Article
Chemistry, Physical
Shanmuganathan Venkatesan, Yun-Yu Chen, Hsisheng Teng, Yuh-Lang Lee
Summary: This study demonstrates a quick dye adsorption process using electrochemical methods, reducing the fabrication time of dye-sensitized solar cells. The electrodes prepared using constant potential methods show high performance in DSSCs with high efficiencies and low dark current densities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Fengjuan Miao, Fuchen Chu, Bingcheng Sun, Bairui Tao, Peng Zhang, Yu Zang, Paul K. Chu
Summary: This study presents the design and fabrication of a photoanode composed of Au/SnS/TiO2 sensitized with natural dye for dye-sensitized solar cells (DSSCs). By calcination, a layer of spherical nano-TiO2 is prepared, and a layer of nano-SnS is deposited on the TiO2 photoanode using the continuous ion layer adsorption reaction (SILAR). The sensitized Au nanoparticles exhibit enhanced localized surface plasmon resonance (LSPR) effects and electron trapping ability, resulting in improved electron mobility and reduced electron recombination in the DSSC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
Masrianis Ahmad, Huda Abdullah, Nor Yuliana Yuhana, Brian Yuliarto, Mohd Hafiz Dzarfan Othman
Summary: This study investigates the photovoltaic conversion efficiency of TiO2-SiO2-nickel-GO thin films by finding the optimal annealing temperature. It was found that the photoanode annealed at 350 degrees C exhibited better photovoltaic performance with the highest power conversion efficiency of 3.40%.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Chao-Nan Chen, Yu-Wu Wang, Ying-Rong Ho, Chia-Ming Chang, Wei-Chieh Huang, Jung-Jie Huang
Summary: This study utilized liquid-phase deposition to fabricate a TiO2 film on anodizing TNT, increasing the length and dye adsorption capacity of the nanotubes, ultimately enhancing the photoelectric conversion efficiency of the DSSC device.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Bandana Ranamagar, Isaac Abiye, Fasil Abebe
Summary: The Rhodamine-6G derivative Rhd and its metal complexes with aluminum and chromium ions were synthesized and characterized using UV-vis and fluorescence spectroscopy. Dye-sensitized solar cells (DSSCs) were fabricated with Rhd and the metal complexes, and their solar-to-electric power efficiencies were determined through current-density measurements and Electrochemical Impedance Spectroscopy (EIS). The Rhd and Cr3+-sensitized solar cell showed the highest solar to electric power efficiency at 0.16%.
Article
Chemistry, Physical
Hafiz Muhammad Asif Javed, Wenxiu Que, Muhammad Shahid, Akbar Ali Qureshi, M. Afzaal, M. Salman Mustafa, Shahid Hussain, Abdullah Saad Alsubaie, Khaled H. Mahmoud, Zeinhom M. El-Bahy, Ling Bing Kong
Summary: The research investigated the effects of anodization parameters on the growth behavior and top morphology of TiO2 nanotubes. Different TiO2 nanostructures were obtained through electrochemical anodization of Ti foil by varying parameters, and dye sensitized solar cells based on TiO2 nanohexagons showed the highest power conversion efficiency. The efficiency of DSSC was further enhanced through modifications of TiO2 nanohexagons with TiO2 nanoparticles derived from TiCl4.
SURFACES AND INTERFACES
(2021)
Article
Energy & Fuels
Abdullah Atilgan, Abdullah Yildiz
Summary: The development of novel bilayer photoanodes is crucial for efficient dye-sensitized solar cells. In this study, a homojunction photoanode consisting of undoped and Ni-doped TiO2 layers was prepared. By tuning the location of the doped layer, the photoconversion efficiency was greatly improved. The bilayer structure enhanced light absorption, resulting in increased short circuit current and open-circuit voltage.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Fengjuan Miao, Bingcheng Sun, Bairui Tao, Yanchun Wang, Paul K. Chu
Summary: This paper demonstrates the application of a novel ternary nanocomposite MoS2/Ag/TiO2 photoanode in high efficiency plasma dye sensitive solar cell. The ternary nanocomposite MoS2/Ag/TiO2 was successfully synthesized without any hazardous substances. The addition of MoS2 improves the light absorption ability and electron transfer rate of the photoanode, leading to a significant enhancement in the photoelectric conversion efficiency of the dye sensitive solar cell.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Kang-Hun Lee, Seung-Hee Han, Ana Chuquer, Hwa-Young Yang, Jaehi Kim, Xuan-Hung Pham, Won-Ju Yun, Bong-Hyun Jun, Won-Yeop Rho
Summary: This study investigates the change in power conversion efficiency (PCE) of DSSCs by introducing Au nanoparticles (Au NPs) and a scattering layer. It was found that Au NPs enhance electron generation and the scattering layer improves light harvesting, resulting in a significant increase in the PCE of DSSCs. synergistically, the combination of Au NPs and a scattering layer shows promising potential for enhancing electron generation and light harvesting abilities in DSSCs.
