Article
Physics, Condensed Matter
Xinwei Zou, Jun Ke, Jianying Hao, Xiaoyan Yan, Yuming Tian
Summary: The amount of surfactant CTAB added to the precursor affects the morphology of ZnO flower-like nanostructures, with nanosheet-assembled nanoflowers showing better photocatalytic performance due to their larger specific area and more OH groups absorbed on the surface. The thickness of the nanosheets in the nanoflowers can be controlled by adjusting the CTAB amount.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Bini B. Nair, M. Junaid Bushiri
Summary: This study demonstrates an easy method for synthesizing nano ZnO structures with a specific morphology using self propagating solution combustion synthesis. The growth of pencil-like ZnO structures was controlled by pH adjustment and the addition of ammonia solution. The resulting ZnO structures showed high degradation efficiency and enhanced photocatalytic and electrochemical properties.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Q. Sun, Q. W. Sun, Q. Y. Zhang, N. Zhou, L. Y. Zhang, Q. Hu
Summary: Chloride solutions were used to modify flower-like Ag-coated ZnO nanorod arrays, forming Ag-nanosphere decorated ZnO nanorod arrays for enhanced SERS study with improved molecule adsorption on Ag surface in the presence of chloride ions.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Fang Tian, Wenpeng Han, Junping Hu, Haifei Wang, Hui Li, Fujiang Geng, Tao Wei, Dong Li
Summary: In this study, flower-like ZnO & NiO@C-coated ZnO nanorod arrays based on carbon cloth were designed. The material exhibited a specific capacity of 1001.5 F g-1 and 92.33% retention after 20,000 cycles in 1 M KOH electrolyte. The abundant oxygen vacancies in the interface model of ZnO and NiO facilitated rapid electron transfer, ion diffusion, and adsorption/desorption. Furthermore, an all-solid symmetric supercapacitor showed an energy density of 27.5 Wh kg-1 and ultrahigh capacitance retention of 102.83% after 10,000 cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Xiong Zhao, Hongqiang Chen, Yaxuan Xiao, Jinhua Zhang, Yinan Qiu, Jinjia Wei, Nanjing Hao
Summary: Optimizing the design of acoustofluidic micromixers is crucial for achieving efficient mixing in practical chemical engineering. This study proposes flower-like sharp-edge acoustic micromixers and investigates the effect of petal numbers, spreading angles, and tip angles on the mixing performance through numerical simulation and experiments. Compared to single sharp-edge devices, the flower-like sharp-edge ones show better mixing efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Tingting Shao, Xinrui Cao, Juntang Dong, Jing Ning, Fuchun Zhang, Xiaoyang Wang, Yuyang Cheng, Huirong Kou, Weibin Zhang
Summary: The flower-shaped nano composite of tin oxide (SnO2) was successfully synthesized using cetyltrimethylammonium bromide (CTAB) as the surfactant. The as-prepared SnO2 sample showed good stability and reusability in degrading methyl orange under visible light, with electrons and holes playing a major role in the degradation process. The reaction mechanism analysis indicated a strong internal relationship between the SnO2 samples and their photocatalytic properties.
Article
Chemistry, Physical
Libin Wang, Linlin Zang, Fengtong Shen, Jingzhen Wang, Zhiyu Yang, Yanhong Zhang, Liguo Sun
Summary: Carbon nitride-based photocatalysts modified with transition metals have shown great potential for efficient CO2 reduction. In this study, Cu modified g-C3N4 nanorod bundles (CCNBs) were successfully prepared and exhibited excellent photocatalytic activity. The introduction of uniformly dispersed Cu improved light absorption, increased active sites, and enhanced the separation and transfer of carriers, resulting in a significantly higher CO yield compared to bulk g-C3N4.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ying Li, Tie Liu, Shuang Feng, Wenshu Yang, Ying Zhu, Yingying Zhao, Zhiyan Liu, Haibin Yang, Wuyou Fu
Summary: By synthesizing flower-like ZnO/Au/CdS nanorods ternary composite photocatalyst, the light-responsive range is extended, the recombination of photogenerated electrons is reduced, and the water splitting performance is ultimately improved. The composite material exhibits significantly enhanced gas evolution rate, showcasing great potential for photocatalytic water splitting applications.
