JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xiaoyun Dong,Huimin Hao,Ningning Wang,Hong Yuan,Xianjun Lang
Semiconductor photocatalysis can carry out selective chemical transformations under ambient conditions, mitigating the associated environmental consequences. However, a single semiconductor photocatalyst usually cannot perform the transformations satisfactorily from the aspects of light-absorption, efficiency, and selectivity , etc. To address these challenges, cadmium sulfide (CdS)/titanate hybrid was fabricated by simultaneously growing titanate and CdS and had been comprehensively characterized. The optimized CdS/titanate hybrid can power the highly selective oxidative homocoupling of amines under the irradiation of green light-emitting diodes (LEDs). Specifically, CdS with a narrow bandgap captures green light; the conduction band of titanate activates molecular oxygen (O 2 ). The valence band of CdS could ensure the selective oxidative homocoupling of amines in methanol (CH 3 OH). The hybridization between CdS and titanate accounts for the expeditious oxidative homocoupling of amines into imines and the improved stability. Reactive oxygen species (ROS) quenching experiments and in situ electron paramagnetic resonance (EPR) tests suggest that superoxide anion (O 2 − ) and benzylamine radical are intermediates en route to imines. This work highlights the viability of hybridization of dual semiconductor nanostructures in implementing visible light-powered selective conversions.
研究领域:
材料科学
·
环境化学
·
半导体技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Hong-Gang Ye,Xuan Lu,Rui Cheng,Jiazhuang Guo,He Li,Cai-Feng Wang,Su Chen
Bottom-up methods allowing the preparation of carbon dots (CDs) with favorable attributes are highly desirable. Herein, we report the mild bottom-up synthesis of CDs towards temperature sensing. Five kinds of CDs with blue or green fluorescence were synthesized in water or tetrahydrofuran (THF) under moderate conditions (normal pressure, 50~95 °C), with use of carbonyl compounds as carbon sources, such as acetylacetone (AA), cyclohexanone (CH), 2-hydroxy-2-methylpropiophenone (HM), glutaric dialdehyde (GD), and salicylaldehyde (SA). Typically, with use of acetylacetone (AA) as carbon sources, CDs were synthesized at 95 °C in water in the presence of zinc chloride and 1, 2-dichloroethane. The synthesis, characterizations, and optical properties of AA-derived CDs were thoroughly investigated. The resultant CDs exhibit green photoluminescence (PL) at 520 nm with absolute PL quantum yield (QY) of 21%. Moreover, the PL intensity proportionally depends on temperature in the range 150–360 K, which makes AA-derived CDs potentially useful for temperature sensing.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2018
·
IF 3.789
Haiquan Zhao,Dongsheng Wang,Yue Fan,Mingrui Ren,Shumin Dong,Yonghao Zheng
In this report, we designed surfaces with reversible green-light-switched wettability via donor–acceptor Stenhouse adducts (DASAs). Photoresponsive micro/nanoparticles were prepared by coating the surfaces of silica micro/nanoparticles with polydopamine and then postmodifying with DASA molecules. Then, the particles were immobilized on a glass substrate surfaces either with double-sided adhesive tape or cross-linking poly(dimethylsiloxane). Silica micro/nanoparticles with various diameters (0.2, 2.5, and 85 μm) were used to fabricate the photoresponsive surface. Green light irradiation switches the hydrophobic linear DASA to a hydrophilic cyclic isomer, which further increases the wettability and contact angle hysteresis on the surface. On the other hand, heating (100 °C) induces the cyclic-to-linear isomerization of DASA molecules and switches the surface back to hydrophobic. The wettability of the DASA-modified surface is reversible under alternate green light irradiation and heating.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Guannan Chen,Mingli Ni,Haiyan Peng,Feihong Huang,Yonggui Liao,Mingkui Wang,Jintao Zhu,V. A. L. Roy,Xiaolin Xie
