3</sub> N <sub>4</sub> Nanosheet/ZnO Nanosponge Heterojunctions for Efficient Visible‐Light Photocatalytic Degradation of Methylene Blue Open
This study explores the photocatalytic performance of ZnO nanosponge (ZnO NSp), g‐C 3 N 4 nanosheet (g‐C 3 N 4 NSh), and their composite in degrading methylene blue (MB) under UV and visible‐light irradiation. ZnO NSp displayed superior ac…
View article: Atomically Dispersed Palladium Promoted Suzuki–Miyaura Cross Coupling
Atomically Dispersed Palladium Promoted Suzuki–Miyaura Cross Coupling Open
The palladium‐catalyzed Suzuki – Miyaura cross coupling reaction to forge carbon‐carbon bonds fundamentally changes the practice of organic synthesis. Herein an isolated palladium catalyst supported on polymeric carbon nitride (Pd/PCN) for…
View article: 1-(4-Bromophenyl)-3-chloropropan-1-one
1-(4-Bromophenyl)-3-chloropropan-1-one Open
The title compound, C 9 H 8 BrClO, crystallizes in the monoclinic space group P 2 1 / n with four molecules in the unit cell. The molecular structure consists of almost planar molecules with the chlorine atom protruding from this plane.
View article: Polymeric Carbon Nitride‐Photocatalyzed Aerobic Epoxidation of Alkenes: Application to a Sustainable Synthesis of Rose Oxide
Polymeric Carbon Nitride‐Photocatalyzed Aerobic Epoxidation of Alkenes: Application to a Sustainable Synthesis of Rose Oxide Open
A urea‐based pristine polymeric carbon nitride catalyzes the aerobic epoxidation of citronellol under visible light irradiation with low‐power blue LEDs. Formation of 6,7‐epoxycitronellol in this reaction is remarkably selective yet relati…
View article: (<i>E</i>)-1-(4-Bromophenyl)but-2-en-1-one
(<i>E</i>)-1-(4-Bromophenyl)but-2-en-1-one Open
The title compound, C 10 H 9 BrO, consists of a para -substituted bromophenyl core and an unsaturated carbonyl side chain. The angle between the plane through the carbon atoms of the aryl ring and the plane through the carbon atoms of the …
View article: 3-Chloropropiophenone
3-Chloropropiophenone Open
The title compound, 3-chloropropiophenone (or 3-chloro-1-phenylpropan-1-one), C 9 H 9 ClO, consists of an almost planar molecule that is charaterized by very small torsion angles within the alkyl side chain (torsion angles < 6.3°). No hydr…
View article: Applicability of Semiconductor Photocatalysts in Photoredox Reactions: Highlighting the Performance of Polymeric Carbon Nitrides in Radical Three‐Component Couplings
Applicability of Semiconductor Photocatalysts in Photoredox Reactions: Highlighting the Performance of Polymeric Carbon Nitrides in Radical Three‐Component Couplings Open
A set of five polymeric carbon nitrides (pCNs) made from diverse low‐molecular precursors was compared with metal chalcogenide and pnictogenide semiconductors for their effectiveness in visible light‐induced organic radical reactions. The …
View article: Influence of light on ad- and desorption processes on titanium dioxide surfaces towards efficient CO<sub>2</sub> photoreduction
Influence of light on ad- and desorption processes on titanium dioxide surfaces towards efficient CO<sub>2</sub> photoreduction Open
Light irradiation has significant effects on CO 2 adsorption on TiO 2 , with changes in carbonate, bicarbonate and formate formation.
