Article
Chemistry, Physical
Keng Chen, Huazhang Guo, Jiye Zhang, Liang Wang, Minghong Wu
Summary: This work focuses on the development of a highly efficient photocatalyst for clean hydrogen production. The metal-free 2D/2D boron/g-C3N4 nanosheet heterojunction (B-CN) was designed and synthesized, which showed a hydrogen generation rate 35 times higher than g-C3N4. The tight heterojunction architecture allows for enhanced light absorption, increased carrier concentration, and efficient charge transfer, leading to improved photocatalytic activity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Bicheng Zhu, Haiyan Tan, Jiajie Fan, Bei Cheng, Jiaguo Yu, Wingkei Ho
Summary: Tuning the strength of interfacial built-in electric field (IEF) in 2D/2D graphitic carbon nitride (g-C3N4)/MS2 (M = Sn, Zr) S-scheme heterojunctions through nonmetal doping significantly enhances photocatalytic activity. Oxygen and sulfur doping leads to increased interfacial electron transfer, resulting in better hydrogen production activity in photocatalysts.
JOURNAL OF MATERIOMICS
(2021)
Review
Chemistry, Physical
Bicheng Zhu, Bei Cheng, Jiajie Fan, Wingkei Ho, Jiaguo Yu
Summary: Using semiconductor photocatalysis to convert solar energy into chemical energy is a viable strategy for addressing the energy and environmental crisis. Graphitic carbon nitride (g-C3N4) is a popular 2D photocatalyst with visible light response, low cost, and high stability, but single g-C3N4 photocatalyst has poor performance due to fast recombination of photogenerated electrons and holes. Hybridizing g-C3N4 with other 2D materials to construct 2D/2D heterojunction photocatalysts improves this limitation by offering large contact area and plentiful channels for the migration and separation of photogenerated charge carriers, inheriting the strengths of 2D structure such as high specific surface area and abundant active sites.
Article
Engineering, Environmental
Hongji Li, Dandan Wang, Chun Miao, Fengwu Xia, Yubo Wang, Yutong Wang, Chunbo Liu, Guangbo Che
Summary: In this study, a photocatalyst with a closely stacked structure was prepared by fastening BiOI nanoplates on g-C3N4 nanosheets, which improved the transfer and separation efficiency of photo-generated electron-hole pairs and achieved high degradation of pollutants and CO2 reduction under visible light exposure. The photocatalyst exhibited high efficiency in degrading pollutants and producing CO, and showed excellent stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Xi Yang, Zhen Tian, Yufang Chen, Hao Huang, Jie Hu, Bin Wen
Summary: A series of cobalt-doped g-C3N4 nanosheet photocatalysts with different cobalt doping content were prepared, among which the 1 wt% sample showed excellent photocatalytic activity and stability, with higher H2 evolution and MB degradation performance compared to bulk g-C3N4.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chao Liu, Zitong Han, Yue Feng, Hailu Dai, Yefan Zhao, Ni Han, Qinfang Zhang, Zhigang Zou
Summary: The construction of ultrathin Z-scheme two-dimensional (2D)/2D N-doped HTiNbO5 nanosheets/gC(3)N(4) heterojunction composites through a two-step exfoliation-restacking process has shown enhanced photocatalytic performance for organic dye degradation and hydrogen generation under visible light irradiation. This is achieved by effectively spatial separation of charge carriers in a 2D/2D heterojunction structure, leading to improved catalytic activities.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Jiapeng Gao, Zipeng Xing, Meijie Liu, Yichao Wang, Na Zhang, Zhenzi Li, Peng Chen, Wei Zhou
Summary: Na-doped g-C3N4/NiO 2D/2D laminated p-n heterojunction nanosheets were fabricated, which showed high photocatalytic activity and hydrogen production rate due to the high specific surface area, surface reactivity, and enhanced charge separation and transport.
