JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Xuefeng Liu,Shijie You,Nanqi Ren,Hao Zhou,Jinna Zhang
This study reports the development of complete solar-driven dual-photoelectrode fuel cell (PFC) based on WO 3 photoanode and Cu 2 O photocathode with peroxymonosulfate (PMS) serving as cathodic electron acceptor . As indicated by photoelectrochemical measurements, the PMS was able to improve thermodynamic properties of photocathode, achieving an increased open circuit potential from 0.42 V to 0.65 V vs standard hydrogen electrode (SHE). Under simulated sunlight irradiation (~100 mW cm −2 ), the maximum power density of 0.12 mW cm −2 could be obtained at current density of 0.34 mA cm −2 , which was 8.57 times of that produced by PFC without PMS (0.014 mW cm −2 ). Correspondingly, adding PMS (1.0 mM) increased overall removal efficiency of 4-chlorophenol (4-CP) from 39.8% to 96.8%, accounting for the first-order kinetic constant ( k =0.056 min −1 ) being 6.67 times of that in the absence of PMS ( k =0.0084 min −1 ). Radical quenching and electron spin-resonance (ESR) results suggested the contribution of free radicals (•OH and SO 4 •- ) and non-radical pathway associated with direct activation of PMS by Cu 2 O photocathode. Fourier transformed infrared (FTIR) analysis confirmed the strong non-radical interaction between Cu 2 O photocathode and PMS, resulting in 4-CP removal via activation of PMS by surface complex on Cu 2 O. The proof-in-concept complete solar-driven dual-photoelectrode fuel cell may offer an effective manner to realize water purification and power generation, making wastewater treatment more economical and more sustainable.
研究领域:
环境科学
·
光催化
·
能源材料
·
电化学
·
水处理技术
·
可持续能源
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 7
·期 6
·5172-5184
·
IF 1.5
Xu Zhu,Qin Liu,Xiaohua Zhu,Chunlan Li,Maotian Xu,Yong Liang
A new approach to synthesize graphene was applied by reduction of graphene oxide using ascorbic acid. Chitosan/graphene modified electrode could be employed for simultaneous determination of dopamine and ascorbic acid. The modified electrode showed excellent electrocatalytic activity towards the oxidation of DA and AA. The calibration curves for DA and AA were obtained in the range of 0.3-1067.5μM and 0.6-1378.1μM, respectively. Detection limits were 0.1μM and 0.01μM for DA and AA, respectively. The present method was applied to the determination of AA and DA in human serum samples and the results were quite promising.
研究领域:
分析化学
·
电化学
·
生物传感器
·
纳米材料
·
临床检验
·
神经化学
·
药物分析
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Kaitong Liu,Jian Han,Fuming Li,Congcong Jin,Zhihua Yang,Miriding Mutailipu,Shilie Pan
A case of hydrous borate with the formula of Ba 2 B 13 O 19 (OH) 5 ·5H 2 O was synthesized by the traditional hydrothermal method . It crystallizes in the chiral P 1 space group and has a unique two-dimensional 2 [B 13 O 19 (OH) 5 ] ∞ layer that is constructed by the hydrogen involved [B 13 O 22 (OH) 5 ] fundamental building blocks (FBBs). The Ba atoms and H 2 O molecules are filled in the three-dimensional pore constructed by the 2 [B 13 O 19 (OH) 5 ] ∞ layer. Interestingly, Ba 2 B 13 O 19 (OH) 5 ·5H 2 O is the first case of hydrous borates that has the above rare [B 13 O 22 (OH) 5 ] FBB and 2 [B 13 O 19 (OH) 5 ] ∞ layer, which enriching the structural chemistry of borate system. The diffuse reflection spectrum result shows that the ultraviolet (UV) cutoff edge of Ba 2 B 13 O 19 (OH) 5 ·5H 2 O is below 200 nm. Its second harmonic generation (SHG) response is approximately 1.0 times that of potassium dihydrogen phosphate at the 1064 nm fundamental wavelength and it is also phase-matchable. Both results indicate that the title compound is a nonlinear optical crystal for UV spectral region. Theoretical simulation calculation shows that the occupied VE states are mainly contributed by the O-2p orbitals, and therefore [B 13 O 22 (OH) 5 ] groups are the main sources of SHG effects.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 17
