Article
Chemistry, Multidisciplinary
Alexandru Enesca, Luminita Andronic
Summary: A Cu2O/SnO2/WO3 heterostructure was prepared by a three-steps sol-gel method and deposition as film by spray pyrolysis, showing high photocatalytic activity and good degradation effect on pesticides.
Article
Green & Sustainable Science & Technology
Fernando Fresno, Maria U. Gonzalez, Lidia Martinez, Marcial Fernandez-Castro, Mariam Barawi, Ignacio J. Villar-Garcia, Jimena Soler-Morala, Patricia Renones, Monica Luna, Yves Huttel, Victor A. Pena O'Shea, Jose M. Garcia-Martin
Summary: This work reports the preparation of titanium dioxide nanocolumnar structures by magnetron sputtering and thermal annealing, with further functionalization with gold resulting in well-dispersed Au nanoparticles. The resulting nanostructures exhibit photocatalytic self-cleaning activity, improved charge separation at the Au/TiO2 interface, and increased hydrophobicity of the surface, unaffected by the presence of Au nanoparticles.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Construction & Building Technology
Krishnan U. Ambikakumari Sanalkumar, En-Hua Yang
Summary: Incorporating nano-TiO2 particles into geopolymer can enhance the material's compressive strength, total solar reflectance, photoinduced hydrophilicity, and contaminant decomposition properties. TiO2 acts as fillers in geopolymer, densifying the binder and improving its overall performance.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Engineering, Environmental
Javier Fragoso, Davide Barreca, Lorenzo Bigiani, Alberto Gasparotto, Cinzia Sada, Oleg I. Lebedev, Evgeny Modin, Ivana Pavlovic, Luis Sanchez, Chiara Maccato
Summary: This study presents the use of heterostructures based on beta-Fe2O3 for De-NOx photocatalysis, fabricated by chemical vapor deposition of Fe2O3 and functionalized with CuO or WO3. The modulation of material performance by forming heterostructures enables efficient removal of nitrogen oxides. The improved photoactivity is attributed to matched band edges and increased oxygen defectivity in the target heterostructures.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
P. Birnal, M. C. Marco de Lucas, I. Pochard, F. Herbst, O. Heintz, L. Saviot, B. Domenichini, L. Imhoff
Summary: TiO2-Au composite planar films and inverse opals were synthesized using ALD, showing excellent photocatalytic performance. The results highlight the potential of ALD in the field of photocatalysis.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Xabier Sandua, Pedro J. Rivero, Joseba Esparza, Jose Fernandez-Palacio, Ana Conde, Rafael J. Rodriguez
Summary: This work presents the design and characterization of functional photocatalytic coatings achieved by combining two different deposition techniques. Firstly, a poly(acrylic acid) + beta-Cyclodextrin electrospun fiber mat was deposited using the electrospinning technique, followed by a thermal treatment to enhance adhesion and mechanical resistance. Secondly, a layer-by-layer assembly process was employed to immobilize metal oxide particles onto the electrospun fiber mat. The coatings were characterized using scanning electron microscopy and atomic force microscopy, showing changes in fiber diameter and surface roughness. The wettability properties of the coatings were also observed to change with the incorporation of different metal oxides. The photocatalytic efficiency of the coatings was analyzed by studying the degradation of a dye, demonstrating nearly complete discoloration in the irradiated area.
Article
Engineering, Environmental
Guanyu Liu, Huiyun Xia, Yanhui Niu, Xu Zhao, Gengtong Zhang, Lifang Song, Huaxin Chen
Summary: The self-cleaning photocatalytic building coating prepared in this paper showed excellent durability and antifouling properties after 450 days of practical application on the external wall. The coating's ability to degrade organic pollutants on the surface and resist adhesion of powder particles confirmed its self-cleaning performance. Additionally, the coating demonstrated a mutual benefit effect of self-cleaning and photocatalysis, which could be maintained over the long term.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Xuan Wang, Hao Ding, Guocheng Lv, Run Zhou, Ruixin Ma, Xifeng Hou, Jianmeng Zhang, Wei Li
Summary: In this study, SiO2-TiO2 composite particles were successfully synthesized and used to fabricate superhydrophilic self-cleaning coatings on various substrates. The coatings demonstrated excellent photocatalytic degradation performance and superhydrophilicity. The results suggest that the as-prepared SiO2-TiO2 coating has a great potential for various applications.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Wenqing Cheng, Huixue Ren, Yanxue Chen, Daoji Wu, Shuai Zhang, Chunfeng Yu, Fangjun Li
Summary: Different membrane compositions were designed to improve the self-cleaning and low emissivity of the membrane. The WO3/Mo/CrNi/TiO2 composite film prepared by magnetron sputtering technology showed complementary effect with different argon/oxygen ratios of TiO2 layer and film thicknesses. The microstructure characterization proved that the self-cleaning function of the composite film was determined by the photocatalytic properties and superhydrophilic properties of the TiO2.
