JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2011
·Vol. 11
·期 12
·10320-10323
·
IF 1.352
Yan Shancheng,Xu Xin,Sheng Yun,Sun Huabin,Wu Jiansheng,Tang Lihua
A novel disposable biosensor is developed based on gold nanoparticles modified CdS nanorod arrays. The ordered CdS nanorod arrays firstly have been synthesized by a simple hydrothermal method. Then, the CdS nanorod arrays are modified by gold nanoparticles, which are directly fabricated
into an electrode for detection of cytochrome c (Cyc) in solution without any pretreatment. The modified CdS nanorod arrays biosensor with the immense surface area and high electrical conductivity shows a good sensitivity and linear range. This method may be used to construct other electrochemical
biosensors using aligned nanorod/nanowire films.
研究领域:
生物传感技术
·
纳米材料科学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Junhao Cai,Yaru Peng,Po Hu,Yuan Zhou,Qiaoge Yao,Hao Lyu,Youtang Gao
The light absorption, active sites, and charge carriers separation of photocatalysts are extremely important factors in the field of photocatalysis. Near-perfect lattice-matched homojunction constructed using disorder engineering and doping strategies is an effective strategy to improve photocatalytic activity. Herein, we developed crystalline TiO 2 nanoparticles (NPs) and Ti 3 C 2 T x MXene-derived C-doped amorphous TiO x homojunction (TCT) at room temperature. In this homojunction, TiO 2 NPs are evenly distributed on the surface of the C-TiO x nanosheet to form a type-II structure, which promotes the separation of photogenerated carriers. The light absorption range of TCT extends to 550 nm due to the presence of intermediate energy levels in C-TiO x , which increases its photon absorption capacity. Moreover, TCT possesses a large number of oxygen vacancies, which are beneficial for improving the adsorption and degradation of pollutants. These characteristics of TCT could significantly improve its photodegradation performance for tetracycline. Interestingly, the precursor mass ratio of TCT with the best degradation efficiency is different under different illumination conditions, which is attributed to the different band gaps of C-TiO x and TiO 2 NPs resulting in different light absorption ranges. This work provides a new approach to rationally designing crystalline and amorphous homojunction for photocatalytic applications.
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
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Feng Hu,Jing Li,Xiaoling Peng,Shan Tao,Jingcai Xu,Bo Hong,Xinqing Wang
In this study, the novel Co/C/LaFeO 3 composites were synthesized by in-situ growth of LaFeO 3 on Co/C derived from ZIF-67. The electromagnetic wave (EMW) absorption performance of the Co/C/LaFeO 3 composites was investigated with varying proportions of Co/C and LaFeO 3 . When the weight ration of Co/C to LaFeO 3 was 2:1, the Co/C/LaFeO 3 composites exhibited a remarkable minimum reflection loss (RL min ) of −57.8 dB and demonstrated an effectively absorbing broadband (EAB, RL min ≤ -10 dB) of 5.12 GHz at 1.7 mm. Benefiting from the combined impact of Co nanoparticles, carbon layer, and LaFeO 3 , diverse interfaces and conductive networks were formed, and optimized impedance matching was obtained. In addition, the incorporation of LaFeO 3 significantly enriched the electromagnetic loss mechanisms, ultimately enhancing the comprehensive EMW absorption efficiency of the Co/C/LaFeO 3 composites. This research serves as an essential guide for designing and synthesizing MOF-derived carbon composites with significant EMW absorption capacities.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2025
·
IF 2.7
Fei Yuan,Yiyuan Xin,Caifeng Yuan,Zhuo Chen,Tongling Qin,Wenxia Hu,Jiahuan Duan,E Tang
A simple, exogenous-base-free, and NBS-mediated C-selenocyanation/cyclization reaction of enaminones with KSeCN under mild conditions, providing a facile route to 2-aminoselenazole products, has been developed. This efficient protocol is postulated to first undergo the NBS-oxidated polarity reversal of the reactive SeCN- anion to form N-selenocyanosuccinimide as an electrophilic selenium source, which can induce the C-selenocyanation of enaminones and enamino esters, followed by a nucleophilic cyclization promoted by in-situ yielded HBr.