View article: Green Synthesis of Photocatalytically Active ZnO Nanoparticles Using Chia Seed Extract and Mechanistic Elucidation of the Photodegradation of Diclofenac and p-Nitrophenol
Green Synthesis of Photocatalytically Active ZnO Nanoparticles Using Chia Seed Extract and Mechanistic Elucidation of the Photodegradation of Diclofenac and p-Nitrophenol Open
Zinc oxide nanoparticles (ZnO NPs) were synthesized using a simple and eco-friendly precipitation method, employing a capping agent derived from chia seeds (Salvia hispanica). X-ray diffraction (XRD) analysis confirmed the formation of ZnO…
View article: Effect of Bi2MoO6 Morphology on Adsorption and Visible-Light-Driven Degradation of 2,4-Dichlorophenoxyacetic Acid
Effect of Bi2MoO6 Morphology on Adsorption and Visible-Light-Driven Degradation of 2,4-Dichlorophenoxyacetic Acid Open
The development of highly efficient and stable visible-light-driven photocatalysts for the removal of herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) from water is still a challenge. In this work, Bi2MoO6 (BMO) materials with different mo…
View article: Enhancing the Photocatalytic Activity of Halide Perovskite Cesium Bismuth Bromide/Hydrogen Titanate Heterostructures for Benzyl Alcohol Oxidation
Enhancing the Photocatalytic Activity of Halide Perovskite Cesium Bismuth Bromide/Hydrogen Titanate Heterostructures for Benzyl Alcohol Oxidation Open
Halide perovskite Cs3Bi2Br9 (CBB) has excellent potential in photocatalysis due to its promising light-harvesting properties. However, its photocatalytic performance might be limited due to the unfavorable charge carrier migration and wate…
View article: Exfoliated Polymeric Carbon Nitride Nanosheets for Photocatalytic Applications
Exfoliated Polymeric Carbon Nitride Nanosheets for Photocatalytic Applications Open
Exfoliation into a 2D nanosheet structure can lead to enhanced surface activity and unique optical and electronic properties in polymeric carbon nitride (PCN). In this study, four common exfoliation strategies (liquid ultrasonication, ther…
View article: Fundamental Structural and Electronic Understanding of Palladium Catalysts on Nitride and Oxide Supports
Fundamental Structural and Electronic Understanding of Palladium Catalysts on Nitride and Oxide Supports Open
The nature of the support can fundamentally affect the function of a heterogeneous catalyst. For the novel type of isolated metal atom catalysts, sometimes referred to as single‐atom catalysts, systematic correlations are still rare. Here,…
View article: Design of SrTiO<sub>3</sub>-based catalysts for photocatalytic CO<sub>2</sub> reduction
Design of SrTiO<sub>3</sub>-based catalysts for photocatalytic CO<sub>2</sub> reduction Open
Photocatalytic CO 2 reduction was studied over SrTiO 3 -based catalysts in a high-purity gas-phase photoreactor. Depending on the catalyst composition different main products were obtained.
View article: Photocatalytic Degradation of Diclofenac by Nitrogen-Doped Carbon Quantum Dot-Graphitic Carbon Nitride (CNQD)
Photocatalytic Degradation of Diclofenac by Nitrogen-Doped Carbon Quantum Dot-Graphitic Carbon Nitride (CNQD) Open
In this study nitrogen-doped carbon quantum dots/graphitic carbon nitride nanosheet (CNQD) composites with different contents of nitrogen-doped carbon quantum dots (NCQDs; 2, 4, 6, and 8 wt%) were synthesized. The morphological, physicoche…
View article: Role of SrCO3 on Photocatalytic Performance of SrTiO3-SrCO3 Composites
Role of SrCO3 on Photocatalytic Performance of SrTiO3-SrCO3 Composites Open
Perovskites such as SrTiO3 are interesting for photocatalytic applications due to their structure-related and electronic properties. These properties are influenced by the presence of SrCO3 which is often formed simultaneously during the h…
