Review
Energy & Fuels
Deeptimayee Prusty, Lekha Paramanik, Kulamani Parida
Summary: Alloyed quantum dots are considered as promising and environmentally friendly photocatalysts for hydrogen evolution due to their earth abundance and low cost. Recent research focuses on tuning the optical and electronic properties of alloyed QDs by varying surface atomic ratio and ligand exchange. Challenges and critical issues in utilizing alloyed QDs for H-2 evolution are also discussed, aiming to provide a better understanding of their potential applications.
Article
Chemistry, Multidisciplinary
Kai-Wen Feng, Yang Li
Summary: This article describes the development of an efficient photocatalytic system for hydrogen production from formic acid using in situ generated Ni/CdS. By using CdS-Cys quantum dots as photocatalyst and Ni(OAc)2 as H2 production catalyst precursor, a 94% yield of hydrogen was obtained within 5 hours under visible light irradiation. Mechanistic studies revealed the cooperation of dynamic quenching and static quenching, leading to efficient hydrogen production with high selectivity.
Article
Chemistry, Multidisciplinary
Qitao Chen, Yanhong Liu, Baodong Mao, Zhenyu Wu, Weicheng Yan, Dongxu Zhang, Qian Li, Hui Huang, Zhenhui Kang, Weidong Shi
Summary: In this study, NiPc-modified carbon dots (CDs) are combined with Cu-In-Zn-S quantum dots (CIZS QDs) to enhance the efficiency of photocatalytic hydrogen evolution and organic oxidation reactions. The NiPc-CDs effectively extract electrons and holes and generate and reduce protons. The optimal hydrogen evolution rate is 4.10 mmol g(-1) h(-1), which is 8.10 times higher than that of CIZS QDs and further increased to 11.12 mmol g(-1) h(-1) with the introduction of Ni2+. For benzyl-alcohol-oxidation-coupled H-2 evolution, this strategy shows a dramatic activity enhancement (19.54 times) and is applicable to other oxidation coupling systems. Transient photovoltage spectroscopy and apparent kinetics analysis reveal a light-induced electrocatalysis effect consistent with the Volmer-Heyrovsky process, providing a quasi-quantitative basis for balancing charge extraction and surface reactions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Ruiming Jia, Honggang Lu, Chenjie Wang, Wei Guan, Hongzhou Dong, Beili Pang, Lina Sui, Zhixing Gan, Lifeng Dong, Liyan Yu
Summary: By anchoring two-dimensional layered black phosphorous quantum dots (BPQDs) onto two-dimensional ZnIn2S4 nanosheets, a unique interface is formed to ensure sufficient contact area, facilitating the transport and spatial separation of photogenerated electrons and holes. The synergistic effect of sulfur vacancies and type-II heterojunction results in excellent photocatalytic hydrogen evolution performance of the BPQDs/V-ZIS composites.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Qiang Ju, Hailing Huo, Chengxi Huang, Tongyu Wang, Xuan Liu, Zikun Liang, Liang Zhang, Jingjing Ma, Erjun Kan, Ang Li
Summary: This study unlocks the potential of In2S3 as a photocatalytic overall water splitting material through a size-dependent strategy based on the quantum confinement effect. It provides a simple strategy to expand the range of material choices for hydrogen and hydrogen peroxide production through photocatalysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Chemistry, Physical
Ruben Ramirez, Arianna Melillo, Silvio Osella, Abdullah M. Asiri, Hermenegildo Garcia, Ana Primo
Summary: A general method is reported to prepare MXene quantum dots (MxQDs) with yields over 20% by liquid-phase laser ablation of the MAX phase. Mechanical and thermal shock by 532 nm laser pulses produces MAX etching and exfoliation to form MXene QDs, avoiding the use of HF. The method is applied to various MAX phases and the MXene size reduction to the nanometric scale allows for control of the band gap. The MXene QDs show high photocatalytic activity for hydrogen evolution.
