Article
Nanoscience & Nanotechnology
Mamta Devi Sharma, Mrinmoyee Basu
Summary: Photoelectrochemical water splitting is a greener method for hydrogen production, but developing suitable semiconductor materials for practical applications is a challenge. This study investigates CdIn(2.2)Sy (CIS) as a visible-light-active semiconductor photoanode and enhances its efficiency and stability by decorating it with S and N codoped C-dots (S, N-CDs). The results show that this design improves photocurrent density and photoconversion efficiency while maintaining stability under continuous back illumination.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yuxiang Wang, Daoming Chen, Jingnan Zhang, M-Sadeeq (Jie Tang) Balogun, Pingshan Wang, Yexiang Tong, Yongchao Huang
Summary: Carbon doping and introduction of carbon quantum dots can improve the electronic conductivity and light absorption capability of BiVO4, thus enhancing the separation and transfer of photo-generated charges. Electroplating a polyaniline layer onto the catalyst can sustain a stable photocurrent density for a long time.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Analytical
Kai Song, Jianwei Lin, Yafeng Zhuang, Zhizhong Han, Jinghua Chen
Summary: In this study, carbon dots and black phosphorus quantum dots were used to enhance the photoelectrochemical properties of titanium dioxide composites, enabling sensitive detection of DNA. The method involved preparation of well-dispersed CDs and uniform BPQDs, resulting in improved PEC performance. The constructed TiO2-based detection method exhibited good sensitivity, a wide detection range, and specificity, showing promise for detecting other biomolecules.
Article
Chemistry, Physical
Xiaohan Wang, Maorong Wang, Guiju Liu, Yuanming Zhang, Guangting Han, Alberto Vomiero, Haiguang Zhao
Summary: This study demonstrated a highly efficient and stable ecofriendly PEC device using C-dots sensitized TiO2 photoanode, Pt loaded on carbon nanofibers as counter electrode, and glucose aqueous solution as electrolyte. The C-dots showed excellent optical properties and structure, interacting strongly with TiO2 to form a stable complex. The PEC devices based on C-dots exhibited a saturated photocurrent density as high as about 4 mA/cm(2) at 0.6 V vs. RHE, and maintained 95% of their initial value after 10-hour illumination at 100 mW/cm(2).
Article
Chemistry, Multidisciplinary
Yuanming Wang, Xue Wang, Xifei Li, Xiaolong Li, Yang Liu, Yang Bai, Huanhao Xiao, Guohui Yuan
Summary: A high-performance, tailorable and foldable solid-state asymmetric supercapacitor was developed through regulating oxidization time and MXene loading, fundamentally avoiding the risk of active materials detaching during mechanical deformation. This device achieved extended voltage window, high energy density, and capacitance retention after cycles, showing potential practical application.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Lin Cui, Xin Ren, Mengtao Sun, Haiyan Liu, Lixin Xia
Summary: Carbon dots (CDs) are emerging as a promising carbon-based nanomaterial with unique electronic and optical properties, making them attractive for biomedical and photocatalytic applications. The CDs possess low toxicity, good biocompatibility, excellent photostability, tunable fluorescence, outstanding efficient up-converted photoluminescence behavior, and photo-induced electron transfer ability, which enhances their potential in various fields.
Review
Chemistry, Analytical
B. N. Kumara, Palraj Kalimuthu, K. . S. Prasad
Summary: Photoluminescent-carbon nanoparticles (PL-CNPs) have attracted significant interest due to their distinct characteristics, including photoluminescence, high surface-to-volume ratio, low cost, ease of synthesis, high quantum yield, and biocompatibility. They have been extensively studied for their utility in various applications such as sensors, photocatalysts, bio-imaging probes, and optoelectronics. However, some PL-CNPs face limitations in their properties and selectivity, hindering their widespread application. To overcome these challenges, researchers have focused on developing new PL-CNPs with better properties and selectivity using different composite combinations. This review discusses the recent advancements in synthetic strategies, doping effects, photostability, biocompatibility, and applications of PL-CNPs in sensing, bioimaging, and drug delivery, as well as their limitations, future directions, and potential applications.