Article
Materials Science, Multidisciplinary
Hong-mei Shao, Xiao-yi Shen, Xue-tian Li, Yong Cui, Wei Zhang, Wen-di Xu, Zhong-cai Shao, Yu-chun Zhai
Summary: Flower-like ZnO microstructures were synthesized successfully using a hydrothermal method with ZnSO4/(NH4)2SO4 as raw materials. The ZnO microstructures exhibited excellent photocatalytic efficiency with a degradation rate of 97.6% for Rhodamine B. The microstructures consisted of hexagonal ZnO rods arranged radiatively.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Chemistry, Physical
Tengfei Bi, Zhenxi Du, Shuoyu Chen, Huan He, Xiaoming Shen, Yuechun Fu
Summary: In this paper, flower-like ZnO photocatalysts assembled with porous nanosheets were prepared by the hydrothermal method and calcination treatment in different atmosphere. The effect of calcination atmosphere on the oxygen vacancies and photocatalytic performance of ZnO were investigated comprehensively. The results show that ZnO photocatalysts calcined in Ar atmosphere exhibit larger specific surface area and higher visible light absorption, and the introduction of more oxygen vacancies improves the separation and transfer efficiencies of photogenerated carriers. Therefore, the photodegration efficiency of methyl orange (MO) by Ar-ZnO is significantly enhanced under both UV and visible light irradiation.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Ma Qiang, Han Xiaomin, Lv Ke, Dong Rui, Hang Zhang, Xin Bo, Zheng Kewen
Summary: This study investigates the preparation and photocatalytic properties of graphene-ZnO nanorod composite with ultrasonic treatment, showing that composite materials prepared with appropriate proportions of raw materials exhibit good photocatalytic performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Meihuan Liu, Jiamiao Jiang, Haixin Tan, Bin Chen, Juanfeng Ou, Hong Wang, Jia Sun, Lu Liu, Fei Wang, Junbin Gao, Chang Liu, Fei Peng, Yun Liu, Yingfeng Tu
Summary: The abuse of antibiotics leads to antibiotic residues in aquatic environments, causing environmental pollution. In this study, a light-driven nanomotor system was developed that efficiently degrades antibiotics. The nanomotors removed a significant amount of antibiotics in a short period of time and displayed stable catalytic activity.
Article
Materials Science, Ceramics
Morteza Golmohammadi, Mojtaba Nabipoor Hassankiadeh, Lifeng Zhang
Summary: In this study, a tin dioxide/zinc oxide nanocomposite (SnO2/ZnO) was successfully synthesized using Acroptilon repens flower extract as a natural reducing and stabilizing agent, demonstrating high efficiency in photocatalytic degradation of eriochrome black T (EBT). The nanocomposite exhibited fine nanoparticles with acceptable particle size distribution and purity. After 3 hours of photocatalytic reaction under sunlight, the degradation efficiency and total organic carbon (TOC) removal percentage of EBT exceeded 98% and 74%, respectively.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
Jitao Li, Qiuxiang Zhu, Guixia Zhang, Jiajia Han, Jinyang Ding, Kuili Liu, Lingling Sun
Summary: Graphene, as a unique two-dimensional material with unusual properties, was used as a substrate for growing flower-like ZnO nanosheets through a facile hydrothermal method. The resulting ZnO nanostructures exhibited improved photocatalytic property, benefiting from the high specific surface area and fast charge transfer from ZnO nanosheets to graphene.