Article
Nanoscience & Nanotechnology
Xinrui Chen, Siyu Zhao, Xiheng Kang, Caiyu He, Peitao Zhao, Xianzhi Meng, Arthur J. Ragauskas, Jingdong Pang, Xueping Song
Summary: This study reports a green and simple strategy to produce Na+-functionalized carbon quantum dots (Na+-CQDs), N and S co-doped CQDs (N/S-CQDs), and N and S co-doped KOH-activated carbon (N/S-KAC) from black liquor (BL) using dialysis, hydrothermal carbonization, and activation-carbonization. The resulting materials showed excellent photoluminescence and up-conversion luminescence, leading to improved hydrogen evolution efficiency and supercapacitor performance. This study provides a versatile and scalable approach for the construction and co-production of nanostructured materials, photocatalysts, and energy storage devices.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Chemistry, Physical
Hao Zhang, Qi Feng, Fan Yu, Yong Wang, Changqing Liu, Qianqian Liu, Lixiong Yin, Jianfeng Huang, Xingang Kong
Summary: In this study, a MoS2-modified CdS photocatalyst was developed, which exhibited enhanced hydrogen production activity. The loading of MoS2 improved the separation efficiency of photogenerated carriers and formed new migration paths, leading to prolonged carrier lifetime.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
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
Chemistry, Multidisciplinary
Shiyue Qi, Yahui Miao, Ji Chen, Huichao Chu, Bingyang Tian, Borong Wu, Yanju Li, Baoping Xin
Summary: The study successfully produced biosynthetic ternary ZnCdS photocatalysts using sulfate-reducing bacteria, which exhibited remarkable photocatalytic activity and stability under visible light, making them suitable for solar hydrogen production.
Review
Chemistry, Physical
Haiwei Su, Weikang Wang, Run Shi, Hua Tang, Lijuan Sun, Lele Wang, Qinqin Liu, Tierui Zhang
Summary: Photocatalytic water splitting plays a crucial role in addressing global energy and environmental challenges. Quantum dot (QD)-based catalysts show great potential for photocatalytic hydrogen production due to their multi-exciton generation, impressive light harvesting, and excellent photochemical properties. This review summarizes recent advances in QDs for photocatalytic H2 production, including different synthetic and characterization strategies. The role of various QDs in different systems, as well as the mechanisms and key factors enhancing photocatalytic H2 generation, are discussed. Conclusions and future perspectives on highly efficient QDs-based photocatalysts for innovative applications are highlighted.
Article
Engineering, Environmental
Hanxiang Chen, Zhao Mo, Zeming Wang, Pengcheng Yan, Peipei Sun, Guanyu Wu, Jinyuan Zhang, Xianglin Zhu, Liang Wang, Hui Xu
Summary: Mimicking natural photosynthesis by using carbon nitride-based photocatalysts to convert solar power into hydrogen energy has been hindered by the addition of metallic cocatalysts. To overcome this issue, a metal-free photocatalytic system was developed by grafting nitrogen-doped graphene quantum dots (NGQDs) onto porous ultrathin carbon nitride (PUCN). The integration of N-GQDs enhanced the hydrogen production rate of the photocatalyst by 208 times compared to PUCN. This new metal-free photocatalyst outperforms most carbon nitride-based photocatalysts with metallic cocatalysts, offering potential for practical applications in photocatalytic water splitting.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Yanbing Li, Pengfei Zhu, Noritatsu Tsubaki, Zhiliang Jin
Summary: The design and construction of hierarchical CoP/ZnCdS/Co3O4 quantum dots biheterostructure cages, as an ultrahigh-performance photocatalyst for hydrogen evolution with visible light, is investigated. The structure integrates ZnCdS solid solution, high-conductivity CoP, and high-efficiency Co3O4 QDs, providing efficient electron transfer pathways, large reaction surface, and abundant active sites.
Article
Engineering, Chemical
Yijiang Chen, Shan Yu, Yunqian Zhong, Yi Wang, Jiale Ye, Ying Zhou
Summary: This study constructed an indium phosphide quantum dot and carbon quantum dot hybrid system and applied it in photocatalytic hydrogen production. The results showed that the hybrid system had a 2.1 times higher photocatalytic performance compared to the indium phosphide quantum dots alone. The introduction of carbon quantum dots improved the separation efficiency of photo-generated carriers and reduced the repulsion between the catalyst and reaction substrate, promoting the surface oxidation reaction in the photocatalytic process.
