Article
Chemistry, Inorganic & Nuclear
Kai Huang, Tingting Hu, Yang Wang
Summary: The Novel BiVO4/Zn2SnO4 photocatalyst was prepared by a two-step hydrothermal method, with the optimal mass ratio of Zn2SnO4 to BiVO4 identified as 7wt%. The composite demonstrated significantly improved photocatalytic degradation performance, with h(+) identified as the main active substance, as confirmed through active species trapping experiments and ESR spectroscopy.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Arife Kubra Yontar, Suna Avcioglu, Sinem Cevik
Summary: The use of plant extract modified nanocomposite films is significant for sustainable and eco-friendly materials in environmental remediation. The modification with plant extracts can enhance the hardness and water absorption capacity of nanocomposite films, and significantly improve the photocatalytic activity.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Maryam Rostami Ataabadi, Masoud Jamshidi
Summary: The removal of organic dyes from wastewater using photocatalytic oxidation (PCO) under visible light has gained attention from scientists. In this study, TiO2 nanoparticles were modified with amino-propyltriethoxysilane (APTES) at different concentrations and applied to acrylic latex to prepare photocatalytic nanocomposite paints. The modified nanoparticles showed enhanced photocatalytic degradation of methylene blue under different light sources and improved the tensile strength and toughness of the acrylic film. The modified paints displayed significant improvements in the discoloration of methylene blue stains compared to pure nano TiO2 containing nanocomposites.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Sajjad Haider, Sahar Saad Shar, Imran Shakir, Philips O. Agboola
Summary: In this study, the effect of Cu doping on the photocatalytic activity of Fe2O3 nanoparticles was investigated. The results showed that Cu doping reduced particle aggregation and increased the surface area of nanoparticles. Furthermore, the narrowing bandgap energy of doped hematite contributed to enhanced photocatalytic activity. Among the samples, CF-10 exhibited the highest degradation rate for methylene blue.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Manh Nhuong Chu, Lan T. H. Nguyen, Mai Xuan Truong, Tra Huong Do, Thi Tu Anh Duong, Loan T. T. Nguyen, Mai An Pham, Thi Kim Ngan Tran, Thi Cam Quyen Ngo, Van Huan Pham
Summary: In this study, Ce3+/Ce4+-doped ZrO2/CuO mixed semiconductor oxide was successfully prepared and showed high photocatalytic activity for the degradation of methylene blue (MB). The doping of Ce3+/Ce4+ in the material increased the photocatalytic activity, by reducing the (e(-)/h(+)) recombination rate and improving charge transfer. The materials were characterized using various techniques.
Article
Engineering, Environmental
Lili Chen, Xuemei Ren, Njud S. Alharbi, Changlun Chen
Summary: In this study, Co/Ni-MOFs@BiOI composites were successfully synthesized as a novel light-driven photocatalyst, greatly enhancing visible light absorption and promoting the photocatalytic degradation of cationic methylene blue without the need for any chemical additives. The composites also demonstrated efficient degradation of other dyes under visible light irradiation, with the primary reactive species being superoxide radicals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Peng Chen, Yumeng Liang, Yifeng Xu, Yunliang Zhao, Shaoxian Song
Summary: A novel method using methylene blue as a photosensitizer for the homogeneous degradation of methyl orange under visible-light irradiation was proposed. The degradation mechanism involves Type II pathway and Type I photosensitization, and synchronous removal of methyl orange and methylene blue can be achieved by controlling the initial methylene blue concentration. This cost-effective method shows great potential in eliminating methyl orange and methylene blue from wastewater and offers a new strategy for sustainable water treatment.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Electrical & Electronic
N. S. Moalej, S. Sheibani, M. Mokmeli
Summary: A ternary NiO/CdO/Co3O4 nanocomposite powder was synthesized by sol-gel method, which showed good distribution of Co3O4 particles and proper contact between different phases. The average particle size was 80 nm and the band gap energy was 2.5 eV. The ternary nanocomposite exhibited a maximum degradation efficiency of 78% for methylene blue dye after 180 min. The mechanism of photodegradation involved holes and hydroxyl radicals. The photocatalyst showed reusability in cyclic degradation experiments.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Seong Youl Lee, Hoang Tung Do, Joon Heon Kim
Summary: Plasmonic photocatalysts consisting of TiO2 and Au nanoparticles show enhanced photocatalytic activity for degrading organic dyes under UV and visible light. Mechanism studies reveal that the contribution of hole oxidation and electron reduction pathways for dye degradation differs depending on the wavelength of irradiating light.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Elaiyappillai Elanthamilan, I. Betsy Elizabeth, Sea-Fue Wang, I. Sharmila Lydia
Summary: In this study, M-type magnetic strontium hexaferrite microspheres were prepared and used as a magnetic photocatalyst for the degradation of methylene blue dye. The prepared SrFe12O19 photocatalyst showed a degradation efficiency of 90.2% towards the MB dye. Furthermore, the as-synthesized photocatalyst exhibited superior recycling ability without any phase changes up to three cycles. These findings suggest that SrFe12O19 microspheres could be a potential photocatalyst for the degradation of MB dye in industrial wastewater treatment processes.