DALTON TRANSACTIONS
(2022)
Article
Engineering, Chemical
Elvana Cako, Szymon Dudziak, Pawel Gluchowski, Grzegorz Trykowski, Marcin Pisarek, Agnieszka Fiszka Borzyszkowska, Karol Sikora, Anna Zielinska-Jurek
Summary: Novel phosphorus and sulfur co-doped graphitic carbon nitride incorporated in 2D TiO2 structure were successfully fabricated and applied for solar-driven degradation of pharmaceutical pollutants. The hybrid photocatalysts were characterized and showed improved photocatalytic activity towards the degradation of carbamazepine and acetaminophen. The results suggested that the (P, S)-doped g-C3N4/2D TiO2 heterostructure is a Z-scheme heterojunction, effectively separating photogenerated charge carriers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Z. Liang, Y. Xue, X. Wang, X. Zhang, J. Tian
Summary: By incorporating oxygen-doped MoS2 as a cocatalyst, the photocatalytic hydrogen evolution of p-g-C3N4 nanosheets can be tremendously promoted, showing highly efficient performance and outstanding stability.
MATERIALS TODAY NANO
(2022)
Article
Chemistry, Physical
Huijie Wang, Qi Liu, Mengyang Xu, Chenlong Yan, Xianghai Song, Xin Liu, Huiqin Wang, Weiqiang Zhou, Pengwei Huo
Summary: This study successfully improved the photocatalytic activity and near-infrared performance of dual-plasma enhanced 2D/2D/2D photocatalysts, leading to high selectivity and yield in the reduction of CO2 to produce CO.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
T. Montalvo-Herrera, J. C. Vallejo-Marquez, D. B. Hernandez-Uresti, D. Sanchez-Martinez
Summary: g-C3N4 powders were double exfoliated using microwave technique and heat treatment, resulting in increased surface area and improved photocatalytic activity. Photo-holes were found to be responsible for the degradation of acetaminophen, while hydrogen peroxide played a role in the photocatalytic process of ibuprofen.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
A. Shiny Golda, Ajith P. Varghese, Navid Rabiee, Bernaurdshaw Neppolian, Sandeep Kumar Lakhera
Summary: In this study, a new 2D-2D nanosheet photocatalyst was developed with NiCuInS2: In2S3/g-C3N4. The heterojunction exhibited significantly improved hydrogen production due to the synergistic effects of Ni-Cu-In trimetallic active sites and the dual S-scheme heterojunction, enabling efficient charge separation and transfer.
Article
Chemistry, Physical
Zhen Li, Fei Huang, Yifeng Xu, Aihua Yan, Haiming Dong, Sen Luo, Miao Hu
Summary: Constructing 2D/2D heterojunctions with intimate interfacial contact is crucial for achieving high photocatalytic efficiency for hydrogen evolution. In this study, Nb3O7F/g-C3N4 heterojunction photocatalysts were successfully prepared and demonstrated remarkable photocatalytic activity for hydrogen production. The enhanced specific surface area, improved photogenerated electron/hole separation efficiency, and inhibited carrier recombination contribute to the high performance of the heterojunction photocatalysts.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Ahmad Beyhaqi, Seyed Mohammad Taghi Azimi, Zhihong Chen, Chun Hu, Qingyi Zeng
Summary: Exfoliated and plicated g-C3N4 nanosheets (CNsF) were prepared by thermal-chemical exfoliation and acidic etching, which disrupted weak van der Waals forces between layers to form monolayer or few-layer nanosheets, while creating disordered defects on the surface.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Hui Bian, Deng Li, Shengyao Wang, Junqing Yan, Shengzhong (Frank) Liu
Summary: Recently, halide perovskites, especially all-inorganic CsPbBr3, have gained increasing attention in the field of photocatalysis due to their superior optoelectronic properties and thermal stability. However, there is limited research on their application in thermocatalysis and photo-thermocatalysis. In this study, a core-shell heterojunction composed of CsPbBr3 nanoparticles encapsulated with a 2D C3N4 (m-CN) layer was rationally designed. The results showed that m-CN@CsPbBr3 significantly improved CO2 capture and charge separation, and effectively drove the thermocatalytic reduction of CO2. When coupled with light, the activity for CO2-to-CO reduction was further enhanced, surpassing that of pure photocatalysis and thermocatalysis. This work expands the application of halide perovskites and provides guidance for utilizing perovskite-based catalysts in photo-assisted thermocatalytic CO2 reduction.
