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A Facile Synthesis of Nanocrystalline Spherical TiO2 Particles and its Photoluminescent Properties

Weiwei Cai, Hui Yang, Xingzhong Guo, W. Cai, more

Procedia Engineering > 2014 > 94 > Complete > 71-75

Spherical Titanium dioxide (TiO ₂ ) particles were successfully synthesized by sol-gel process in oil-in-water emulsion. Hydrothermal treatment was adopted to induce crystallization of the amorphous gel microspheres. The resulting particles show spherical structure and are suspended without coagulation. Doping and hydrothermal treatment had no obvious effect on the morphology of the TiO ...

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Oxide‐Encapsulated Silver Electrocatalysts for Selective and Stable Syngas Production from Reactive Carbon Capture Solutions

Zhexi Lin, Nathaniel Blake, Xueqi Pang, Zhirui He, more

Angewandte Chemie International Edition > 63 > 33 > n/a - n/a

Electrolysis of bicarbonate‐containing CO₂ capture solutions is a promising approach towards achieving low‐cost carbon‐neutral chemicals production. However, the parasitic bicarbonate‐mediated hydrogen evolution reaction (HER) and electrode instability in the presence of trace impurities remain major obstacles to overcome. This work demonstrates that the combined use of titanium dioxide (TiO₂) overlayers...

article

Oxide‐Encapsulated Silver Electrocatalysts for Selective and Stable Syngas Production from Reactive Carbon Capture Solutions

Zhexi Lin, Nathaniel Blake, Xueqi Pang, Zhirui He, more

Angewandte Chemie > 136 > 33 > n/a - n/a

Electrolysis of bicarbonate‐containing CO₂ capture solutions is a promising approach towards achieving low‐cost carbon‐neutral chemicals production. However, the parasitic bicarbonate‐mediated hydrogen evolution reaction (HER) and electrode instability in the presence of trace impurities remain major obstacles to overcome. This work demonstrates that the combined use of titanium dioxide (TiO₂) overlayers...

article

Highly crystalline yttria‐stabilized zirconia and titania thin films on plastic substrates via sol‐gel transfer process

Hiromitsu Kozuka, Takehito Yamada, Ryota Okuda, Hideyuki Hirakoso

Journal of the American Ceramic Society > 107 > 9 > 5749 - 5761

We prepared yttria‐stabilized zirconia (YSZ) and titania crystalline thin films on polycarbonate (PC) substrates by the sol‐gel transfer technique that we have developed recently. Precursor gel films were deposited by spin‐coating on a polyimide/polyvinylpyrrolidone mixture layer on Si(100) substrates, and then were calcined at 600°C. The spin‐coating and the calcination were cycled, followed by final...

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Sketching Precursor Evolution to Delineate Growth Pathways for Anatase (TiO₂) Crystal Design

Anusha Jain, Manjesh Kumar

Small > 20 > 25 > n/a - n/a

Engineering advanced functional materials such as Anatase crystals through the molecular tuning of crystal facets is the current enigma of interest pertinent to solving the structure‐property‐performance triad. Developing optimal shapes and sizes of crystallite necessitates exploring the nanoscopic growth mechanism via precursor tracking. Here, the tapestry of particles varying in dimensionality (0D–3D),...

article

Exploiting Laser‐Induced Oxidation Phase Diagrams for Multifunctional Titania Thin Films

Drake Austin, Brian Everhart, Farheen Khurshid, Jeyavelan Muthu, more

Advanced Functional Materials > 34 > 13 > n/a - n/a

Local laser‐induced oxidation is an extremely valuable technique to perform high‐throughput optimization across multidimensional parameter sets. In this work, a versatile method is presented for the synthesis of titanium dioxide (TiO₂) thin‐films with varying crystalline structures through the use of localized, visible, continuous‐wave laser‐processing. By controlling the laser intensity and the exposure...

