Article
Chemistry, Physical
Tingcha Wei, Juan Xu, Caixia Kan, Le Zhang, Xingzhong Zhu
Summary: The study focuses on the construction of a g-C3N4/TiO2 heterostructure with tailored Au nanoparticles for efficient charge separation in photocatalysis. The enhanced charge separation leads to excellent photocatalytic activity for pollutant degradation and water splitting, with superoxide radicals identified as playing a crucial role in the catalytic process. Insights into the distinct roles of Au in heterostructure for significantly enhanced charge separation are provided, paving the way for the design of high-efficiency heterostructure photocatalysts with noble metal decoration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Mengnan Nie, Chao Zhou, Weiwei Feng, Changhui Xin, Xin Yu, Qian Li
Summary: Self-doped Ti3+-TiO2 and amorphous ZnS layers-coated Ti3+-TiO2 nanostructures were successfully synthesized for organic pollutant degradation under visible-light illumination. The Ti3+-TiO2 clusters exhibited efficient visible-light absorption and photocatalytic performance, while the amorphous ZnS layers greatly enhanced the charge separation between ZnS layers and self-doped Ti3+-TiO2 clusters. The Ti3+-TiO2@ZnS-15% heterojunction showed the highest photocatalytic activity, approximately 9.87 times that of commercial TiO2, and also exhibited enhanced performance in degrading ciprofloxacin and tetracycline under visible-light illumination.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Pawel Mikrut, Dariusz Mitoraj, Radim Beranek, Wojciech Macyk
Summary: The study found that photoanodes based on belt-shaped crystals dominated by {100} facets exhibit superior performance in a photocatalytic fuel cell (PFC) due to faster transfer of photogenerated holes to methanol oxidation sites, avoiding undesired surface trapping and Fermi level pinning effects.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Hao Zhou, Bin Zhang, Zhan Jiang, Haiguang Zhao, Yuanming Zhang
Summary: In this study, carbon dots were used to modify TiO2 to form a direct Z-scheme (DZS) structure, enhancing the photocatalytic activity. The C-dot/TiO2 composite was prepared by ultrasonication at room temperature through the Ti-O-C bond and electrostatic interaction. The composite showed significantly improved absorption and generated more free radicals, leading to approximately 10 times higher photocatalytic activity compared to TiO2. This study provides an efficient approach for preparing C-dot/TiO2 composites with high photocatalytic activity at room temperature.
Article
Environmental Sciences
Karen Yuanting Tang, James Xiaoyuan Chen, Enrico Daniel R. Legaspi, Cally Owh, Ming Lin, Ice Si Yin Tee, Dan Kai, Xian Jun Loh, Zibiao Li, Michelle D. Regulacio, Enyi Ye
Summary: The Au-embedded TiO2 nanofibers showed superior photocatalytic degradation efficiency for organic dye pollutants, attributed to the plasmon resonance absorption of Au nanoparticles and effective charge separation at the Au-TiO2 hybrid heterojunction.
Article
Chemistry, Physical
Linsong Wu, Xiaofang Pei, Mengjun Mei, Zhen Li, Shiwei Lu
Summary: This study prepared Ag-TiO2 photocatalysts with different silver contents and applied them to cement mortar. The results showed that 2% Ag-TiO2 had the highest photocatalytic activity under UV light, while 5% Ag-TiO2 had the highest photocatalytic activity under solar light. Photocatalytic mortar prepared by the spraying method exhibited high photocatalytic performance without affecting the mechanical properties of the mortar.