·21000-21003
·
IF 3.057
Jie Zhang,Zhenxing Yue,Yu Luo,Longtu Li
A cofired trilayer ceramic architecture showing as MgTiO 3 /TiO 2 /MgTiO 3 was designed to realize temperature-stable and ultrahigh- Q microwave dielectrics in the typical MgTiO 3 -TiO 2 system. The effects of TiO 2 content on the microwave dielectric properties of cofired trilayer ceramics were studied. Through the design of cofired trilayer architecture, the chemical reactions between MgTiO 3 and TiO 2 were limited within a narrow region of MgTiO 3 /TiO 2 interfaces (~ 15 µm in width), which could be beneficial for optimizing the microwave dielectric properties. Excellent characteristics of ε r ~ 18.38, Q×f value ~ 169,900 GHz and τ f ~ − 1 ppm/°C were gained for the MgTiO 3 /TiO 2 /MgTiO 3 ceramic architectures stacked with 1.63 vol% TiO 2 . The current work could serve as new strategies to develop high-performance dielectric resonators and multilayers for 5G wireless communication applications.
研究领域:
材料科学
·
无机非金属材料
·
电子陶瓷
·
微波介质材料
·
功能陶瓷
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2023
·Vol. 10
·期 5
·995-1003
·
IF 9.4
Wei Peng,Jianglei Chang,Jianwei Zhao,Dawei Wang,Zhen Liu,Genshui Wang,Shuxiang Dong
Piezoelectric PZT ceramics with high piezoelectric properties and good thermal stability are urgently desired concerning the practical application. New compositions of LiNbO 3 modified Pb(Ni 1/3 Nb 2/3 )O 3 PbZrO 3 PbTiO 3 ceramics have been prepared in this study. The effects of the introduction of the LiNbO 3 on the system were comprehensively investigated in terms of the phase structure, microstructure, electric properties, and thermal stability behavior of the ceramics. All compositions are located in the morphotropic phase boundary (MPB) region, and the ratio of the rhombohedral (R) phase increases obviously with the increase of LiNbO 3 concentration. With increasing the LiNbO 3 content, the piezoelectric properties were significantly enhanced. The sample added with 2% (in mole) LiNbO 3 shows excellent electric properties, including T m = 185 °C, ε r = 5,643, k p = 0.626, Q m = 51, d 33 = 902 pC/N. More importantly, no thermal depolarization behavior was observed in the temperature range of 25–100 °C. For PNN-PZT- x %LN ceramics, which is mainly attributed to the pinning effect resulted by the Li Pb ' − Nb Zr/Ti ∙ defect dipoles.
研究领域:
材料科学
·
功能陶瓷
·
压电材料
·
固态物理
·
电子材料
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 12
·11953-11960
·
IF 1.5
Benzhi Liu,Jinlong Yan,Min Wang,Xiangyang Wu
Molecularly imprinted polymers were prepared on the surface of acrylamide-functionalized multi-walled carbon nanotubes by thermal polymerization, which using nonylphenol as template molecule, methacrylic acid as functional monomer and ethyleneglycol dimethacrylate as crosslinking agent. The molecularly imprinted polymers were modified on the surface of glassy carbon electrode to prepare electrochemical sensor. The proposed sensor showed a linear range of 0.1 to 30 μM with a detection limit of 0.02 μM. The sensor exhibited good stability, selectivity and high sensitivity to nonylphenol detection. It was successfully applied to detect nonylphenol in water samples.
