LANGMUIR
·
2022
·
IF 4.331
Yibo Ao,Jinqing Ao,Ling Zhao,Liwei Hu,Fengsheng Qu,Biao Guo,Xue Liu
Cu(OH)2 nanomaterials are widely investigated for non-enzymatic glucose sensors due to their low-cost and excellent performance. Cu(OH)2 nanomaterials usually grow on substrates to form sensor electrodes. Reported works mainly focus on structure adjusting of the Cu(OH)2 nanostructures, while the optimization of substrates is still lacking. In the present work, directional porous Cu (DPC) was applied as the substrate for the growth of Cu(OH)2 nanograss (NG), and hierarchical structures of Cu(OH)2@DPC were prepared by alkaline oxidation. The morphology and microstructure evolution of the prepared hierarchical structures was investigated, and the non-enzymatic glucose sensing performance was evaluated. Cu(OH)2@DPC exhibits enhanced comprehensive non-enzymatic glucose sensing performance compared to the reported ones, which may benefit from both the effective adsorption of the Cu(OH)2 NG with a relatively high surface area and the high solute exchange of the DPC by a channel effect. This work provides new insights into the further improvement of the non-enzymatic glucose sensing performance of Cu(OH)2 nanostructures by optimizing the substrate structure.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 41
·19915-19926
·
IF 3.925
Xuhong Jiang,Mengmeng Sun,Zhuoyuan Chen
Clean and sustainable photoelectric technology has been developed rapidly in many fields. One of which is the novel marine corrosion protection technology that directly utilizes the abundant solar energy falling on the ocean to provide photoinduced cathodic protection for metallic structures, and has received increasing attention year by year. Improving the photoelectrochemical conversion and photoelectric cathodic protection performance for metals under sunlight is vital for achieving effective protection. In particular, optimizing the multi-dimensional nanostructured photoanode to accelerate the collection and transfer of photogenerated electrons and to improve the photoelectric and cathodic protection performance is a promising method. Here, an ultrafine branched anatase TiO2 nanolawn (NL) photoanode co-decorated with CdS nanoparticles and reduced graphene oxide quantum dots (rGO QDs) was prepared. Compared with single CdS modified TiO2 NL, the three-phase junction CdS/rGO QDs/TiO2 NL shows further enhanced photoelectrochemical conversion performance under simulated sunlight and visible light irradiation, increased by 66.7% and 83.3% compared to that of CdS/TiO2 NL, respectively. The rGO QDs, which acted as a high-efficiency electron transporter, are uniformly deposited on the TiO2 NL, and further promote the transport efficiency of photogenerated electrons. CdS as a visible-light responder is responsible for broadening the spectral response, and the ultrafine branched TiO2 NL substrate greatly expands the photon capture area and increases the electron collection sites. Finally, the synergy of the above three aspects ensures that the ternary CdS/rGO QDs/TiO2 NL photoanode exhibits further enhanced simulated sunlight-driven and visible light-driven photoelectric conversion efficiency and a photoinduced cathodic protection effect on 316L stainless steel and pure copper.
研究领域:
海洋腐蚀防护
·
光电化学
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材料科学
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纳米技术
·
太阳能利用
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Qiang Zeng,Yongji Huang,Leiming Huang,Liang Hu,Daoling Xiong,Hui Zhong,Zhiguo He
The reduction of Cr(VI) by iron-based materials was inhibited under neutral and alkaline conditions due to the production of precipitates. In this work, a novel composite with a wide pH range application in the remediation of Cr(VI) contamination, SiO 2 /nano-FeC 2 O 4 composite (SNFC), was prepared from natural biotite-containing minerals. Transmission electron microscope (TEM) analysis indicated that nano-FeC 2 O 4 with average particle size of 10.08 nm was uniformly coated on the surface of layered minerals. Batch experiments results showed that Cr(VI) was completely removed in the pH range of 2–10 within 60 min at an initial Cr(VI) concentration of 20 mg/L. The removal rate of Cr(VI) was decreased when the initial pH value increased from 2 to 6 and then kept at constant when the initial pH value increased from 6 to 10. Furthermore, continuous fixed bed column studies showed that simulated permeable reactive barriers (PRB) with SNFC was considerably effective for in situ removal of Cr(VI) from groundwater under alkaline conditions. Characterizations of X-ray diffraction (XRD) and scanning electron microscope (SEM) suggested that the reactive component in the composite for Cr(VI) removal was nano-FeC 2 O 4 rather than biotite itself. The Cr(VI) removal mechanisms of SNFC involved reduction, precipitation and surface complexation. These results plus the preliminary cost analysis indicated that the composite was an efficient, economical, and easy for mass production material with application for remediation of Cr(VI) polluted groundwater in a wide pH range.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 49
·495605
·
IF 3.874
Qiushi Jiang,Zhaolian Han,Yafeng Yuan,Zhiqiang Cheng