FRONTIERS IN ENERGY RESEARCH
(2022)
Review
Green & Sustainable Science & Technology
Muhammad Ikram, Mahak Rashid, Ali Haider, Sadia Naz, Junaid Haider, Ali Raza, M. T. Ansar, Mohammad Kashif Uddin, Nageh M. Ali, Sameh S. Ahmed, Muhammad Imran, Sobia Dilpazir, Qasim Khan, Muhammad Maqbool
Summary: Industrial waste is a primary source of toxic pollutants and heavy metal contaminants, requiring treatment for environmental protection. Photocatalysis is an effective and economical method for removing toxic ions from industrial waste, particularly for large organic molecules found in pesticides and dyes. Advanced techniques for synthesizing different types of photocatalysts and their potential applications for organic dye degradation have been described in detail to help researchers design more suitable nano-photocatalytic systems.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Xabier Sandua, Pedro J. Rivero, Jose F. Palacio, Joseba Esparza, Rafael Rodriguez
Summary: This study presents an alternative method for evaluating the photodegradation behavior of different dyes by using specific coating and light sources, demonstrating its validity and reliability in measuring photocatalytic activity in all dyed coatings.
Article
Engineering, Chemical
Adel A. Ismail, L. Al-Hajji, I. S. Azad, A. Al-Yaqoot, N. Habibi, M. Alseidi, Sh. Ahmed
Summary: The study found that the Ag/TiO2 films coated with silver nanoparticles exhibited excellent antibacterial properties, with the best inhibitory effect on Vibrio parahaemolyticus, Aeromonas hydrophila, and Bacillus subtilis. Exposing the films to direct light for 3 hours was sufficient to reduce the bacterial counts. The higher antibacterial activity of Ag/TiO2, Ag/ZnO, and Ag/Fe2O3 films compared to pristine ZnO, Fe2O3, and TiO2 films might be attributed to the surface plasmon resonance of Ag nanoparticles, which facilitated the separation of charge carriers and enhanced the antibacterial activity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Crystallography
Federico Giuffrida, Lucia Calcagno, Gianni Pezzotti Escobar, Massimo Zimbone
Summary: The photocatalytic properties of TiO2/FeO3 and TiO2/WO3 nanocomposites were investigated for the degradation of methylene blue. The non-conventional Doctor Blade technique was proposed as an easy and inexpensive method for material preparation. The use of solid substrates rather than powders and the high surface area of nanoparticles improved the photodegradation efficiency.
Article
Environmental Sciences
Bablu Basumatary, Rajmoni Basumatary, Anjalu Ramchiary, Dimpul Konwar
Summary: Methylene blue degradation in wastewater was achieved effectively through the photocatalytic activity of Ag@TiO2/WO3 nanocomposite, which was prepared by a modified sol-gel precipitation route. The enhanced photocatalytic performance was attributed to reduced bandgap, improved charge carrier transfer efficiency, and plasmonic sensitization of Ag, resulting in a 25 times higher degradation rate compared to commercial DP25 photocatalyst under visible light.
Article
Materials Science, Ceramics
Adel A. Ismail, Feras Alzubi, L. A. Al-Hajji, M. Alseidi, Sh Ahmad, A. Alduweesh
Summary: Customized site-specific anti-soiling nanocoatings are developed for better utilization in dry regions with natural dust fallout. The SiO2, ZnO/SiO2, and TiO2/SiO2 films used for self-cleaning applications on solar cells showed improved power output and reduced dust accumulation. The TiO2/SiO2 nanocoating exhibited good durability and consistent performance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Alisson R. Cadore, Raphaela de Oliveira, Raphael Longuinhos, Veronica de C. Teixeira, Danilo A. Nagaoka, Vinicius T. Alvarenga, Jenaina Ribeiro-Soares, Kenji Watanabe, Takashi Taniguchi, Roberto M. Paniago, Angelo Malachias, Klaus Krambrock, Ingrid D. Barcelos, Christiano J. S. de Matos
Summary: Naturally occurring van der Waals crystals, such as the phlogopite mineral explored in this study, have attracted significant interest in the nanomaterial research field. The researchers conducted a high throughput characterization of phlogopite and discovered its stable nature, easy obtainability, atomically flat surface, and lower bandgap in monolayers and few-layers. They also investigated the presence of iron impurities in natural phlogopite, which affected its bandgap. Furthermore, the researchers successfully combined phlogopite crystals with 1L-WS2 to create ultrathin van der Waals heterostructures, showing enhanced optical quality.