Article
Materials Science, Multidisciplinary
S. Vibavakumar, K. D. Nisha, V. S. Manikandan, J. Archana, M. Navaneethan, S. Harish
Summary: This work aims to improve the photovoltaic parameters in DSSCs by introducing a bilayer photoanode composed of Nb2O5 and TiO2. The microstructural, crystalline, and morphological properties of the Nb2O5/TiO2 bilayer were analyzed. The charge transfer processes and electron behavior in the bilayer photoanode were investigated, showing significantly lower charge transfer resistance and improved electron lifetime.
Article
Chemistry, Physical
Hugo G. Lemos, Rodrigo M. Ronchi, Guilherme R. Portugal, Jessica H. H. Rossato, Gurpreet S. Selopal, David Barba, Everaldo C. Venancio, Federico Rosei, Jeverson T. Arantes, Sydney F. Santos
Summary: Dye-sensitized solar cells (DSSCs) are a promising technology for clean energy conversion. This study focuses on enhancing the efficiency of DSSCs by optimizing charge transport and non-radiative carrier recombination. The introduction of Ti3C2Tx MXene into the photoanode improves electron transport and increases the energy-to-current conversion of DSSCs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Wen-Feng Lai, Pei-Ling Chao, Xin-Yu Lin, Yin-Pei Chen, Jih-Hsin Liu, Tz-Feng Lin, Wei-Chou Hsu, Chia-Yi Huang
Summary: In this study, a one-dimensional protrusive TiO2 strip array was fabricated using chemical and physical methods. A porous semiconductor layer was coated on the strip array. The results showed that the DSSC with the TiO2 strip array had a higher energy conversion efficiency, which can be attributed to the large surface area of the protrusive structure and its specific electron transport paths.
Article
Physics, Multidisciplinary
Yu-Chih Chiang, Chia-Rong Lee, Chia-Yi Huang
Summary: A 90-nm-thick TiO2 grid was fabricated using photolithography, sputtering, and lift-off process. A nanoporous film was deposited on the TiO2 grid, which induced a protrusive structure. Experimental results showed that introducing the TiO2 grid into a dye-sensitized solar cell increased its power conversion efficiency by 25%. This improvement can be attributed to the large surface area and directional electron transport channels of the protrusive structure.
Article
Energy & Fuels
I. H. K. Madigasekara, H. C. S. Perera, J. M. K. W. Kumari, G. K. R. Senadeera, M. A. K. L. Dissanayake
Summary: By incorporating Ag/AgBr/TiO2 nanocomposites into the DSC active material, the synthesized material achieved a significant increase in power conversion efficiency. This enhanced efficiency is attributed to the synergistic effects of AgBr and metallic Ag, with AgBr showing high efficiency in generating electron-hole pairs under visible light.
Article
Chemistry, Physical
Pawel Gnida, Pawel Jarka, Pavel Chulkin, Aleksandra Drygala, Marcin Libera, Tomasz Tanski, Ewa Schab-Balcerzak
Summary: The impact of various TiO2 nanostructures on the properties of photoanodes and the photovoltaic parameters of dye-sensitized solar cells was investigated. It was found that the addition of nanotubes to the photoanode resulted in the highest UV-Vis absorption, indicating a higher number of sensitizer molecules anchored to the titanium dioxide. This led to the highest power conversion efficiency in the solar cells containing nanotubes and a mixture of dyes with a co-adsorbent.
