Article
Electrochemistry
Camila D. Mendonca, Shahid U. Khan, Vanoushe Rahemi, Sammy W. Verbruggen, Sergio A. S. Machado, Karolien De Wael
Summary: The impregnation of size-controlled gold nanoparticles (AuNPs) on an anatase TiO2 structure (AuNPs@TiO2) was studied for the photoelectrochemical detection of hydroquinone (HQ) under visible light illumination integrated into a flow injection analysis (FIA) setup. The presence of AuNPs improved the photoelectrocatalytic activity of TiO2 and prevented charge recombination, with reactive oxygen species (ROS) generated during visible light illumination participating in the oxidation process of HQ. The study illustrated that impregnation of AuNPs in TiO2 allows sensitive detection of phenolic substances under green laser illumination using a photoelectrochemical flow system.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Environmental
Rudzani Ratshiedana, Olayemi Jola Fakayode, Ajay Kumar Mishra, Alex Tawanda Kuvarega
Summary: The study focuses on the impact of silver ion doping on the photocatalytic activity of titanium dioxide for the degradation of tartrazine. Results show that optimal degradation of tartrazine can be achieved with a certain amount of doping, suggesting potential applications for removing similar organic pollutants from water.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Qiang Sun, Xuebin Hu, Qiang He, Manli Sun, Liangliang Dai, Sarfaraz Khan, Huaili Zheng
Summary: This study achieved the spatiotemporal coagulation and degradation of diclofenac sodium under visible light irradiation by modifying TiO2 nanoparticles. The modified TiO2 nanoparticles showed activated photocatalytic activity and improved photocatalytic efficiency. Additionally, it was found that the coagulant could be directly reused multiple times.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Physical
Zhen Tang, Longhua Xu, Kaiqian Shu, Jie Yang, Haijun Tang
Summary: The combination of brown TiO2 and 2D MoS2 nanosheets enhances photocatalytic activity, visible light absorption, active site expansion, and the separation and transfer of photogenerated charges.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Green & Sustainable Science & Technology
Sangmo Kang, Jungho Hwang
Summary: This study presents a strategy for fabricating reduced graphene oxide-wrapped Ag/TiO2 nanofibers and demonstrates their efficient CO2 photoreduction performance under visible light.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Multidisciplinary
Yao Zhu, Siyuan Fang, Shaoqin Chen, Youjie Tong, Chunling Wang, Yun Hang Hu
Summary: The study focuses on photocatalytic ethane conversion into CH3CH2OOH using a highly efficient visible-light-responsive photocatalyst, Au/WO3. The introduction of thermal energy significantly increased the production yield, and the reaction pathway was revealed through trapping active species and isotope-labeling reactants.
Article
Engineering, Environmental
C. Ashina, N. Pugazhenthiran, P. Sathishkumar, M. Selvaraj, Mohammed A. Assiri, Chandrasekaran Rajasekaran, M. A. Gracia-Pinilla, R. V. Mangalaraja
Summary: In this study, Ni@NiFe2O4/TiO2 magnetic nanocomposites were prepared via a simple sonochemical route, and they showed excellent photocatalytic activity and activation of peroxymonosulphate under direct solar light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Amit Kumar Verma, Prerna Tripathi, Akash Dubey, Niraj Kumar Vishwakarma, A. S. K. Sinha, Shikha Singh
Summary: This article describes a study on hydrogen generation from aqueous methanol over a TiO2 up-conversion (CeF3:Ho3+) nanosystem (CHT) under visible light irradiance. CeF3:Ho3+ nanoparticles (about 4 to 8 nm) were synthesized and incorporated into TiO2 using a simple polyol reduction method. The successful formation of a CeF3:Ho3+-incorporated TiO2 nanosystem was confirmed through various characterizations. The results showed that the CeF3:Ho3+-incorporated TiO2 nanosystem exhibited enhanced photocatalytic activity and could be used as an effective photocatalyst for sustainable hydrogen generation under visible light irradiance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zeju Zhang, Mang Niu, Wei Li, Chenfeng Ding, Peitao Xie, Yongxin Li, Lili Chen, Xiaopeng Lan, Chunlei Liu, Xiaodong Yan, Xuewei Fu, Yaochun Liu, Yuan Liu, Dapeng Cao, Jingjie Dai, Xiaofen Hong, Chunzhao Liu
Summary: This study introduces a novel composite material composed of carbon nitride and anatase nanocrystals. The addition of ultrafine carbon nitride induces the generation of oxygen vacancies and the growth of anatase (001) facets. The composite exhibits exceptional photocatalytic performance, with a degradation rate of 2,4-dichlorophenol almost 3.8 times higher than pure TiO2 nanofibers. Furthermore, the composite shows excellent degradation efficiency and stability even under low temperature and long-term photocatalytic process.