Article
Biochemistry & Molecular Biology
Xing Liu, Longxin Hu, Yujie Zhang, Hua Lai, Gang Peng, Junhua Li, Rongying Zeng, Zhengji Yi
Summary: In this study, carbon nitride quantum dots (CNQDs)-modified cobalt phosphate (CoPi) composites CNQDs/CoPi-x (x=1, 2, 3) were synthesized and characterized. The modified CNQDs/CoPi-x showed enhanced photocatalytic activity and stability for hydrogen evolution compared to pure CoPi. The highest hydrogen evolution rate was achieved by CNQDs/CoPi-2, which was 2.4 times higher than that of CoPi. The improved performance was attributed to boosted electron transfer and visible-light activity of CNQDs.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2023)
Article
Chemistry, Physical
Eminegul Genc Acar, Talha Kuru, Adem Sarilmaz, Ilknur Aksoy Cekceoglu, Gizem Yanalak, Emre Aslan, Sultan Suleyman Ozel, Gamze Karanfil Kacmaz, Faruk Ozel, Imren Hatay Patir
Summary: In this study, cubic Mn2Mo6S8, Fe2Mo6S8, and Cu2Mo6S8 Chevrel phase catalysts with homogeneous atomic distribution were synthesized and characterized. Mn2Mo6S8 exhibited the highest photocatalytic hydrogen evolution activity and superior antibacterial activity. These findings are of great importance for energy conversion and storage technologies as well as antibacterial applications.
Article
Chemistry, Multidisciplinary
Eminegul Genc Acar, Tuncay Ince, A. Celil Yuzer, Gizem Yanalak, Cihan Gecgel, Emre Aslan, Mine Ince, Imren Hatay Patir
Summary: Two zinc phthalocyanine derivatives carrying bulky peripheral substituents have been synthesized and their performances as photosensitizers in photochemical hydrogen production evaluated. The results showed that ZnPc 1 exhibited better performance compared to ZnPc 2, and the presence of Pt enhanced the hydrogen production performance of the photocatalyst.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2023)
Article
Nanoscience & Nanotechnology
Sinem Altinisik, Gizem Yanalak, Imren Hatay Patir, Sermet Koyuncu
Summary: This study reports a novel COF structure for efficient photocatalytic hydrogen evolution, achieved by combining a biphenyl-bridged dicarbazole electroactive donor skeleton with a viologen acceptor structure. The COFs exhibited improved flexibility and crystal behavior as the length of the alkyl chain increased. The TPCBP B-COF structure showed significantly higher H2 evolution rate and apparent quantum efficiency, making it one of the best-performing catalysts for photocatalytic hydrogen evolution.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Muenevver Tuna Genc, Adem Sarilmaz, Semih Dogan, Ilknur Aksoy Cekceog, Abdurrahman Ozen, Emre Aslan, Burcu Saner Okan, Juhana Jaafar, Faruk Ozel, Mustafa Ersoz, Imren Hatay Patir
Summary: This study focuses on the synthesis of heterostructured TEGO/ZnO nanocomposite catalyst by combining recycled carbon source with ZnO. Photodeposited MoSx and Pt on TEGO/ZnO nanocomposite show enhanced photocatalytic activity and stability as well as antibacterial activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Talha Kuru, Gizem Yanalak, Adem Sarilmaz, Emre Aslan, Ali Keles, Munevver Tuna Genc, Faruk Ozel, Imren Hatay Patir, Mahmut Kus, Mustafa Ersoz
Summary: Photocatalytic hydrogen evolution using semiconductor materials to convert solar energy into chemical energy has been effectively studied. Perovskite-based materials have been widely used as semiconductor catalysts for this purpose. In this study, molybdenum sulfide photodeposited onto MTiO3 (M: Ba, Sr) perovskites (MTiO3/MoSx) was investigated for photocatalytic hydrogen evolution under solar light irradiation in the presence of triethanolamine and eosin Y. The results showed that BaTiO3/MoSx and SrTiO3/MoSx exhibited significant improvement in hydrogen production efficiency and stability compared to pristine MTiO3. The photocatalytic hydrogen activity followed the order of SrTiO3/MoSx > BaTiO3/MoSx > MoSx > SrTiO3 > BaTiO3. Additionally, SrTiO3/MoSx demonstrated higher hydrogen activity than SrTiO3/Pt due to the presence of active sites created by MoSx on the catalyst surface.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Emineguel Genc Acar, Seda Yilmaz, Zafer Eroglu, Ilknur Aksoy cekceoglu, Emre Aslan, Imren Hatay Patir, Onder Metin
Summary: The effect of transition metal nanoparticles (Ni and Co) as co-catalysts on the photocatalytic activity of BP/WS2 binary heterojunctions was investigated. Ternary heterojunctions with Ni and Co showed substantial hydrogen generation and significantly enhanced photocatalytic activity. This study demonstrates the potential of Ni- and Co-doped BP/WS2 heterojunctions for efficient photocatalytic hydrogen evolution.