By means of electrospinning combined with impregnation and calcination, the thin-walled TiO2 nano-burst tubes with Fe2O3 nanograss on the surface were synthesized. The effects of precursor properties and concentration on the morphology, structure and photochemical properties of the prepared nanostructures were studied. Adding K3[Fe(C2O4)3]·3H2O into the electrospinning solution as the precursor can not only realize the preparation of nanograss and thin-walled nano-burst tubes, but also achieve better degradation effect than that of FeCl3. However, the composite prepared by adding 2% K3[Fe(C2O4)3]·3H2O has the best synergistic effect, showing the best photoresponse performance and catalytic efficiency, and achieving the degradation of 94% levofloxacin within 90 min. In this study, a simple and economical synthesis strategy was proposed, that is, TiO2/Fe2O3 heterostructure with special structure was prepared by introducing a small amount of acid or metallic acid salts into the precursor as a high-performance photocatalyst.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Technology & Innovation
·
2021
·
IF 5.263
Xuecheng Ping,Yan Zhang,Qian Zhao,Yun Lu,Liang Hao
Flexible TiO 2 nanograss array film was prepared by simple chemical oxidation of Ti wire mesh at a low temperature of 353 K. To improve its visible-light-driven photocatalytic activity, we further carried out a low-temperature chemical reduction to introduce oxygen vacancies in the solution of ethylene glycol (EG) and ammonium fluoride (NH 4 F). The results of XPS and EPR confirmed the formation of surface and bulk oxygen vacancies was confirmed, and their concentrations increased as the reduction time increased. Compared with the as-annealed TiO 2 film, the as-reduced specimens exhibited higher visible-light-driven photocatalytic activity. When reduction time was 48h, the photocatalytic activity was increased by 15.8 times compared to the as-annealed sample. The remarkable improvement in photocatalytic activity should be ascribed to the oxygen vacancies’ introduction. The most excellent photocatalytic performance was obtained when a suitable concentration ratio of surface oxygen vacancies to bulk oxygen vacancies was reached. Low-temperature chemical reduction in the solution of EG + NH 4 F is very efficient and convenient for introducing defects such as oxygen vacancies and Ti 3 + .
研究领域:
材料科学
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环境科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2019
·Vol. 19
·期 22
·5055
·
IF 3.031
Min Jiang,Peng Sun,Jie Zhao,Lihua Huo,Guofeng Cui
Flexible physiological medical devices have gradually spread to the lives of people, especially the elderly. Here, a flexible integrated sensor based on Au nanoparticle modified copper hydroxide nanograss arrays on flexible carbon fiber cloth ([email protected](OH)2/CFC) is fabricated by a facile electrochemical method. The sensor possesses ultrahigh sensitivity of 7.35 mA mM−1cm−2in the linear concentration range of 0.10 to 3.30 mM and an ultralow detection limit down to 26.97 nM. The fantastic sensing properties can be ascribed to the collective effect of the superior electrochemical catalytic activity of nanograss arrays with dramatically enhanced electrochemically active surface area as well as mass transfer ability when modified with Au and intimate contact between the active material ([email protected](OH)2) and current collector (CFC), concurrently supplying good conductivity for electron/ion transport during glucose biosensing. Furthermore, the device also exhibits excellent anti-interference and stability for glucose detection. Owing to the distinguished performances, the novel sensor shows extreme reliability for practical glucose testing in human serum and juice samples. Significantly, these unique properties and the soft structure of silk fabric can provide a promising structure design for a flexible micro-device and a great potential material candidate of electrochemical glucose sensor.Keywords:Cu(OH)2nanograss;Au nanoparticles;glucose detection;flexible electrochemical biosensor
研究领域:
材料科学
·
电化学
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生物医学工程
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Siwei Zhao,Ying Chen,Zhiyang Zhao,Longfei Jiang,Chi Zhang,Jianshou Kong,Xufei Zhu
Anodic TiO 2 nanotubes have been intensively studied for the application in supercapacitors , but the formation of nanograss is often avoided for the belief that it may retard capacitive performance. We fabricate TiO 2 nanotubes topped with nanograss by H 3 PO 4 solution soaking and hydrogenation doping, which in fact increases the capacitance of nanotubes in a fast and convenient way. The new structure exhibits an enhanced areal capacitance by up to 67.7% and by up to 23.5% after 2000 times of cycling. The capacitance generally increases with the nanotube length and reaches the maximum with an optimal nanograss length. The electric charge during hydrogenation doping is determined to quantify the general doping effect. Compared with ordinary nanotubes, nanograss has larger contact area with electrolyte during doping. Therefore, the grass-topped structure yields more electric charge and Ti 3+ during doping, which attributes to the improved capacitance.