Holographic photopolymer composites have garnered a great deal of interest in recent decades, not only because of their advantageous light sensitivity but also due to their attractive capabilities of realizing high capacity three-dimensional (3D) data storage that is long-term stable within two-dimensional (2D) thin films. For achieving high performance holographic photopolymer composites, it is of critical importance to implement precisely spatiotemporal control over the photopolymerization kinetics and gelation during holographic recording. Though a monochromatic blue light photoinitibitor has been demonstrated to be useful for improving the holographic performance, it is impractical to be employed for constructing holograms under green light due to the severe restriction of the First Law of Photochemistry, while holography under green light is highly desirable considering the relatively low cost of laser source and high tolerance to ambient vibration for image reconstruction. Herein, we disclose the concurrent photoinitiation and inhibition functions of the rose bengal (RB)/N-phenylglycine (NPG) system upon green light illumination, which result in significant enhancement of the diffraction efficiency of holographic polymer-dispersed liquid crystal (HPDLC) gratings from zero up to 87.6 ± 1.3%, with an augmentation of the RB concentration from 0.06 × 10–3 to 9.41 × 10–3 mol L–1. Interestingly, no detectable variation of the ϕ1/2kp/kt1/2, which reflects the initiation efficiency and kinetic constants, is given when increasing the RB concentration. The radical inhibition by RBH• is believed to account for the greatly improved phase separation and enhanced diffraction efficiency, through shortening the weight-average polymer chain length and subsequently delaying the photopolymerization gelation. The reconstructed colored 3D images that are easily identifiable to the naked eye under white light demonstrate great potential to be applied for advanced anticounterfeiting.
研究领域:
材料科学
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光学工程
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产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 17
·2200836
·
IF 10.05
Hexin Chen,Tuan Lin,Fan Huang,Shuxing Li,Xueyuan Tang,Rong-Jun Xie
Green light is generally used as the transmitter of underwater wireless optical communication (UWOC) system, but the currently available light-emitting diode (LED)-based green light has a poor luminous flux density (i.e., low brightness) and a low wall-plug efficiency (WPE), known as the “green gap”. In this work, it is proposed to produce the laser-driven green light by using blue laser diodes to pump the narrow-band green-emitting β-Sialon phosphor-in-glass (PiG) film. The dominant wavelength of the laser-driven green light can be tuned in the range of ≈520–540 nm, required for UWOC, by controlling the phosphor content at ≈60–80% and the film thickness at ≈150–185 µm. By introducing highly reflective TiO 2 into the PiG film, the laser-driven green light exhibits a maximum luminous flux density of 1260 lm mm −2 under blue laser excitation with a power density of 15.49 W mm −2 . For UWOC application, the green light is demonstrated to have a modulation bandwidth of 1.76 MHz, a high WPE of 8.7%, and a long transmission distance of ≈61.6 m. This work suggests that the laser-driven high-brightness green light will be a promising light source for UWOC.
研究领域:
光学
·
通信工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qingfeng Dong,Ruojian Gao,Xiaofang Liu,Li Li
In this study, photobactericidal films exhibiting excellent antibacterial activity upon irradiation under green light (530–545 nm) were prepared by incorporating erythrosine B (EB) into ethyl cellulose (EC) film. The results of Fourier-transform infrared spectra illustrated that the EB was successfully encapsulated in the films. Additionally, the EC/EB films exhibited a semi-transparent magenta hue with some UV blocking properties. As the amount of EB added to the EC films increased the tensile strength decreased from 22.79 MPa to 9.09 MPa, and the elongation at break increased from 8.20 % to 30.80 %. Under green light irradiation, the EC/EB films showed strong antibacterial activity (> 99 % bacteriostasis rate for Staphylococcus aureus and Escherichia coli ). Research on antibacterial mechanisms implied that the reactive oxygen species generated via photochemical pathways, caused damage to the bacterial cell membrane, leading to the leakage of substances within the bacterial cells and ultimately resulting in the death of the bacteria. Finally, the EC/EB films were applied to the preservation of salmon fillets, and the results showed the EC/EB films could significantly inhibit the growth of spoilage bacteria, thereby extending the shelf life by 2–3 days. Therefore, the prepared photobactericidal films have more potential for application in aquatic products preservation.
