ChemPlusChem
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2013
·Vol. 78
·期 6
·481-485
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IF 0
Shichao Du,Zhiyu Ren,Yang Qu,Jian-qiang Wang,Lingjun Kong,Keying Shi,Buhe Bateer,Honggang Fu
Graphical Making a stand : By means of in situ reduction and self-assembly at an unconventional liquid–liquid interface, free-standing ultrathin cobalt nanosheets (CoNs) consisting of nanosized Co clusters were successfully synthesized (see figure). The as-prepared CoNs display ferromagnetic behavior and a large thermal irreversibility. This strategy has been used also in the synthesis of Fe and Ni nanosheets.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
VACUUM
·
2018
·
IF 2.067
Guobo Yang,Baoqiang Xu,Xianjun Lei,Heli Wan,Bin Yang,Dachun Liu,Zhijun Wang
A new process to fabricate porous titanium by calcium vapor in-situ reduction of titanium sespuioxide was presented in this paper. The mixture of Ti 2 O 3 and CaCl 2 powders was preformed and reduced by calcium vapor. The porous titanium structure was obtained after leaching reduction products with hydrochloric acid and deionized water. The pore structure , morphology, composition of reduction products were investigated by SEM-EDS and XRD . The influence of different contents of anhydrous calcium chloride on porosity was discussed. The results show metallic titanium products with two types of pore structures and vacuum sintering treatment strengthened effectively connection between titanium particles. The porosity of porous titanium samples was 62%–82% and more than 90% of pores are open-pores.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 41
·17488-17495
·
IF 7.394
Zuyang Zheng,Zhibin Fang,Xinxin Ye,Xiaobin Yao,Xianzhi Fu,Sen Lin,Ping Liu
Surface oxygen vacancy has been investigated extensively due to its great influence on photocatalysis in recent years. Among these investigations, the location of surface defects is found to be a key factor during the photocatalytic procedure. Especially when a crystal facet is involved, the synergistic action between these two factors may greatly increase the photocatalytic efficiency. Location of defects would greatly help in understanding the mechanism of this coupling action. Without an available technique, however, it is very difficult to gain the position information directly. In this paper, we provide a low-cost and visualized method to solve this problem via in situ reduction of Au. TiO2 with surface oxygen vacancy on a specific area is synthesized via a photochemical reaction. Then the Au ion was reduced at the place where oxygen vacancy exists on the TiO2 surface. Hence, the localization of surface vacancy will be determined by examining the location of Au particles. Moreover, application of this method can be extended to other surface defects such as oxygen vacancy on oxide semiconductors, Ti3+ in TiO2, Zn vacancy on ZnO, etc. This technique is helpful for understanding how surface defects affect the properties of semiconductors.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
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2024
·Vol. 24
·期 21
·6931
·
IF 3.4
Qilin Wang,Wei Wang,Yizhuo Fan,Jian Fang,Yu Chen,Shengping Ruan
Ethyl acetate is a critical medical indicator for detecting certain types of cancer. However, at present, available sensitive materials often exhibit drawbacks, such as high operating temperatures and poor responses to low concentrations of ethyl acetate. In this study, a ZnO nanorod sensing material was prepared using high-temperature annealing and a hydrothermally synthesized metal-organic framework (MOF) as a template. Au nanodots (AuNDs) were subsequently modified on the ZnO nanorods using an in situ ion reduction, which provided a better dispersion of Au nanodots compared with that obtained using the common reductant method. A variety of characterization methods indicate that the highly dispersed AuNDs, which possess a high catalytic activity, were loaded onto the surface as active centers, leading to a significant augmentation in the adsorption of oxygen on the surface compared with the original ZnO material. Consequently, the AuND@ZnO material exhibited heightened responsiveness to ethyl acetate at a lower operating temperature. The Au@ZnO-based sensor has a response rate (Ra/Rg) of 41.8 to 20 ppm ethyl acetate gas at 140 °C, marking a 17.4-fold increase compared with that of the original material. Due to its low power consumption and high responsiveness, AuND@ZnO is a promising candidate for the detection of ethyl acetate gas in medical applications.