Article
Chemistry, Physical
Babu Bathula, Ravindranadh Koutavarapu, Jaesool Shim, Kisoo Yoo
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Energy & Fuels
Thirumala Rao Gurugubelli, Bathula Babu, Kisoo Yoo
Summary: Nanomaterials with collective optical and magnetic properties, known as smart or functional materials, have diverse applications in science and technology. This study focused on the effects of cobalt ions at different concentrations on the structural, optical, and magnetic properties of Co-doped ZnAl2O4. The research revealed a decrease in bandgap and ferromagnetic behavior in the Co-doped ZnAl2O4 samples, showing potential for energy storage applications.
Article
Chemistry, Multidisciplinary
Thirumala Rao Gurugubelli, Bathula Babu, Jonghoon Kim, Kisoo Yoo
Summary: Fe-doped ZnAl2O4 nanosheets were successfully synthesized using a hydrothermal method, and characterized through various techniques to confirm their purity and crystal structure. Fe doping significantly modified the bandgap energy of ZnAl2O4 and led to the emergence of room temperature ferromagnetism.
Article
Energy & Fuels
Ch Venkata Reddy, I. Neelakanta Reddy, K. Ravindranadh, Bhargav Akkinepally, Fernando Alonso-Marroquin, Kakarla Raghava Reddy, Bai Cheolho, Jaesool Shim
Summary: This study successfully synthesized Au-doped BiVO4 nanostructured catalysts with different concentrations of Au ions to exhibit excellent electrochemical behavior and PEC properties. The optimal doped electrode showed lower resistance to charge transfer, significant enhancement in photocurrent density, and higher electrochemical capacitance attributed to increased surface area and suitable band gap. The proper incorporation of Au ions significantly improved the solar PEC water splitting and supercapacitor performance of the optimal doped electrodes.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
Govinda Dharmana, Thirumala Rao Gurugubelli, Prabhakara Srinivasa Rao Masabattula, Bathula Babu, Kisoo Yoo
Summary: The morphology, chemical composition, and doping process of metal oxides and sulfides greatly influence their photocatalytic performance under solar light. In this study, Cu2+-doped ZnO-SnS nanocomposites were successfully synthesized and characterized using various techniques. The nanocomposites exhibited strong photocatalytic activity and high photodegradation efficiency, which can be attributed to the separation of charge carriers, a change in bandgap, and strong light absorption ability.
Article
Energy & Fuels
Bhargav Akkinepally, I. Neelakanta Reddy, V Manjunath, M. Reddy, Yogendra Kumar Mishra, Tae Jo Ko, Karim Zaghib, Jaesool Shim
Summary: LZP and LAZP anode materials were synthesized and studied for rechargeable battery applications. The results showed that LAZP exhibited higher stability and capacity compared to LZP. Temperature was found to have a significant impact on the discharge capacity. Additionally, the LAZP cell showed good real-time charge holding performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Lakshmiprasad Maddi, Thirumala Rao Gurugubelli, Bathula Babu, Kisoo Yoo
Summary: Pristine and Cu-doped ZAO nanosheets were successfully synthesized via the hydrothermal method. The morphology of ZAO changed significantly with the doping of Cu ions, and the bandgap of Cu-doped ZAO nanosheets was smaller than that of pure ZAO. The synthesized material, with tunable bandgap, can be used as a potential candidate for energy-based applications.
Article
Environmental Sciences
Abhijit N. Kadam, Bathula Babu, Sang-Wha Lee, Jonghoon Kim, Kisoo Yoo
Summary: Monoclinic BiVO4 dendrites were successfully synthesized using a simple hydrothermal method, showing significantly enhanced photocatalytic activity and photoelectrochemical performance. The unique dendritic morphology of BVO 2-2 provided more photoactive sites and better light utilization, leading to improved separation of electron-hole pairs. Overall, these findings suggest the potential for developing dendritic nanostructured photocatalysts with enhanced performance for environmental remediation applications.
