JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Chun-Hui Gao,Shi-Ming Zhang,Fang-Fang Feng,San-San Hu,Qian-Fan Zhao,Yong-Zheng Chen
Visible-light-driven nicotinamide adenine dinucleotide (NADH) regeneration is one of the most effective measures, and cadmium sulfide (CdS) materials are typically used as low-cost photocatalysts. The CdS photocatalysts, however, still suffer from low regeneration efficiency and poor cycle stability. In this work, the CdS quantum dots (QDs) less than 10 nm embedded onto silica gel (CdS QDs/Silica gel) were constructed for visible-light-driven NADH regeneration by a successive ionic layer adsorption reaction and ball milling method. Results demonstrate that the photosensitivity of the CdS QDs/Silica gel composite was 31 times higher than that of the bulk CdS. Moreover, the conduction band (CB) edge of the CdS QDs/Silica gel composite is −1.34 eV, which is more negative 0.5 eV than that of the bulk CdS. The obtained CdS QDs/Silica gel composites showed the highest NADH regeneration yields of 68.8% under visible-light (LED, 420 nm) illumination and can be reused for over 40 cycles. Finally, the bioactivity of NADH toward enzyme catalysis is further confirmed by the hydrogenation of benzaldehyde to benzyl alcohol catalyzed with an alcohol dehydrogenase as enzyme catalysis.
研究领域:
生物化学
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Dandan Ma,Diankun Sun,Yajun Zou,Siman Mao,Yixuan Lv,Yao Wang,Jun Li,Jian-Wen Shi
A series of dandelion-like Fe-CeO 2 /CdS (FeCe x /Cd y ) nanoflowers with different molar ratios of Fe-CeO 2 to CdS are synthesized by solvothermal method for the first time. The FeCe x /Cd y nanoflowers are assembled by a large number of nanoparticles with the diameter of about 3 nm, and the introduction of Fe ions and the couple of CdS quantum dots (QDs) efficiently enhanced the relative percentage of Ce 3+ in CeO 2 . The as-obtained FeCe 1 /Cd 1 heterostructure exhibits the highest photocatalytic H 2 evolution ability of 108.9 μmol/h, which is 20.5, 6.1 and 7.1 times higher than CeO 2 , Fe-CeO 2 and CdS, respectively. This significantly enhanced photocatalytic performance can be mainly attributed to the synergy between the electronic anchoring effect of Fe 3+ /Fe 2+ and Ce 4+ /Ce 3+ redox couples and the internal electric field constructed by the II-type heterojunction between Fe-CeO 2 and CdS. This work provides a new idea for the design of efficient photocatalysts by combining the advantages of heterostructure and ion anchoring effect.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2011
·Vol. 13
·期 12
·6661-6672
·
IF 3.253
Zhou Qiang,Fu Ming-Lai,Yuan Bao-Ling,Cui Hao-Jie,Shi Jian-Wen
The semiconductor quantum dots (QDs) can be very efficient to tune the response of photocatalyst of TiO 2 to visible light. In this study, CdS QDs formed in situ with about 8 nm have been successfully deposited onto the surfaces of TiO 2 nanotubes (TNTs) to form TNTs/CdS QDs nanocomposites by use of a simple bifunctional organic linker, thiolactic acid. The diffuse reflectance spectroscopy (DRS) spectra of as prepared samples showed that the absorption edge of the TNTs/CdS composite is extended to visible range, with absorption edge at 530 nm. The photocatalytic activity and stability of TNTs/CdS were also evaluated for the photodegradation of rhodamine B. The results showed that when TNTs/CdS QDs was used, photocatalytic degradation of RhB under visible light irradiation reached 91.6%, higher than 45.4 and 30.5% for P25 and TNTs, respectively. This study indicated that the TNTs/CdS QDs nanocomposites were superior catalysts for photodegradation under visible light irradiation compared with TNTs and P25 samples, which may find wide application as a powerful photocatalyst in environmental field.
研究领域:
材料科学
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环境化学
·
纳米技术
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光催化
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表面工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 10
·9363-9371
·
IF 2.195
Xue Xiangxin,Chen Lei,Zhao Cuimei,Wang Hairui,Nie Ping,Chang Limin
In this paper, the photocatalytic behavior of CdSe/CdS quantum dots (QDs) in reducing the graphene oxide (GO) with different surface ligands was investigated. Here, three surface ligands of different functional groups (oleic acid, poly (acrylic acid polymers) and S 2− ) were selected to study the influence of surface ligands on photocatalytic behavior of the CdSe/CdS QDs. Meanwhile, the obtained samples can be used as photocatalyst, and the photocatalytic activity was evaluated by photodegrading a methylene blue solution. It turned out that the QDs–S 2− –GO sample showed the highest photocatalytic activity under visible-light irradiation. Different surface ligand has different influence on the charge separation efficiency, which has different influence on photocatalytic behavior. The results show that the photocatalytic behavior is highly dependent on the electron attracting ability of the surface ligands on the CdSe/CdS QDs. Finally, a possible photocatalytic mechanism is proposed.
