Article
Chemistry, Multidisciplinary
Dhirendra Sahoo, Jyoti Shakya, Nasir Ali, Won Jong Yoo, Bhaskar Kaviraj
Summary: This study investigates the photocatalytic performance of MoS2 nanoflowers synthesized using a hydrothermal method for dye degradation under visible light irradiation. The ultrathin-layered nanoflowers showed faster degradation rates and good stability, indicating their potential as effective catalysts for industrial wastewater treatment.
Article
Engineering, Electrical & Electronic
M. Sabarinathan, Y. Hayakawa, S. Harish
Summary: Layered 2D molybdenum disulfide (MoS2) and Ce-doped MoS2 nanostructures were synthesized by the hydrothermal method. Ce-doped MoS2 exhibited enhanced degradation efficiency against methylene blue (MB) under visible light irradiation. The introduction of Ce ions effectively suppressed the generation of electron-hole pairs, leading to improved degradation efficiency.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Xinying Shi, Meng Zhang, Xiao Wang, Andrey A. Kistanov, Taohai Li, Wei Cao, Marko Huttula
Summary: This study presents a strategy for photocatalytic hydrogen evolution using a Ni-Ag-MoS2 nanocatalyst under visible light. The catalyst, synthesized through an ultrasound-assisted wet method, exhibits stable catalytic activity in both pure and natural water. The enhanced photocatalytic ability is attributed to effective charge migration through the dangling bonds at the Ni-Ag-MoS2 alloy interface and the activation of the MoS2 basal planes, as verified by experimental characterizations and first-principles calculations.
Article
Chemistry, Multidisciplinary
Baoqiu Yu, Ting Meng, Xu Ding, Xiaolin Liu, Hailong Wang, Baotong Chen, Tianyu Zheng, Wen Li, Qingdao Zeng, Jianzhuang Jiang
Summary: Post-modification and sonication method were used to prepare ultrathin HOF-25-Ni organic framework nanosheets with a thickness of 4.4 nm. Experimental data confirmed the successful immobilization of Ni atoms on the crystalline framework.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Electrical & Electronic
Shixiang Zuo, Xiaoman Cao, Peijun Wang, Xiazhang Li, Wenjie Liu, Rong Xu, Chao Yao, Yongsheng Fu, Xiaoheng Liu
Summary: In this study, MoS2/C-mica composites were prepared by introducing C-mica as a carrier, effectively suppressing the curvature and agglomeration of MoS2, thus enhancing the separation effect of photo-generated electron-hole pairs and photocatalytic ability. The resulting product exhibited outstanding visible photocatalytic activity and reusability for tetracycline hydrochloride, with a degradation rate of 90.6% after 60 minutes of irradiation. H(+) and center dot O(2-) radicals played important roles as the main active sites during the photocatalytic degradation process.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Review
Chemistry, Physical
Zuzeng Qin, Jing Wu, Bin Li, Tongming Su, Hongbing Ji
Summary: The review highlights the latest developments in ultrathin layered photocatalysts for CO2 reduction by introducing the mechanism of photocatalytic reduction of CO2 and explaining the factors influencing product selectivity. It also classifies existing catalysts, summarizes prevalent preparation methods, and introduces strategies for improving photocatalyst performance while maintaining its layered structure. Future opportunities and challenges of ultrathin layered photocatalysts for carbon dioxide reduction are also proposed.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Chemistry, Physical
R. Rameshbabu, Gina Pecchi, Eduardo J. Delgado, R. Mangalaraja, M. Sathish
Summary: The study introduces an efficient Fe3+ doped BiOCl photocatalyst with strong absorption in visible light range, enhancing catalytic activity and exhibiting 99% photocatalytic efficiency in RhB degradation. The catalyst demonstrates excellent reusability over four successive cycles with stable degradation performance.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Heba M. El Sharkawy, Amira M. Shawky, Rania Elshypany, Hanaa Selim