Article
Materials Science, Multidisciplinary
Asma M. Alenad, Muhammad Suleman Waheed, Salma Aman, Naseeb Ahmad, Abdul Rauf Khan, Rabia Yasmin Khosa, Mohd Zahid Ansari, Sajjad Ahmad Khan, Hafiz Muhammad Tahir Farid, Taha Abdel Mohaymen Taha
Summary: In this study, pure Fe2O3 and three different Ni-doped Fe2O3 nanoparticles with doping concentrations of 5%, 10%, and 15% were synthesized using an eco-friendly hydrothermal approach. The materials were characterized using various techniques, which confirmed the incorporation of Ni2+ ions into Fe2O3 and the reduction in particle size and aggregation. The Ni doping also resulted in a decrease in bandgap energy and an enhancement in photocatalytic activity. Among the samples, 10% Ni-doped Fe2O3 nanoparticles exhibited the highest methylene blue degradation after 100 minutes.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Zongchen Chen, Jiwei Jiang, Xin Wang, Hui Zhang, Bo Song, Bin Dong
Summary: Inspired by the swarming behavior of bacteria, a light-powered micromotor with self-propulsion and dynamic 'predator-bait' collective behavior was developed based on BiVO4. This micromotor shows great potential in organic pollutant degradation.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Ceramics
William Remlalfaka, Chinnasamy Murugesan, P. N. Anantharamaiah, N. Manikanda Prabu
Summary: Bismuth vanadate and nickel ferrite nanoceramics were synthesized and three composites were prepared, with the 50 wt% BiVO4 + 50 wt% NiFe2O4 composite showing the highest photocatalytic activity. These magnetic composites can achieve 80% dye degradation efficiency under sunlight and can be easily separated using a laboratory magnet.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Min Gu Kim, Ji Eun Lee, Kang Seok Kim, Jeong Min Kang, Jeong Hoon Lee, Kwang Ho Kim, Min Cho, Seung Geol Lee
Summary: The mixed-phase brookite-rutile TiO2 nanoparticles were synthesized using different concentrations of nitric acid, and their photocatalytic activity and photoelectrochemical properties were studied. The results demonstrated that the mixed-phase nanoparticles exhibited excellent performance.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Zeeshan Abid, Khezina Rafiq, Abdul Rauf, Syed Shoaib Ahmad Shah, Rongchao Jin, Ejaz Hussain
Summary: In this work, a Co/Na synergism in Co@Na-BiVO4 microstructures was found to enhance the photocatalytic performance of bismuth vanadate (BiVO4) catalysts. The Co@Na-BiVO4 photocatalysts exhibited higher activity than bare BiVO4, Co-BiVO4, or Na-BiVO4 due to the synergistic role of Co and Na contents, leading to improved charge separation and more efficient electron transportation to the active sites during the photoreaction.
NANOSCALE ADVANCES
(2023)
Article
Environmental Sciences
Kyungki Beak, Moonhee Choi, Dong Hyun Kim, Yiseul Yu, Jayaraman Theerthagiri, Amal M. Al-Mohaimeed, Yangdo Kim, Hyeon Jin Jung, Myong Yong Choi
Summary: The use of silane coupling agents in surface treatment enhanced the dielectric properties of multilayer ceramic capacitors and increased surface gloss. Specifically, the dielectric constant of the TMSPA-treated ceramic powder sintered at 1200 degrees C increased from 881 to 2382, while the dielectric loss decreased from 1.96% to 1.34%. The TMSPA treatment significantly improved the physical and dielectric properties of the multilayer ceramic sheet.
