Article
Environmental Sciences
Mohammad Hossein Sayadi, Shahin Homaeigohar, Ayoob Rezaei, Hossein Shekari
Summary: A TiO2/graphene (G) heterostructure doped with Bi and SnO2 nanoparticles was synthesized and used for photocatalytic degradation of pentachlorophenol (PCP) under visible light irradiation. The nanocomposite showed promising photodegradation efficiency due to the generation of active radicals. Optimizing parameters such as pH, catalyst dosage, and PCP concentration improved the photocatalytic activity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Pei Wang, Yong-Jun Yuan, Qing-Yu Liu, Quan Cheng, Zhi-Kai Shen, Zhen-Tao Yu, Zhigang Zou
Summary: This study constructed 2D-2D MoS2/TiO2 photocatalysts, which significantly improved the efficiency of photocatalytic lignocellulose-to-H-2 conversion and demonstrated high H-2 generation rates. By optimizing the interface structures of the photocatalyst, more efficient solar-driven lignocellulose-to-H-2 conversion can be achieved.
Article
Polymer Science
Lamine Aoudjit, Hugo Salazar, Djamila Zioui, Aicha Sebti, Pedro Manuel Martins, Senentxu Lanceros-Mendez
Summary: This study synthesized round-shaped Ag@TiO2 nanocomposites with a diameter of approximately 21 nm and a bandgap energy of 2.8 eV, which demonstrated good photocatalytic activity against metronidazole (MNZ) under solar radiation. The application of an adaptive neuro-fuzzy inference system (ANFIS) successfully predicted the effect of various parameters on the photocatalytic performance of the composite membrane, showing that the 10% Ag@TiO2/PVDF-HFP composite membrane achieved 100% removal efficiency for MNZ after 5 hours of solar radiation exposure.
Article
Chemistry, Physical
Dewen Zheng, Heng Zhao, Shanyu Wang, Jinguang Hu, Zhangxin Chen
Summary: Photocatalytic water splitting for hydrogen production is a promising strategy to tackle energy crisis and environmental pollution. Utilizing p-n heterojunction in photocatalyst design can enhance hydrogen evolution activities by improving charge separation efficiency. The preparation methods for NiO-TiO2 composites have a significant impact on the efficiency of photocatalytic hydrogen production.
Article
Materials Science, Ceramics
V. Navakoteswara Rao, P. Ravi, M. Sathish, K. K. Cheralathan, B. Neppolian, M. Mamatha Kumari, M. V. Shankar
Summary: A hierarchical structure composed of Pt@Co3O4/TiO2 (CTP) ternary nanocomposite was synthesized and demonstrated for its enhanced and durable production of hydrogen from glycerol under simulated solar light irradiation. The optimized composition showed a hydrogen production rate of 19.2 mmol h(-1) g(cat)(-1). The heterojunction formed in the ternary system remarkably enhanced the visible light absorption properties and charge separation in CTP, leading to improved and durable photocatalytic efficiency towards hydrogen production.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Na Li, Wenjun Yan, Yu Niu, Shijie Qu, Pingping Zuo, Hongcun Bai, Ning Zhao
Summary: The study presents a Cu-Cu2O@RGO nanocomposite formed in solution under simulated sunlight irradiation, offering advantages such as retained semiconductor characteristics, efficient electron transfer pathways, and chemical protection. These characteristics provide potential applications for enhancing photoelectrochemical and photocatalytic H-2 evolution.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Ping Wang, Qingqing Yang, Chen Xu, Bo Wang, Huan Wang, Jidong Zhang, Yongdong Jin
Summary: This study explores the use of magic-sized CdSe nanoclusters as light absorbers for hydrogen photogeneration. Compared to conventional semiconductor quantum dots, these nanoclusters exhibit superior catalytic performance, attributed to their longer exciton lifetime and fast electron transfer to cocatalyst. Additionally, the issue of instability during the reaction can be significantly inhibited by anchoring Zn2+ onto the nanocluster surface.