Article
Green & Sustainable Science & Technology
K. Jagajjanani Rao, Varuna Kumaravel, Ishwarya Pownraj, Krituparna Saha, Tarangini Korumilli, Senthil Kumar Sadasivam
Summary: Due to the recalcitrant and toxic nature of textile effluents, there is a high demand for environmentally sustainable technology for dye degradation. This study successfully synthesized zinc oxide nanoparticles using non-edible banana flower perianth as the template and green solvents. The synthesized nanoparticles exhibited excellent photocatalytic efficiency, making them suitable for textile wastewater treatment and water purification applications.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Karanika Sonowal, Lakshi Saikia
Summary: A highly selective and sensitive luminescent sensor for the detection of mercury (II) in water has been reported in this study. The activity for Hg2+ sensing was improved by synthesizing binary MOF composites. The sensor also showed excellent performance in real water samples.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Chemistry, Applied
Subir Biswas, Manash J. Baruah, Gautam Gogoi, Nazimul Hoque, Seonghwan Lee, Young-Bin Park, Lakshi Saikia, Kusum K. Bania
Summary: This article presents an economically viable approach for the synthesis of different alpha, 8-unsaturated aldehydes through catalytic dehydrogenation of ethanol to generate acetaldehyde. The formation of the desired aldehydes is confirmed through modified Hantzsch reaction. Various kinetic studies were performed to understand the effect of different reaction parameters on the formation of alpha, 8-unsaturated aldehydes.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Karanika Sonowal, Neha Nandal, Purashri Basyach, Lisamoni Kalita, Suman L. Jain, Lakshi Saikia
Summary: This study presents a method for selectively photoreducing CO2 to methanol using a composite of graphene-like carbon nitride quantum dots and zirconium-based MOFs under visible light irradiation. The graphene-like carbon nitride quantum dots act as co-catalysts, improving the electronic conductance properties of the composite and elongating the lifetime of photogenerated charge carriers, thus accelerating the generation of catalytically active sites and achieving better selectivity and efficiency in methanol formation.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Multidisciplinary
Purashri Basyach, Lakshi Saikia
Summary: A series of economic and environmental benign g-C3N4 supported magnetic ferrite nanoparticles were synthesized for the catalytic transfer hydrogenation of furfural into furfuryl alcohol. The nanoparticles exhibited high surface properties, uniform dispersion of ferrite, and high adsorption ability for furfural, leading to excellent conversion and selectivity.
Article
Chemistry, Multidisciplinary
Anil Malik, Sakshi Bhatt, Aishwarya Soni, Praveen K. Khatri, Ankur K. Guha, Lakshi Saikia, Suman L. Jain
Summary: This study describes the first photochemical synthesis of linear carbonates from the reaction of CO2 with alcohols using a silver-doped ceria nanocomposite at room temperature under visible light irradiation. DFT calculations suggested electron transfer from silver 4d states to cerium 4f states in the composite for the photoreaction.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Lisamoni Kalita, Karanika Sonowal, Purashri Basyach, Biswajit Saha, Lakshi Saikia
Summary: Various one-dimensional and three-dimensional CdS@CeO2 nanocomposites were synthesized via a solvothermal route. A nanoflower-shaped CdS@CeO2 nanocomposite was selected as a model catalyst and used as a luminescent sensor for Cr(VI) detection in water. Good linear quenching was observed in the range of 0-0.5 μM with a detection limit of 0.04 μM. The catalyst exhibited a quantum yield of 73% and showed high selectivity towards Cr(VI). In addition, it demonstrated efficient photocatalytic activity for the oxidation of benzylamine.