研究领域:
分析化学
·
环境监测
·
材料科学
·
电化学
·
传感器技术
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Jiang Wu,Haowen Bai,Wenjie Qu,Guanying Cao,Yanjie Zhang,Jingjie Yu
CsPbBr 3 quantum-dot borosilicate microcrystals and Eu 3+ -doped CsPbBr 3 quantum-dot microcrystals with different concentrations of Eu 3+ are successfully prepared by high temperature melting. The particle morphology of the microcrystals is characterized by scanning electron microscopy (SEM). The fluorescence characteristics are analyzed by fluorescence spectroscopy and CIE chromaticity coordinates . In this research, CsPbBr 3 quantum dots are effectively coated with borosilicate microcrystals to improve the stability of CsPbBr 3 quantum dots while ensuring its strong green emission at 517 nm. The energy transfer from CsPbBr 3 quantum dots to Eu 3+ occurs after doping. When changing the concentration of Eu 3+ , the emission peaks of perovskite broaden and blue shift occurs (517 nm→474 nm). The CIE color coordinate moves from (0.0807, 0.7200) to (0.4537, 0.2724). Therefore, the continuous adjustment of solid perovskite materials from green light to blue light and then to red light region is realized.
研究领域:
材料科学
·
纳米光学
·
无机非金属材料
·
光电子学
·
发光材料
·
固态化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 38
·22064-22071
·
IF 12.732
Wenda Zhang,Jie Feng,Fengqi Lu,Alberto J. Fernández-Carrión,Hui Fu,Xiaojun Kuang
Na-doped melilite-type silicate Sr2MgSi2O7 was reported to display high oxide ion conductivity. In this work, through multiple complementary techniques including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, solid-state 29Si and 23Na nuclear magnetic resonance spectroscopy, and DFT calculations of defect formation energies, we found that it is hard to replace Sr with Na in Sr2MgSi2O7, and the Sr2−xNaxMgSi2O7−0.5x compositions formed mixed crystalline Sr2MgSi2O7 and Na-containing glassy phases. AC impedance spectroscopy measurements indicated that the ionic conduction in Sr2−xNaxMgSi2O7−0.5x could be from Na+ ions in the glassy phase, instead of the oxide ions.
研究领域:
材料科学
·
固体离子导体
·
无机非金属材料
·
能源材料
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 3
·158
·
IF 1.784
Gao Dong-Sheng,Gao Xiang-Dong,Wu Yong-Qing,Zhang Tong-Tong,Yang Jing-Nan,Li Xiao-Min
Co doped BaSnO 3 films [BaSn 1 − x Co x O 3 (0 ≤ x ≤ 0.50), i.e., BSCO] have been grown on MgO single-crystal substrates via pulsed laser deposition. Effects of the Co-doping level on the crystallinity, the microstructure, and optical properties of the BSCO films are investigated. All the BSCO films are of high crystallinity and grown epitaxially on MgO substrates. The lattice parameter of the (200) plane drops linearly with the increase of the ‘ x ’ value. The Co doping is found to increase the film roughness and the grain size, and a RMS roughness of 8.33 nm and grain size up to 100 nm are observed in the film with x = 0.50. The low Co-doping level ( x = 0.05, 0.1) has slight anti-reflection effects on the incident visible light, and the Co-doping level higher than 0.2 reduces the optical transmittance significantly. The optical bandgap shows a first-rising then falling trend with the increase of the Co content, and the lowest bandgap of 1.94 eV is realized in the BSCO film with x = 0.50.
