Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 1086

会议视频 25

会议信息 4

年份

2024 2

2023 168

2022 174

2021 192

2020 95

2019 40

2018 26

2017 49

2016 30

2015 36

2014 46

2013 41

2012 21

2011 23

2010 43

2009 30

2008 19

2007 33

2006 3

2005 2

展开︾

关键词

SARS-CoV-2 7

微波散射计 5

碳中和 5

COVID-19 4

Cu(In 4

HY-2 4

2019 3

2型糖尿病 3

GPS 3

Ga)Se₂ 3

HY-2 卫星 3

HY-2A卫星 3

代谢与免疫 3

光催化 3

工程管理 3

微波辐射计 3

营养健康 3

CCS 2

CO₂利用 2

展开︾

检索范围：

排序：展示方式：

Electrochemical oxidation of humic acid at the antimony- and nickel-doped tin oxide electrode

TANG Chengli,YAN Wei,ZHENG Chunli

《环境科学与工程前沿（英文）》 2014年第8卷第3期页码 337-344 doi: 10.1007/s11783-013-0545-9

摘要： This work investigated the degradation of humic acid (HA) in aqueous solution by electrochemical oxidation with Antimony- and Nickel-doped Tin oxide electrode (Ni-Sb-SnO /Ti electrode) as the anode. Initial concentrations of HA ranged from 3 to 9 mg·L . Under such a concentration scope, the degradation of HA was a mass transfer controlled process. Degradation rate increased with the increase of HA initial concentration. Test on the effect of tert-butanol revealed that ·OH played an important role in the oxidation of HA. The absence of cation Ca was beneficial to HA degradation, which suggested that both indirect and direct electrolyze happened during the whole electrochemical oxidation process. Alkaly (pH= 12) and neutral (pH= 7) conditions were benefical to HA degradation.

关键词： electrochemical oxidation humic acid (HA) natural water Ni-Sb-SnO₂/Ti electrode

HTML PDF 收藏

Acid Red 73 by the yttrium-doped Ti/SnO

Li XU, Zhi GUO, Lishun DU

《化学科学与工程前沿（英文）》 2013年第7卷第3期页码 338-346 doi: 10.1007/s11705-013-1335-4

摘要： This work was conducted to study the ability of anodic oxidation of azo dye C.I. Acid Red 73 (AR73) using the yttrium-doped Ti/SnO -Sb electrodes. The effects of Sb doping level, yttrium doping level, thermal decomposition temperature and cycle times of dip-coating thermal decomposition on the properties of the electrodes were investigated. The results showed that the excellent electrochemical activity of Ti/SnO -Sb-Y electrode can be achieved at a 7∶1 molar ratio of Sn∶Sb and thermal decomposition temperature of 550°C. Moreover when the cycle times of dip-coating and thermal decomposition were up to 10 times, the performance of the electrode tends to be stable. The Ti/SnO -Sb electrodes doped with yttrium (0.5 mol-%) showed the most excellent electrochemical activity. In addition, the influences of operating variables, including current density, initial pH, dye concentration and support electrolyte, on the colour removal, chemical oxygen demand (COD) removal and current efficiency were also investigated. Our results confirmed that the current efficiency increased with the concentrations of dye and sodium chloride. Moreover, increasing the current density and the initial pH would reduce the current efficiency.

关键词： SnO₂-Sb yttrium doping anodic oxidation azo dyes

HTML PDF 收藏

Complete oxidation of methane on CoO-SnO catalysts

Xingfu TANG , Jiming HAO , Junhua LI ,

《环境科学与工程前沿（英文）》 2009年第3卷第3期页码 265-270 doi: 10.1007/s11783-009-0019-2

摘要： CoO-SnO hybrid oxides were prepared by the coprecipitation method and were used to oxidate methane (CH) in presence of oxygen. The CoO-SnO with a molar ratio of Co/(Co+Sn) at 0.75 exhibited the highest catalytic activity among all the CoO-SnO hybrid oxides. Experimental results showed that the catalysts were considerably stable in the CH combustion reaction, and were verified by X-ray photoelectron spectra (XPS). It was found that CoO was the active species, and SnO acted as a support or a promoting component in the CoO-SnO hybrid oxides. The surface area was not a major factor that affected catalytic activity. The hydrogen temperature-programmed reduction (H-TPR) results demonstrated that the interaction between cobalt and tin oxides accelerated the mobility of oxygen species of CoO-SnO, leading to higher catalytic activity.

