Article
Engineering, Environmental
S. Ravikumar, Durai Mani, Mohammad Rizwan Khan, Naushad Ahmad, S. Sylvestre, C. Surya, Balu Krishnakumar, V Pandiyan, Young-Ho Ahn
Summary: The study utilized photodegradation technique with naturally available solar energy to treat toxic pollutants by fabricating Ag-TiO2 @Pd/C nanocomposites. The nanocomposites were effectively tested against Reactive Red 120 and ofloxacin, showing promising degradation performance and antimicrobial activity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Haofei Zhao, Ziwen Zhou, Xuenan Feng, Chao Liu, Hui Wu, Wei Zhou, Hailong Wang
Summary: This study establishes a hydrogen-bonded organic framework that can be used for red light photocatalysis. By introducing ethylamino groups to the core molecule, the material is able to absorb red light at 619 nm and generate singlet oxygen, thereby enhancing the oxidation rate of sulfides.
Article
Environmental Sciences
Haifan Yang, Qian Ping, Yan Zhang
Summary: This study used natural aloe-emodin as a photosensitizer to react with PMMA to prepare composite photocatalysts AE/PMMAs. The photocatalyst showed efficient degradation of ofloxacin and diclofenac sodium under visible light and demonstrated excellent stability, recyclability, and industrial feasibility. The research developed an efficient method of composite photocatalyst and realized the application of a natural photosensitizer in pharmaceutical degradations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yanqing Cong, Jiaxin Yi, Shengna Liang, Feng Zhang, Yi Zhang, Shi-Wen Lv
Summary: In this study, a novel 500NiCo(2)O(4)@CdS-5%Ag photocatalytic composite was successfully fabricated, which showed enhanced visible light absorption and restrained recombination of photogenerated charge carriers. The deposition of Ag further promoted the transfer of charge carriers and accelerated the reaction rate. The composite displayed excellent stability and high removal efficiency in the photocatalytic degradation of organic pollutants, providing inspiration for designing novel photocatalytic systems.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Yong-Por Ong, Li-Ngee Ho, Soon-An Ong, Abdul Haqi Ibrahim, Johar Banjuraizah, Shen-Hui Thor, Sin-Li Lee, Tean-Peng Teoh
Summary: Dual cathode photocatalytic fuel cell (PFC-ACC) and dual photoanodes PFC (PFC-AAC) were established to enhance dye removal and energy recovery efficiencies in single-pair electrode photocatalytic fuel cell (PFC-AC). PFC-AAC exhibited the highest decolorization rate and power output, but the experimental power output was lower than the theoretical power output.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Qin Yang, Yingchun Yang, Yujie Zhang, Longcheng Zhang, Shengjun Sun, Kai Dong, Yongsong Luo, Junyou Wu, Xiaowen Kang, Qian Liu, Mohamed S. Hamdy, Xuping Sun
Summary: The cobalt nanoparticles decorated biomass Juncus derived carbon (Co@JDC) was used to activate peroxymonosulfate (PMS) for efficient removal of ofloxacin (OFX) in water. The Co@JDC/PMS system showed excellent performance with 97% OFX degradation efficiency and 70.4% chemical oxygen demand removal rate achieved within 24 minutes. The system exhibited broad pH tolerance and was unaffected by Cl-, NO3-, and SO(4)2-. SO4-, ·OH, O2-, and O1(2-) were identified as the main active species in the PMS activation process.