Summary: This study investigates the use of visible light to enhance the photocatalytic degradation of organic pollutants in wastewater. Nitrogen-doped titania and molybdenum sulfide nanocomposites (NTM NCs) with varying weight ratios of MoS2 were synthesized and applied in the photodegradation of methylene blue under visible light irradiation. The results showed that the NTM hybrid nanocrystals exhibited higher activity in oxidizing methylene blue compared to pure titania, and the photocatalytic performance increased with the content of MoS2. The prepared NTM NCs photocatalysts were stable during methylene blue photodegradation and showed potential for environmental remediation.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Shuai Wei, Hongxiao Zhong, Hongtao Wang, Yujie Song, Chunman Jia, Masakazu Anpo, Ling Wu
Summary: Two atomic layered BiOCl nanosheets with rich oxygen vacancies were constructed via surface Pd deposition, exhibiting high photocatalytic activity and selectivity. The ultrathin structure of the nanosheets induces the formation of surface oxygen vacancies, resulting in increased visible light absorption. In-situ experiments revealed that the oxygen vacancy sites contribute to the conversion of O-2 molecules from air to the surface. Furthermore, low-coordinated Bi and Pd sites play crucial roles in the formation of active species.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Sarenqiqige Bao, Huan Liu, Haiou Liang, Chunping Li, Jie Bai
Summary: A new carbon-doped ultrathin TiO2 nanosheets were successfully developed in this study, showing superior photocatalytic activity and stability, enhanced adsorption capacity for target pollutants, broadened light absorption range, and accelerated charge transfer.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Xuefei Liu, Yanmei Li, Junzheng Zhang, Jun Lu
Summary: By studying ultrathin Ni/V-layered double hydroxides (Ni/V-LDHs) nanosheets, the photocatalytic reduction of nitrogen to ammonia was successfully achieved, providing potential application prospects in the field of catalysts and creating an environmentally friendly, low-cost, and efficient conversion method for nitrogen reduction to ammonia through solar energy.
Article
Engineering, Electrical & Electronic
Baji Shaik, Raju Atla, Tae Hwan Oh
Summary: In this study, MoS2 and SnWO4 nanocompounds were synthesized using a hydrothermal method, and three different MoS2/SnWO4 nanocomposites were synthesized using MoS2 with varying amounts of SnWO4. X-ray diffraction analysis confirmed the crystal phases of the synthesized nanostructures. Scanning electron microscopy and transmission electron microscopy results showed that SnWO4 nanoplates were deposited onto MoS2 nanosheets, creating a MoS2/SnWO4 heterostructure. The most efficient photocatalytic activity for the degradation of tetracycline under visible light was demonstrated by the MSSW-10 nanocomposite (96.47% degradation in 80 minutes). The rate constant of MSSW-10 was approximately 6.89 and 9.07 times higher than pristine MoS2 and SnWO4, respectively. Additionally, the prepared photocatalyst exhibited good recyclability and high stability. The MoS2/SnWO4 nanocomposites with an appropriate bandgap facilitated efficient electron-hole pair carrier transfer, leading to enhanced photocatalytic activity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Elayaperumal Vijayakumar, Muniyandi Govinda Raj, Moorthy Gnanasekar Narendran, Rajaraman Preetha, Ramasamy Mohankumar, Bernaurdshaw Neppolian, Aruljothy John Bosco
Summary: Photocatalytic degradation is a sustainable technique for reducing environmental hazards caused by the overuse of antibiotics. This study introduces a method to form a particle-embedded-layered structure by incorporating MoS2/g-C3N4 nanocomposite into zirconium oxide nanoparticles. The optimized ZrO2@MoS2/g-C3N4 nanocomposite shows significantly improved photocatalytic activity and a higher rate constant compared to bare ZrO2 nanoparticles.