Article
Materials Science, Multidisciplinary
Y. J. An, B. Bathula, K. Yoo, H. M. Kwon, S. B. Eadi, H. D. Lee
Summary: The analog resistive switching characteristics of a SnO2 quantum dot synaptic device were investigated. A SnO2-QD thin film was deposited on a substrate and a Ti/Pt/SnO2-QDs/Pd sandwich structure was fabricated. The device exhibited remarkable analog resistive switching characteristics, including fast operation, reliability, and linear increase and decrease in synaptic weight. It also showed a high on/off ratio of approximately 103 and improved non-linearities of long-term depression and long-term potentiation.
Article
Chemistry, Multidisciplinary
Govinda Dharmana, Thirumala Rao Gurugubelli, Balaga Viswanadham, Babu Bathula, Kisoo Yoo
Summary: Iron-doped ZnO/SnS nanocomposites were successfully synthesized using a hydrothermal process. X-ray diffraction patterns confirmed the crystal structures of ZnO and SnS. TEM images showed nanorods and nanoparticle clouds, and XPS analysis verified the oxidation state of the iron dopant. Absorption spectroscopy revealed a decreased energy bandgap with increased iron content, and photoluminescence analysis demonstrated improved charge carrier recombination in ZSF3 sample. Notably, the optimized ZSF3 sample displayed 95.8% higher photocatalytic activity during the degradation of MB dye. This study highlights the potential of hydrothermal synthesis for creating iron-doped ZnO/SnS nanostructures with tunable properties and enhanced photocatalytic activity.
JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Physical
Babu Bathula, Thirumala Rao Gurugubelli, Jihyung Yoo, Kisoo Yoo
Summary: This review article provides an overview of the current developments in SnO2 quantum dots (QDs) as effective catalysts over the last five years. SnO2 QDs have high potential for catalytic applications due to their unique characteristics such as high surface area, compact size, and adjustable optical properties. Recent progress in the production and functionalization of SnO2 QDs has enabled their successful use as photocatalytic catalysts. The article covers the fundamental concepts, production techniques, and challenges associated with using SnO2 QDs as catalysts, and provides insights into the future research directions in this field.
Article
Chemistry, Inorganic & Nuclear
Bathula Babu, Shaik Gouse Peera, Kisoo Yoo
Summary: This article describes the synthesis of colloidal SnO2 quantum dots and ZnWO4 nanorods using wet chemical synthesis and hydrothermal synthesis, respectively. The resulting core-shell ZnWO4-SnO2 heterostructure exhibits improved structural, optical, and morphological properties. The heterostructure shows increased reactive sites exposure and enhanced redox activity, leading to better photoelectrochemical performance and light-harvesting capabilities. The core-shell nanorod heterostructure holds promise for applications in optoelectronic devices and solar energy conversion.
Article
Chemistry, Physical
Tejaswi Tanaji Salunkhe, Govinda Dharmana, Thirumala Rao Gurugubelli, Babu Bathula, Kisoo Yoo
Summary: Dysprosium-doped ZnO/SnS nanophotocatalysts with different concentrations showed promising photocatalytic activity and suppressed luminescent intensity, indicating potential applications in pollutant degradation.
Article
Crystallography
Bhargav Akkinepally, Gara Dheeraj Kumar, I. Neelakanta Reddy, H. Jeevan Rao, Patnamsetty Chidanandha Nagajyothi, Asma A. Alothman, Khadraa N. Alqahtani, Ahmed M. Hassan, Muhammad Sufyan Javed, Jaesool Shim, Mudasir Yatoo, Akram Alfantazi, Sivaprakash Sengodan
Summary: Metal-organic frameworks (MOFs) have shown potential to enhance supercapacitor performance when combined with aqueous based electrolytes. This study compared the supercapacitor performance of MIL-101(Fe) electrodes synthesized using hydrothermal and microwave-assisted processes, and found that the electrodes from hydrothermal synthesis exhibited excellent electrochemical activity and cyclic stability, making them a promising candidate for advanced applications in energy storage.
Article
Environmental Sciences
Bathula Babu, Bhusankar Talluri, Thirumala Rao Gurugubelli, Jonghoon Kim, Kisoo Yoo
Summary: The nitrogen-annealing environment significantly improves the electrochemical performance of SnO2 quantum dots, leading to higher specific capacitance and photocurrent compared to pristine samples.