Review
Chemistry, Multidisciplinary
Jiahao Wang, Xinxin Lv, Zhiyong Jiang
Summary: Asymmetric catalysis is a powerful tool for synthesizing enantioenriched molecules. Deracemization, the direct conversion of a racemic compound to one enantiomer, is an attractive approach with high-atom efficiency. Visible-light-driven photocatalysis has recently emerged as a promising platform for deracemization, overcoming kinetic and thermodynamic challenges in chemical transformations without the need for additional stoichiometric reagents. This review systematically summarizes and discusses the advances in this area, categorizing examples based on energy transfer and single-electron transfer in photocatalysis.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Mikhail Lyulyukin, Tikhon Filippov, Svetlana Cherepanova, Maria Solovyeva, Igor Prosvirin, Andrey Bukhtiyarov, Denis Kozlov, Dmitry Selishchev
Summary: This study confirms that solid uranium oxycompounds and uranyl-grafted materials on nanocrystalline anatase TiO2 exhibit higher photocatalytic activity under visible light, with a significantly higher reaction efficiency compared to commercial photocatalysts.
Article
Engineering, Environmental
Xin Yu, Jielin Huang, Jingjing Zhao, Shuaifei Liu, Dandan Xiang, Yanting Tang, Juan Li, Quanhui Guo, Xinqi Ma, Junwei Zhao
Summary: Efficient visible light photocatalytic elimination of pharmaceutical factory wastewater was achieved by introducing hybrid Ag/AgCl nanoparticles into Ti3+ self-doped TiO2 mesocrystals. The Ag/AgCl@Ti3+-TiO2 mesocrystals showed superior performance in degrading tetracycline under visible light, mainly attributed to the continuous attacks of photo-generated holes and radicals on tetracycline molecules.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Donghwi Cho, Jun Min Suh, Sang-Hyeon Nam, Seo Yun Park, Minsu Park, Tae Hyung Lee, Kyoung Soon Choi, Jinho Lee, Changui Ahn, Ho Won Jang, Young-Seok Shim, Seokwoo Jeon
Summary: Research explores a new class of UV-activated sensing nanoarchitecture made of highly periodic 3D TiO2, optimizing key parameters to achieve 55 times enhanced light absorption and significantly improve gas sensor performance.
Article
Environmental Sciences
Zhengyang Chen, Shui Yu, Jianping Liu, Yamei Zhang, Yuchen Wang, Jiangyi Yu, Ming Yuan, Pengchao Zhang, Wen Liu, Jiaoxia Zhang
Summary: The continuous presence of organic pollutants in industrial wastewater poses a significant threat to human health, necessitating urgent and effective treatment. Photocatalytic degradation technology, specifically the use of TiO2 photocatalysts, provides a viable solution for the removal of organic pollutants. However, the limited absorption of visible light by TiO2 hinders its full utilization. To address this issue, the study developed an environmentally friendly synthesis of Ag-coated on micro-wrinkled TiO2-based catalysts, enabling extended absorption of visible light. The synthesized C/F-Ag-TiO2 composite exhibited a significantly lower band gap energy and achieved a remarkable degradation rate under visible light, making it a promising candidate for highly efficient environmental remediation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Hongfei Shi, Tingting Zhao, Jiabo Wang, Yueting Wang, Zhe Chen, Baolei Liu, Haifeng Ji, Weidong Wang, Guanglei Zhang, Yangguang Li
Summary: A new g-C3N4/PW12/TiO2 composite photocatalyst was fabricated through electrospinning/calcination technique and thermal polymerization method, showing remarkable and stable photocatalytic performance under visible light irradiation. The enhanced performance can be attributed to enhanced adsorption in visible-light region, high specific surface area, and effective separation and transfer of photoinduced charge carriers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Parnia Forouzandeh, Priyanka Ganguly, Ravinder Dahiya, Suresh C. Pillai
Summary: This article reviews various techniques for electrode materials fabrication in supercapacitors, including solution-based chemical techniques, physical methods, and deposition techniques. Combination of multiple synthesis approaches can obtain electrode materials with excellent electrochemical properties.