关键词： Co₃O₄-SnO₂ complete oxidation methane (CH₄)

HTML PDF 收藏

Tailoring the simultaneous abatement of methanol and NO on Sb-Ce-Zr catalysts via copper modification

《环境科学与工程前沿（英文）》 2022年第16卷第10期 doi: 10.1007/s11684-022-1565-0

摘要：

● Cu addition enhances CH₃OH oxidation and alleviates its inhibitory effect on SCR.

关键词： Copper modification Sb-CeZr₂O_x catalyst NO_x Methanol Simultaneous removal

HTML PDF 收藏

Dual-functional sites for synergistic adsorption of Cr(VI) and Sb(V) by polyaniline-TiO hydrate: Adsorption

《环境科学与工程前沿（英文）》 2022年第16卷第8期 doi: 10.1007/s11783-022-1526-7

摘要：

• PANI/Ti(OH)_n⁽⁴^–ⁿ⁾⁺ exhibited excellent adsorption capacity and reusability.

关键词： Polyaniline/TiO₂ Chromium Antimony Adsorption Desorption Mechanism

HTML PDF 收藏

Generation of enhanced stability of SnO/In(OH)/InP for photocatalytic water splitting by SnO protection

《能源前沿（英文）》 2021年第15卷第3期页码 710-720 doi: 10.1007/s11708-021-0764-x

摘要： InP shows a very high efficiency for solar light to electricity conversion in solar cell and may present an expectation property in photocatalytic hydrogen evolution. However, it suffers serious corrosion in water dispersion. In this paper, it is demonstrated that the stability and activity of the InP-based catalyst are effectively enhanced by applying an anti-corrosion SnO layer and In(OH)₃ transition layer, which reduces the crystal mismatch between SnO and InP and increases charge transfer. The obtained Pt/SnO/In(OH)₃/InP exhibits a hydrogen production rate of 144.42 µmol/g in 3 h under visible light illumination in multi-cycle tests without remarkable decay, 123 times higher than that of naked In(OH)₃/InP without any electron donor under visible irradiation.

关键词： SnO/In(OH)₃/InP photocatalyst enhanced activity and stability for water splitting corrosion inhibition enhancing charge transfer and decreasing crystal mismatch

HTML PDF 收藏

基于拓扑绝缘体Sb2Te3的52 nm宽谱可调谐被动调Q掺镱光纤激光器 Research

王涛1,俞强1,2,郭琨1,史鑫尧2,阚雪芬3,徐轶君4,5,吴坚1,4,张凯2,周朴1

《信息与电子工程前沿（英文）》 2021年第22卷第3期页码 287-436 doi: 10.1631/FITEE.2000577

摘要：拓扑绝缘体Sb2Te3具有从可见光到红外波段的宽谱可饱和吸收的优点。在本研究中，首先将拓扑绝缘体家族中的二维材料Sb2Te3可饱和吸收体应用在宽谱可调谐被动调Q掺镱光纤激光器中。高质量的Sb2Te3晶体通过选区熔炼法合成，进一步通过改进的机械剥离方法制备少层Sb2Te3可饱和吸收体。实验结果表明，Sb2Te3具有宽谱可饱和吸收特性，这个波长可调谐脉冲激光可以为实际应用提供一个方便简单的光源。

关键词：拓扑绝缘体；Sb2Te3；光纤激光；被动调Q激光；波长可调谐激光

HTML PDF 收藏

Multi-effect anthraquinone-based polyimide enclosed SnO/reduced graphene oxide composite as high-performance