研究领域:
材料科学
·
凝聚态物理
·
薄膜制备
·
光学材料
·
功能氧化物
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Xue-Dong Xiao,Lin Shi,Li-Hui Guo,Jun-Wen Wang,Xiang Zhang
The supramolecular interaction between the water-soluble pillar[5]arene (WP[5]) as host and dopamine hydrochloride (DH) as guest was studied by spectrofluorometry . The fluorescence intensity of DH gradually decreased with increasing WP[5] concentration, and the possible interaction mechanism between WP[5] and DH was confirmed by 1 H NMR, 2D NOESY , and molecular modelling. Based on significant DH fluorescence, a highly sensitive and selective method for DH determination was developed for the first time. The fluorescence intensity was measured at 312 nm, with excitation at 285 nm. The effects of pH, temperature, and reaction time on the fluorescence spectra of the WP[5]-DH complex were investigated. A linear relationship between fluorescence intensity and DH concentration in the range of 0.07–6.2 μg mL − 1 was obtained. The corresponding linear regression equation is Δ F = 25.76 C + 13.56 (where C denotes the concentration in μg mL − 1 ), with the limit of detection equal to 0.03 μg mL − 1 and the correlation coefficient equal to 0.9996. This method can be used for the determination of dopamine in injection and urine samples. In addition, the WP[5]-DH complex has potential applications in fluorescent sensing and pharmacokinetics studies of DH.
研究领域:
分析化学
·
超分子化学
·
药物代谢
·
生物分析
·
药代动力学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Junwang Zhang,Lili Song,Kunlan Li,Qingda An,Hao Ma,Liyu Yang,Ligang Wei
Water addition was found to enhance the thermal stability of alkylimidazolium–acetate ionic liquids (ILs). Especially in the case of high water content (30–50 wt%), few decomposition products can be observed in the 1 H NMR spectra even after treatment for 24 h at 150 °C. On the basis of this finding, lignin treatment of water and acetate IL mixtures (50–90 wt% IL content) were investigated at 150 °C. The addition of water, as opposed to pure IL treatment, can inhibit the lignin depolymerization into small fragments. Lignin degradation and the structure of regenerated lignin are more affected by cation types of ILs rather than the IL contents and pH values. In the case of 50–70 wt% 1-ethyl-3-methylimidazolium acetate–water system, the specific inter-unit linkages of lignin can be broken down, and regenerated lignin with a narrow polydispersity index (5.0–9.6) can be obtained.
研究领域:
绿色化学
·
生物质转化
·
高分子化学
·
离子液体化学
·
木质素化学
·
可持续材料
·
热化学转化
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2023
·Vol. 34
·期 6
·1918-1932
·
IF 3.4
Yuqian Du,Xueya Wang,Ziwen Zhou,Feng Zhao,Song Li,Zhihua Liu,Zhengyu Wu,Shuai Zhao,Lin Li
Nowadays, although highly conductive polymer composites filled with two-dimensional graphene-based nano-fillers have been explored extensively, constructing nanocomposites with high performance, industrial feasibility, and more efficient conductive networks at lower nano-filler contents remains a challenge. To achieve the above objectives, industrial wastes microsilica powder (N98) with amorphous spherical structure and large particle size is employed in this work. And the hybrids (TGN) are obtained between N98 and graphene (GE) by the effective bridging and interface coupling of tannic acid, which can achieve the purpose of obtaining conductive composites with low-filler contents by traditional polymer processing technologies. The volume exclusion effect of N98 and its own assisted dispersion effect can prevent and attenuate graphene agglomeration, enabling the formation of a dense, complete and uniform conductive network in natural rubber (NR) matrix based on a small amount of graphene addition (parts per thousand). Thus, it give the nanocomposite highly functional, especially electric property. The results show that when the ratio of GE to N98 hybridization is 1:20, N98 and graphene are more uniformly hybridized together, and the volume exclusion effect is best matched with the rubber composites, and the comprehensive performance is optimal. Moreover, the electrical conductivity of NR/TG 1 N 20 nanocomposite can reach the balanced value of 10 −3 S·cm −1 with the GE loading of 0.48 phr, which shows the effectiveness of the prepared hybrids.
研究领域:
高分子科学
·
纳米复合材料
·
功能高分子
·
材料化学
·
导电聚合物
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）