研究领域:
有机化学
·
合成化学
·
硒化学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Pharmacology
·
2025
·
IF 4.8
Jinpeng Lv,Duo Meng,Huansha Zhang,Wenhui Xu,Xiaohong An,Chuanwei Yin,Kun Zou,Rongyin Gao
Introduction: Apigenin, a natural flavonoid with well-established antioxidant, anticancer, and anti-inflammatory activities, has recently attracted attention for its pigmentation-promoting effects. However, the underlying molecular mechanisms driving its melanogenic activity remain incompletely understood.Method: To investigate apigenin‘s effects on melanogenesis, human epidermal melanocytes (HEMCs), zebrafish embryos, and human skin explants were treated with apigenin. Melanin content, dendrite formation, and melanosome maturation were evaluated using spectrophotometry and transmission electron microscopy. Key signaling molecules and proteins involved in melanogenesis and melanosome transport were assessed by Western blotting and immunohistochemistry. The role of the c-KIT receptor was further explored through pharmacological inhibition and genetic knockdown approaches. Functional pigmentation was evaluated by assessing UVB-induced DNA damage markers.Results: Apigenin (10 μM) significantly increased melanin production by 1.8-fold in HEMCs, enhanced dendritic morphology, and promoted stage III–IV melanosome formation. Mechanistically, apigenin induced melanogenesis independently of the MC1R/cAMP/PKA pathway by directly binding to the c-KIT receptor, activating the Raf-1/ERK/RSK cascade, and upregulating MITF. This led to elevated expression of tyrosinase, TRP-1, TRP-2, and melanosome transport proteins Rab27a and Cdc42. Inhibition or knockdown of c-KIT abrogated these effects. In vivo, apigenin restored pigmentation in PTU-induced depigmented zebrafish and increased melanin content by 1.3-fold in human skin explants. Histological analysis confirmed effective melanin transfer to keratinocytes. Additionally, apigenin-treated skin showed reduced UVB-induced DNA damage, indicating enhanced photoprotection.Discussion: These findings demonstrate that apigenin stimulates melanogenesis through a novel c-KIT-dependent signaling pathway and promotes functional pigmentation with photoprotective benefits. Given its dietary origin, favorable safety profile, and multifaceted mechanisms, apigenin holds promise as a therapeutic agent for vitiligo and a natural pigmentation enhancer for dermatological use.
研究领域:
细胞生物学
·
皮肤病学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Bowen Luo,Rongxuan Li,Riyang Shu,Chao Wang,Jingtao Zhang,Ying Chen
Simple and efficient catalytic routes have been explored to upgrade the raw lignin oil. Though homogeneous catalysis is easy to operate and possesses a high reaction rate, it also suffers from the difficulty of product separation. In this work, we used H3BO3 as a novel homogeneous catalyst coupled with Ru/C to overcome the separation problem and carry out the hydrodeoxygenation (HDO) of phenolic compounds and raw lignin oil. H3BO3 showed an outstanding performance over the liquid organic and mineral acids, with a good catalyst recyclability. Phenolic model compounds including monomers and dimers can be efficiently converted into cycloalkanes with yields close to 100%. Moreover, the raw lignin oil also had a good HDO result by using this bifunctional catalyst (H3BO3 and Ru/C). The content of hydrocarbons increased from 7.9% to 93.1% at 260 °C, which promoted the upgraded lignin oil capable to be used as fuel directly.
研究领域:
化学工程
·
可再生能源
✓ 已验证
DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2024
·
IF 10.9
Binmeng Chen,Xu Fang,Yuyang Zhao,Zongjin Li
In recycling and reusing construction waste, carbonation of recycled concrete fine (RCF) has been successfully applied to produce value-added products, such as silica nanoparticles, via the breaking of calcium silicate hydrate (C-S-H) structure and condensation of silicate chains. However, the intricacies of carbonation of RCF with varying calcium to silicon (C/S) ratios and their implications on the size of generated silica nanoparticles remain unknown. In this work, we developed an optimized carbonation method at high water to solid ratio to fabricate silica nanoparticles from C-S-H with different C/S ratios. The particle size of silica nanoparticles was found to gradually decrease with the increased C/S ratio of C-S-H. Since as C/S ratio increased, silicate in Q 3 state shifted to Q 1 state and the silicate chain became shorter, shifting from long-range, disordered to short-range, ordered. As the disordered self-seeding growth of long silicate chains derived from C-S-H continued, the Si-O-Si network of silica nanoparticles became chaotic, leaving more unreacted Si-OH on its surface. On the contrary, the short silicate chains displayed higher possibility of condensation, making nanoparticles with a smaller diameter.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Haochuan Wang,Xin Liu,Chong Wang,Wei Wang,Jinxiang Hong,Pan Feng
Ultra-early mechanical properties are critical for shotcrete performance, significantly influenced by ettringite and calcium silicate hydrate (C-S-H) formed during the initial hydration stage and free water. This study investigates the individual and synergistic effects of these phases on mechanical behavior using equivalent cement pastes. In this system, cement was entirely replaced with dolomite particles of matching size distribution, with the controlled introduction of free water, ettringite, and C-S-H. The validity of these equivalent systems was confirmed through comprehensive characterization. Mechanical performance was subsequently evaluated using compression, shear, Vickers hardness and nanoindentation tests. Results revealed that free water remarkably weakened the mechanical properties, whereas both ettringite and C-S-H enhanced strength by reducing voids and reinforcing weak particle interfaces. Ettringite primarily contributed to interparticle friction, while C-S-H enhanced cohesion at interfaces including dolomite-dolomite, dolomite-ettringite and ettringite-ettringite contacts. When co-existing, C-S-H formed within the porous ettringite network, not only establishing a multi-scale filling structure but also stabilizing the dolomite-ettringite skeleton. These findings advance our understanding of the early-age mechanical development of shotcrete and highlight the potential of equivalent cement systems as robust tools for research into cementitious materials.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 148