Article
Chemistry, Physical
Gautam Gogoi, Nand K. Gaur, Seonghwan Lee, Young-Bin Park, Lakshi Saikia, Magdi E. A. Zaki, Kusum K. Bania
Summary: The homoepitaxial layered structure of CuO-SnO2 has been found to efficiently convert toluene and p-xylene into value-added compounds through oxidative coupling reactions with amines, resulting in various imines with high yields. The catalyst exhibits microporous channels and expanded lattice planes, allowing for high diffusion rates. The reaction is thermodynamically feasible and involves weak supramolecular forces to stabilize the intermediate state. The CuO-SnO2 catalysts, with moderate to strong basic sites, show good stability and can be easily recycled.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Purashri Basyach, Jyotirmoy Deb, Saddam Sk, Ujjwal Pal, Madhulekha Gogoi, G. Narahari Sastry, Lakshi Saikia
Summary: In this study, a low-cost, environmentally friendly and suitable semiconductor-based heterogeneous photocatalyst was developed for efficient hydrogen evolution through photocatalytic water splitting. The Ni-CuWO4/g-C3N4 nanocrystals demonstrated an enhanced photocatalytic efficacy for H2 generation compared to pure g-C3N4 and Ni-CuWO4. The significant improvement in photocatalytic behavior was attributed to the large surface area, limited band gap energy, and enhanced light harvesting capability of the semiconductor composite. Density functional theory (DFT) calculations further confirmed the potential of the Ni-CuWO4/g-C3N4 composite as a visible-light-driven photocatalyst.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Arpita Devi, Mrinmoy Manash Bharali, Subir Biswas, Tonmoy J. Bora, Jayanta K. Nath, Seonghwan Lee, Young-Bin Park, Lakshi Saikia, Manash J. Baruah, Kusum K. Bania
Summary: A greener and simple catalytic system has been developed for the synthesis of biologically important 3,3'-bisindolyl(methanes) (BIMs) using C1 and C2 alcohols as the carbon source. The reaction takes place under very mild and environmentally friendly conditions without the need for any toxic solvents. The low-cost CuO-peroxymonosulfate (CuO-PMS) system allows for highly efficient reaction and results in high product yield.
Article
Chemistry, Multidisciplinary
Juri Goswami, Purashri Basyach, Siddhartha K. Purkayastha, Ankur K. Guha, Parasa Hazarika, Lakshi Saikia
Summary: In this study, a Z-scheme heterojunction CuWO4/N-CQD/g-C3N4 photocatalyst was constructed using Euphorbia neriifolia leaf derived nitrogen-doped carbon quantum dots (N-CQDs) as an electron mediator. The 0.2-CWO/N-CQD/CN nanocomposite exhibited excellent photocatalytic degradation efficiency for rhodamine B (RhB) under visible light irradiation. A Z-scheme photocatalytic mechanism was suggested based on DFT calculations and band structure analysis. The study also investigated the effects of various parameters on RhB degradation and demonstrated the recyclability of the Z-scheme photocatalyst.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Shikhasmita Das, Jasha Momo H. Anal, Pranjal Kalita, Lakshi Saikia, Samuel Lalthazuala Rokhum
Summary: In this study, a basic CaO nanocatalyst derived from waste snail shells was used for the transesterification of soybean oil to biodiesel. Under optimized reaction conditions, a high biodiesel yield of 96.1% was achieved, with low activation energy and excellent catalytic stability. Life cycle cost analysis showed that the cost of producing biodiesel using this method is very low, indicating its strong potential for commercialization.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Sayanika Saikia, Manoshi Saikia, Salma A. Khanam, Seonghwan Lee, Young-Bin Park, Lakshi Saikia, Gautam Gogoi, Kusum K. Bania
Summary: In this study, cobalt oxide derived from a zeolitic imidazolate framework was modified with sulfur-doped vanadium oxide to form a hybrid material. This material exhibited excellent catalytic performance in the reduction of toxic chromium and photocatalytic degradation of a dye. The presence of sulfur was found to enhance the degradation process.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Physical
Diganta Bhuyan, Sanmilan Jyoti Kalita, Lakshi Saikia
Summary: The surface modification of SBA-15 enhances its adsorption capability for tetrachloroauric anion, leading to the generation of uniform gold nanoparticles on SBA-15. The resulting SBA-15/Au-0 nanohybrid material exhibits excellent catalytic activity for the selective oxidation of cyclohexane and can be recycled multiple times without significant loss in activity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Correction
Chemistry, Physical
Purashri Basyach, Ankur Kanti Guha, Sukanya Borthakur, Lisamoni Kalita, Pubali Chetia, Karanika Sonowal, Lakshi Saikia
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Review
Chemistry, Multidisciplinary
Karanika Sonowal, Lakshi Saikia
Summary: The increase in global energy demand has caused energy crises, but designing efficient chemical models can generate renewable energy fuels to overcome this issue.