Article
Energy & Fuels
Talshyn Begildayeva, Deviprasath Chinnadurai, Seung Jun Lee, Myong Yong Choi
Summary: Designing efficient and cost-effective electrocatalysts is crucial for creating a sustainable future energy source. In this study, phase-engineered nanospheres were synthesized using a unique liquid-based pulsed laser ablation method, and their multifunctionality was evaluated in hydrogen evolution, oxygen evolution, and methanol oxidation reactions. The synthesized electrocatalysts exhibited low overpotentials and high activity in alkaline media.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Environmental Sciences
Bhuvaneswari Kandasamy, Palanisamy Govindasamy, Pazhanivel Thangavelu, Jayaraman Theerthagiri, Ahreum Min, Myong Yong Choi
Summary: The fabrication of layered triple hydroxides (LTH) doped with different weight percentages of yttrium (Y) was investigated using hydrothermal method, with the 1 wt.% Y-doped LTH showing the highest photocatalytic degradation efficiency for methylene blue dye under visible light irradiation. The optimized LTH exhibited improved photocatalytic performance due to enhanced visible light absorption, reduced transmission, and improved electron-hole separation.
Article
Environmental Sciences
Juhyeon Park, Jiwon Kim, Ahreum Min, Myong Yong Choi
Summary: The study developed a more sensitive Zn@ZnO nonenzymatic electrochemical sensor for the selective determination of hydroquinone, with high sensitivity and low detection limit. The modified Zn@ZnO electrode showed excellent electrochemical sensing performance and has a wide range of potential applications in environmental and biomedical science.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Swetha Erukala, Alexandra J. Feinberg, Cheol Joo Moon, Myong Yong Choi, Andrey F. Vilesov
Summary: Helium droplets are unique hosts for isolating molecular ions for spectroscopic experiments. This study shows that ion-molecule reactions in ethane are less efficient compared to ethylene, leading to the formation of weaker bound dimers and larger clusters.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Jayaraman Theerthagiri, Juhyeon Park, Himadri Tanaya Das, Nihila Rahamathulla, Eduardo S. F. Cardoso, Arun Prasad Murthy, Gilberto Maia, Dai-Viet N. Vo, Myong Yong Choi
Summary: This article reviews the electrocatalytic conversion of nitrate waste into ammonia, focusing on catalysts, reaction conditions, and side reactions. Electrocatalysts with transition metals facilitate electron transfer, while carbon-based materials enable green electro-conversion. The results show high nitrate conversion rates and ammonia selectivity.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Review
Optics
Jayaraman Theerthagiri, K. Karuppasamy, Seung Jun Lee, R. Shwetharani, Hyun-Seok Kim, S. K. Khadheer Pasha, Muthupandian Ashokkumar, Myong Yong Choi
Summary: This review presents the importance of pulsed laser synthesis technology in the production of nanomaterials and its application in the field of photo- and electrocatalysis. By analyzing the mechanisms and optimizing the structures, along with evaluating the catalytic performances in energy and environmental remediation processes, future directions and challenges of pulsed laser techniques are discussed.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
Shreyanka Shankar Naik, Jayaraman Theerthagiri, Fabio Sobral Nogueira, Seung Jun Lee, Ahreum Min, Gyeong-Ah Kim, Gilberto Maia, Leandro M. C. Pinto, Myong Yong Choi
Summary: Cation modulation engineering was used to tune the intrinsic activity and electronic structure of electrocatalysts for water electrolysis. Two-dimensional cobalt-iron-layered double-hydroxide (CoFe-LDH) ultrathin nanosheets were successfully designed, exhibiting abundant electro-chemically active sites and a large surface area. The optimized Co0.5Fe0.5-LDH showed a low overpotential of 270 mV during half-cell oxygen evolution reactions (OERs), while Co0.25Fe0.75-LDH delivered 365 mV at 10 mA/cm2 during hydrogen evolution reactions (HERs). The bifunctional electrocatalyst exhibited outstanding water electrolyzer performance and stability.