ANALYTICA CHIMICA ACTA
(2023)
Review
Chemistry, Multidisciplinary
Jian Gan, Lizhen Chen, Zhijun Chen, Jilei Zhang, Wenji Yu, Caoxing Huang, Yan Wu, Kai Zhang
Summary: Carbon dots (CDs), a type of carbon-based fluorescent nanomaterial, have gained attention for their excellent properties. Lignocellulosic biomass, a renewable natural resource, has the potential to produce CDs. This review summarizes the recent advances in the synthesis processes, formation mechanisms, structural characteristics, optical properties, and applications of lignocellulosic biomass-based CDs. It also proposes future research directions to improve the synthesis technology and enhance the properties of CDs using lignocellulosic biomass as raw materials.
Article
Chemistry, Physical
Yidong Han, Jie Wu, Yi Li, Xiaoqing Gu, Tiwei He, Yu Zhao, Hui Huang, Yang Liu, Zhenhui Kang
Summary: In this study, nitrogen-doped carbon dots (N-CDs) anchored TiO2 photoanodes were fabricated by one-step hydrothermal method, and the mechanism of how it improves the photoelectrochemical (PEC) performance was explained through in-situ characterization. The results showed that after anchoring N-CDs, the photo-generated charge separation efficiency and charge transfer efficiency of TiO2 were significantly improved, and the conductivity of TiO2 was enhanced as well.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Allyn Pramudya Sulaeman, Rifky Adhia Pratama, Uji Pratomo, Irkham, Avtar S. Matharu, Indah Primadona
Summary: By sensitizing ZnO nanopencils with sulfur and nitrogen co-doped graphene quantum dots (S,N-GQDs), the photo absorption range of ZnO nanopencils can be expanded to the visible light spectrum, and the light harvesting efficiency can be significantly improved. The results indicate that ZnO NPc/S,N-GQDs shows remarkable improvement in photoelectrochemical activity under visible light irradiation.
Article
Materials Science, Multidisciplinary
Fan Li, Chun-Lai Wang, Sheng Ding, Kun Yang, Chang-Jun Liu, Feng Tian
Summary: In this study, carbon dots (CDs) or nanocomposites of CDs and TiO2 were used to decorate titanium dioxide nanotube arrays (TiO2NTs) by solvothermal method. The decorated TiO2NTs showed enhanced photocurrent under visible light, with CDs-TiO2NTs-0 showing the highest photocurrent density. Photodegradation measurements revealed that CDs-TiO2 decorated TiO2NTs exhibited superior photocatalytic activity under both UV and visible light illumination.
Article
Materials Science, Multidisciplinary
Naixin Li, Fang Lei, Dandan Xu, Yong Li, Jinliang Liu, Ying Shi
Summary: In this study, nitrogen and phosphorus co-doped carbon dots were prepared using a solvothermal synthesis strategy, resulting in improved electronic properties and tunable luminescence. The prepared carbon dots showed excitation-dependent emission in the blue region and excitation-independent emission in the orange region, with a high quantum yield of 47%. The N, P-CDs were found to be non-toxic to cells and suitable for cell imaging applications, suggesting their potential as excellent bioimaging probes.
Review
Chemistry, Multidisciplinary
Xueping Song, Siyu Zhao, Ying Xu, Xinrui Chen, Shuangfei Wang, Peitao Zhao, Yunqiao Pu, Arthur J. Ragauskas
Summary: This article summarizes the recent research progress in the preparation of carbon dots from lignocellulosics. It reviews the traditional and new preparation methods, physical and chemical properties, optical properties, and applications of these carbon dots. The challenges of synthesizing lignocellulosic carbon dots are highlighted, and current trends and opportunities are examined, with some suggestions for future research.
