ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Zheng Lv,Zonghan Guo,Dan Li,Haipeng Jiang,Fengyou Wang,Lin Fan,Maobin Wei,Lili Yang
To broaden the light-harvesting spectrum of perovskite solar cells (PSCs), WO3-X @CdS heterojunctions have been synthesized by in situ growing CdS nanoparticles on WO3-X nanorods rich in oxygen vacancies. After introducing them into perovskite layers by the antisolvent method, the localized surface plasmon resonance (LSPR) effect of WO3-X@CdS extends photon absorption into the near-infrared region, while both lattice match and its coordination with iodide ions facilitate uniform nucleation and crystallization process to obtain high-quality perovskite films. Moreover, this dual-functional material simultaneously optimizes the hole transport layer/perovskite energy alignment and accelerates the interfacial charge transfer via LSPR-induced near-field enhancement effects. The spectral expansion and improved carrier dynamics synergistically boost the power conversion efficiency to 25.08%, demonstrating heterojunction engineering as a viable strategy for advancing broadband PSCs and other optoelectronic devices.
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Regenerative Biomaterials
·
2025
·
IF 8.1
Ullah Ihsan,Ju Jian,Song Yapei,Chen Siyi,Chen Mengshi,Wang Siran,Zhang Wenzhen,Chen Wenhui,Zhifeng You,Li Huaqiong,Wen Feng,Zuo Wei
Bioinert poly (methyl methacrylate) (PMMA) is widely employed as a bone cement material in orthopedic and trauma surgery applications; however, its susceptibility to bacterial infection and bioinert nature limits its clinical applications. In this study, we developed a PMMA-based bone cement incorporating a silver nanoparticle-carbon dots (AgNP@CDs) nanocomposite (∼70 nm) at concentrations (2 wt %) with a Young’s modulus （324.74 ± 7.08 MPa）to simultaneously combat bacterial infections, minimize cytotoxicity, and support tissue regeneration. The CDs stabilize and functionalize AgNPs, improving their dispersion and bioavailability while enabling the controlled and sustained release of antimicrobial ions through incorporation with bone cement. The antibacterial efficacy of the composite was thoroughly evaluated, revealing its ability to disrupt bacterial cell membranes, generate reactive oxygen species and inhibit bacterial growth. These mechanisms collectively contribute to a significant reduction in bacterial growth of up to ∼ 90% in both in vitro and in vivo studies. The incorporation of AgNP@CDs ensures sustained antimicrobial activity, preventing bacterial colonization by controlling the leaching of Ag ions. Biocompatibility assessments showed that the PMMA composite (PMMA@2Ag-CDs) significantly improved cell proliferation, adhesion, and migration compared with pure PMMA bone cement. Additionally, histological analysis revealed that the PMMA group showed a fibrous layer thickness of 699 ± 35.32 µm, indicative of inflammation, while the PMMA@2Ag-CDs group reduced this thickness from 301.18 ± 22.42 µm on day 7 to 198.07 ± 15.21 µm on day 14, significantly decreasing inflammation. The PMMA@2Ag-CDs composite demonstrated better tissue integration, with organized collagen deposition and enhanced angiogenesis, indicating more efficient tissue regeneration. The reduced inflammation and improved tissue remodeling suggest that this composite promotes a more favorable tissue regeneration environment and minimizes complications. This study demonstrates that the PMMA@2Ag-CDs composite offers a promising solution for the prevention of infections and mitigation of inflammatory responses. Functionalization of bone cement through the incorporation of Ag nanoparticle-carbon dot nanocomposites is a promising strategy with potential practical applications in orthopedic and trauma surgery.