Article
Engineering, Environmental
Sandip Mandal, Sangeeta Adhikari, Sangki Choi, Yunho Lee, Do-Heyoung Kim
Summary: A novel composite photocatalyst, MoS2/Bi2MoO6, sensitized with graphene quantum dots (GQDs) was developed for antibiotic remediation and Cr(VI) reduction. The enhanced charge separation and fast electron migration were confirmed. The photocatalyst exhibited high photoefficiency and reaction rate under visible-light irradiation, thanks to the improved light absorption and electron-attracting properties of GQDs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Tianjun Ni, Zhibin Yang, Hui Zhang, Liping Zhou, Wei Guo, Likun Pan, Zhijun Yang, Kaiwen Chang, Chunpo Ge, Dong Liu
Summary: In this study, a Co3O4/SnO2 catalyst was prepared and applied for the degradation of ofloxacin. The catalyst showed high efficiency in degrading ofloxacin and maintained stability over a wide pH range. Furthermore, the study investigated the active species of the catalyst and analyzed the degradation pathway and intermediate toxicity of ofloxacin.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Yu Peng, Xi He, Ningchao Zheng, Ruiting Hu, Weiqing Guo, Zhuofeng Hu
Summary: In this study, visible-light-driven metal-hydrothermal carbon composites were synthesized for the degradation of ibuprofen. The photocatalyst showed high photocatalytic activity and applicability in real water systems for environmental applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Vrinda S. Punnakkal, E. Anila
Summary: In this study, a simple chemical synthesis method was used to prepare polypyrrole/silver/graphene (Ppy/Ag/Gr) ternary nanocomposites with varying concentrations of graphene. The interaction between polypyrrole, silver, and graphene was studied using XRD, FTIR, and UV-Vis spectroscopies. The results showed that the addition of the optimum concentration of graphene into Ppy/Ag enhanced its photocatalytic property. Furthermore, it was confirmed that the enhancement of photocatalysis in the Ppy/Ag/Gr sample was due to the increased surface area.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Environmental
Yu Mu, Saiyu Yang, Yucheng Li, Jianpan Zhang, Mengshao Ma, Jianlin Wang, Zhiyi Yu, Zhaodi Ren, Jing Liu
Summary: The study investigated the efficiency and versatility of Ag/P@BC composites in removing Rhodamine B pollutants, demonstrating high removal rates and stability. The analysis also highlighted the electronic interaction occurring during the adsorption-photocatalysis process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Devagi Kanakaraju, Muhamad Akif Aizuddin Jasni, Andrea Pace, Muhamad Hazim Ya
Summary: The Cu/TiO2/FA composite was optimized for the removal of the model dye pollutant methyl orange under visible light irradiation using response surface methodology and Box-Behnken experimental design. The study considered three independent variables and achieved a 99.91% removal rate under the optimal operating conditions. The results support the hypothesis of a combined and synergic adsorption-photocatalytic degradation process for pollutant removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Maria Antonopoulou, Panagiota Bika, Ilias Papailias, Sevasti-Kiriaki Zervou, Androniki Vrettou, Ioanna Efthimiou, George Mitrikas, Nikolaos Ioannidis, Christos Trapalis, Panagiotis Dallas, Dimitris Vlastos, Anastasia Hiskia
Summary: The photocatalytic performance of exfoliated graphitic carbon nitride (g-C3N4) catalysts was evaluated for the removal of diuron, bisphenol A, and ethyl paraben. The g-C3N4 catalysts showed good photocatalytic activity under both UV and visible light irradiation. They were able to degrade the micropollutants effectively, especially the chemically exfoliated catalyst under UV-A light and the thermally exfoliated catalyst under visible light.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Ke Zhang, Yajing Wei, Hongyang Cao, Yue Xin, Chuanyi Wang
Summary: Tuning the reactive species in peroxymonosulfate (PMS) activation has been extensively studied in catalysis, but the photothermal effect on reactive species alteration has been neglected. In this study, a ZnFe2O4/C photocatalyst with oxygen vacancy was synthesized. The experimental results revealed that the photocatalytic activity of the catalyst without temperature control was higher than that under temperature control, and the primary reactive species were 1O2 and h+ without temperature control, while only 1O2 under temperature control. The possible activation site was speculated through in-situ Raman spectroscopy, XPS spectra, and cycling experiments. This research provides insight into enhancing the degradation rate of pollutants in photocatalysis by utilizing the photothermal effect on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Girish Gupta, Sushil K. Kansal, Ahmad Umar, Sheikh Akbar
Summary: A highly crystalline BiFeO3 catalyst was synthesized through a facile combustion method and effectively used for the degradation of ofloxacin drug under visible light exposure. The optimized conditions resulted in 80% degradation of the drug in 180 minutes and a 64% reduction in TOC. The photocatalytic experiments also demonstrated the good stability of the fabricated catalyst even after five cycles.