研究领域:
食品科学
·
材料科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Xiangdong Cao,Junsheng Hong,Zhonglei Zhang,Junda Li,Jihua Tang,Jiaqi Wang,Duo Yi,Xuejin Li,Yu Du,Xiaoqing Tian
Flower-like zinc oxide nanoclusters were successfully incorporated by different amount of PTCDA organic dye molecular, forming the hetero-structured PTCDA/ZnO composites. Remarkably, a study performed on their NO 2 sensing properties reveals that the 0.5 wt% PTCDA-loaded ZnO sensor exhibits high response, excellent selectivity, quick response speed and low detection limit of 7.4 ppb towards NO 2 molecules at room temperature (25 °C) under green light illumination, which possesses an apparent advantage over the ZnO sensors loaded with other PTCDA concentration as well as upon other light illumination conditions . This work makes a meaningful contribution to the development of NO 2 sensor based on wide-band gap semiconductors with visible light irradiation .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2023
·Vol. 6
·期 5
·1380-1391
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IF 4.7
Yuanhang Fan,Zhenyu Zhang,Jiaxin Yu,Xingqiao Deng,Chunjing Shi,Hongxiu Zhou,Fanning Meng,Junyuan Feng
High-performance devices of quartz glass demand an atomic surface, which induces a challenge for chemical mechanical polishing (CMP) with a high material removal rate (MRR). Moreover, traditional CMP usually employs toxic and corrosive slurries, leading to the pollution of the environment. To overcome these challenges, a novel green photocatalytic CMP is proposed. In the CMP, SiO2@TiO2 core–shell abrasives were developed, and the CMP slurry included the developed abrasives, sodium carbonate, hydrogen peroxide and sorbitol. After photocatalytic CMP, the surface roughness Sa of quartz glass is 0.185 nm, with a scanning area of 50 × 50 μm2, and the MRR is 8.64 μm h−1. To the best of our knowledge, the MRR is the highest on such a big area of atomic surface for quartz glass. X-ray photoelectron spectroscopy reveals that SiO2@TiO2 core–shell abrasives were used as photocatalysts motivated by simulated solar light, generating electrons and holes and producing hydroxyl radicals through hydrogen peroxide. As a result, OH− could combine with Si atoms on the surface of quartz glass, forming Si–OH–Si bonds. Then the formed bonds were removed based on the balance between chemical and mechanical functions. The proposed CMP, developed SiO2@TiO2 abrasives and slurry provide new insights to achieve an atomic surface of quartz glass with a high MRR.
研究领域:
材料科学
·
环境科学
·
表面工程
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 22
·2101639
·
IF 6.147
Honglei Chen,Ting Shen,Yu-Tang Li,Xiaolan Chen,Hao-Cheng Yang,Weihua Li
Photothermal materials as well as their forms and structures play a crucial role in the performance and applications of solar-driven devices. There is a growing demand for low-cost, easy-to-shape, and eco-friendly photothermal materials to meet sustainable development. Therefore, a green photothermal ink with excellent photothermal capacity and highly accessible via Chinese ink and alginate is proposed. This photothermal ink can be easily fabricated and shaped into 0D to 3D (e.g., granules, fibers, films/felts, and sponges) solar-driven devices by simple processes. Among them, the photothermal sponge displays excellent evaporation performance in solar desalination with an evaporation rate of 1.44 kg m −2 h −1 under one solar irradiation. The photothermal felt can accelerate ice melting and absorb the melted ice and prevent the substrate from freezing again. The photothermal granules can capture the moisture from the humid air and release the absorbed water under sunlight. The present photothermal ink provides a good strategy for solar-driven devices in different practical applications.