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JOURNAL OF POWER SOURCES
·
2026
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IF 8.4
Jiajia Li,Jiayu Xu,Jiuyi Hu,Xiaohan Guo,Zeeshan Ahmad,Qingyu He,Zhixuan Chen,Isha Ishfaq,Ankush Sheoran,Wenjing Liu,Faisal Saleem
Photo-assisted electrocatalysis has emerged as a promising strategy to break the activity limits of electrocatalysts. Here, we develop a highly efficient hybrid catalyst by loading ultra-small PtAg alloy nanoparticles (NPs) on CdS nanorods (PtAg/CdS) for hydrogen evolution reaction. The PtAg/CdS catalyst demonstrates an overpotential of 44 mV at 10 mA cm −2 in the absence of light irradiation, which significantly decreases to 17 mV under light illumination, even exceeding that of commercial Pt/C. This improved performance is attributed to the generation and effective utilization of photogenerated charges. X-ray photoelectron spectroscopy confirms the formation of electron-deficient Ptδ + sites in the nanoparticles after the introduction of Ag, whereby density functional theory calculations reveal a near-optimal hydrogen adsorption free energy. In addition to providing photogenerated charges, light also modulates the electronic structure of the PtAg alloy NPs, leading to a dual optimization of charge transfer kinetics and hydrogen adsorption energy, a synergistic effect that shows the potential of light-responsive alloy catalysts. This work provides a simple and effective interface engineering strategy to enhance photo-assisted electrocatalysis by combining electrocatalysts and light absorbers, and provides a promising way for renewable hydrogen production.
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ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 20
·1800181
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IF 13.325
Bao Jin,Pu Huang,Qi Zhang,Xing Zhou,Xiuwen Zhang,Liang Li,Jianwei Su,Huiqiao Li,Tianyou Zhai
2D nonlayered materials that possess appealing properties are entering the researchers' vision. However, direct access to the 2D level of these materials is still a great challenge due to the instrinsic isotropic chemical bond. This work presents the initially self-limited epitaxial growth of ultrathin nonlayered CdS flakes (as thin as 6 nm) on mica substrate with a large domain size (>40 µm) by employing In 2 S 3 as the passivation agent. Besides, the thickness and sizes of the products could be tunable by the addition level of In 2 S 3 amount. The growth mechanism is evidenced via experiments and theoretical calculations, which is attributed to the surface distortion effect of In–S motif and the preference of local environments for In on the CdS (0001) surface. The photodetector designed on CdS flake demonstrates a high photoswitching ratio (up to 10 3 ), a high detectivity ( D * ≈ 2.71 × 10 9 Jones), and fast photoresponse speed (τ R = 14 ms, τ D = 8 ms). The as-proposed self-limited epitaxial growth method opens a new avenue to synthetize 2D nonlayered materials and will promote their further applications in novel optoelectronic devices.
研究领域:
材料科学
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纳米技术
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光电子学
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外延生长
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半导体材料
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Journal of Materials Chemistry A
·
2015
·Vol. 4
·期 1
·297-302
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IF 7.443
Xiaohui Liu,Yulei Wu,Xiaodong Li,Wenjun Zhang,Lixiao Zhao,Hai-Qiao Wang,Junfeng Fang
Phenanthroline based organic semiconductors (BCP, Bphen, Mphen, and Phen) are used to hybrid with CdS as cathode interlayers in inverted organic solar cells (OSCs). We observed that selecting the polar solvent and hydrophobic interlayers with a diphenyl group could improve the performance of the organic photovoltaic devices. The modification to CdS can effectively improve its electron mobility, film morphology, interfacial contact, and energy level alignment, which finally leads to a significant enhancement of device performance. Through incorporating the CdS–P hybrids (CdS–BCP, CdS–Bphen, CdS–Mphen, and CdS–Phen) as cathode buffer layers, the device PCE (PTB7 : PC71BM as the active layer) is greatly improved from 3.09% to 8.36, 7.84, 6.69, and 6.57%, respectively, compared with devices fabricated on the pristine CdS interlayer. These results indicate that the common inorganic semiconductor like CdS can be modified using some organic semiconductors to produce general applicable electron transport layers applied in OSCs. Our work puts forward new insights for the development of new interface modification materials and fabrication of high efficiency devices.