Article
Chemistry, Multidisciplinary
Zhenni Wu, Imgon Hwang, Gihoon Cha, Shanshan Qin, Ondrej Tomanec, Zdenek Badura, Stepan Kment, Radek Zboril, Patrik Schmuki
Summary: Anodic TiO2 nanotubes are shown to have excellent properties for harvesting Pt single atoms from highly dilute solutions. The tube walls provide suitable trapping sites for Pt SAs, and a high activity for photocatalytic H-2 generation can be achieved by immersing the nanotubes in a low concentration Pt solution. Overall, these findings demonstrate the potential of anodic TiO2 nanotubes for efficient Pt extraction and recovery, leading to highly active photocatalysts.
Article
Chemistry, Multidisciplinary
Shanshan Qin, Lancang Shui, Benedict Osuagwu, Nikita Denisov, Alexander B. Tesler, Patrik Schmuki
Summary: The study suggests that octahedral nanocubes with abundant {101} facets in anatase TiO2 nanocrystals produce over 4 times more H2 in photocatalytic H2 evolution compared to nanosheets enriched in {001} facets under co-catalyst-free conditions. However, when samples carry Pt co-catalyst on both {001} and {101} facets, the significance of faceting diminishes, indicating that the beneficial role of faceting is relevant only for co-catalyst-free surfaces.
Article
Energy & Fuels
Shanshan Qin, Nikita Denisov, Johannes Will, Jan Kolarik, Erdmann Spiecker, Patrik Schmuki
Summary: Removing non-active Pt SAs on TiO2 by cyanide leaching dramatically increases the co-catalytic activity of remaining Pt SAs, achieving a remarkable turnover frequency of 4.87 x 10(5) h(-1) for H-2 evolution.
Article
Energy & Fuels
Amer Inayat, Alexandra Inayat, Wilhelm Schwieger, Barbora Sokolova, Pavel Lestinsky
Summary: This study investigates the thermo-catalytic pyrolysis of LDPE using HZSM-5 catalysts with different acid site densities. The results show that the catalyst with the highest acid site density produces the highest concentration of aromatics, while the catalyst with the lowest acid site density produces the highest concentration of C-2-C-4 olefins. These findings are important for the chemical recycling of plastic wastes.
Article
Materials Science, Multidisciplinary
Sanghyeon Moon, Devarayapalli Kamakshaiah Charyulu, Jaewon Lee, Taewan Kim, Jiwon Kim, Wonjoo Lee, Kiyoung Lee
Summary: In this study, the electrochemical detection of 2,4,6-trinitrotoluene (2,4,6-TNT) using a rutile TiO2 layer was successfully achieved. The rutile TiO2 layer was fabricated through chemical bath deposition and enhanced by calcination. The results demonstrated that the calcined TiO2 layer exhibited improved crystallinity and active site density, leading to enhanced performance in 2,4,6-TNT detection.
Article
Chemistry, Applied
Gyuwon Seo, Jaeyun Ha, Moonsu Kim, Jihyeon Park, Jaewon Lee, Eunoak Park, Sungyool Bong, Kiyoung Lee, Soon Jong Kwon, Seung-pil Moon, Jinsub Choi, Jaeyoung Lee
Summary: In this study, incremental capacity-differential voltage (IC-DV) is used as a non-invasive diagnostic tool to observe capacity fading in lithium-ion batteries. The results indicate that the initial steep degradation slopes gradually transition to gentle states during cycling at high current rates, revealing the difference between low and high current measurements. The IC-DV curves are used to parameterize the loss of active materials and loss of lithium inventory.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Amara Nasir, Anca Mazare, Xin Zhou, Shanshan Qin, Nikita Denisov, Lukas Zdrazil, Stepan Kment, Radek Zboril, Tariq Yasin, Patrik Schmuki
Summary: This study presents a low-cost, one-step photocatalytic method for synthesizing graphene oxide (GO) using commercial graphite and grey TiO2. GO formation is achieved through UV illumination of a slurry containing well-dispersed grey TiO2 and commercial graphite. The resulting GO-decorated TiO2 acts as a visible-light-active photocatalyst for applications such as pollutant degradation.