Article
Environmental Sciences
Brent Lashuk, Marco Pineda, Salma AbuBakr, Daria Boffito, Viviane Yargeau
Summary: This research evaluates the performance of photocatalytic ozonation for removing 5 PFAS from water using a WO3/TiO2 catalyst and UVA-visible radiation. The results show that photocatalytic ozonation has low efficiency in degrading PFAS, highlighting the need for further evaluation of different catalysts or treatment conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Xixi Chen, Shujuan Zhan, Dingsheng Chen, Chun He, Shuanghong Tian, Ya Xiong
Summary: The surface and bulk oxygen vacancies in grey Fe doped CeO2-sigma can be tuned to affect light absorption, charge transfer, and catalytic activity, ultimately enhancing catalytic activity by producing more reactive oxygen species and accelerating electron transfer. Surface oxygen vacancies facilitate ozone adsorption, while bulk oxygen vacancies promote ozone dissociation into reactive surface oxygen.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Linsen Zhang, Guanhua Meng, Baohe Liu, Xiaodong Ge
Summary: This study investigates the performance of Bi2WO6/TiO2 heterojunction for photocatalytic ozonation degradation and mineralization of sulfamethoxazole under simulated sunlight. The BT composites show high degradation efficiency and excellent recyclability and stability.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Review
Chemistry, Physical
Dafu Jiang, Tunmise Ayode Otitoju, Yuanyuan Ouyang, Noor Fazliani Shoparwe, Song Wang, Ailing Zhang, Sanxi Li
Summary: TiO2 is a widely used semiconductor material in various fields, but its photocatalytic activity in UV light is low; to enhance its efficiency, metal ions are used to modify TiO2 by increasing active sites on the crystal surface or inhibiting electron-hole recombination rates.
Article
Chemistry, Physical
Lifen Su, Xiaoyu Liu, Wei Xia, Bin Wu, Changjiang Li, Bo Xu, Bin Yang, Ru Xia, Jianhua Zhou, Jiasheng Qian, Lei Miao
Summary: In this work, MOF-derived C/TiO2 composites with simultaneous photothermal and photocatalytic functions are designed for producing freshwater sewage. The carbonized UiO-66-NH2 (Ti) layer exhibits high water evaporation efficiency of 94% under 1.0 sun irradiation, and can simultaneously degrade organic pollutants with an efficiency of 92.7% during solar-driven water evaporation. This bifunctional material provides a new approach for solar-driven water evaporation and photocatalytic degradation of organic pollutants synergistically.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Sorin Marius Avramescu, Irina Fierascu, Radu Claudiu Fierascu, Roxana Ioana Brazdis, Angel Vasile Nica, Claudia Butean, Elena Alina Olaru, Sorin Ulinici, Marian Nicolae Verziu, Anca Dumitru
Summary: Nanosystems TiO2-MexOy showed efficient catalytic ozonation performance in removing paracetamol from water, reducing the risk of this drug to aquatic ecosystems. The process was also simplified by avoiding the need for catalyst separation.
Article
Materials Science, Multidisciplinary
Svetlana A. Kuznetsova, Olga S. Khalipova, Konstantin V. Lisitsa, Liliya A. Selunina, Victor V. Khasanov, Alexandra G. Malchik, Yu-Wen Chen
Summary: Hierarchical MoO3/TiO2-SiO2 layered spherical composites were synthesized on anion exchanger template, and their properties and photocatalytic performance were characterized. The formation of TiO2-SiO2 shell on the MoO3 core led to lower oxygen vacancy concentrations and reduced bandgap width. The MoO3/TiO2-SiO2 composites showed higher photocatalytic activity.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Physical
Yuxuan Zhao, Lingzhi Nie, Hongli Yang, Kai Song, Huilin Hou
Summary: In this work, mesoporous TiO2/In2O3 nanofibers photocatalyst were fabricated via electrospinning and hydrothermal method. The photocatalytic performance for organic decomposition was studied, and it was found that TiO2/In2O3 composites showed significantly enhanced efficiency compared to pristine TiO2 and In2O3 photocatalysts.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Review
Environmental Sciences
Mojtaba Rostami, Alireza Badiei, Mohammad Reza Ganjali, Mehdi Rahimi-Nasrabadi, Mastoureh Naddafi, Hassan Karimi-Maleh
