SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Chongchong Miao,Amin Zhang,Yanan Xu,Shen Chen,Feimeng Ma,Chusen Huang,Nengqin Jia
A new electrochemiluminescence (ECL) sensor was constructed for the ultrasensitive detection of diphenhydramine hydrochloride (DPH) based on l -cysteine-functionalized multiwalled carbon nanotubes/gold nanoparticles (MWCNTs-Cys-AuNPs) nanocomposites. In this work, the nanocomposites were facilely synthesized by using l -cysteine as linking agent which could covalently conjugate to MWCNTs and AuNPs via amide bond and Au S bond. Herein, the prepared MWCNTs-Cys-AuNPs were used as matrix material and fixed by Nafion to adsorb Ru(bpy) 3 2+ on glassy carbon electrode (GCE) to provide a new ECL sensor for DPH . Then the electrochemical and ECL behaviors of the sensor were investigated. Approximate 9-fold enhancement in ECL intensity was observed after addition of DPH. By optimizing the experimental conditions, the proposed ECL sensor exhibited excellent assay performances in determination of DPH with a wide linear range (2 × 10 −8 –7.5 × 10 −4 M), low detection limit (6.7 × 10 −9 M), good reproducibility and acceptable stability. Furthermore, the constructed ECL sensor was used to analyze the DPH in real sample with a satisfactory result, which holds a great potential in the field of pharmaceutical analysis.
研究领域:
分析化学
·
药物分析
·
生物传感器
·
纳米医学
·
电化学
✓ 已验证
DOI
高影响因子
Energy Materials
·
2021
·Vol. 1
·期 2
·N
·
IF 0
Chen Yang,Nannan Gao,Xilong Wang,Jiajia Lu,Lijuan Cao,Yadong Li,Han-Pu Liang
Seawater splitting powered by solar or wind sources is a significant renewable energy storage technology for the production of green hydrogen energy. However, both the chlorine evolution reaction and chloride corrosion are intractable issues in seawater splitting. Here, a porous electrode based on a phosphate-intercalated NiFe (oxy)hydroxide shell coated on a nickel molybdate (NiMoO4) micropillar core (denoted as P-NiFe@NiMoO4) is synthesized through an electrochemical oxidation strategy. During the electrochemical oxidation process, the etching of MoO2 promotes the reconstruction of NiFe (oxy)hydroxide and the formation of porous structures in an alkaline solution. The optimized P-NiFe@NiMoO4 electrocatalysts afford a low overpotential of 258 mV at a current density of 100 mA/cm2 in alkaline seawater. By pairing the anode with a cathode of as-synthesized P-NiMoO, the electrolyzer presents a low voltage of 1.63 V at 100 mA/cm2 in alkaline seawater with excellent stability. Moreover, the remarkable stability of the anode seems to be attributed to the in-situ phosphate formed during the electrochemical oxidation process to passivate chloride corrosion.
研究领域:
电化学
·
能源材料
·
纳米催化
·
可再生能源
·
腐蚀科学
·
功能材料
·
电催化
✓ 已验证
DOI
RSC Advances
·
2015
·Vol. 5
·期 16
·12015-12024
·
IF 3.84
Juan Xia,Le Xin Song,Wei Liu,Yue Teng,Qing Shan Wang,Li Zhao,Mao Mao Ruan
We developed a simple and facile method for preparing two types of transition metal molybdates: AMoO4 (A = Ni and Zn) and B3Mo2O9 (B = Cu and Zn). Initially, a hydrothermal reaction at 383 K for 10 h in an aqueous solution of ammonium molybdate tetrahydrate (AMT) and metal acetates (MAc2, M = Ni, Cu and Zn) was carried out to synthesize their precursors: NiMoO4·xH2O, ZnMoO4·0.8H2O, Cu3(OH)2(MoO4)2 and Zn3(OH)2(MoO4)2. Subsequently, AMoO4 with a 1D structure and B3Mo2O9 with a 3D structure were successfully constructed by sintering the precursors at 873 K for 3 h in air. Our result presented the first evidence that the generation of α-ZnMoO4 and Zn3Mo2O9 is dependent on the initial concentration of AMT or Zn(Ac)2. More importantly, a highly monodisperse Cu3Mo2O9 micropompon structure was successfully created by an ethylenediaminetetraacetic acid (H4Y)-mediated hydrothermal route and a subsequent sintering process. We considered that H4Y, a strong competitive chelating ligand, played a significant role in prohibiting the formation of the intermediate (NH4)2Cu(MoO4)2, thereby not only producing a monodisperse structure of Cu3(OH)2(MoO4)2 but also reducing the size of the structure by forming a stable complex: CuY. Three independent experiments: photocatalysis, photocurrent response and lithium storage were performed to discuss several possible applications of the as-obtained Cu3Mo2O9 micropompons. Our data demonstrated that the Cu3Mo2O9 material exhibited excellent photocatalytic efficiency for the degradation of Congo red under visible light irradiation. Also, the time-dependent photoresponse of the Cu3Mo2O9 gave a very high ratio (about 171) of light current to dark current and a stable photocurrent density, which were a reflection of a high concentration of photogenerated electron–hole pairs. Further, the material indicated good charge–discharge stability and high coulombic efficiency in lithium-ion batteries even during the 100 cycles. We believe that the present study represents a significant step in the development of transition metal molybdates.