Article
Chemistry, Multidisciplinary
Thiago R. S. Malagrino, Anna P. Godoy, Juliano M. Barbosa, Abner G. T. Lima, Nei C. O. Sousa, Jairo J. Pedrotti, Pamela S. Garcia, Roberto M. Paniago, Lidia M. Andrade, Sergio H. Domingues, Wellington M. Silva, Helio Ribeiro, Jaime Taha-Tijerina
Summary: In this study, flower-like molybdenum disulfide (MoS2) microspheres were successfully synthesized with polyethylene glycol (PEG) to form MoS2-PEG. Gold nanoparticles (AuNPs) were incorporated to form hierarchical MoS2-PEG/Au microstructures, showing good cellular viability on both tumoral and non-tumoral cells. The hybrid nanomaterials demonstrated potential for cancer diagnosis and therapy with their multifunctional characteristics.
Article
Chemistry, Physical
Higor O. Lopes, Brenda S. D. Frachoni, Barbara N. Nunes, Priscila R. Teixeira, Roberto M. Paniago, Detlef W. Bahnemann, Leonardo G. Paterno, Antonio Otavio T. Patrocinio
Summary: Highly stable Au/K4-xHxNb6O17 nanocomposites were prepared and successfully applied as photocatalysts for H-2 evolution. Different Au loadings were studied and compared with plain Au nanoparticles. The study showed that Au(PEI) nanoparticles could effectively promote the H-2 evolution reaction.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Detlef W. Bahnemann, Alexei V. Emeline, Anna V. Shurukhina, Nikita I. Selivanov, Ibrahim M. Sharaf
Summary: This study reports experimental results that demonstrate the impact of intrinsic defects induced by either photoinduction or doping on excitonic photoluminescence in CsPbBr3 halide perovskite. The findings show that an increase in the number of intrinsic defects leads to stronger photoluminescence quenching, which is directly correlated to the absorption of intrinsic defects and excitonic luminescence intensity. The proposed mechanism suggests that excitonic luminescence quenching is caused by exciton decay at the intrinsic defect sites, with the efficiency depending on the type and charge of the cations near the defects, increasing in the order Ag+ < Pb2+ < Bi3+.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Energy & Fuels
Detlef Bahnemann, Peter Robertson, Chuanyi Wang, Wonyong Choi, Helen Daly, Mohtaram Danish, Hugo de Lasa, Salvador Escobedo, Christopher Hardacre, Tae Hwa Jeon, Bupmo Kim, Horst Kisch, Wei Li, Mingce Long, M. Muneer, Nathan Skillen, Jingzheng Zhang
Summary: As nations transition towards low or net zero carbon economies due to global climate change, the need for practical alternative fuels is urgent. Hydrogen gas is considered one of the most desirable substitutes for traditional hydrocarbons, but obtaining "green" hydrogen from low or zero carbon footprint sources presents challenges. Research focuses on practical techniques for producing "green" hydrogen through photocatalytic or photoelectrocatalytic processes. However, the capability of this technology to produce hydrogen at scale has faced significant issues. This road map article explores various aspects of photocatalytic and photoelectrocatalytic hydrogen generation, including processes, materials science, reactor engineering, and biomass reforming applications.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Reshalaiti Hailili, Xiaokaiti Reyimu, Zelong Li, Xu Lu, Detlef W. Bahnemann
Summary: Effective removal of dilute nitrogen oxide (NO, ppb) without NO2 emission is still challenging in environmental pollution control. The construction of photocatalysts with diversified microstructures and atomic arrangements has been found to promote NO adsorption, activation, and complete removal without secondary pollution. In this study, the microstructure of ZnO photocatalysts was regulated by altering the reaction temperature and alkalinity, resulting in enhanced NO removal and reduced NO2 yields through defect-related surface-interface aspects. Mechanistic exploitations revealed that regulated microstructures, defect-related charge carrier separation, and strengthened surface interactions contributed to improved NO removal and simultaneous avoidance of NO2 formation. This investigation sheds light on the facile regulation of microstructures and the roles of surface chemistry in the oxidation of low concentration NO in the ppb level upon light illumination.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Muhammad Kamran, Tarek A. Kandiel, Safwat Abdel-Azeim, Mohamed A. Morsy, Detlef W. Bahnemann