Article
Chemistry, Physical
Ying Wang, Jiaru Peng, Yangfan Xu, Ruiyang Zhao, Jishu Han, Lei Wang
Summary: This study fabricated CdSe/CuInS2 microflowers with high photocatalytic hydrogen production activity through the construction of p-n heterostructure, demonstrating their broad application prospects in water splitting for hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Biochemistry & Molecular Biology
Sebastian Otieno, Anabel E. Lanterna, John Mack, Solomon Derese, Edith K. Amuhaya, Tebello Nyokong, Juan C. Scaiano
Summary: This study aims to extend the absorption spectrum of semiconductor materials into the visible region, developing P-TiO2 systems for efficient photocatalytic hydrogen generation.
Article
Chemistry, Multidisciplinary
Chunfeng Yuan, Yongli Shen, Chunyu Zhu, Pei Zhu, Fan Yang, Jinghai Liu, Changhua An
Summary: This study presents a facile strategy to improve the photocatalytic performance by synthesizing black TiO2 nanosheets and anchoring Ru single atoms on its surface. The introduction of Ru single atoms creates impurity levels, facilitating the separation and transportation of photoelectrons, and significantly enhances the efficiency of hydrogen production.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Husnu Arda Yurtsever, Ali Emrah Cetin
Summary: The study demonstrated that ZIF-8/Cu-TiO2 nanocomposites can be prepared at low ZIF-8 levels, leading to the formation of heterojunctions on TiO2 surfaces and enhancing photocatalytic activity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Environmental Sciences
Yadala Venkata Divyasri, Nagappagari Lakshmana Reddy, Kiyoung Lee, M. Sakar, Vempuluru Navakoteswara Rao, Vemula Venkatramu, Muthukonda Venkatakrishnan Shankar, Nallagondu Chinna Gangi Reddy
Summary: This study optimized nitrogen doping in TiO2 nanotubes to achieve enhanced photocatalytic efficiency for dye degradation and hydrogen production under solar light exposure. By controlling the nitrogen doping concentration, the N-doped TiO2 nanotubes showed efficient photocatalytic performance and stable recyclability.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Physical
S. Y. Toledo-Camacho, A. Rey, M. I. Maldonado, J. Llorca, S. Contreras, F. Medina
Summary: This paper focuses on the photocatalytic hydrogen production on Pd/TiO2(-WO3) catalysts from water-methanol and water-glycerol mixtures. The method of Pd photodeposition plays a key role in increasing hydrogen evolution. Experimental results from lab scale and pilot-scale solar CPC show the competitiveness of these catalysts in terms of hydrogen production efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Induja M. Sundaram, Sivaprakash Kalimuthu, Gomathi P. Priya, Karthikeyan Sekar, Saravanan Rajendran
Summary: A novel hierarchical TiO2 spheroids decorated with g-C3N4 nanosheets has been synthesized for efficient solar-driven hydrogen evolution and water depollution photocatalyst. The as-prepared nanocomposite exhibits superior photocatalytic performance compared to pure TiO2 and g-C3N4, and provides new insights for constructing efficient catalysts for solar energy conversion, solar fuels, and other environmental applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Yue Han, Changdi Wang, Ruiyang Zhao, Jishu Han, Lei Wang
Summary: In order to address environmental pollution and energy crisis, photocatalytic water splitting to produce hydrogen as an alternative fuel has gained widespread attention. This study focuses on the construction of a heterojunction photocatalyst, where Ni-doped CdSe was modified on the surface of hollow ZnSnO3 double-shell nanocubes. The resulting Cd0.9Ni0.1Se/ZnSnO3 exhibited high photocatalytic activity under visible light irradiation, with a hydrogen production rate of 6458.0 μmol/g/h.
Article
Environmental Sciences
U. Bharagav, N. Ramesh Reddy, V. Nava Koteswara Rao, P. Ravi, M. Sathish, Dinesh Rangappa, K. Prathap, Ch Shilpa Chakra, M. Shankar, Lise Appels, Tejraj M. Aminabhavi, Raghava Reddy Kakarla, M. Mamatha Kumari
Summary: Ternary nanohybrids based on mesoporous graphitic carbon nitride (g-C3N4) were synthesized and optimized to develop a stable and efficient hydrogen production system. Through the optimization of different stages, the activity of the binary composite was enhanced significantly. The ternary nanohybrid showed remarkable hydrogen production and dye degradation activities.