研究领域:
材料科学
·
无机化学
·
纳米科技
·
能源材料
·
光催化
·
电化学储能
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·23979-23994
·
IF 0
Li Yutong,Jin Xinglong,Qi Buying
The sulfate radical-based advanced oxidation processes (SR-AOPs) is a promising method for the degradation of pollutants, with the development of highly efficient catalysts for persulfate activation has been widely concerned. The novel BiCoFe-LDH (BCF-x) was synthesized successfully by coprecipitation method, which can activate peroxydisulfate (PDS) efficiently to degrade aniline. Comparative analysis with pure CoFe-LDH revealed a remarkable increase in reaction rate constant by approximately 14.66 times; the degradation rate of aniline (10 mg/L) was 100% in 60 min with the condition of 0.5 g/L BCF-1.5 and 0.5 g/L PDS, due to BCF-1.5 which was characterized as a complex of CoFe-LDH and Bi 2 O 2 CO 3 , promoting electron transport to improve the efficiency of activated PDS. In the reaction system, SO 4 •− , ·OH, and 1 O 2 were responsible for the aniline degradation and ·OH was the primary one. Furthermore, this work proposes a reaction electron transfer catalytic mechanism, which provided a new insight and good application prospect for efficient activation of PDS for pollutant degradation.
研究领域:
环境化学
·
催化
·
材料科学
·
水处理技术
✓ 已验证
DOI
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Jing Guo,Shanhui Zhu,Youliang Cen,Zhangfeng Qin,Jianguo Wang,Weibin Fan
A series of ordered mesoporous Nb x W (8 − x) oxides with tunable Nb/W ratio were successfully synthesized by evaporation-induced self-assembly method. The mesoporous structure, morphologies, surface chemical state, and acidic properties of these catalysts were fully characterized by low-temperature sorption of N 2 , small-angle and wide-angle XRD, TEM, Raman, XPS, and Py-IR. It was shown that the Nb x W (8 − x) oxides created large amounts of Lewis as well as Brønsted acid sites, which promoted the isomerization of glucose to fructose followed its dehydration to 5-hydroxymethylfurfural (HMF). Mannose was also formed via the epimerization of glucose. Of them, the mesoporous Nb 4 W 4 exhibited the best catalytic activity with a comparatively low E a about 90.2 kJ/mol and good stability in aqueous medium. The kinetic behavior revealed that Lewis acid sites facilitated to glucose-to-fructose isomerization while Brønsted acid sites promoted the dehydration of fructose to form HMF.
研究领域:
催化化学
·
生物质转化
·
绿色化学
·
多相催化
·
材料化学
·
碳水化合物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 7
·
IF 1.64
Pan Dongdong,Tian Hengshui
Soluble and thermally stable polycarbonate polyurethane elastomers were synthesized through a solvent-free and nonisocyanate melt transesterification process. The conditions of this process were studied, and the optimum conditions were as follows: the catalyst dibutyltin oxide dosage was 0.125 wt %, the raw material molar ( n ) ratio of dimethyl 1,6-hexamethylene dicarbamate (HDC) to poly(carbonate macrodiol) (PCDL) was n (HDC)/ n (PCDL) = 1:0.99, the reactants were prepolymerized under 100°C for 1 h and then under 185°C and a high vacuum for 4 h. Three different PCDLs were selected to participate in the reaction under the conditions mentioned previously, and their structures were characterized by Fourier transform infrared spectroscopy and X-ray diffraction. The products obtained from this process were still stable under 280°C. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41377.