研究领域:
材料科学
·
光催化
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 2
·2113-2126
·
IF 2.478
Li Xinxin,Xu Jinku
The widespread application of white light-emitting diodes makes us surrounding by plenty of blue-rich light, promoting the development of blue-light-blocking filters because blue light between 415 and 455 nm wavelength can cause light damage to the retina cells. While longer wavelength blue light is also essential to trigger physiological responses, which puts forward higher requirements for the precise blue-light-blocking ability of the filters. In this paper, CdS quantum dot (QD) with strong absorption in the blue region was synthesized and its size was regulated by extended reaction time. Polymerizable molecule was chemically grafted on CdS surface and then copolymerized with methyl methacrylate (MMA) monomer for transparent films with a narrow absorption transition band (wavelength span from 0.05 to 0.8 T max ) about 20 nm and tunable cut-off wavelength at 0.05 T max from 436.9 to 447.8 nm due to quantum size effect of CdS QD. This provides a possibility for more accurate adjustment of the blue-light-blocking performance, minimizing the harmful visual damage of short-wave blue light and preserving the beneficial physiological effects of long-wave blue light.
研究领域:
材料科学
·
光学
·
生物医学
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DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Tang Xiaosheng,Yang Jie,Li Shiqi,Chen Weiwei,Hu Zhiping,Qiu Jing
Novel CsPbBr3/CdS core/shell structure quantum dots (QDs) were successfully synthesized using a facile hot-injection method. The corresponding CsPbBr3/CdS QDs based light-emitting diodes (QLEDs) were further prepared, which demonstrated the maximum luminance of 354 cd/m2 and an external quantum efficiency (EQE) of 0.4% with the current efficiency (CE) of 0.3 cd/A. Moreover, the optoelectronic performance of the CsPbBr3/CdS QDs based QLEDs exhibited a comparable enhancement in contrast to the pure CsPbBr3 QDs based QLEDs. Hypothetically, the novel CsPbBr3/CdS structure QDs introduced one new route for advanced light emission applications of perovskite materials.
研究领域:
材料科学
·
光电子学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 12
·1-16
·
IF 2.101
Li Zhenzhen,Zhang Qiyi,Huang Huaying,Ren Changjing,Pan Yujin,Wang Qing,Zhao Qiang
In the experiments, high-quality, water-soluble and near-infrared (NIR)-emitting CdSeTe and CdSeTe/CdS quantum dots (QDs) were successfully prepared. The average size of CdSeTe⁄CdS QDs was 7.68 nm and CdSeTe QDs was 4.33 nm. Arginine-glycine-aspartic-serine acid (RGDS) peptides were linked to CdSeTe/CdS QDs by N-(3-(dimethylamino)propyl)-N′-ehtylcarbodiimide hydrochloride (EDC) and N′-hydroxysuccinimide (NHS). The prepared RGDS-tagged NIR CdSeTe/CdS QDs (denoted as RGDS-CdSeTe/CdS) had an average diameter of 24.83 nm and were used for cancer cell immunofluorescence imaging. The characteristics of RGDS-conjugated CdSeTe/CdS such as morphology, structure, spectra, stability, cytotoxicity, and near-infrared microscopic imaging were investigated in detail. HepG2 cells were incubated with the novel fluorescent probe (RGDS-CdSeTe/CdS), which realized immunofluorescence targeting and imaging. The results reported here open up new perspectives for integrin-targeted near-infrared imaging and may aid in tumor detection including imaging-guided surgery.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
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DOI
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2022
·Vol. 42
·期 8
·787-793
·
IF 1.624
Zhiyi Zhang,Zhichun Li,Fengbo Zhu,Lan Jia,Yudong Wang,Jingxin Zhu,Yanlong Ma,Hongwei He,Yuyuan Fan,Ying Zhang,Pengfei Fei,Yu Feng
Polyacrylonitrile (PAN) was often used as a composite fiber matrix due to its good spinning characteristics. Herein, photoluminescent quantum dot-doped nanofibers with tunable diameters were successfully prepared using electrospinning by adding CdSe/CdS quantum dots (QDs) in PAN spinning solution. The morphology and structure of CdSe/CdS-PAN nanofibers were characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR), and the mechanical and photoluminescent properties of CdSe/CdS-PAN nanofibers were investigated. Stable photoluminescent nanofibers were obtained owning to the improved stability of photoluminescent property of CdSe/CdS QDs in the PAN nanofiber. The stable photoluminescent CdSe/CdS-PAN nanofibers might be used for anti-fake labels, ultraviolet sensors, smart textiles and optoelectronic devices.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yu Qiao,Jinniu Zhang,Jia Liu,Yumeng Liu,Xinlei Zhang,Zhibo Yang,Xiaoqiang Yin,Jianzhi Gao,Chunlan Wang,Hongbing Lu
NO 2 is one of the most important atmosphere pollutants, causing great harm to the human body at very low concentrations (ppb levels). Herein, a novel fabrication idea for gas sensing materials was reported to detect ppb-level NO 2 via MOF-derived porous In 2 O 3 nanospheres (NSs) sensitized by CdS quantum dots (QDs). The good distribution of CdS QDs (2.5–4.0 nm) on porous In 2 O 3 NSs was verified by the transmission electron microscopy and element mapping analyses. In comparison to In 2 O 3 NSs, the CdS@In 2 O 3 composite nanospheres (CNSs) exhibited exceptional responses to ppb-level concentrations of NO 2 ( S =425.1@100 ppb) at room temperature (RT, 25 °C), while also demonstrating good selectivity and response reproducibility. These improvements in sensing performance were attributed to the synergies of the electronic effects of CdS QDs, MOF-derived porous nanostructures , and enhanced adsorption of NO 2 and active O 2 – by well-dispersed CdS QDs. This work emphasizes that the MOF-derived In 2 O 3 porous NSs sensitized by CdS QDs can accurately detect ppb-level concentrations of the NO 2 at RT.