Summary: This article explores TiO2 nanomaterials as promising photocatalysts for NOx depollution from air under sunlight irradiation. Experimental results show that brookite TiO2 exhibits comparable photocatalytic activity to benchmark TiO2 P25 and higher selectivity towards the conversion of NOx into nitrate ions. The enhanced selectivity is attributed to the higher density of defects on brookite TiO2 surfaces, which facilitates the adsorption of NO2 while favoring the dissociative adsorption of water.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Jing Ma, Yang Tang, Gui Lu, Yu Wang, Wenke Niu, Dong Fu, Kai Zhang, Detlef W. Bahnemann, Jia Hong Pan
Summary: A PVDF/CB/TiO2 conductive membrane was fabricated through the hybridization of PVDF, mesoporous TiO2 spheres (MTS), and carbon black (CB). The membrane showed a highly porous structure and excellent photoelectrocatalytic (PEC) properties, achieving a high decolorization rate of methylene blue (MB) in a continuous cross-flow filtration process.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Haoran Wang, Reshalaiti Hailili, Xiaoyu Jiang, Guoliang Yuan, Detlef W. Bahnemann, Xiong Wang
Summary: The successful construction of heterojunction facilitates the improvement of solar light utilization efficiency. In this study, visible-light-driven AgBr was deposited on the surface of lamellar BiVO4 to enhance charge carrier separation and photocatalytic effectiveness. The catalyst with an optimal AgBr/BiVO4 ratio exhibited significantly enhanced decolorization ability and high stability. The S-scheme carrier migration mechanism was investigated, revealing the effective charge carrier separation/transfer and the excellent photocatalytic performance.
Article
Chemistry, Multidisciplinary
Jakob Schlenkrich, Franziska Luebkemann-Warwas, Rebecca T. Graf, Christoph Wesemann, Larissa Schoske, Marina Rosebrock, Karen D. J. Hindricks, Peter Behrens, Detlef W. Bahnemann, Dirk Dorfs, Nadja C. Bigall
Summary: Destabilizing ligand-stabilized semiconductor nanocrystal solutions results in the formation of macroporous self-supporting nanocrystal networks called hydrogels, which have high surface accessibility. The delocalization of charge carriers in these gels extends their mobility and enhances photocatalytic reactions. Recent advances in colloid chemistry enable the synthesis of nanocrystals with specific physicochemical properties, which, when combined with nanocrystal-based hydrogels, can lead to novel materials with optimized photocatalytic properties. This study demonstrates that CdSe quantum dots, CdS nanorods, and CdSe/CdS dot-in-rod-shaped nanorods as nanocrystal-based hydrogels show significantly higher hydrogen production rates compared to their ligand-stabilized nanocrystal solutions. The gel synthesis through controlled destabilization by ligand oxidation ensures high surface-to-volume ratio, facilitates photocatalytic hydrogen production without a co-catalyst, and overcomes colloidal instability issues in photocatalysis. X-ray photoelectron spectroscopy and photoelectrochemical measurements confirm the advantageous properties of these 3D networks for photocatalytic hydrogen production.
Editorial Material
Chemistry, Physical
Kangwoo Cho, Wonyong Choi, Detlef Bahnemann
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Editorial Material
Chemistry, Physical
Kangwoo Cho, Wonyong Choi, Detlef Bahnemann
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Engineering, Environmental
Haitao Ren, Fan Qi, Abdelkader Labidi, Ahmed A. Allam, Jamaan S. Ajarem, Detlef W. Bahnemann, Chuanyi Wang
Summary: In this study, carbon quantum dots (CQDs) with excellent fluorescence properties were prepared from apple leaf waste and used as a fluorescent probe for the detection of Fe3+ in aqueous environments. The CQDs exhibited high fluorescence stability, specific recognition ability for Fe3+, and recyclability.
ACS ES&T ENGINEERING
(2023)
Article
Engineering, Environmental
Baker Rhimi, Mohsen Padervand, Houda Jouini, Shahnaz Ghasemi, Detlef W. Bahnemann, Chuanyi Wang
Summary: This paper reviews the latest progress in NOx photocatalytic removal, discussing key issues such as surface/interface engineering, reaction mechanism, defect chemistry, facet controlling, and stability of photocatalytic systems. It also highlights the challenges faced in NOx removal and summarizes the advancements and strategies in utilizing semiconducting materials and MOFs for this purpose.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Chemistry, Applied
Nan Li, Chuanyi Wang, Ke Zhang, Haiqin Lv, Mingzhe Yuan, Detlef W. Bahnemann
Summary: This article introduces the application of semiconductor photocatalytic technology in the treatment of low concentration of NO, which can effectively reduce the harm of NO to the environment and human health, and has high economic benefits.
CHINESE JOURNAL OF CATALYSIS
(2022)