Article
Chemistry, Physical
Buket Guntay, Sifa Dogan, Askin Killi, Eminegul Genc Acar, Perihan Kubra Demircioglu, Emre Aslan, Gulbin Kurtay, Imren Hatay Patir, Mine Ince
Summary: In this study, SubPcs with a carboxylic acid anchoring group were utilized as photosensitizers of TiO2 for visible light-driven hydrogen evolution. The impact of various peripheral substituents on the photocatalytic performance of SubPcs was systematically studied. Among the different dye-sensitized photocatalysts, SubPc 2/TiO2/Pt exhibited the highest hydrogen evolution rate of 1.104 mmol center dot g(-1)center dot h(-1). Theoretical calculations based on DFT and TD-DFT methods provided insights into the structural and electrical properties of the tailored SubPcs, showing good agreement with experimental data. The fluctuations in photocatalytic activity observed in SubPc systems were found to be associated with frontier molecular orbital characteristics, noncovalent interaction patterns, and the electron-donating nature of the peripheral groups.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Eminegul Genc Acar, Seda Yilmaz, Zafer Eroglu, Emre Aslan, Onder Metin, Imren Hatay Patir
Summary: The design of semiconductor-based heterojunctions is an effective strategy to build highly active photo-catalyst systems. In this study, tungsten disulfide (WS2) modified graphitic carbon nitride (gCN) hetero-junction (gCN/WS2) is incorporated with Co and Ni (gCN/WS2-Co and gCN/WS2-Ni) to enhance the photocatalytic hydrogen evolution reaction (HER) activity of gCN/WS2 via performing a chemical reduction method and characterized by advanced analytical techniques. The improvement of photocatalytic activity and stability of gCN/ WS2-Ni and gCN/WS2-Co nanocomposites could be attributed to the 2D/2D heterojunction structure, extended light harvesting ability, increased electron-hole lifetime and decreased recombination rate of the charge carriers. Moreover, mechanistic studies revealed that a S-scheme heterojunction is attributed to the enhanced photocatalytic HER by the gCN/WS2-Ni and gCN/WS2-Co photocatalysts, which provides promoted efficiency by photocarrier transfer and separation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Biomaterials
Tugce Ozcan, Ilknur Aksoy cekceoglu, Khattab Al-Khafaji, Erkan Oner, A. Celil Yuzer, Serap Yalin, Emre Aslan, Mine Ince, Imren Hatay Patir
Summary: The antibacterial properties of zinc phthalocyanines (ZnPcs) sensitized TiO2 on Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were investigated. The results showed that the photogenerated reactive oxygen species (ROS) can damage bacterial membrane, protein, and biofilms. Computational analysis also revealed the molecular antibacterial mechanisms of ZnPc-1 and ZnPc-2 against different bacterial strains.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Engineering, Environmental
Talha Kuru, Adem Sarilmaz, Ilknur Aksoy Cekceoglu, Emre Aslan, Aysenur Gencer, Gokhan Surucu, Faruk Ozel, Imren Hatay Patir
Summary: This study investigates the structural, mechanical, dynamical, and electronic properties of Fe2Mo6Se8 and Cu2Mo6Se8 seleno-Chevrel phases. The seleno-Chevrel phases exhibit antibacterial and antibiofilm activities against Staphylococcus aureus and Escherichia coli under infrared and white light illumination. Fe2Mo6Se8 demonstrates higher photocatalytic hydrogen evolution rate compared to Cu2Mo6Se8.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Gizem Yanalak, Begumhan Karapinar Koc, Seda Yilmaz, Muhammad Israr, Mustafa Ersoz, Onder Metin, Imren Hatay Patir
Summary: The study presents the fabrication of a ternary heterojunction photocatalyst composed of mesoporous graphitic carbon nitride, black phosphorus, and molybdenum disulfide. The addition of Ni and Co co-catalysts improved the photocatalytic activity. By optimizing the loading ratio of each component, the best combination of semiconductors was found to achieve the highest photocatalytic hydrogen evolution reaction (HER) activity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