Article
Nanoscience & Nanotechnology
Mukul Bhatnagar, Matteo Gardella, Maria Caterina Giordano, Debasree Chowdhury, Carlo Mennucci, Andrea Mazzanti, Giuseppe Della Valle, Christian Martella, Pinakapani Tummala, Alessio Lamperti, Alessandro Molle, Francesco Buatier de Mongeot
Summary: This study demonstrates the nano-fabrication of flat optic silica gratings layered with 2D MoS2 over a large area, achieving a strong enhancement of photon absorption. By exciting Guided Mode Anomalies (GMA), resonant and nonresonant light can be strongly confined to the 2D MoS2 layers, resulting in absorption enhancement. These large area 2D MoS2 metastructures have broadband and tunable photon harvesting capabilities, making them ideal for new generation devices in nanophotonics, photo-detection, conversion, and quantum technologies.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Magdeline Tze Leng Lai, Kian Mun Lee, Thomas Chung Kuang Yang, Guan Ting Pan, Chin Wei Lai, Chia-Yun Chen, Mohd Rafie Johan, Joon Ching Juan
Summary: The study successfully synthesized a MoS2 photocatalyst with highly expanded interlayer spaces, which can efficiently degrade organic pollutants in water. The photocatalyst utilizes visible light to generate reactive oxygen species, demonstrating good recyclability.
NANOSCALE ADVANCES
(2021)
Article
Engineering, Environmental
Kosuke Ono, Koji Kimura, Tatsuya Kato, Kouichi Hayashi, Rajapakse M. G. Rajapakse, Masaru Shimomura
Summary: In this study, a simple and economical solvothermal method was used to grow epitaxial anatase TiO2 thin films on a LaAlO3 substrate, and the doping substitution was observed using X-ray fluorescence holography.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
G. John, S. Gopalakrishnan, Abhishek Sharan, M. Navaneethan, Jeganathan Kulandaivel, Nirpendra Singh, P. Justin Jesuraj
Summary: In this research, a heterostructure bifunctional electrocatalyst was prepared using the hydrothermal method, consisting of SnS nano sheets engrafted onto NiCo2O4 nanoneedles suspended on Ni foam. The catalyst showed low overpotentials for oxygen and hydrogen evolution reactions and exhibited good stability in the electrolyte.
Article
Chemistry, Physical
U. Sreevidya, V. Shalini, S. Kavirajan, K. R. Maiyelvaganan, M. Prakash, K. Kamala Bharathi, E. Senthil Kumar, J. Archana, S. Harish, M. Navaneethan
Summary: This study confirms that the incorporation of carbon black can improve the thermoelectric performance of conducting polymers. By mixing carbon black with the polymer, the electrical conductivity and Seebeck coefficient can be increased. The ternary composite with 30 wt% carbon black exhibits the most promising properties, and the enhancement in power factor and figure of merit is attributed to the energy filtering effect and strong non-covalent interactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
A. Selestina, L. Sudha, V. Vijay, N. Karunagaran, M. Navaneethan
Summary: Flexible thermoelectric devices have the potential to generate noiseless, perennial, and widespread electricity from human body temperature energy. SnS, a p-type semiconducting material, is highly regarded for its low thermal conductivity and high Seebeck coefficient. In this study, SnS and SnSSex (x = 0.05, 0.075, and 0.1) samples were synthesized via hydrothermal method and coated on carbon fabric for flexible thermoelectric applications. XRD results confirmed the crystal structure and formation of SnS and Se-doped SnS. HRSEM and HRTEM revealed the distribution of elements and morphology of the materials. Seebeck coefficient and electrical conductivity were measured in the temperature range of 303-373 K. The highest electrical conductivity of 85.5 S/cm was achieved for SnSSe0.075 at 373 K, and the highest power factor of 1.56 mu W/mK(2) was obtained for SnSSe0.1 at 373 K.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
K. Sathiyamoorthy, A. Silambarasan, S. Bharathkumar, J. Archana, M. Navaneethan, S. Harish
Summary: A series of La1-xBixCoO3 perovskite nanostructures were synthesized via sol-gel route and their photocatalytic activity was evaluated using methylene blue (MB) and crystal violet (CV) as model pollutants.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
P. Bharathi, S. Harish, M. Shimomura, M. Krishna Mohan, J. Archana, M. Navaneethan
Summary: Nanostructured SnS2 with enhanced edge sites is prepared and its impact on NO2 gas molecule detection at room temperature (RT) is investigated. The flower-like structure of SnS2 with exposed active sites provides more interaction channels for NO2 gas molecules. The crystal orientation along the (011) plane exhibits more active edge sites, thereby enhancing the sensing performance of the flower-like structure. The fabricated SnS2 gas sensor shows higher selectivity towards NO2 gas molecules. The flower-like structure of SnS2 provides higher stability and a 32.63% increased sensing response compared to the platelet-like structure. This result paves the way for the development of a practical room temperature NO2 gas sensor.