Summary: Significant efforts have been made in environmental research towards photocatalytic degradation of organic pollutants. Titanium dioxide nano-architectures have been widely used in water purification applications, and various designs have been explored to enhance photocatalytic activity. This review summarizes the developments in nano-architectural design of TiO2 photocatalysts and focuses on factors that improve their efficiency.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Eleonora Pargoletti, Simone Verga, Gian Luca Chiarello, Mariangela Longhi, Giuseppina Cerrato, Alessia Giordana, Giuseppe Cappelletti
Article
Materials Science, Multidisciplinary
Luigi D'Avico, Ruben Beltrami, Eleonora Pargoletti, Stefano P. M. Trasatti, Giuseppe Cappelletti
Article
Electrochemistry
Stefano Americo, Eleonora Pargoletti, Raffaella Soave, Fausto Cargnoni, Mario Italo Trioni, Gian Luca Chiarello, Giuseppina Cerrato, Giuseppe Cappelletti
Summary: The mechanism of acetone sensing by WO3 was investigated using a combination of experimental and theoretical approaches. The results showed that acetone adsorption and oxidation reaction can occur in the presence of surface oxygen vacancies, with the sensor response being dependent on the inert/oxidative atmosphere and surface oxygen population. These findings could guide future studies on potential reaction products and the engineering of nanomaterials with specific surface features for enhanced sensing properties.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Eleonora Pargoletti, Valeria Comite, Paola Fermo, Valentina Sabatini, Giuseppe Cappelletti
Summary: The deterioration of Cultural Heritage due to water percolation and air pollutants has been studied with novel acrylic and siloxane-based resins. By adding specific additives, the surface hydrophobicity was improved, water absorption decreased, and water vapor permeability was slightly reduced. These modified commercial coatings showed promising potential for the protection of historical monuments after accelerated UV aging and outdoor exposure tests.
Article
Polymer Science
Valentina Sabatini, Laura Pellicano, Hermes Farina, Eleonora Pargoletti, Luisa Annunziata, Marco A. Ortenzi, Alessandro Stori, Giuseppe Cappelletti
Summary: The combination of different acrylate-based polymers improved the performance of polyacrylate microcapsules, demonstrating high stability and efficiency. Through the synthesis of complex BUMA based terpolymers and linear copolymers, slow and fast releasing microcapsules were achieved for controlled release of active substances.
Article
Chemistry, Physical
Carolina Cionti, Tommaso Taroni, Valentina Sabatini, Daniela Meroni
Summary: The study developed a new oxide-based construct for the controlled release of cinnamaldehyde catalyzed by acidic pH, achieving fast release in a pH 5.0 environment through imine chemistry. Additionally, the method demonstrated versatility for both powders and macroscopic materials, with the ability to regenerate fouled films upon UV irradiation, paving the way for reusable devices for cinnamaldehyde release.
Review
Chemistry, Physical
Mohamed Gar Alalm, Ridha Djellabi, Daniela Meroni, Carlo Pirola, Claudia Letizia Bianchi, Daria Camilla Boffito
Summary: This paper provides a critical overview of the challenges limiting large-scale application of photocatalysis in air and water/wastewater purification, and discusses approaches to tackle these shortcomings reported in the literature, such as the design of photocatalytic reactors, degradation of micropollutants in water matrices, and development of gas-phase reactors with optimized contact time and irradiation.
Article
Chemistry, Multidisciplinary
Eleonora Pargoletti, Marco Aldo Ortenzi, Giuseppe Cappelletti
Summary: A successful wet chemical method was adopted to synthesize highly concentrated aqueous silver nanoparticles with different polymeric stabilizing agents, resulting in primary colored sols. UV-stable PVP-based silver films were fabricated, contrasting with PVA-based films which degraded during UV aging tests, leading to instability and nanoparticle aggregation.