Article
Nanoscience & Nanotechnology
Priyanka Choudhary, Kamlesh Kumari, Devendra Sharma, Sahil Kumar, Venkata Krishnan
Summary: A metal-free methodology using boron nitride (BN) nano-sheets functionalized with hydroxyl groups (BN-OH) has been developed for the synthesis of phenols from arylboronic acids. The hydroxyl groups on the BN nanosheets serve as active sites for the hydroxylation reaction. The optimized reaction parameters and the use of water as solvent contribute to high catalytic efficiency and eliminate the need for toxic solvents.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
U. Bharagav, N. Ramesh Reddy, V. Navakoteswara Rao, P. Ravi, M. Sathish, M. V. Shankar, Tejraj M. Aminabhavi, Raghava Reddy Kakarla, M. Mamatha Kumari
Summary: Harvesting solar energy for hydrogen production through a photocatalytic approach is a clean and sustainable solution to the energy crisis and pollution. In this study, a noble metal free composite of Bi2S3-WO3 integrated with carbon nanotubes (CNTs) was designed and developed to overcome the photo-corrosion of Bi2S3 and enhance charge carrier recombination. The optimized composite (CWB-4) showed significantly higher hydrogen production rates than the pristine Bi2S3 photocatalyst, attributed to the effective utilization of charge carriers and suppressed photo-corrosion through the Z-scheme interface.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Paper & Wood
Prathiba Meganathan, Lakshmi Manokari Selvaraj, Sounder Subbaiah, Venkatesh Subramanian, Sudhagar Pitchaimuthu, Nagarajan Srinivasan
Summary: The study successfully prepared a composite coated cotton fabric with carbon nitride and conducting polypyrrole, and demonstrated its superior performance in photocatalytic stain removal and self-cleaning. The CNPPY composite coated cotton fabric not only exhibited high photocatalytic degradation efficiency, but also showed excellent antibacterial properties, with lower water consumption during the washing process.
Article
Engineering, Environmental
Priyanka Choudhary, Shivangi Singh Chauhan, Devendra Sharma, Sahil Kumar, Venkata Krishnan
Summary: This work reports a sustainable method for the synthesis of aromatic nitriles using metal-free heterogenous catalysts. A sulfonated boron nitride (S-BN) catalyst was used to achieve high yields of nitriles from aromatic alcohols and aqueous ammonia under mild conditions. The catalyst was prepared by exfoliation and sulfonation of low cost hexagonal boron nitride, resulting in the generation of active centers. The reaction showed excellent yields and high green metric parameters.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Vempuluru Navakoteswara Rao, Hyunguk Kwon, Yonghee Lee, Parnapalli Ravi, Chi Won Ahn, Kyeounghak Kim, Jun-Mo Yang
Summary: To ensure continuous and stable production of hydrogen, hierarchical nano-structures incorporating an ultrathin TiO2 shell material are developed within a few-layer Mxene nanosheet. Comparative analysis of CdS cores covered with three different shell transition metal oxides supported by Mxene showed that TiO2 displayed the highest photocatalytic activity under visible light irradiation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Vempuluru Navakoteswara Rao, Pasupuleti Kedhareswara Sairam, Moon-Deock Kim, Mashallah Rezakazemi, Tejraj M. Aminabhavi, Chi Won Ahn, Jun-Mo Yang
Summary: In order to reduce environmental pollution and carbon-based gas emissions, photocatalytic hydrogen production and sensing applications at ambient temperature are crucial. This research focuses on developing new 0D/1D materials based on TiO2 nanoparticles grown onto CdS hetersturctured nanorods through a two-stage synthesis process. The optimized nanohybrid showed excellent stability and a high photocatalytic hydrogen production rate. Furthermore, the nanomaterial exhibited superior gas sensing performance for NO2 detection at room temperature, with increased sensitivity when activated by UV light. Overall, the 1D/0D CdS@TiO2 material proved to be efficient for both hydrogen production and gas detection.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
Tripti Chhabra, Balendu Bisht, Sahil Kumar, Venkata Krishnan
Summary: The catalyst conversion of lignocellulose derived products to value added chemicals is important in solving energy crisis. In this study, a phosphomolybdic acid (PMA) supported on boron-nitride (BN) nanosheets catalyst was prepared and optimized for the conversion of fructose to 5-hydroxymethylfurfural (5-HMF). It was found that the addition of sulfuric acid (H2SO4) enhanced the catalytic activity and formation of levulinic acid (LA), in addition to 5-HMF.