Article
Chemistry, Physical
Kasimayan Uma, Shin-Wen Chen, Balu KrishnaKumar, Chellappa Jeyaprabha, Thomas C. -K. Yang, Ja-Hon Lin
Summary: The CdS nanostar decorated SiO2/TiO2-ST spheres showed enhanced photocatalytic activity under visible light irradiation compared to the SiO2-CdS spheres, attributed to providing more active sites for dye adsorption and reducing electron-hole recombination.
Article
Chemistry, Physical
Sukhyun Hong, Minsuk Park, Soonhyung Kwon, Jehyun Oh, Sungmin Bong, Balu Krishnakumar, Sang-Yong Ju
Summary: Focused laser irradiation of graphene/entrapped water/hydrophobic substrate leads to the formation of graphene nanostructures, which offers a viable approach for producing nanostructures from two dimensional materials. The vaporization of entrapped water promotes nanostructures by graphene sliding and bulging actions, demonstrating the potential importance of facile construction of graphene nanostructures for various applications.
Article
Chemistry, Multidisciplinary
Komalavalli Lakshminarayanan, Amutha Parasuraman, Manawwer Alam, Naushad Ahmad, Balu Krishnakumar, Annamalai Raja, Misook Kang
Summary: The prepared HPA/alpha-Fe2O3-loaded Perlite catalyst showed efficient loading and successful synthesis of xanthenes. The protocol offers advantages of easy handling, low cost, and remarkable reusability without loss of catalytic activity over several cycles.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Monisha Sivanandhan, Amutha Parasuraman, Chinnasamy Surya, Komalavalli Lakshminarayanan, Balu Krishnakumar, Durai Mani, Young-Ho Ahn
Summary: An eco-friendly approach using Manihot esculenta for the synthesis of blue fluorescent carbon dots (CDs) with strong blue fluorescence and selective detection capability for Fe3+ ions has been reported. The structural, morphological, and optical properties of the prepared CDs were characterized. The CDs were found to be non-toxic and showed potential for bioimaging and fluorescence detection of heavy metal ions.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
P. J. Lloreda-Jurado, Krishnakumar Balu, Jesus Hernandez-Saz, E. Chicardi, Begona Ferrari, R. Sepulveda
Summary: This study demonstrates the excellent performance of freeze-casted foams, which can withstand multiple redox cycles at different temperatures with no degradation in performance or pore shrinkage. The addition of stearic acid as a dispersant agent/binder enhances the porous structure of the foam and promotes early reduction of the hematite phase. The incorporation of Al2O3 results in the formation of a solid solution and is correlated with the observed positive zeta potential.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
S. Ravikumar, Durai Mani, E. Chicardi, R. Sepulveda, Krishnakumar Balu, V. Pandiyan, Young -Ho Ahn
Summary: Water pollution by toxic dyes is a serious environmental problem. A new green technology using CdS/Ag nanocomposite as a photocatalyst has shown outstanding efficiency in degrading toxic dyes under ultraviolet and direct solar light.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Krishnakumar Balu, E. Chicardi, R. Sepulveda, Mani Durai, Fahmida Ishaque, Deepak Chauhan, Young-Ho Ahn
Summary: Photocatalysis process is an effective method for wastewater treatment and microbial disinfection. Researchers have developed a highly active material under Blue LED that can efficiently degrade dyes and antibiotics. This material also shows good stability and performance in real wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Komalavalli Lakshminarayanan, Monisha Sivanandhan, Subramaniyan Ramasundaram, Tae Hwan Oh, Kinjal J. Shah, Kumaravel Saranraj, Amutha Parasuraman, Krishnakumar Balu
Summary: Niobium pentachloride functionalised perlite was used as a heterogeneous catalyst for the synthesis of pyrans. The immobilisation of NbCl5 over perlite was studied using various techniques. The catalyst showed high efficiency up to five runs and was compared to other reported catalysts. The structures of pyrans were confirmed using spectroscopic techniques.