Review
Biochemistry & Molecular Biology
Joanna Szczepankowska, Gohar Khachatryan, Karen Khachatryan, Magdalena Krystyjan
Summary: This review discusses the types and methods of obtaining carbon dots, as well as their potential applications in biotechnology and food technology.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Tianqi Cui, Yue Wu, Zhaohua Wang, Qingfeng Ban, Jianjun Cheng
Summary: An antibacterial carbon dot hydrogel was developed using gelatin, dialdehyde starch, and carbon dots. The hydrogel exhibited improved mechanical and rheological properties with increasing carbon dot content. It showed pH-dependent swelling and degradation behavior, as well as controlled release ability. The hydrogel demonstrated synergistic antibacterial effects against Staphylococcus aureus, with the carbon dots playing the main antibacterial role.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2024)
Article
Chemistry, Physical
Yunjie Zhou, Xiaoqing Gu, Jie Wu, Hui Huang, Mingwang Shao, Yang Liu, Zhenhui Kang
Summary: In this study, cobalt-doped carbon dots were used to regulate the electron transport kinetics on polyaniline, resulting in improved selectivity and activity of the oxygen reduction reaction. The obtained catalyst showed high selectivity for H2O2 production and provided new insights for the design of two-electron ORR catalysts and the study of electrocatalytic kinetics.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Yong-Lin Huo, Yi-Jing Gu, Zi-Liang Chen, Xiao-Yu Ma, Fu-Zhong Wu, Xin-Yi Dai
Summary: In this study, Li1.2Ni0.2Mn0.6-xAlxO2 cathodes with an in situ-synthesized Li2CO3 coating layer were used to improve their electrochemical performance. The coating layer inhibited the structural transition and reduced the generation of Mn3+. The Li1.2Ni0.2Mn0.56Al0.04O2@Li2CO3 coating sample showed excellent capacity retention and low voltage decay. Lithium-ion full cells composed of Li1.2Ni0.2Mn0.56Al0.04O2@Li2CO3 and graphite exhibited high energy density with good capacity retention.
Article
Chemistry, Multidisciplinary
Ziliang Chen, Hongyuan Yang, Stefan Mebs, Holger Dau, Matthias Driess, Zhaowu Wang, Zhenhui Kang, Prashanth W. Menezes
Summary: A hydrogen processing strategy is developed to improve the performance of LaNi5 as an electrocatalyst for the oxygen evolution reaction (OER). The surface of LaNi5 is reconstructed into a porous hetero-nanoarchitecture composed of gamma-NiOOH nanocrystals, which optimizes the charge transfer and structural integrity. The hydrogen-processed OER catalyst shows a significantly reduced overpotential and remarkable stability in alkaline media, making it a promising candidate for industrial applications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qiang Hong, Yingming Wang, Ruirui Wang, Ziliang Chen, Hongyuan Yang, Kai Yu, Yang Liu, Hui Huang, Zhenhui Kang, Prashanth W. Menezes
Summary: A unique heterocomposite consisting of carbon dots (CDs) inserted into cobalt-based zeolitic imidazolate framework (Co-ZIF) nanosheet arrays (Co-ZIF/CDs/CC) has been constructed for alkaline oxygen evolution reaction (OER), demonstrating improved OER activity and electron conductivity.
Article
Chemistry, Multidisciplinary
Chengyu Fu, Weiju Hao, Jinli Fan, Qiang Zhang, Yanhui Guo, Jinchen Fan, Ziliang Chen, Guisheng Li
Summary: In this study, highly efficient and robust Ni-P-based nanoballs (NiPx@HA) grown on hydrophobic asbestos were synthesized for alkaline simulated seawater electrolysis. The strong chemical attachment between the substrate and nickel-rich components, as well as the hexagonal Ni5P4 crystalline modification and fast electron transfer capability contribute to the excellent performance. The versatile strategy allows for multi-elemental doping, flexible substrate employment, and scalable synthesis.
Article
Chemistry, Multidisciplinary
Yingming Wang, Hui Huang, Jie Wu, Hongyuan Yang, Zhenhui Kang, Yang Liu, Zhaowu Wang, Prashanth W. W. Menezes, Ziliang Chen
Summary: Se-vacancy with charge polarization is created in the NiSe2 structure, which enhances the stability, decreases the electron transfer kinetics, and optimizes the free adsorption energy of reaction intermediate. The prepared NiSe2-V-Se exhibits high selectivity in alkaline media and excellent stability over a wide potential range.