JOURNAL OF POWER SOURCES
(2022)
Article
Spectroscopy
T. Pandiyarajan, R. Mangalaraja, B. Karthikeyan, R. Udayabhaskar, David Contreras, Selene Sepulveda-Guzman, M. A. Gracia-Pinilla
Summary: Rare earth doped ZnO nanostructures were prepared via wet chemical precipitation, showing morphological transitions and unique characteristics. XRD measurements revealed highly crystalline nature and no alteration in crystal structure by RE doping, while Raman spectra exhibited energy shifts and intensity variations. The enhanced photocatalytic activity and different decolorization efficiencies of MB were observed in RE doped ZnO compared to bare ZnO.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Biotechnology & Applied Microbiology
Devaraj Manoj, Saravanan Rajendran, F. Gracia, M. Naushad, Madhappan Santhamoorthy, Matias Soto-Moscoso, M. A. Gracia-Pinilla
Summary: Vitamins are essential for the body's proper functioning, but they must be obtained through food intake. In this study, a mesoporous structure of titanium dioxide with doped zinc oxide nanocrystals on its surface was developed for the simultaneous determination of vitamin B and vitamin C. The mesoporous structure and zinc oxide nanocrystals enhance the diffusion and electron transfer of vitamins, resulting in significantly enhanced electrochemical signal response.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Review
Engineering, Environmental
Ryan Walden, Irthasa Aazem, Aswathy Babu, Suresh C. Pillai
Summary: This review examines the recent developments in textile-based triboelectric nanogenerator devices, focusing on potential materials and design strategies. It categorizes these devices based on different textile constructs and configurations, and discusses the efficiency of various materials and approaches for improving their output. The review also addresses the major challenges faced by textile-based triboelectric nanogenerator devices and discusses their prospects.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Aswathy Babu, Irthasa Aazem, Ryan Walden, Satyaranjan Bairagi, Daniel M. Mulvihill, Suresh C. Pillai
Summary: This review presents the recent advances in triboelectric nanogenerators (TENGs), including material combinations, fabrication methods, and application areas. Electrospun nanofiber materials prepared by electrospinning exhibit remarkable physical and chemical characteristics for enhancing TENG performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Devaraj Manoj, Saravanan Rajendran, Mu. Naushad, Madhappan Santhamoorthy, F. Gracia, Matias Soto Moscoso, M. A. Gracia-Pinilla
Summary: In this study, mesoporous copper oxide (CuO) nanocrystals decorated on TiO2 nanostructures were successfully synthesized to form p-n heterojunction nanocomposites. The resulting CuO-TiO2 nanocomposite showed good electrochemical performance on modified GC electrode, enabling efficient oxidation of catechol with wide linear range and excellent sensing properties, capable of detecting catechol in real samples like lake and river water.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Devaraj Manoj, Saravanan Rajendran, F. Gracia, Sabah Ansar, Madhappan Santhamoorthy, Matias Soto-Moscoso, M. A. Gracia-Pinilla
Summary: The capacity to generate a constant signal response from an enzyme on an electrode surface has been a fascinating topic of research for the past three decades. The immobilization of dual enzymes on the electrode surface using mesoporous materials allows for high loading of enzymes and provides a protective environment, resulting in long-term stability. The utilization of a redox mediator in second-generation biosensing of hydrogen peroxide improves the selectivity and sensitivity of the sensor.
ENVIRONMENTAL RESEARCH
(2022)
Review
Chemistry, Applied
Keith Sirengo, Aswathy Babu, Barry Brennan, Suresh C. Pillai
Summary: This review discusses the safety contributions of ionic liquid electrolytes for high-temperature applications in sodium-ion batteries. The thermal stability of ionic liquids is found to be the main contributor to cell safety and cycle stability. Highly concentrated ionic liquid electrolyte systems are potential solutions for sodium-ion battery applications that require electrolyte safety, capacity, and cycle stability.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xiaofei Li, Chuling Guo, Suresh C. Pillai, Xiaohu Jin, Qian Yao, Yanping Bao, Xueding Jiang, Guining Lu, Hailong Wang, Zhi Dang
Summary: Facet-dependent toxic metal adsorption of iron oxides can be influenced by organic acids, but the coadsorption mechanisms of specific facets are not fully understood. This study investigated the Cr(VI) adsorption onto lepidocrocite-exposed facets in the presence of oxalic acid and found that the adsorption capacity differed between rod-like lepidocrocite and plate-like lepidocrocite. The competitive adsorption processes between oxalic acid and Cr(VI) showed facet dependence and were determined by the interfacial interactions and geochemical behaviors of Cr(VI) in polluted environments.