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Surface Analysis Insight Note: Observations relating to photoemission peak shapes, oxidation state, and chemistry of titanium oxide films

Pascal Bargiela, Vincent Fernandez, William Ravisy, David Morgan, more

Surface and Interface Analysis > 56 > 4 > 181 - 188

It is common practice to describe the coordination of metal atoms in a binding configuration with their nearest neighbors in terms of oxidation state, a measure by which the number of electrons redistributed between atoms forming chemical bonds. In XPS terms, change to an oxidation state is commonly inferred by correlating photoemission signal with binding energy. The assumption, when classifying...

article

Stability investigation of the pcm nanocomposites

Janusz T. Cieśliński, Paulina Boroń, Maciej Fabrykiewicz

Acta Mechanica et Automatica > 2023 > Vol. 17, no. 3 > 381--389

Ensuring the stability is a key issue to be solved for the technical application of nanocomposites. In this work, fatty acid P1801 served as base phase change material (PCM)P1801, and its main ingredients are palmitic acid (58%) and stearic acid (38%). Titania (TiO2) and alumina (Al2O3) with mass concentrations of 1% and 5% were selected as nanoparticles, while polyvinylpyrrolidone (PVP) or oleic...

article

Embedding isolated Fe species in titania increases olefins for oxidative propane dehydrogenation

Xuejing Zhang, Jingnan Wang, Yongbin Yao, Qiang Liu, more

AIChE Journal > 69 > 7 > n/a - n/a

Metal oxide‐based catalysts are widely studied in oxidative propane dehydrogenation (OPDH), but they usually suffered from the low olefin activity, which is believed to be related to the active centers of metal‐oxygen species. Herein, we report an effective cation‐exchange strategy towards the development of TiO₂ nanosheets embedded isolated Fe species (Fe₁TiO₂) as a highly‐active and stable catalyst...

article

TiO₂‐graphene dispersed sulfonated polyphenylenesulfide sulfone nanocomposites for medium temperature PEMFCs

Senthil Theerthagiri, Srinivasan Krishnan, Paradesi Deivanayagam, Chandran Muthiah, more

Polymers for Advanced Technologies > 34 > 7 > 2261 - 2271

Sulfonated polyphenylene sulphide sulfone (sPPSS) loaded with titania‐graphene (TiO₂‐GNS) was synthesized by the polycondensation method and studied their suitability towards proton exchange membrane fuel cell applications. The structural, morphological, and physic‐chemical properties of sPPSS nanocomposites containing varying amounts of (1%, 2%, 3%, and 5%) TiO₂‐GNS was investigated by Fourier transform...

article

Effect of organically modified titania and zirconia nanoparticles on characteristics, properties of coating based on acrylic emulsion polymer for outdoor applications

Phi Hung Dao, Lan Thi Phung, Anh Hiep Nguyen, Van Phuc Mac, more

Journal of Applied Polymer Science > 140 > 16 > n/a - n/a

Effect of titania nanoparticles modified with 3 wt% [3‐(methacrylloxy)propyl]trimethoxysilane (m‐TiO₂ NPs) and zirconia nanoparticles modified with 3 wt% (3‐glycidyloxypropyl)triethoxysilane (m‐ZrO₂ NPs) on properties and morphology of acrylic emulsion polymer coating was investigated. With suitable weight ratio of m‐TiO₂/m‐ZrO₂ NPs, the acrylic coating could be improved abrasion resistance, weather...

article

Development of a Raman spectroscopy system for in situ monitoring of microwave‐assisted inorganic transformations

John Jamboretz, Andreas Reitz, Christina S. Birkel

Journal of Raman Spectroscopy > 54 > 3 > 296 - 304

Microwave heating methods offer unique advantages in preparations of inorganic solids due to the high heating rates, potentially selective heating, and time/energy reductions. Understanding of these enhancements as well as involved mechanisms is poor due to the lack of available and easily applicable in situ monitoring methods, particularly for samples in the solid state. Existing in situ studies...

article

Differentiating between Acidic and Basic Surface Hydroxyls on Metal Oxides by Fluoride Substitution: A Case Study on Blue TiO₂ from Laser Defect Engineering