Article
Chemistry, Multidisciplinary
Andrea Carra, Luigi Falciola, Giuseppe Cappelletti, Lavinia Morosi, Enrico Davoli
Summary: The use of nanoparticles in MALDI imaging allows for the reconstruction of chemical images of solid objects revealed in fingerprints, providing insight into the molecular distribution of endogenous and exogenous compounds. The technique also enables the detection of contact between skin and contaminated objects with chemical images that maintain the shape of the objects.
APPLIED SCIENCES-BASEL
(2021)
Review
Materials Science, Multidisciplinary
Eleonora Pargoletti, Luca Rimoldi, Daniela Meroni, Giuseppe Cappelletti
Summary: This article provides a selective overview of the current understanding of VOC photocatalytic oxidation, with a focus on ethanol, acetaldehyde, and acetic acid. It discusses the adsorption of these molecules on the photocatalyst surface, reaction intermediates, and the role of photocatalyst features in directing adsorption and oxidation phenomena. Gaps in our knowledge, such as the effect of air humidity, multi-pollutant interactions, and deactivation pathways, are critically discussed. Attempts to model VOC degradation in realistic conditions are also reviewed.
INTERNATIONAL MATERIALS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Mario Italo Trioni, Fausto Cargnoni, Stefano Americo, Eleonora Pargoletti, Gian Luca Chiarello, Giuseppe Cappelletti
Summary: In chemiresistive devices optimizing sensitivity and selectivity towards Volatile Organic Compounds (VOCs) is crucial. Experimental measurements showed a two orders of magnitude higher sensor response of a WO3 chemiresistor towards gaseous acetone compared to toluene, with Density Functional Theory indicating different electronic structure perturbations upon molecule adsorption.
Article
Chemistry, Physical
Denise Cavuoto, Nicoletta Ravasio, Federica Zaccheria, Marcello Marelli, Giuseppe Cappelletti, Sebastiano Campisi, Antonella Gervasini
Summary: A simple organosilane-grafting protocol was used to prepare a copper heterogeneous catalyst with tunable wettability properties. The catalyst exhibited high selectivity and yield in the hydrogenation reaction of a platform molecule, gamma-valerolactone. Characterization techniques confirmed the surface modification while preserving the hydrogenation activity of the metallic phase.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Riccardo Semproli, Marina Simona Robescu, Sara Sangiorgio, Eleonora Pargoletti, Teodora Bavaro, Marco Rabuffetti, Giuseppe Cappelletti, Giovanna Speranza, Daniela Ubiali
Summary: A library of alkyl galactosides synthesized as non-ionic surfactants showed that esters of galactopyranosides are superior to those of galactofuranosides in terms of interfacial tension and emulsifying properties. The enantiopure n-butyl 6-O-palmitoyl-beta-D-galactoside, prepared by the fully enzymatic route, led to the most stable emulsion. These findings suggest the potential use of lactose-rich cheese whey to obtain bio-based surfactants.
Article
Chemistry, Multidisciplinary
Jacopo F. A. A. Amari, Sara Sangiorgio, Eleonora Pargoletti, Marco Rabuffetti, Federica Zaccheria, Fabio Usuelli, Valeria Quaranta, Giovanna Speranza, Giuseppe Cappelletti
Summary: Polyglycerol fatty acid esters (PGFAEs) were synthesized using enzymatic esterification and their emulsifying properties were compared with chemically synthesized and commercially available esters.
Article
Chemistry, Physical
Leonardo Lo Presti, Valentina Pifferi, Giovanni Di Liberto, Giuseppe Cappelletti, Luigi Falciola, Giuseppina Cerrato, Michele Ceotto
Summary: Nanocomposites play a crucial role in the current nanotechnology revolution, particularly in the fields of Green Chemistry, sensors, and pollutant remediation. This study explores the physics of 2D-heterojunctions applied to 3D patchworks of anatase and brookite mixed crystallites, known as multi-phase polymorphs. The research demonstrates the behavior of anatase-brookite interphase as a nano-diode and nanocapacitor, shedding light on the atomic scale understanding of nanotitania photocatalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