Review
Chemistry, Physical
P. Suja, Jubi John, T. P. D. Rajan, Gopinathan M. Anilkumar, Takeo Yamaguchi, Suresh C. Pillai, U. S. Hareesh
Summary: Graphitic carbon nitride (g-C3N4), a visible light active two-dimensional organic semiconductor, is being increasingly explored as a potential matrix for developing heterogeneous single atom catalysts. This article summarizes the synthetic strategies for g-C3N4 based single atom catalysts (SACs) and discusses advanced characterization techniques used to determine their electronic and geometric structure. The potential applications of g-C3N4 SACs in photocatalysis, organic reaction catalysis, and electrocatalysis are reviewed, along with the challenges associated with their practical utility and future prospects in heterogeneous catalysis.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Engineering, Environmental
C. Ashina, N. Pugazhenthiran, P. Sathishkumar, M. Selvaraj, Mohammed A. Assiri, Chandrasekaran Rajasekaran, M. A. Gracia-Pinilla, R. V. Mangalaraja
Summary: In this study, Ni@NiFe2O4/TiO2 magnetic nanocomposites were prepared via a simple sonochemical route, and they showed excellent photocatalytic activity and activation of peroxymonosulphate under direct solar light irradiation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Physical
Satyaranjan Bairagi, Charchit Shahid-ul-Islam, Charchit Kumar, Aswathy Babu, Akshaya Kumar Aliyana, George Stylios, Suresh C. Pillai, Daniel M. Mulvihill
Summary: The integration of advanced nanogenerator technology with conventional textiles has led to the development of textile-based nanogenerators (t-NGs), which have potential for harvesting mechanical energy and powering self-powered electronics. Nanocomposite textiles have been used to enhance the electrical performance of t-NGs. This review discusses the progress in wearable nanocomposite textiles-based piezoelectric and triboelectric nanogenerators, covering the fundamentals, working principles, material selection, and challenges associated with their implementation. Overall, nanocomposite textile based piezoelectric and triboelectric nanogenerators show better electrical output and mechanical strength compared to conventional textile based nanogenerators, but more research is needed to improve their output, stability, and durability.
Article
Chemistry, Physical
Norma A. Ramos-Delgado, Diego A. Pino-Sandoval, Khirbet Lopez-Velazquez, Christos Englezos, Minerva Villanueva-Rodriguezc, Miguel A. Gracia-Pinilla, Nicolas D. Boscher, Han J. G. E. Gardeniers, Arturo Susarrey-Arce
Summary: This study demonstrates the degradation of acetaminophen in water using Fe-BiOBr and solar photo-Fenton process. The results show that Fe-BiOBr is capable of efficiently degrading acetaminophen under mild pH conditions and natural sunlight irradiation.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Engineering, Chemical
Weicheng Xu, Jinzhi Liang, Jianghong Li, Suresh C. Pillai, Fawen Liang, Meng Li, Kaibang Xiao, Jiesen Li, Yu Wang, Xueding Jiang, Zhang Liu, Jingzi Beiyuan, Hailong Wang
Summary: A three-dimensional flower-like zero-valent bimetallic shell/core iron/copper/biochar composite has been synthesized for the removal of antibiotic metronidazole. The study investigates the contribution of different participants in the system and proposes possible activation mechanisms. The composite material has a wide pH range and broad adaptability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Physical
Vignesh Kumaravel, Maria Barbara Maccioni, Snehamol Mathew, Steven J. Hinder, John Bartlett, Michael Nolan, Suresh C. Pillai
Summary: In this study, the impact of Ta doping on the thermal stability of TiO2 was investigated through experimental and theoretical methods. The results showed that Ta doping preserved the anatase content of TiO2 and increased the electron concentration in the crystal lattice. Raman studies also revealed the formation of new Ta bonds. These findings are important for understanding and improving the thermal stability of TiO2.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)