Article
Chemistry, Multidisciplinary
Lakshmana Reddy Nagappagari, Santosh S. Patil, Jaewon Lee, Eunoak Park, Yeon-Tae Yu, Kiyoung Lee
Summary: The study demonstrates the effectiveness of two strategies, non-metal doping and heterojunction formation, in adjusting the electronic and molecular structures of g-C3N4 nanosheets. The optimized materials showed improved visible-light response and enhanced electron-hole separation, leading to excellent degradation efficiency.
MATERIALS TODAY CHEMISTRY
(2022)
Editorial Material
Chemistry, Applied
Jaeyoung Lee, Kiyoung Lee
Review
Chemistry, Physical
JeongEun Yoo, Kiyoung Lee
Summary: The self-organized TiO2 nanotubes can be formed by electrochemical anodization, but traditional electrolytes limit their electrical properties and applications. This review introduces a new anodization approach using carbon-free electrolyte in ortho-phosphoric acid, which allows the formation of highly ordered TiO2 nanotube arrays. Further modifications, such as heat-treatment, noble metal deposition, thermal dewetting, and double anodization, are discussed to enhance the optical and electrical properties for various applications.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2023)
Article
Electrochemistry
Sanghyeon Moon, JeongEun Yoo, Wonjoo Lee, Kiyoung Lee
Summary: Zinc oxide nanoparticle electrode catalysts were used to electrochemically detect benzene-derived compounds by controlling the geometric factors. The detection sensitivity difference was measured by adjusting the particle size and oxide-layer thickness. Spin-coating was performed to control the nanoparticle layer thickness. The results showed that zinc oxide nanoparticles with a diameter of 50 nm and a thickness of around 2 μm exhibited the best detection performance. Two additional benzene-derived compounds were also successfully detected. The study highlights the importance of adjusting geometric factors in enhancing the detection sensitivity.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
L. R. Nagappagari, Mohammad Jamir Ahemad, G. -j. Oh, Kiyoung Lee, Yeon-Tae Yu
Summary: The study focuses on improving the efficiency of photocatalytic charge transfer by introducing boron (B) dopant, Ag quantum dots (QDs), and g-C3N4/SnO2 heterojunction nano-composite. These modifications enhance the migration of photoexcited electrons and reduce electron-hole recombination, resulting in improved catalytic activity and performance.
MATERIALS TODAY NANO
(2023)
Article
Multidisciplinary Sciences
Sanghyeon Moon, JeongEun Yoo, Wonjoo Lee, Kiyoung Lee
Summary: In this study, self-organized ZnO nanorod arrays were synthesized on FTO glasses and ZnO nanoparticles using chemical bath deposition (CBD) method to enhance the detection properties of ZnO nanostructural electrodes. The ZnO electrodes on the two different substrates were characterized and their detection performance was electrochemically measured in a 2,4,6-trinitrotoluene (2,4,6-TNT) solution. The width of the ZnO nanorods played a role in determining the differences in current densities between the ZnO electrodes, with F-CBD electrodes showing a approximately 45% higher detection efficiency compared to S-CBD electrodes.
Article
Chemistry, Inorganic & Nuclear
Eunoak Park, Taehyeon Kim, JeongEun Yoo, Kiyoung Lee
Summary: Nanostructuring of metal oxides is an effective approach to enhance photoelectrochemical (PEC) performance. This study investigates the anodization of W metal to fabricate optimal WO3 nanostructures for photoanodes. The anodization process involves fluoride-containing electrolyte and results in the formation of WO3 nanocoral structures. The PEC performance is further improved by coating BiVO4 layers on the WO3 nanostructures, leading to increased photocurrent density and IPCE due to band alignment.
INORGANICA CHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Marco Altomare, Shanshan Qin, Viktoriia A. Saveleva, Zdenek Badura, Ondrej Tomanec, Anca Mazare, Giorgio Zoppellaro, Alberto Vertova, Angelo Taglietti, Alessandro Minguzzi, Paolo Ghigna, Patrik Schmuki
Summary: This article describes a self-assembling and self-activating photocatalytic system formed by illuminating reduced anatase TiO2 nanoparticles in an aqueous Ni2+ solution. The system forms a Ni+/TiO2/Ti3+ photocatalyst that can produce H-2 at a higher rate over time. The formation of defects in the semiconductor under UV illumination plays a crucial role in self-assembly and self-activation, enabling the formation of monovalent nickel (Ni+) surface states that act as electron relays for hydrogen generation from water.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
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)