Article
Engineering, Environmental
Katherine Rebecca Davies, Michael G. Allan, Sanjay Nagarajan, Rachel Townsend, Tom Dunlop, James D. McGettrick, Vijay Shankar Asokan, Sengeni Ananthraj, Trystan Watson, A. Ruth Godfrey, James R. Durrant, M. Mercedes Maroto-Valer, Moritz F. Kuehnel, Sudhagar Pitchaimuthu
Summary: Photoelectrocatalysis is a favorable technique that utilizes natural sunlight to degrade pollutants and generate hydrogen. In this study, a mesoporous nanoscale WO3/BiVO4 heterostructure photoanode was used to effectively degrade ibuprofen in wastewater and simultaneously produce hydrogen. The results showed a near complete degradation of ibuprofen (>96%) with no hazardous intermediates detected, and the production of 114 μmol/cm2 of H2 after 145 minutes. The study also investigated intermediate product analysis, the role of in situ oxidants, the mechanistic pathway, and material characteristics of the photoanode. It provided the first experimental evidence of in situ generated H2O2 contributing to the degradation of ibuprofen.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Ashish Kumar, Manisha Sharma, Sajjan Sheoran, Shilpi Jaiswal, Abhijit Patra, Saswata Bhattacharya, Venkata Krishnan
Summary: This study successfully synthesized nitrogen-doped SrTiO3 nanocubes with a one-step solvothermal method, and achieved reliable photocatalytic NH3 generation by eliminating surface nitrogenous impurities through a rigorous cleaning procedure. The contribution of surface impurities to NH3 formation was deduced, and it was found that defect-containing SrTiO3 materials exhibited the highest NH3 formation activity under natural sunlight in pure water, attributed to the tuned defect sites, enhanced surface area, and efficient charge separation. Therefore, this study provides a simple and affordable method for the synthesis of nitrogen-doped catalysts and expands the application of perovskite oxide materials for the fabrication of efficient photocatalysts for sustainable NH3 production.
Review
Chemistry, Multidisciplinary
Ajay Kumar, Priyanka Choudhary, Tripti Chhabra, Harpreet Kaur, Ashish Kumar, Mohammad Qamar, Venkata Krishnan
Summary: The rational design and development of highly efficient and stable photocatalysts is a major focus in the field of photocatalysis. This review article provides a critical comprehensive overview of the development of plasmon mediated GCN based photocatalysts and summarizes the recent progress in the field of energy conversion, environmental remediation, and organic transformations. It also discusses the challenges associated with stability, low light absorption, and fast recombination of charge carriers, and introduces the use of GCN coupled with plasmonic materials to enhance photocatalytic activity.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Nanoscience & Nanotechnology
Manisha Sharma, Ashish Kumar, Deepika Gill, Shilpi Jaiswal, Abhijit Patra, Saswata Bhattacharya, Venkata Krishnan
Summary: In this study, W-doped Bi2MoO6 nanosheets were synthesized and demonstrated their potential as efficient photocatalysts for the simultaneous production of NH3 and NO3- ions under visible light irradiation. The optimal molar ratio of doped tungsten showed the best photocatalytic NH3 production without using any sacrificial agents. The enhanced photocatalytic activity of the synthesized photocatalysts could be attributed to oxygen vacancy defects caused by Mo substitution by a more electronegative W atom.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Michael Walsh, Jeannie Tan, Sanjay Nagarajan, Kenneth Macgregor, John Andresen, M. Mercedes Maroto-Valer, Sudhagar Pitchaimuthu
Summary: This study presents a novel approach for electrochemical hydrogen generation using distillery industry wastewater. The use of solvothermally derived Ni2Se3 nanoparticles as the anode catalyst material enhances the oxidation of acetic acid in the wastewater, resulting in increased current density and hydrogen production capability compared to conventional freshwater electrolyte systems.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Energy & Fuels
Hushan Chand, Ajay Kumar, Subhadip Goswami, Venkata Krishnan
Summary: This study investigates the catalytic activity of graphitic carbon nitride (GCN) derived from different precursors in the CO2 conversion reaction. The results show that GCN derived from urea demonstrates the best catalytic activity and product yield. Exfoliated GCN samples exhibit a moderate decrease in catalytic activity, possibly due to a decrease in terminal amino groups.
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.