研究领域:
材料科学
·
环境科学
·
能源科学
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产品关联
DOI
高影响因子
Plasmonics
·
2015
·Vol. 11
·期 2
·619-625
·
IF 2.238
Luo Lin-Bao,Zheng Kun,Ge Cai-Wang,Zou Yi-Feng,Lu Rui,Wang Yuan,Wang Dan-Dan,Zhang Teng-Fei,Liang Feng-Xia
Light manipulation is vitally important for one-dimensional semiconductor nanostructure-based photodetectors which have great potential in future optoelectronic circuits, imaging technique, and light-wave communication. In this paper, we reported a plasmonic gold nanoparticle (AuNP)-decorated nano-photodetector for green light sensing. It is found that the as-fabricated device exhibits obvious increase in light absorption in the range from 400 to 550 nm, after functionalization of plasmonic AuNPs. Further device performance analysis reveals that the photocurrent of the plasmonic photodetector was increased by more than sevenfold, compared with that without coating. What is more, both responsivity and detectivity are found to increase as well. According to theoretical simulation based on the finite element method (FEM), the observed enhancement in device performance can be attributed to the surface plasmon-induced direct electron injection from the metal nanoparticles to the semiconductor nanostructures.
研究领域:
光学
·
纳米技术
·
光电子学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 7
·2101-2107
·
IF 5
Jianhao Qiu,Lu Zhang,Guanglu Xia,Dingliang Dai,Yong Tang,Jianfeng Yao
Different ligand functionalized UiO-66 (UiO-66-X, X = OH, (OH)2 and NH2) were prepared and then modified by ZnIn2S4 lamellas to form ZnIn2S4/UiO-66-X heterostructures for visible-light-driven H2O2 evolution in pure water. The H2O2 yields using ZnIn2S4/UiO-66-NH2, ZnIn2S4/UiO-66-(OH)2 and ZnIn2S4/UiO-66-OH are 799, 733 and 165 μmol L−1, respectively, which are 9.5, 8.7 and 2.0 times that of ZnIn2S4/UiO-66. The high performance of ZnIn2S4/UiO-66-NH2 and ZnIn2S4/UiO-66-(OH)2 is ascribed to the benign visible-light response and Z-scheme heterostructures, and the H2O2 evolution abides by indirect O2 reduction with ˙O2− as an intermediate species. Additionally, H2O2 yields using ZnIn2S4/UiO-66-NH2 on tap water and Xuanwu Lake (Nanjing, China) water can be comparable to that on the above-deionized water. This study sheds light on the great promise of functionalized MOFs and their applications on green (photo)catalytic energy conversion.
研究领域:
材料科学
·
光化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Materials
·
2022
·
IF 3.985
Cao Ying,Li Wenjiao,Quan Fengyu,Xia Yanzhi,Xiong Zhong
Light-responsive hydrogel actuators show attractive biomedical applications for in vivo drug delivery tool, surgical tissue repair operation, and vascular cleaning due to its non-contact, rapid, precise, and remote spatial control of light. Conventional visible–light–responsive hydrogels contain special chemical structure or groups, and the difficulty in synthesis results in that few can be applied to fabricate visible–light–driven hydrogel actuators. In this study, based on photothermal effect, surface-modified Fe3O4 nanoparticles were incorporated into poly(N-isopropylacrylamide-acrylamide) hydrogel by UV photopolymerization, which revealed excellent green–light–responsive volume change. Under a laser irradiation of 200 mW at 520 nm, the bending angle deformation of hydrogel strips with 2.62 wt% Fe3O4 reached 107.8°. Strip-shaped hydrogel actuators could be applied to transport tiny objects. Furthermore, a boomerang-like hydrogel actuator was designed and fabricated to drive floating foam on water. By 12 cycles of continuous laser on–off irradiation to a hydrogel actuator underwater, a circular returning movement of the float was accomplished. The study on driving a float using visible–light–triggered hydrogel actuators provides a new idea for the design of light-driven biomedical devices and soft robots.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
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