研究领域:
材料科学
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有机电子学
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光伏技术
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纳米技术
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半导体器件
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Huaiwei Zhang,Yifan Chen,Liang Bao,Jing-yuan Ge
The green synthesis process of photocatalytic ammonia production has received more and more attentions. Herein, a Z-scheme heterojunction with all-solid-state structures is constructed, in which carbon dots can act as electron transferring mediators. The photocatalytic measurement shows that the modified photocatalysts exhibit much higher activities, in which the ammonia production rates can reach above 232 µmol·g cal -1 ·h −1 under the light irradiation. The improved catalytic properties can be credited to the significantly increased number of photoinduced oxygen vacancies, the excellent visible-light adsorption abilities and photogenerated electron-hole separation efficiencies for the carbon dots bridged heterostructures. More hydroxyl and superoxide radicals can be simultaneously produced in the composites. This work provides reasonable guidance for applications in photocatalytic ammonia synthesis and a promising construction strategy of efficient Z-scheme photocatalysts.
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Analytical Methods
·
2022
·Vol. 15
·期 3
·353-360
·
IF 3.532
Qingchun Huang,Hongcan Sun,Changgui Lu,Chunlei Wang,Shuhong Xu
Exploring the origin of emission is fundamental in the field of carbon dots (CDs). Due to the lack of suitable in situ probing techniques, it is necessary to explore effective alternative methods that can accurately reflect the relationship between the emission and the composition of the functional groups of CDs. Herein, we propose a new method of post-synthetic treatment of CDs by photo-oxidation to investigate the origin of emission for CDs. After the addition of a photo-oxidant into pre-prepared CDs under UV irradiation, the fluorescence of CDs can be regulated from the original orange emission to the final green emission due to the damage of original functional groups and the formation of new functional groups on CDs during the post-treatment process. The abundant dynamic information about the functional groups and emissions of CDs during the visible and ready-to-monitor post-treatment process makes it possible to quantitatively analyze the origin of the emission of CDs. Our results suggest that the emission sub-peaks at 560 nm and 600 nm relate to the CD surface-state-associated –NH3+ groups, while the emission sub-peak at 537 nm or 494 nm is associated with the CD surface-state-associated –OH groups or the CD surface-state-associated carbonyl groups (CO). Under UV irradiation, the CD surface-state-associated –NH3+ groups can be continuously converted into the CD surface-state-associated –OH groups and the CD surface-state-associated carbonyl groups (CO), leading to the changed emission color of CDs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Dingliang Dai,Jianhao Qiu,Guanglu Xia,Lu Zhang,Hong Ma,Luan Yang,Jianfeng Yao
Flower-like BiOI was decorated by CdS nanodots and followed by the introduction of iodine vacancies (V I ) for photocatalytic sodium lignosulfonate (SLS) valorization under visible light. The iodine vacancies could adjust the band configuration, strengthen the light absorption and act as electron traps, while the intimate contact between BiOI and CdS nanodots provides a high-speed channel for charge transfer. As a consequence, the photocatalytic performance of SLS conversion into value-added vanillin was greatly improved over CdS/BiOI-V I compared with those of CdS, BiOI and CdS/BiOI. The highest yield of vanillin is 10.95 mg/g SLS over CdS/BiOI-V I , about 5, 8.7, 1.3 times those of CdS, BiOI, CdS/BiOI, respectively, and exceeding most related photocatalysts reported elsewhere. More significantly, as to the lignin from Masson pine and alkali lignin, the corresponding vanillin yield can reach 7.04 and 6.54 mg/g lignin , respectively, under the same condition, which suggests the great potential and universality for photocatalytic lignin valorization over such CdS/BiOI-V I heterostructure.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 3
·1174-1185
·
IF 3.925
Xinyu Liu,Jing Xu,Jiandong Wu,Zhenlu Liu,Shengming Xu