研究领域:
材料科学
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纳米技术
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电化学
·
能源存储
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表面工程
✓ 已验证
DOI
高影响因子
International Journal of Environmental Science and Technology
·
2025
·
IF 3.4
Shitu A.,Tadda M. A.,Li H.,Danhassan U. A.,Gouda M.,Zhou J.,Liu D.,Chen W.,Zhu S.
The recent development in mariculture production has led to the global need to find an eco-friendly treatment that could mitigate the detrimental effects of nitrogenous compounds on aquatic species, the environment, and public health. The potential application of corn straw biochar (BC) combined with nano-ferrous oxalate (FeC 2 O 4 ), integrated into a sponge (BC/FeC 2 O 4 /SB) as a cost-effective and sustainable novel carrier for the removal of nitrogenous compounds, was explored in this study. The modified carriers were filled into a moving bed bioreactor (MBBR) to treat simulated saline aquaculture wastewater for the first time. Scanning electron microscope (SEM) and Fourier-transform infrared (FTIR) spectroscopy analyses characterized the carrier biofilm morphology and functional group compositions. Findings showed that the modified carrier achieved the highest reduction percentages of 99.49 ± 0.29% for ammonium and 81.3 ± 2.1% for nitrate, with lower nitrite accumulation by day 136. The microbial sequencing analysis revealed that the coexistence of nitrogen removal and salt-tolerant microbes from the genera Aquimonas (25.15%), Woodsholea (20.44%), Hydrogenophaga (14.73%), Nitrosomonas (4.01%), Rhodococcus (2.70%), and Nitrospira (1.97%) resulted in the enhanced treatment performance observed in the modified BC/FeC 2 O 4 /SB carrier-filled MBBR as compared to the control MBBR. The data obtained in this study provide a comprehensive understanding of the role of modified BC/FeC 2 O 4 /SB carriers for the efficient treatment of saline RAS wastewater using MBBR.
研究领域:
环境科学
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生物技术
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水处理
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微生物学
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海洋科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ruansheng Guo,Qiushun Zou,Bo Li,Yimin Chen,Chenjie Gu,Dandan Qiu,Yuzhong Qian,Peiqing Zhang,Xiang Shen
Surface-enhanced Raman spectroscopy (SERS) serves as an ultrasensitive and non-destructive spectroscopy technique that identifies trace analytes and enables numerous applications in the field of sensors, monitors, etc. Here, we theoretically proposed and experimentally demonstrated the nanocavity-supported silver nanograss (NSSN) used to construct a uniform and highly sensitive SERS substrate for analyzing various molecules. This is a sandwich nanostructure composed of silver nanograss, aluminum oxide (Al 2 O 3 ) nanocavity, and gold mirror on a silicon wafer. Originating from the homogeneous nanograss fabricated by the oblique-angle deposition, the relative standard deviation (RSD) of 4-mercaptobenzoic acid (4-MBA) SERS signals on multiple sites was down to 4.67%. Additionally, NSSN achieved a 20-fold enhancement of 4-MBA Raman signals compared to the pure nanograss on a silicon wafer (PNSW), which was attributed to a nanocavity-enhanced localized electric field. Moreover, the NSSN was used to detect the Rhodamine 6G (R6G) and Crystal Violet (CV) molecules with detection limits of 10 −9 M and 10 −8 M, respectively. The results indicate that NSSN possesses good performance integration in terms of uniformity, local field enhancement, and highly sensitive detection of multiple analytes compared to nanoparticle-based SERS substrates, suggesting that it is a promising platform for developing biomedical sensing, environmental monitoring, medical diagnosis, etc.