研究领域:
高分子化学
·
生物材料
·
聚合物科学
·
材料化学
·
医用高分子
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2024
·Vol. 36
·期 4
·109730
·
IF 9.4
Hongyuan Sha,Dongling Yang,Yanran Shang,Zujian Wang,Rongbing Su,Chao He,Xiaoming Yang,Xifa Long
Sulfates are always promising short-wave ultraviolet (UV) nonlinear optical (NLO) candidates, if their birefringence could be greatly improved. Here, in terms of the insufficient birefringence , the unity of heteroleptic tetrahedral groups and triangular ones was proposed and implemented. Thus, a new semi-organic crystal, [C(NH 2 ) 3 ]S 3 O 6 (G 2 S 3 O 6 ), was obtained, which is composed of [S 3 O 6 ] 2− and [C(NH 2 ) 3 ] + groups. It exhibits excellent optical properties with a short absorption cutoff edge of 218 nm, a strong NLO response of 1.4 × KH 2 PO 4 , and more especially, a large birefringence of 0.097@546 nm. This birefringence leap makes the G 2 S 3 O 6 crystal achieve a phase-matching behavior under a 532 nm laser. Thus, the synergy of [S 3 O 6 ] 2− and [C(NH 2 ) 3 ] + groups results in excellent optical performances. This finding opens a new horizon for exploring novel UV NLO crystals.
研究领域:
材料科学
·
光学工程
·
无机化学
·
晶体化学
·
非线性光学
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 40
·2303227
·
IF 13.3
YuanZhe Wu,Quan Zong,Chaofeng Liu,Yanling Zhuang,Daiwen Tao,Jiangying Wang,Jingji Zhang,Qilong Zhang,Guozhong Cao
Vanadyl phosphate (VOPO 4 ·2H 2 O) has been regarded as one of the most promising cathode materials for aqueous Zn-ion batteries due to its distinct layered structure. However, VOPO 4 ·2H 2 O has not yet demonstrated the exceptional Zn ion storage performance owing to the structural deterioration during repeated charging/discharging process and poor intrinsic conductivity. In this work, 2D sodium vanadyl phosphate (NaVOPO 4 ·0.83H 2 O, denoted as NaVOP) is designed as a cathode material for Zn-ion batteries, in which sodium ions are preinserted into the interlayer, replacing part of water. Benefiting from the in situ surface oxidization, improved electronic conductivity, and increased hydrophobicity, the NaVOP electrode exhibits a high discharge capacity of 187 mAh g −1 at 0.1 A g −1 after activation, excellent rate capability and enhanced cycling performance with 85% capacity retention after 1500 cycles at 1 A g −1 . The energy storage mechanism of the NaVOP nanoflakes based on the rapid Zn 2+ and H + intercalation pseudocapacitance are investigated via multiple ex situ characterizations.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米材料
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 2
·1-17
·
IF 3.8
Song Lei,Zhang Hao,Wang Runnan,Wang Xiyue,Zhu Bo,Sun Dazhi,Lou Dawei
In this study, a magnetic composite flocculant containing Fe 3 O 4 magnetic nanoparticles was prepared using sodium silicate, aluminium sulfate, titanium sulfate, and sodium alginate as raw materials. Then, the effects of preparation conditions and flocculation parameters on the adsorption of Congo red were investigated. Specifically, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction, thermogravimetric analysis, scanning electron microscopy–energy-dispersive X-ray spectroscopy, transmission electron microscopy, and vibrating sample magnetometry were used to confirm the successful synthesis of the composite flocculant. One-way experiments revealed that a flocculant dosage of 40 mg/L yielded the highest Congo red removal rate of 95.43%. Compared with traditional flocculants, the flocs formed by the magnetic composite flocculant could settle faster; further, they could be magnetically separated for reuse, thereby reducing secondary pollution caused by the flocs and improving the utilisation rate. When the magnetic flocculant and flocs were mixed with dye wastewater in an appropriate ratio, recycling experiments showed that removal rates are still good, with no significant change in the adsorption capacity. The flocculation mechanism was dominated by chelation, adsorption bridging, net trapping, and sweeping effects, while charge neutralisation played a minor role in the process. The maximum adsorption of Congo red dye from aqueous solution by a magnetic iron tetraoxide–poly(aluminium–titanium silicate)–sodium alginate (SA) composite flocculant was calculated to be 1710.6 mg/g according to the Langmuir isotherm model. The negative value of ∆G° and positive values of ∆H° indicated spontaneity and heat absorption of the flocculation process.