View article: Comparative Studies of Oxygen‐Free Semiconductors in Photocatalytic CO<sub>2</sub> Reduction and Alcohol Degradation
Comparative Studies of Oxygen‐Free Semiconductors in Photocatalytic CO<sub>2</sub> Reduction and Alcohol Degradation Open
Commercially available α ‐SiC, β ‐SiC, GaN, ZnTe and self‐synthesized g‐C 3 N 4 were investigated in a comparative study regarding their photocatalytic capabilities in CO 2 reduction and alcohol degradation. Under reproducible high‐purity …
View article: Thermal and light induced infrared blackening of ZnO revisited: rediscovery of fundamental scientific knowledge
Thermal and light induced infrared blackening of ZnO revisited: rediscovery of fundamental scientific knowledge Open
A comprehensive and reliable view on the influence of UV light and heat on optical properties of ZnO shall be outlined mainly based on research conducted by scientists from Warsaw Pact countries throughout the twentieth century. The proble…
View article: Thermal and Light Induced Infrared Blackening of ZnO Revisited: Overcoming the Language Border and Rediscovery of Fundamental Scientific Knowledge
Thermal and Light Induced Infrared Blackening of ZnO Revisited: Overcoming the Language Border and Rediscovery of Fundamental Scientific Knowledge Open
A comprehensive and reliable view on the influence of UV light and heat on optical properties of ZnO shall be outlined mainly based on research conducted by scientists from Warsaw Pact countries throughout the 20th century. The problems of…
View article: Pivotal Role of Holes in Photocatalytic CO<sub>2</sub> Reduction on TiO<sub>2</sub>
Pivotal Role of Holes in Photocatalytic CO<sub>2</sub> Reduction on TiO<sub>2</sub> Open
Evidence is provided that in a gas‐solid photocatalytic reaction the removal of photogenerated holes from a titania (TiO 2 ) photocatalyst is always detrimental for photocatalytic CO 2 reduction. The coupling of the reaction to a sacrifici…
View article: 1-Butyl-3-methylimidazolium tribromido(triphenylphosphane-κ<i>P</i>)nickelate(II) butan-1-ol hemisolvate
1-Butyl-3-methylimidazolium tribromido(triphenylphosphane-κ<i>P</i>)nickelate(II) butan-1-ol hemisolvate Open
The solvated title salt, (C 8 H 15 N 2 )[NiBr 3 (P(C 6 H 5 ) 3 )]·0.5C 4 H 10 O, was obtained in the form of single crystals directly from the reaction mixture. The molecular structure consists of separated 1-butyl-3-methylimidazolium cati…
View article: (<i>S</i>)-Alanine ethyl ester tetracyanidoborate, (C<sub>5</sub>H<sub>12</sub>NO)[B(CN)<sub>4</sub>]
(<i>S</i>)-Alanine ethyl ester tetracyanidoborate, (C<sub>5</sub>H<sub>12</sub>NO)[B(CN)<sub>4</sub>] Open
The title molecular salt, C 5 H 12 NO + ·C 4 BN 4 − or (C 5 H 12 NO)[B(CN) 4 ], was obtained as single crystals by slow evaporation of a solution of the compound in acetonitrile over several weeks. The asymmetric unit contains two ( S )-al…
View article: New Low-Melting Triply Charged Homoleptic Cr(III)-Based Ionic Liquids in Comparison to Their Singly Charged Heteroleptic Analogues
New Low-Melting Triply Charged Homoleptic Cr(III)-Based Ionic Liquids in Comparison to Their Singly Charged Heteroleptic Analogues Open
A series of new low-melting triply charged homoleptic Cr(III)-based ionic liquids of the general formula (RMIm)3[Cr(NCS)6] (R = methyl, ethyl, n-butyl, benzyl) is reported. Their syntheses and properties are described in comparison to thei…
View article: 1-Benzyl-3-methylimidazolium bromide
1-Benzyl-3-methylimidazolium bromide Open
The title compound, (BenzMIm)Br (BenzMIm=1-benzyl-3-methylimidazolium), C 11 H 13 N 2 + ·Br − , was obtained as single crystals directly from a pure and liquid sample of the compound over several weeks. The molecular structure of (BenzMIm)…