Kinran Lau, Felix Niemann, Kaltum Abdiaziz, Markus Heidelmann, more

Angewandte Chemie International Edition > 62 > 12 > n/a - n/a

Both oxygen vacancies and surface hydroxyls play a crucial role in catalysis. Yet, their relationship is not often explored. Herein, we prepare two series of TiO₂ (rutile and P25) with increasing oxygen deficiency and Ti³⁺ concentration by pulsed laser defect engineering in liquid (PUDEL), and selectively quantify the acidic and basic surface OH by fluoride substitution. As indicated by EPR spectroscopy,...

article

Fast Li‐ion Storage and Dynamics in TiO₂ Nanoparticle Clusters Probed by Smart Scanning Electrochemical Cell Microscopy

Emmanuel Batsa Tetteh, Dimitrios Valavanis, Enrico Daviddi, Xiangdong Xu, more

Angewandte Chemie International Edition > 62 > 9 > n/a - n/a

Anatase TiO₂ is a promising material for Li‐ion (Li⁺) batteries with fast charging capability. However, Li⁺ (de)intercalation dynamics in TiO₂ remain elusive and reported diffusivities span many orders of magnitude. Here, we develop a smart protocol for scanning electrochemical cell microscopy (SECCM) with in situ optical microscopy (OM) to enable the high‐throughput charge/discharge analysis of single...

article

Description of Photodegradation Mechanisms and Structural Characteristics in Carbon@Titania Yolk–Shell Nanostructures by XAS (Small 2/2023)

Chih‐Hao Hsu, Wei‐Hsiang Huang, Chin‐Jung Lin, Chun‐Hao Huang, more

Small > 19 > 2 > n/a - n/a

Carbon@Titania Yolk–Shell Nanostructures In article number 2203881, Shih‐Yun Chen, Chi‐Liang Chen, and co‐workers use carbon@titania yolk‐shell nanostructures for acetaminophen photocatalytic degradation in water. X‐ray absorption spectroscopy discovers critical charge transfer processes and holes that formed in the p‐d hybridized bands significantly enhance photodegradation ability under solar irradiation...

article

Description of Photodegradation Mechanisms and Structural Characteristics in Carbon@Titania Yolk–Shell Nanostructures by XAS

Chih‐Hao Hsu, Wei‐Hsiang Huang, Chin‐Jung Lin, Chun‐Hao Huang, more

Small > 19 > 2 > n/a - n/a

Carbon@titania yolk–shell nanostructures are successfully synthesized at different calcination conditions. These unique structure nanomaterials can be used as a photocatalyst to degrade the emerging water pollutant, acetaminophen (paracetamol). The photodegradation analysis studies have shown that the samples with residual carbon nanospheres have improved the photocatalytic efficiency. The local electronic...

article

Polymer Nanocomposites Based on TiO₂ as a Reinforcing Agent: An Overview

Hifza Nawaz, Muhummad Umar, Reeha Maryam, Iqra Nawaz, more

Advanced Engineering Materials > 24 > 11 > n/a - n/a

Titania (TiO₂) is one of the most versatile materials in the field of polymer science and technology. In recent years, a large area of research has focused on the combination of TiO₂ with polymers and other carbon nanostructures. Literature reports suggest that nanoscale TiO₂ reinforcement gives rise to new optical, electrical, and physiochemical properties attained at extremely low TiO₂ content,...

article

A Dual‐Functional Titanium Nitride Chloride Layered Matrix with Facile Lithium‐Ion Diffusion Path and Decoupled Electron Transport as High‐Capacity Anodes

Siwei Zhao, Chenlong Dong, Xiaotong Wang, Yufeng Tang, more

Advanced Functional Materials > 32 > 25 > n/a - n/a

Intercalation typed electrodes are expected with low theoretical capacity, which falls behind their high rate performance and stability. In this work, α‐TiNCl, an isoelectronic system of TiO₂, is designed as a promising high‐capacity intercalation anode. TiNCl features are layered TiN backbone terminated by Cl atoms. While the rocksalt TiN backbones function as electron conductors, the interlayer...