Article
Materials Science, Multidisciplinary
Talshyn Begildayeva, Jayaraman Theerthagiri, Seung Jun Lee, Ahreum Min, Gyeong-Ah Kim, Sivakumar Manickam, Myong Yong Choi
Summary: Furfural oxidation was used as a replacement for the sluggish O-2 evolution reaction (OER). Pt-Co3O4 nanospheres were prepared through pulsed laser ablation in liquid (PLAL) for the paired electrocatalysis of hydrogen evolution reaction (HER) and furfural oxidation reaction (FOR). The FOR achieved a high furfural conversion of 44.2% with a major product of 2-furoic acid. The Pt-Co3O4 electrode exhibited a small overpotential of 290 mV at 10 mA cm(-2). As an anode and cathode in an electrolyzer system, the Pt-Co3O4 electrocatalyst required only a small applied cell voltage of about 1.83 V to deliver 10 mA cm(-2), compared with the pure water electrolyzer which required about 1.99 V. This study simultaneously realized the integrated production of energy-saving H-2 fuel at the cathode and 2-furoic acid at the anode.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chae Eun Park, Gyoung Hwa Jeong, Jayaraman Theerthagiri, Hyeyeon Lee, Myong Yong Choi
Summary: In this study, a two-dimensional MXene was reshaped by a pulsed laser irradiation in liquid process, resulting in the formation of a TiO2@TiC core-shell structure with ultrasmall Pt nanoparticles decorated on the surface. These advances significantly enhanced the electrocatalytic hydrogen evolution reaction activity under visible light illumination, demonstrating excellent electrochemical and photoelectrochemical performance.
Article
Environmental Sciences
Adam Gopal Ramu, Asraltbold Saruulbuyan, Jayaraman Theerthagiri, Myong Yong Choi, Dongjin Choi
Summary: Arsenic (As(V))-contaminated water is a global threat to human health and the ecosystem due to its toxicity, carcinogenicity, and high distribution in water streams. A new ferrocene-encapsulated zeolitic imidazolate framework-67 (Fc-ZIF-67) material was synthesized for efficient As(V) removal from aqueous solutions at neutral pH. The Fc-ZIF-67 adsorbent showed superior As(V) adsorption performance with an adsorption capacity of 63.29 mg/g at neutral pH. The Langmuir and Freundlich isotherm models were used to analyze the adsorption behavior.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
K. Karuppasamy, Jayaraman Theerthagiri, Aravindhan Selvaraj, Dhanasekaran Vikraman, Hemalatha Parangusan, R. Mythili, Myong Yong Choi, Hyun-Seok Kim
Summary: In recent years, eco-friendly renewable energy sources have been recommended as alternatives to fossil fuels in order to reduce environmental pollution and meet future energy demands. Lignocellulosic biomass, as the largest source of renewable energy in the world, has attracted significant interest for the production of biofuels and value-added chemicals. Among the various furan derivatives that can be obtained from biomass, 5-hydroxymethylfurfural (HMF) and 2,5-dimethylfuran (DMF) are considered the most useful molecules for the production of fuels and fine chemicals. This review discusses the transformation of HMF into DMF using different catalysts and provides insights into the reaction conditions and the influence of the catalyst support.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Yujeong Jeong, Shreyanka Shankar Naik, Yiseul Yu, Jayaraman Theerthagiri, Seung Jun Lee, Pau Loke Show, Hyun Chul Choi, Myong Yong Choi
Summary: Optimizing the structure and components is an effective strategy for increasing electrocatalytic energy-saving H-2 fuel production. By alloying Cu with Pd through pulsed laser ablation in methanol, the performance of cathodic HER and anodic HzOR can be selectively enhanced. The Cu1Pd3/C ratio demonstrates outstanding HER and HzOR performance, and the constructed HzOR-assisted electrolyzer shows exceptional endurance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Chae Eun Park, Raja Arumugam Senthil, Gyoung Hwa Jeong, Myong Yong Choi
Summary: In this study, HEO nanostructures were synthesized on Ti3C2Tx MXene via rapid microwave heating and subsequent calcination at a low temperature. The influence of HEO loading on Ti3C2Tx MXene and its performance in OER were investigated. The results showed that the HEO/Ti3C2Tx-0.5 hybrid exhibited outstanding OER ability and photoelectrochemical performance, surpassing that of a commercial IrO2 catalyst.
Article
Nanoscience & Nanotechnology
Natalie N. Tarasenka, Vladislav G. Kornev, Alena A. Nevar, Seung Jun Lee, Hanna M. Maltanava, Sergey K. Poznyak, Myong Yong Choi, Nikolai V. Tarasenko
Summary: The study focuses on the formation of nonspherical anisotropic nanoparticles using pulsed laser ablation in liquids with an applied voltage. Shape-controlled preparation of nonspherical ZnO/C composite nanomaterials was achieved by controlling the applied voltage and polarity. A time-resolved imaging technique was used to investigate the formation mechanism of nanoflower structures. Sponge-like composites with a developed surface were obtained and showed promising capacitance and charge storage behavior in preliminary electrochemical tests.
ACS APPLIED NANO MATERIALS
(2023)