In the process of photocatalysis, semiconductor materials generate photogenerated electrons and photogenerated holes when excited by sunlight, so as to participate in the process of photocatalytic decomposition of water to produce hydrogen. In this work, under the combined action of ultrasonic and electrostatic forces, two semiconductors are successfully coupled through electrostatic self-assembly to effectively avoid the serious phenomenon of sulfide photocorrosion. Through electrochemical and fluorescence characterization experiments, it is confirmed that ZnCo2O4/CdS can accelerate the generation and transmission rates of photogenerated carriers. ZnCo2O4/CdS greatly increased the activity of the catalyst under simulated sunlight irradiation. With good photocatalytic activity, the hydrogen yield reached 80.71 mmol g−1 within 5 hours, far superior to those of Co3O4/CdS and ZnO/CdS. The relative values of the work functions of ZnCo2O4(311) and CdS(110) were calculated by DFT. Combined with the position of the conduction band, it was concluded that a new S-scheme induced by an internal electric field was formed at the ZCO/CS-25% contact interface, thus improving the photocatalytic activity.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Gaimei Gao,Guang Yang,Mingyu Dou,Shirong Kang,Xingliang Yin,Hua Yang,Wenning Yang,Dacheng Li,Jianmin Dou
The development of excellent photocatalysts for hydrogen evolution is of great significance to solving the global energy crisis. In this work, a novel 3D hierarchical CdS/NiAl-LDH photocatalyst was fabricated by a facile electrostatic assembly strategy, which was composed of 1D CdS nanorods and 3D flower-like NiAl-LDH microspheres . Under the visible irradiation, the CNA-20 hierarchical photocatalyst presents the optimum hydrogen evolution rate achieved to 3.24 mmol g −1 h −1 , which is improved 6.23-fold in comparison with the pure CdS. Through the analysis of energy band structures and first-principles calculation, the type-Ⅱ charge transfer mechanism was proposed. Driven by the built-in electric field, as well as the effect of intimate interface contact of CdS and NiAl-LDH, the photogenerated charge could be achieved rapidly separate and migrate, which effectively promotes the H 2 evolution. This well-designed synergistic 1D/3D interface interaction and provides an economic approach to rationally developing metal-free photocatalysts for hydrogen production .
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Jie Zhou,Beibei Zhu,Lu Wang,Yan Bao,Guofeng Guan
Higher electron transfer efficiency is an important way to improve the activity of photocatalysts. A novel Z-scheme CdS/CeO 2 /g-C 3 N 4 nanocomposite was successfully synthesized by a solvothermal method, and its photocatalytic activity was evaluated by the degradation of phenol. The phase structure, morphology, surface structure, and atomic valence state of the as-obtained photocatalyst were characterized by XRD, SEM, TEM, FT-IR, XPS, and UV–Vis absorption spectroscopy, respectively. The CdS/CeO 2 /g-C 3 N 4 nanocomposite exhibited a remarkable photocatalytic activity and a rapid degradation ability for phenol with a degradation rate of 95 % in 180 min, which was considerably better than those of pure CeO 2 and CdS/CeO 2 under the same conditions, suggesting a synergistic effect in the nanocomposite. The enhancement of the photocatalysis ability of the nanocomposite is mainly attributed to the higher adsorption capacity of three-dimensional porous g-C 3 N 4 and the three-dimensional space electric field formed by its complex with CdS and CeO 2 . The three-dimensional porous structure is not only conducive to the efficient adsorption of pollutants but also provides active sites for photocatalytic reactions. The three-dimensional space and the network interconnection structure are conducive to the directional migration of photogenerated charges and increase the carrier lifetime. In brief, this work provides a new route to the design and synthesis of CdS/CeO 2 /g-C 3 N 4 for colorless organic pollutants photodegradation under visible light.
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CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Long Sun,Lingling Li,Juan Yang,Jiajie Fan,Quanlong Xu
The fabrication of S-scheme heterojunctions has received considerable attention as an effective approach to promote the separation and migration of photoexcited electron/hole pairs and retain strong redox abilities. Herein, an imine-based porous covalent organic framework (COF-LZU1) is integrated with controllably fabricated CdS hollow cubes, resulting in the formation of an S-scheme heterojunction. When the COF content reaches 1.5 wt%, the COF/CdS heterostructure (1.5%COF/CdS) achieves the highest hydrogen generation rate of 8670 μmol·h –1 ·g –1 , which is approximately 2.1 times higher than that of pure CdS. The apparent quantum efficiency (AQE) of 1.5%COF/CdS is approximately 8.9% at 420 nm. Further systematic analysis shows that the intimate contact interface and suitable energy band structures between CdS and COF can induce the formation of an internal electric field at the heterojunction interface, which can effectively drive the spatial separation of photoexcited charge carriers and simultaneously maintain a strong redox ability, thus enhancing the photocatalytic H 2 evolution performance.
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