article

Preparation, characterization and photocatalytic performance of K₈[Fe(H₂O)W₁₁MnO₃₉]/PANI/TiO₂ ternary composite

Ying Li, Qiu‐jie Shan, Lin Chen, Wei Chen, more

Zeitschrift für anorganische und allgemeine Chemie > 647 > 23-24 > 2226 - 2234

A new ternary composite catalyst, K₈[Fe(H₂O)W₁₁MnO₃₉]/PANI/TiO₂, was synthesized by electrostatic self‐assembly method, of which K₈[Fe(H₂O)W₁₁MnO₃₉] was prepared by direct synthesis method, and PANI/TiO₂ was prepared by coating polyaniline on the surface of TiO₂ particles using chemical oxidation method with (NH₄)₂S₂O₈ as oxidant. Then, this ternary composite material was characterized by infrared...

article

Active Sites in Heterogeneous Photocatalysis: Brief Notes on the Identification of their Analogies with the Standard Heterogeneous Catalysis Concept

Pavel Krystynik, Petr Kluson, Michal Vesely, Petr Dzik, more

Chemical Engineering & Technology > 44 > 11 > 2164 - 2170

The reaction rate concepts in heterogeneous catalysis are based on well‐defined and usually well‐quantified active sites. Such an active site is stable over time and its main features are typically constant. In heterogeneous photocatalysis, the active site is of different nature. Its existence depends on the instantaneous availability of photons and the variable ability of the photocatalyst to use...

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Search results

A Facile Synthesis of Nanocrystalline Spherical TiO2 Particles and its Photoluminescent Properties

Oxide‐Encapsulated Silver Electrocatalysts for Selective and Stable Syngas Production from Reactive Carbon Capture Solutions

Oxide‐Encapsulated Silver Electrocatalysts for Selective and Stable Syngas Production from Reactive Carbon Capture Solutions

Highly crystalline yttria‐stabilized zirconia and titania thin films on plastic substrates via sol‐gel transfer process

Sketching Precursor Evolution to Delineate Growth Pathways for Anatase (TiO₂) Crystal Design

Exploiting Laser‐Induced Oxidation Phase Diagrams for Multifunctional Titania Thin Films

Surface Analysis Insight Note: Observations relating to photoemission peak shapes, oxidation state, and chemistry of titanium oxide films

Stability investigation of the pcm nanocomposites

Embedding isolated Fe species in titania increases olefins for oxidative propane dehydrogenation

TiO₂‐graphene dispersed sulfonated polyphenylenesulfide sulfone nanocomposites for medium temperature PEMFCs

Effect of organically modified titania and zirconia nanoparticles on characteristics, properties of coating based on acrylic emulsion polymer for outdoor applications

Development of a Raman spectroscopy system for in situ monitoring of microwave‐assisted inorganic transformations

Differentiating between Acidic and Basic Surface Hydroxyls on Metal Oxides by Fluoride Substitution: A Case Study on Blue TiO₂ from Laser Defect Engineering

Fast Li‐ion Storage and Dynamics in TiO₂ Nanoparticle Clusters Probed by Smart Scanning Electrochemical Cell Microscopy

Description of Photodegradation Mechanisms and Structural Characteristics in Carbon@Titania Yolk–Shell Nanostructures by XAS (Small 2/2023)

Description of Photodegradation Mechanisms and Structural Characteristics in Carbon@Titania Yolk–Shell Nanostructures by XAS

Polymer Nanocomposites Based on TiO₂ as a Reinforcing Agent: An Overview

A Dual‐Functional Titanium Nitride Chloride Layered Matrix with Facile Lithium‐Ion Diffusion Path and Decoupled Electron Transport as High‐Capacity Anodes

Preparation, characterization and photocatalytic performance of K₈[Fe(H₂O)W₁₁MnO₃₉]/PANI/TiO₂ ternary composite

Active Sites in Heterogeneous Photocatalysis: Brief Notes on the Identification of their Analogies with the Standard Heterogeneous Catalysis Concept

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