研究领域:
纳米技术
·
等离激元学
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分析化学
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光谱学
·
生物传感器
✓ 已验证
产品关联
DOI
高影响因子
Pharmaceuticals
·
2024
·Vol. 17
·期 6
·805
·
IF 4.3
Tian-Qu He,Zhi Wang,Chuang-Ye Li,Yao-Wang Zhao,Xin-Yi Tong,Jing-Hong Liu,Jian-Ming Ouyang
Purpose:Adhesion between calcium oxalate crystals and renal tubular epithelial cells is a vital cause of renal stone formation; however, the drugs that inhibit crystal adhesion and the mechanism of inhibition have yet to be explored.Methods:The cell injury model was constructed using nano-COM crystals, and changes in oxidative stress levels, endoplasmic reticulum (ER) stress levels, downstream p38 MAPK protein expression, apoptosis, adhesion protein osteopontin expression, and cell–crystal adhesion were examined in the presence ofLaminarinpolysaccharide (DLP) and sulfated DLP (SDLP) under protected and unprotected conditions.Results:Both DLP and SDLP inhibited nano-COM damage to human kidney proximal tubular epithelial cell (HK-2), increased cell viability, decreased ROS levels, reduced the opening of mitochondrial membrane permeability transition pore, markedly reduced ER Ca2+ion concentration and adhesion molecule OPN expression, down-regulated the expression of ER stress signature proteins including CHOP, Caspase 12, and p38 MAPK, and decreased the apoptosis rate of cells. SDLP has a better protective effect on cells than DLP.Conclusions:SDLP protects HK-2 cells from nano-COM crystal-induced apoptosis by reducing oxidative and ER stress levels and their downstream factors, thereby reducing crystal–cell adhesion interactions and the risks of kidney stone formation.
研究领域:
药理学
·
泌尿学
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细胞生物学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 32
·7233-7252
·
IF 5.344
Hui Zhang,Xin-Yuan Sun,Xue-Wu Chen,Jian-Ming Ouyang
We studied the protection of degraded Porphyra yezoensis polysaccharide (PYP) on human proximal tubular epithelial cells (HK-2) from cytotoxicity of nano-calcium oxalate monohydrate (COM) crystal, and the regulation of adhesion and endocytosis of the COM crystal. Four degraded fractions, namely, PYP1, PYP2, PYP3, and PYP4, were successfully obtained, with molecular weights (Mws) of 576.2, 49.5, 12.6, and 4.02 kDa, respectively. PYP protection reduced the crystal toxicity, prevented the destruction of cell morphology and cytoskeleton, inhibited the production of reactive oxygen species and the decline of lysosomal integrity, and reduced the expression of osteopontin and transmembrane protein (CD44). PYPi inhibited the adhesion and endocytosis of HK-2 cells by nano-COM. Endocytic COM crystals were accumulated in the lysosomes. With decreasing molecular weight, the ability of PYP to reduce cell damage and inhibit cell adhesion and endocytosis increased. PYP4, which has the smallest molecular weight, weaker intramolecular hydrogen bonds and more reducing groups, showed the best biological activity. PYPi can reduce the oxidative damage of the crystal to the cell, inhibit the adhesion and endocytosis of the crystal, and reduce the risk of kidney stone formation. Therefore, PYP, especially PYP4, has potential for use as a green drug to inhibit the formation and recurrence of calcium oxalate stones.
研究领域:
药理学
·
肾病学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Lihua Chen,Hui Ming,Bowen Li,Chen Yang,Shanshan Liu,Yajie Gao,Tingting Zhang,Canhua Huang,Tingyuan Lang,Zhuo Yang
Cancer metastasis poses significant challenges in current clinical therapy. Osthole (OST) has demonstrated efficacy in treating cervical cancer and inhibiting metastasis. Despite these positive results, its limited solubility, poor oral absorption, low bioavailability, and photosensitivity hinder its clinical application. To address this limitation, a glutathione (GSH)-responded nano-herb delivery system (HA/MOS@OST&L-Arg nanoparticles, HMOA NPs) is devised for the targeted delivery of OST with cascade-activatable nitric oxide (NO) release. The HMOA NPs system is engineered utilizing enhanced permeability and retention (EPR) effects and active targeting mediated by hyaluronic acid (HA) binding to glycoprotein CD44. The cargoes, including OST and L-Arginine (L-Arg), are released rapidly due to the degradation of GSH-responsive mesoporous organic silica (MOS). Then abundant reactive oxygen species (ROS) are produced from OST in the presence of high concentrations of NAD(P)H quinone oxidoreductase 1 (NQO1), resulting in the generation of NO and subsequently highly toxic peroxynitrite (ONOO − ) by catalyzing guanidine groups of L-Arg. These ROS, NO, and ONOO − molecules have a direct impact on mitochondrial function by reducing mitochondrial membrane potential and inhibiting adenosine triphosphate (ATP) production, thereby promoting increased apoptosis and inhibiting metastasis. Overall, the results indicated that HMOA NPs has great potential as a promising alternative for the clinical treatment of cervical cancer.
研究领域:
药学
·
纳米技术
·
癌症研究
·
药物递送系统
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）