研究领域:
材料科学
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环境科学
·
纳米技术
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Shengjun Li,Zeng Chen,Tao Li,Huiping Gao,Chaochao Wei,Wei Li,Wenping Kong,Weifeng Zhang
Employing vertical nanosheet-structured films as photoanodes of quantum dot sensitized solar cells (QDSCs) might provide a direct pathway for the photo-exited electrons. Here, the vertical ZnO, ZnO/TiO 2 and TiO 2 nanosheet-structured films were prepared by a feasible deposition processes . These films were sensitized with CdS quantum dots and assembled with CuS counter electrodes to fabricate QDSCs. The photoelectric properties of ZnO/TiO 2 composite films were superior to both pure ZnO and TiO 2 films. The effects of TiO 2 coating were investigated using electrochemical impedance spectroscopy (EIS). It was found that the photo-excited electron lifetimes in the photoanode were significantly improved with TiO 2 layer. The optimum power conversion efficiency was about 1.95% under AM 1.5 G illumination (100 mW cm −2 ), with a short circuit current density, open circuit voltage, and fill factor of 6.11 mA cm −2 , 0.562 V and 0.57, respectively.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Zhiqing Yang,Yi Wang,Dun Zhang
New approach for fabrication of photoelectrochemical sensing platform has been demonstrated for sulfate-reducing bacteria (SRB) detection based on biosynthesis of CdS quantum dots (QDs) sensitizing ZnO nanorod arrays. ZnO nanorod arrays were synthesized on the FTO substrate via galvanic-cell-based approach and then silanized by (3-Aminopropyl)triethoxysilane (APTES) with amino groups to introduce Cd 2+ . By taking advantage of the characteristic bacterial metabolite (H 2 S) reaction with Cd 2+ , CdS QDs can be biosynthesized on the surface of ZnO nanorod and significant enhancement of photocurrent due to the formation of CdS/ZnO heterostructures. The fabricated PEC sensing platform showed detection sensitivity of 32 cfu/mL for SRB. The current work can provide new strategies to construct advanced PEC sensing platforms for detections of physiologic messenger molecules (H 2 S).
研究领域:
生物技术
·
材料科学
·
环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Haiyan Wang,Pei Liu,Wenjing Jiang,Xue Li,Huanshun Yin,Shiyun Ai
DNA methylation is one of the important epigenetics events, and it is responsible for transcription, genomic imprinting and cellular differentiation. Aberrant DNA methylation is always contacted with various diseases. Herein, a simple and low-cost photoelectrochemical (PEC) biosensing method is proposed for detection of DNA methylation, assay of DNA methyltransferase (MTase) activity and screening of MTase inhibitor, which is based on M. SssI MTase- HpaII endonuclease system. The graphite-like C 3 N 4 (g-C 3 N 4 ) and CdS quantum dots (CdS QDs) are used as photoactive materials. After the double-stranded DNA (dsDNA) was treated with M. SssI MTase in the presence of S -adenosylmethionine, the methylated dsDNA cannot be digested by HpaII endonuclease and dithiol group at the terminal of dsDNA can be retained. As a result, CdS QDs could be coupled successfully with methylated dsDNA between the reaction of CdS QDs with dithiol of dsDNA, achieving the amplification of PEC response. Thus, the photocurrent of PEC biosensor is consistent with the M. SssI activity. The increased photocurrent was in proportion to M. SssI activity in the linear range from 1 to 80 U/mL with a detection limit of 0.316 U/mL. Furthermore, the effects of atrazine and azamethipos on M. SssI MTase activity were investigated, which might provide useful information on carcinogenic mechanism of pesticide. The PEC biosensor has potential to screen of DNA MTase inhibitor, providing valuable information for anti-cancer drug research and also for cancer therapy.
研究领域:
生物化学
·
分子生物学
·
分析化学
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产品关联
DOI
高影响因子
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