Article
Materials Science, Multidisciplinary
A. M. S. Nurhaziqah, M. K. Ahmad, A. B. Faridah, D. G. Saputri, S. A. Ramli, M. H. Mamat, M. Shimomura
Summary: This research aims to improve the conductivity of a polymer blend with quasi solid state electrolyte by selecting target polymers, PMMA and PVdF, and analyzing their ratio, electrical impedance spectroscopy (EIS) and thermogravimetric analysis (TGA). The optimum conductivity value was found to be 3.44 x 10-6 Scm-1 at ambient temperature with a PMMA:PVdF ratio of 70:30. The analysis also showed that conductivity increases with temperature and has low activation energy (Ea). Additionally, the TGA demonstrated the stability of PBE up to 651 degrees C. Different concentrations of PBE were investigated to assess its stability and conductivity performance.
Article
Nanoscience & Nanotechnology
Kamaljeet Singh, S. Harish, Yasuhiro Hayakawa, Masaru Shimomura
Summary: A facile synthesis of mesoporous TiO2 with a large specific surface area and rich oxygen vacancies was achieved through high-temperature annealing of La-doped TiO2. The integration of a unique mesoporous structure and oxygen vacancies enhances carrier transport and increases surface active sites. Experimental and theoretical calculations were performed to study the effects of lanthanum on mesoporous TiO2. The results show that the formation of anatase TiO2 remains stable until 650℃ for pure TiO2 and 850℃ for the La doped sample, after which a phase transformation from anatase to rutile occurs. Morphological analysis confirms the presence of a mesoporous structure with lanthanum covering the surface of the TiO2 mesospheres.
Article
Engineering, Electrical & Electronic
Thisari Maleesha Gunathilaka, Masaru Shimomura
Summary: In this study, we improve the biostability and tumor targeting ability of two-dimensional black phosphorus nanosheets by functionalizing with PEG and glutathione-stabilized doxorubicin drug-assembled gold nanoparticles.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
V. Shalini, R. K. Roghan, N. S. Santhosh, J. Archana, H. Ikeda, S. Harish, M. Navaneethan
Summary: This study presents a novel approach to develop a wearable thermoelectric device by coating a PANI/G nanocomposite on carbon fabric using a low-cost deposition technique. The fabricated thermoelectric device showed significant improvements in electrical conductivity and Seebeck coefficient, making it suitable for applications in portable and interactive devices. The study also introduces an innovative technique for fabricating fabric-based wearable thermoelectric generators with good thermoelectric properties, offering potential for commercialization.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
S. Gopalakrishnan, Mihir Ranjan Sahoo, Avijeet Ray, Nirpendra Singh, S. Harish, E. Senthil Kumar, M. Navaneethan
Summary: We have developed a heterostructure photocathode consisting of nickel cobalt disulphide layers (NiCo2S4 NS) over a p-Si nanowire (Si NW) surface for solar-assisted water reduction. The optimized Si NW/NiCo2S4 NS heterostructure exhibits enhanced water reduction activity under simulated solar irradiation. The catalytic performance of the heterostructure is attributed to the electrocatalyst properties of NiCo2S4 and efficient charge separation and migration processes at the photocathode/electrolyte interface. Our findings demonstrate the potential of this heterostructure scheme for designing high-performance Si photocathodes for solar water reduction.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Materials Science, Multidisciplinary
Simon Sajan John, Abinaya Rengarajan, Senthil Kumar Eswaran, Archana Jayaram, Navaneethan Mani
Summary: This study synthesizes Se-substituted MoS2 through a hydrothermal method and finds that Se substitution can significantly reduce the thermal conductivity, which is of great significance for the application of thermoelectric devices.
EMERGENT MATERIALS
(2023)