Article
Nanoscience & Nanotechnology
Yong-Lin Huo, Yi-Jing Gu, Zi-Liang Chen, Xiao-Yu Ma, Yi-Ge Xiong, Hua-Fei Zhang, Fu-Zhong Wu, Xin-Yi Dai
Summary: A technique of stabilizing the crystal structure and reducing the surface oxygen activity is proposed, achieving better voltage attenuation and capacity retention. The addition of a coating layer and highly concentrated oxygen vacancies inhibits structural transformation and oxygen release during the charge and discharge process.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Hongyuan Yang, Pramod V. Menezes, Guoliang Dai, Gonela Vijaykumar, Ziliang Chen, Mohammad Al-Shakran, Timo Jacob, Matthias Driess, Prashanth W. Menezes
Summary: Developing bifunctional electrodes for oxidation catalysis is highly desirable for hydrogen and value-added chemicals production. Here, we directly activate the nickel foam through the incorporation of elemental P (P-NF) using a facile, controllable, and ultrafast in-liquid plasma electrolysis approach. The practical bifunctionality of P-NF is additionally verified with selective oxygenation of organics forming value-added chemicals.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Yunjie Zhou, Liang Xu, Jie Wu, Wenxiang Zhu, Tiwei He, Hao Yang, Hui Huang, Tao Cheng, Yang Liu, Zhenhui Kang
Summary: We demonstrate an ideal ZnO@ZnO2 electrocatalyst for efficient oxygen reduction to hydrogen peroxide in a neutral medium. The in situ growth of ZnO2 on ZnO forms heterogeneous interfaces, weakening the binding energies of OOH* and O*. In a 0.1 M K2SO4 electrolyte, ZnO@ZnO2 exhibits nearly 100.0% selectivity for H2O2 production and a production rate of 5.47 mol g(cat)(-1) h(-1) at 0.1 V vs. RHE, with a Faraday efficiency of approximately 95.5%.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yong-Lin Huo, Yi-Jing Gu, Zi-Liang Chen, Xiao-Yu Ma, Fu-Zhong Wu, Xin-Yi Dai
Summary: This study synthesized manganese-based metal-organic frameworks with different structures using aromatic carboxylic acids as precursors, and then used them to prepare spinel LiMn2O4 cathode materials. The aim was to enhance capacity, cycle stability, and rate performance by reducing diffusion resistance, exposing the (111) plane, and increasing the Mn3+ content.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Computer Science, Artificial Intelligence
Yongsen Zheng, Pengxu Wei, Ziliang Chen, Chengpei Tang, Liang Lin
Summary: To enhance recommendation accuracy and interpretability, it is important to incorporate side information into user-item interactions. This article proposes an end-to-end framework called KURIT-Net, which utilizes user-interest Markov trees to reconfigure recommendation-based knowledge graphs, striking a good balance between short and long-distance relations for knowledge routing. KURIT-Net outperforms state-of-the-art approaches in recommendation and provides human-readable explanations for model predictions.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Computer Science, Artificial Intelligence
Yongsen Zheng, Pengxu Wei, Ziliang Chen, Yang Cao, Liang Lin
Summary: We propose an effective neural recommender system called graph-convolved factorization machine (GCFM), which extends feature interactions from pairs to neighbors, capturing more comprehensive and explainable information while reaping the advantages of representation learning. GCFM significantly outperforms state-of-the-art algorithms and shows interpretability in recommendation tasks.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Computer Science, Artificial Intelligence
Junfan Lin, Keze Wang, Ziliang Chen, Xiaodan Liang, Liang Lin
Summary: The medical diagnosis assistant aims to build an interactive diagnostic agent that can discriminate diseases by sequentially inquiring about symptoms. However, passive data collection may introduce task-unrelated biases that hinder the agent's ability to learn transportable knowledge. This work identifies and resolves two representative non-causal biases and proposes solutions to improve the diagnostic accuracy and generalization.
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
(2023)
Article
Chemistry, Applied
Yingming Wang, Hongyuan Yang, Zhiwei Liu, Kui Yin, Zhaowu Wang, Hui Huang, Yang Liu, Zhenhui Kang, Ziliang Chen
Summary: This study explores the use of layered nickel ditelluride as an electrocatalyst for the two-electron oxygen reduction reaction (2e- ORR), demonstrating high selectivity and activity in both alkaline and neutral media. In situ Raman spectra, theoretical calculations, and microstructural analysis reveal the underlying factors contributing to its excellent performance.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Tianyu Yang, Ziliang Chen, Yingming Wang, Hui Huang, Kui Yin, Fan Liao, Yang Liu, Zhenhui Kang
Summary: An oriented coupling strategy is developed for the acidic hydrogen evolution reaction by in situ inserting hollow porous Co/NC nanocage by Si nanowires, which delivers remarkable activity and stability. The presence of Si nanowire toward Co/NC polyhedra not only facilitates the charge transfer during catalysis, but also optimizes the hydrogen adsorption and desorption.