研究领域:
材料科学
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医学检测
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-11
·
IF 5.228
Leng Yumin,Fu Ling,Ye Liqun,Li Bo,Xu Xiumei,Xing Xiaojing,He Junbao,Song Yuling,Leng Chaoliang,Guo Yongming,Ji Xiaoxu,Lu Zhiwen
An in-situ reduction method has been reported to prepare gold nanoparticles (GNPs) of 40–110 nm by using the green reducing agents of proteins, which are activated by H 2 O 2 and the superoxide anion ( ). The protein of collagen turns HAuCl 4 to the aqueous Au(I) ainions, which are further reduced by other proteins to be highly monodispersed and spherical GNPs of different sizes. The GNPs reduced by different proteins are found to be with the exposed {100} facets, the distinctive UV-vis absorption spectra and various colors (See Fig. 1 ). By means of extracting the color responses, such as red, green and blue (RGB) alterations, an in-situ reduction method-based multidimensional sensing platform is fabricated in the process of GNPs synthesis. Without further modification of GNPs, nine common proteins are found to be well detected and discriminated at different concentrations. Moreover, this sensing platform also demonstrates great potentials in qualitative and semiquantitative analysis on the individuals of these proteins with high sensitivity. Furthermore, the validation of this multidimensional sensing platform has been carried out by analysis on the spiked proteins in human urine and the target proteins in complex matrix (e.g. lysozyme in human tear). ( a ) Schematic illustration of an in-situ reduction method to synthesize monodispersed and spherical GNPs by using proteins, the reducing power of which activated by H 2 O 2 and the superoxide anion ( ). ( b ) The distinctive colors of as-synthesized GNPs reduced by different proteins.
研究领域:
生物化学
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纳米医学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
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2021
·
IF 3.383
Yun Mou,Yang Peng,Jiaxin Liu,Qing Wang,Zhenyu Lei,Fengshun Wu,Mingxiang Chen
To solve the high cost and high sintering temperature of Ag nanoparticle inks and the poor storage stability of Ag precursor inks, an inexpensive and self-reducing Ag 2 O ink was designed for fabricating highly flexible printed conductors at low sintering temperature. The printed Ag 2 O inks can be in-situ reduced to Ag particles and form the conductive network, and the electrical properties and flexibility of the sintered Ag tracks were systematically investigated. Consequently, the printed Ag tracks sintered at 160 °C exhibit the low electrical resistivity of 1.38 × 10 −4 Ω cm, and the relative resistances (R/R o ) of Ag tracks are less than 1.3 and 1.7 after 1000 times of the bending and twisting tests, respectively. These results demonstrate that the inexpensive Ag 2 O ink provides an attractive prospect for low temperature fabricating high-quality flexible printed conductors.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Haotian Wu,Longqian Xu,Yunqian Zhang,Jiaming Zhang,Shuai Peng,Deli Wu
Recovering valuable metal resources from industrial wastewater has environmental and economic significance. Flow-electrode capacitive deionization (FCDI) has been successfully used to remove salt and heavy metals. However, the use of this technology in heavy metal treatment has several limitations, including low selectivity, poor long-term stability, and production of low-quality metal products. In this study, a new strategy for recovering chromium (Cr) from wastewater was proposed using an in-situ reduction method. A liquid membrane chamber (LMC) was introduced into a classic three-chamber FCDI and an extraction solution containing Na 2 SO 3 and NaCl was used to capture Cr in wastewater. During FCDI operation, the CrO 4 2− ions entered the LMC were immediately reduced to Cr 3+ and retained in the extraction solution. Completing anions (i.e., Cl − ) in the extraction solution maintained the concentration of SO 3 2− ions, and thereby reducing the consumption of reagents. The improved FCDI system exhibited satisfactory separation performance and high stability during semi-continuous operation. Freshwater, Cr, and copper were obtained in the separation chamber, LMC, and flow electrode chamber, respectively. The facile approach may open the doors for the separation and recovery of metal resources from water/wastewater with high scalability and universality.
研究领域:
环境科学
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资源回收
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产品关联
DOI
高影响因子
Inorganics
·
2023
·Vol. 11
·期 4
·155
·
IF 2.9
Tie Shi,Yanmei Feng,Yi Zhong,Hao Ding,Kai Chen,Daimei Chen
High photoelectrochemical water oxidation efficiency can be achieved through an efficient photogenerated holes transfer pathway. Constructing a photoanode semiconductor heterojunction with close interface contact is an effective tactic to improve the efficiency of photogenerated carrier separation. Here, we reported a novel photoanode p-n junction of Ti:Fe2O3/Cu2O (n-Ti:Fe2O3and p-Cu2O), Cu2O being obtained by in situ reduction in CuAl-LDH (layered double hydroxides). The Ti:Fe2O3/Cu2O photoanode exhibits a high photocurrent density reaching 1.35 mA/cm2at 1.23 V vs. RHE is about 1.67 and 50 times higher than the Ti:Fe2O3and α-Fe2O3photoanode, respectively. The enhanced PEC activity for the n-Ti:Fe2O3/p-Cu2O photoelectrode is due to the remarkable surface charge separation efficiency (ηsurface85%) and bulk charge separation efficiency (ηbulk72%) formed by the p-n junction and the tight interface contact formed by in situ reduction. Moreover, as a cocatalyst, CuAl-LDH can protect the Ti:Fe2O3/Cu2O photoanode and improve its stability to a certain extent. This study provides insight into the manufacturing potential of in situ reduction layered double hydroxides semiconductor for designing highly active photoanodes in the field of photoelectrochemical water oxidation.