·期 11
·3445-3453
·
IF 2.911
Li Xia,Dong Hao,Wang Bo,Lv Jun,Xu Guangqing,Wang Dongmei,Wu Yucheng
Firstly, h-CdS/c-CdS homojunction was prepared by solvothermal method with controlling the Cd-to-S molar ratio. Then, the MoS 2 /h-CdS/c-CdS nanocomposites were constructed by ultrasonic method with different MoS 2 amount. The experimental results showed that when the molar ratio of Cd and S was 1:1 and the amount of MoS 2 was 1.5 wt%, the MoS 2 /h-CdS/c-CdS nanocomposites exhibited excellent photocatalytic performance for hydrogen evolution under visible light. The total amount of hydrogen evolution was 3753.12 µmol for 5 h, and its average hydrogen evolution rate was 40.79 mmol h −1 g −1 with an apparent quantum efficiency of 38.16% irradiated at 420 nm, which was about 7.3 times when compared with the h-CdS/c-CdS homojunction (Cd:S = 1:8). The enhanced photocatalytic performance of MoS 2 /h-CdS/c-CdS could be attributed to the improved specific surface area and formation of well bonded interface structure, which not only enhanced the response to visible light but also decreased the recombination rates of photogenerated charge carriers. Graphical Abstract
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
Sensor Letters
·
2016
·Vol. 14
·期 9
·859-863
·
IF 0
Ding Yu,Li Yibin,Wu Huimin,Wang Shengfu,Xia Qinghua
20 wt% PtFe/C catalysts were prepared by a chemical reduction method at high temperature. The catalysts were characterized by X-ray diffraction, transmission electron microscopy, and electrochemical testing. The sensor based on PtFe/C showed a detection limit of 0.03 mM and high
sensitivity with linear range from 0.1 mM to 13.5 mM. The sensor still had high selection for glucose in the presence of commonly interfering species, such as ascorbic acid, acetamidophenol, and uric acid. The as-prepared glucose sensor has good anti-interference performance.
研究领域:
材料科学
·
电化学
·
生物传感
✓ 已验证
DOI
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Wei Ji,Guofeng Liu,Zijian Li,Chuanliang Feng
For CH···O hydrogen bonds in assembled structures and the applications, one of the critical issues is how molecular spatial structures affect their interaction modes as well as how to translate the different modes into the macroscopic properties of materials. Herein, coumarin-derived isomeric hydrogelators with different spatial structures are synthesized, where only nitrogen atoms locate at the ortho, meso, or para position in the pyridine ring. The gelators can self-assemble into single crystals and nanofibrous networks through CH···O interactions, which are greatly influenced by nitrogen spatial positions in the pyridine ring, leading to the different self-assembly mechanisms, packing modes, and properties of the nanofibrous networks. Typically, different cell proliferation rates are obtained on the different CH···O bonds driving nanofibrous structures, implying that tiny variation of the stereo-position of nitrogen atoms can be sensitively detected by cells. The study paves a novel way to investigate the influence of isomeric molecular assembly on macroscopic properties and functions of materials.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiao Liu,Jinhu Hu,Xukang Han,Zhenyu Sheng,Yonglei Chi,Fangjiang Chi,Mingliang Ma
The rapid expansion of 5 G technology and the proliferation of electronic devices have exacerbated electromagnetic radiation pollution of urban building space and pose significant risks to human health, necessitating the development of efficient electromagnetic wave (EMW) absorbing materials for use in buildings to address this challenge. Carbon nanotubes (CNT) and magnetic materials such as Fe are widely used in this field due to their unique electromagnetic properties. In this study, γ-Fe 2 O 3 /C/CNT magnetic nanofibers were successfully prepared, exhibiting synergistic di-electric and magnetic capabilities through electrospinning and mechanical blending methods. Compared to γ-Fe 2 O 3 /C fibers and CNT, the CNT-modified composite material exhibited superior EMW absorption performance. At a low loading of 15 wt %, the γ-Fe 2 O 3 /C/CNT composite fibers achieved a minimum reflection loss (RL min ) of -78.89 dB (2.61 mm) and an effective absorption bandwidth (EAB) of 4.12 GHz (1.52 mm, 13.6-17.72 GHz). The superior EMW absorbing performance is primarily attributed to the three-dimensional network structure created by the intertwined nanofibers and CNT, through the synergy of two one-dimensional structures, which achieved good impedance matching and multiple loss mechanisms. As high-efficiency absorbing agents, γ-Fe 2 O 3 /C/CNT magnetic nanocomposite fibers have broad application prospects, serving as low-loading polymer coatings and cement-based materials absorbent to absorb radiation from electronic devices within buildings, reducing indoor electromagnetic pollution, and they can also be used in the field of military stealth. This work provides new insights into the development of efficient EMW absorbing materials.
研究领域:
材料科学
·
环境科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）