研究领域:
环境科学
·
材料工程
·
化学工程
·
纳米技术
·
水处理
✓ 已验证
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 31
·期 3
·574-584
·
IF 5.6
Huo Xiangtao,Chai Rongxia,Gou Lizheng,Zhang Mei,Guo Min
The coagulation process is a widely applied technology in water and wastewater treatment. Novel composite polyferric magnesium–silicate–sulfate (PFMS) coagulants were synthesized using Na 2 SiO 3 ·9H 2 O, Fe 2 (SO 4 ) 3 , and MgSO 4 as raw materials in this paper. The effects of aging time, Fe:Si:Mg, and OH:M molar ratios (M represents the metal ions) on the coagulation performance of the as-prepared PFMS were systematically investigated to obtain optimum coagulants. The results showed that PFMS coagulant exhibited good coagulation properties in the treatment of simulated humic acid–kaolin surface water and reactive dye wastewater. When the molar ratio was controlled at Fe:Si:Mg = 2:2:1 and OH:M = 0.32, the obtained PFMS presented excellent stability and a high coagulation efficiency. The removal efficiency of ultraviolet UV 254 was 99.81%, and the residual turbidity of the surface water reached 0.56 NTU at a dosage of 30 mg·L −1 . After standing the coagulant for 120 d in the laboratory, the removal efficiency of UV 254 and residual turbidity of the surface water were 88.12% and 0.68 NTU, respectively, which accord with the surface water treatment requirements. In addition, the coagulation performance in the treatment of reactive dye wastewater was greatly improved by combining the advantages of magnesium and iron salts. Compared with polyferric silicate–sulfate (PFS) and polymagnesium silicate–sulfate (PMS), the PFMS coagulant played a better decolorization role within the pH range of 7–13.
研究领域:
环境工程
·
水处理技术
·
化学合成
·
废水管理
·
材料科学
✓ 已验证
DOI
高影响因子
Science Signaling
·
2020
·Vol. 13
·期 646
·
IF 6.467
Xiao-Wei Gu,Zi-Cong Chen,Zhen-Shan Yang,Yan Yang,Ya-Ping Yan,Yue-Fang Liu,Ji-Min Pan,Ren-Wei Su,Zeng-Ming Yang
Embryo implantation involves a sterile inflammatory reaction that is required for the invasion of the blastocyst into the decidua. Adenosine triphosphate (ATP) released from stressed or injured cells acts as an important signaling molecule to regulate many key physiological events, including sterile inflammation. We found that the amount of ATP in the uterine luminal fluid of mice increased during the peri-implantation period, and this depended on the presence of an embryo. We further showed that the release of ATP from receptive epithelial cells was likely stimulated by lactate released from the blastocyst through connexin hemichannels. The ATP receptor P2y2 was present on uterine epithelial cells during the preimplantation period and increased in the stromal cells during the time at which decidualization began. Pharmacological inhibition of P2y2 compromised decidualization and implantation. ATP-P2y2 signaling stimulated the phosphorylation of Stat3 in uterine luminal epithelial cells and the expression of early growth response 1 ( Egr1 ) and prostaglandin-endoperoxide synthase 2 ( Ptgs2, also known as Cox-2 ), all of which are required for decidualization and/or implantation, in stromal cells. Short exposure to high concentrations of ATP promoted decidualization of primary stromal cells, but longer exposures or lower ATP concentrations did not. The expression of genes encoding ATP-degrading ectonucleotidases increased in the decidua during the peri-implantation period, suggesting that they may limit the duration of the ATP signal. Together, our results indicate that the blastocyst-induced release of ATP from uterine epithelial cells during the peri-implantation period may be important for the initiation of stromal cell decidualization.
研究领域:
生殖生物学
·
发育生物学
·
细胞信号转导
·
分子胚胎学
·
免疫学（无菌性炎症）
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2020
·
IF 0.911
Hailin Xie,Zhihua Zhou,Wenjuan Liu,Yanmin Zhao,Tianlong Huang,Ping Chen,Ziwei Zhou,Dan Wang,Jianglong Duan,Jianjun Fang
Polymeric/ceramic composite scaffolds that are biocompatible and biodegradable are widely used for tissue engineering applications. In this work a series of poly(L-lactide-co-glycolide-co-ε-caprolactone)/nano-biaoactive glass-nano-β-tricalcium phosphate composite scaffolds were successfully fabricated and the influences of the inorganic content and freezing temperature on the physical properties were studied. The composite scaffolds with various inorganic contents showed an interconnected pore structure with irregular shapes. The composite scaffolds had a porosity that was reduced with increasing inorganic content and decreasing freezing temperature. The incorporation of inorganic fillers and decreasing freezing temperature improved the mechanical properties of the hybrid scaffolds. By appropriate control of these two factors (10.0 wt% content of NBAG and β-TCP with freezing at −30 °C) a suitable composite scaffold was prepared as a potential bone tissue engineering implant.
研究领域:
生物材料
·
组织工程
·
高分子科学
·
陶瓷材料
·
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）