研究领域:
材料科学
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电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2010
·
IF 1.616
Zhenglong Yang,Xujing Shi,Junjie Yuan,Hongting Pu,Yongsheng Liu
Poly(3-hexylthiophene) (P3HT)/graphene nanocomposites were facilely prepared via an in situ reduction of modified graphite oxide (mGO) in the presence of P3HT. The chemical and aggregated structures of the P3HT/mGO nanocomposites were successfully characterized by means of atomic force microscope (AFM), transmission electron microscope (TEM), photoluminescence (PL), Raman spectra , X-ray photoelectron spectroscopy (XPS) and UV–vis measurements. Coated by P3HT, reduced modified graphite oxide (re-mGO) could significantly improve their processing problem in common organic solvent . It was shown that P3HT chains were attached to re-mGO sheets closely and there existed the pi–pi interaction between P3HT and re-mGO. The P3HT/mGO nanocomposites exhibited good dispersion in chloroform and show high storage stability (>20 days). This finding provides an efficient method for fabricating a light energy conversion materials with new optical and electrical properties, combining excellent mechanics, heat-stabilization properties of graphene and excellent optical, electrical, processing and film forming properties of soluble polythiophene materials.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2020
·Vol. 45
·期 8
·1293-1299
·
IF 1.544
Xiaomin Song,Qi Huang,Bo Jin,Rufang Peng
To improve the safety of CL-20, rGO was integrated into CL-20 (CL-20/rGO) by in-situ reduction. The prepared composites were characterized by Scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, High-performance liquid chromatography and Power X-ray diffraction, which proves that the presence/encapsulation of rGO on CL-20 surface would not change the molecular structure, amount and crystal form of raw CL-20. In addition, the thermal stability of the composites has improved, while the mechanical sensitivity was desensitized compared to raw CL-20, suggesting this in-situ reduction could be utilized to improve the safety of CL-20.
研究领域:
材料科学
·
爆炸化学
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Leilei Wu,Yun Yuan,Xinyi Huang,Xiaoyan Liu,Bo Xu,Li Cui,Qiang Wang,Ping Wang
The development of textiles with efficient and long-lasting antimicrobial properties is critical for mitigating medical cross-infections and addressing the growing demands of public health. Herein, an effective approach was demonstrated to fabricate biocompatible composite textiles with robust antimicrobial properties, through dynamic polydisulfide assisted in-situ reduction and encapsulation of nanosilver. Specifically, a reductive platform was established on cotton surfaces by sequentially grafting γ-aminopropyl triethoxysilane and α-lipoic acid (ALA). Subsequently, the amino groups and the dynamically-generated sulfhydryl groups within ALA units were utilized to initiate the reduction of silver ions without the need for additional reductants, thereby forming a stable antibacterial matrix layer on the fiber surface. The resulting fabric exhibits durable antimicrobial properties, achieving a 99.99 % antibacterial and antifungal efficacy even after 50 cycles of standard laundering. Notably, the deposition of silver nanoparticles endows the cotton fabric with significant photothermal conversion ability, and facilitates the generation of multiple bactericidal free radicals. These properties enable the effective eradication of bacteria and fungi on the textile surface within 10 min of irradiation with an intensity of 100 mW/cm 2 . Furthermore, the photothermal antimicrobial fabric retains satisfactory inherent wearability and biocompatibility. The present work provides an alternative for developing robust and durable antimicrobial textiles.
研究领域:
材料科学
·
生物医学工程
·
抗菌材料
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 22
·1831
·
IF 4.4
Dianfeng Cao,Yuwen Li,Chao Lv,Yongtao An,Jiangfeng Song,Mingcan Li,Xin Zhang
Catalytic methane decomposition (CMD) reaction is considered a promising process for converting greenhouse gas CH 4 into hydrogen and high-value-added carbon materials. In this work, a series of Al 2 O 3 -supported FeCo alloy catalysts were successfully prepared in the CMD process. Compared to the pre-reduced catalysts, the in situ reduced FeCo alloy catalysts showed higher methane conversion rates, with the highest reaching 83% at 700 °C, due to the finer active nanoparticle size and greater exposure of active site. Furthermore, the time-on-stream tests demonstrated that the catalytic activity of in situ reduced FeCo alloy catalysts could remain above 92.3% of the highest catalytic activity after 10 h. In addition, TEM analyses of the carbon products from the CMD in situ reduced catalysts revealed the production of carbon nanofibers and nanotubes several microns in length after the reaction. This indicates that the in situ reduced FeCo alloy catalysts more effectively promoted the growth of carbon nanofibers. These results could provide a viable strategy for future methane decomposition development aimed at producing hydrogen and high-value carbon.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）