Editorial Material
Chemistry, Inorganic & Nuclear
Krishnakumar Balu, Subramaniyan Ramasundaram, R. Sepulveda, E. Chicardi, Sakthivel Kumaravel, J. Josphin Mini, Tae Hwan Oh, Balakrishna Avula, Abilio J. F. N. Sobral
Summary: Photocatalysis is an efficient and sustainable oxidation technology for wastewater treatment. This study focuses on the development of visible light active semiconductors by grafting Fe(III) ions onto ZnO. The materials were characterized by various techniques, and Fe modification was found to slightly enhance the degradation ability of ZnO under visible light. The catalyst showed higher absorbance in the visible region and can be reused.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Chemistry, Inorganic & Nuclear
Krishnakumar Balu, Selvam Kaliyamoorthy, Mani Durai, Antonio Aguiar, Margarida C. M. Sobral, I. Muthuvel, Sakthivel Kumaravel, Balakrishna Avula, Abilio J. F. N. Sobral, Young-Ho Ahn
Summary: Materials based on semiconducting oxides are widely used in catalysis, photocatalysis, and other fields. Zinc oxide (ZnO), with its catalytic and optoelectronic capabilities, is utilized in various industries. Porphyrins, biomimetic molecules, can be modified to synthesize derivatives with remarkable optoelectronic properties. The combination of porphyrins and ZnO can lead to the development of hybrid materials with enhanced optical, electronic, and chemical properties. This review aims to present the evolution of ZnO/porphyrin hybrids and future research trends in this field.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Krishnakumar Balu, Balakrishna Avula, Mani Durai, Sakthivel Kumaravel, Ernesto Chicardi, Ranier Sepulveda, Elangovan Erusappan, Imran Hasan, Young-Ho Ahn
Summary: This study focuses on the detailed structural elucidation and formation of mixed composite phases of Bi2O3/bismuth titanates modified with MOF-In2S3/CdIn2S4 materials. It has been found that this composite can be efficiently used for the electrocatalytic H-2 production reaction and the photocatalytic degradation of tetracycline. The characterization of the materials was done using XRD patterns and dark-field high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM).
Article
Materials Science, Multidisciplinary
Sakthivel Kumaravel, Mani Durai, R. Sepulveda, E. Chicardi, Saranraj Kumaravel, Myoung-Jin Kim, Krishnakumar Balu, Imran Hasan, K. Srinivasan, Young-Ho Ahn
Summary: In this study, photocatalytic bare and composite materials were synthesized using different methods, and their photocatalytic efficiencies were evaluated for dye degradation under different light conditions. The WAgGCN composite exhibited significant photocatalytic performance, as well as high chemical stability and excellent recyclability.
Article
Chemistry, Analytical
Sakthivel Kumaravel, Chandramoorthy Chandrasatheesh, Govindasamy Palanisamy, Jintae Lee, Imran Hasan, Saranraj Kumaravel, Balakrishna Avula, Uma Devi Pongiya, Krishnakumar Balu
Summary: In this study, bare g-C3N4 (GCN) and x% Ag/g-C3N4 (x% AgGCN) composite photocatalysts with various weight percentages were successfully fabricated using calcination and simple impregnation methods. The synthesized photocatalysts were analyzed to determine their properties and the 5% AgGCN composite photocatalyst showed the highest photocatalytic activity for MO dye degradation. The interaction of Ag with GCN and the localized surface plasmon resonance effect of Ag contribute to the higher photocatalytic activity of the 5% AgGCN composite catalyst.
Article
Chemistry, Multidisciplinary
Sakthivel Kumaravel, Mani Durai, Selvam Kaliyamoorthy, Saranraj Kumaravel, Chandrasatheesh Chandramoorthy, Balakrishna Avula, Imran Hasan, Myoung-Jin Kim, Krishnakumar Balu, Young-Ho Ahn
Summary: In this study, a catalytic system (3% Ru/Al-SBA-15) is developed for the efficient conversion of furfural into furfuryl alcohol under mild reaction conditions. The catalysts were characterized to understand their physical and chemical properties. The results showed high catalytic conversion and selectivity for the desired products.