《化学科学与工程前沿（英文）》 2023年第17卷第9期页码 1231-1243 doi: 10.1007/s11705-023-2306-z

摘要： The cycling stability of SnO₂ anode as lithium-ion battery is poor due to volume expansion. Polyimide coatings can effectively confine the expansion of SnO₂. However, linear polyimides are easily dissolved in ester electrolytes and their carbonyls is not fully utilized during charging/discharging process. Herein, the SnO₂ enclosed with anthraquinone-based polyimide/reduced graphene oxide composite was prepared by self-assembly. Carbonyls from the anthraquinone unit provide fully available active sites to react with Li⁺, improving the utilization of carbonyl in the polyimide. More exposed carbonyl active sites promote the conversion of Sn to SnO₂ with electrode gradual activation, leading to an increase in reversible capacity during the charge/discharge cycle. In addition, the introduction of reduced graphene oxide cannot only improve the stability of polyimide in the electrolyte, but also build fast ion and electron transport channels for composite electrodes. Due to the multiple effects of anthraquinone-based polyimide and the synergistic effect of reducing graphene oxide, the composite anode exhibits a maximum reversible capacity of 1266 mAh·g⁻¹ at 0.25 A·g⁻¹, and maintains an excellent specific capacity of 983 mAh·g⁻¹ after 200 cycles. This work provides a new strategy for the synergistic modification of SnO₂.

关键词： anthraquinone-based polyimide multi-effect tin dioxide reduced graphene oxide lithium-ion battery

HTML PDF 收藏

Spray-coated SnO

Yaqin Wang, Lin Yang, Chunxiang Dall’Agnese, Gang Chen, Ai-Jun Li, Xiao-Feng Wang

《化学科学与工程前沿（英文）》 2021年第15卷第1期页码 180-186 doi: 10.1007/s11705-020-1917-x

摘要： SnO has been proven to be an effective electron transport layer (ETL) material for perovskite solar cells (PSCs) owing to its excellent electrical and optical properties. Here, we introduce a viable spray coating method for the preparation of SnO films. Then, we employ a SnO film prepared using the spray coating method as an ETL for PSCs. The PSC based on the spray-coated SnO ETL achieves a power conversion efficiency of 17.78%, which is comparable to that of PSCs based on conventional spin-coated SnO films. The large-area SnO films prepared by spray coating exhibit good repeatability for device performance. This study shows that SnO films prepared by spray coating can be applied as ETLs for stable and high-efficiency PSCs. Because the proposed method involves low material consumption, it enables the low-cost and large-scale production of PSCs.

关键词： spray coating SnO₂ film ETL PSCs

HTML PDF 收藏

Comparison of masking agents for antimony speciation analysis using hydride generation atomic fluorescence spectrometry

Jianhong XI,Mengchang HE,Kunpeng WANG,Guizhi ZHANG

《环境科学与工程前沿（英文）》 2015年第9卷第6期页码 970-978 doi: 10.1007/s11783-014-0716-3

摘要： A sensitive atomic spectrometric method for the redox speciation analysis of Sb in water is described. The proposed method is based on the selective generation of stibine from Sb(III) in a continuous flow system using non-dispersive atomic fluorescence spectrometry for detection. The effects of the HCl concentration on the fluorescence intensities of Sb(III) and Sb(V) were investigated. The results indicated that atomic fluorescence emission due to Sb(V) can constructively interfere with the determination of Sb(III). For the determination of Sb(III), four compounds were tested as masking agents to inhibit the generation of stibine from Sb(V). The effects of the concentrations of the masking agents and of HCl on the fluorescence signals from Sb(III) and Sb(V) were studied. The results indicated that citric acid and NaF can successfully suppress hydride generation from Sb(V). To evaluate the developed methodology and the influence of the matrix, the recovery of Sb(III) from natural water that was spiked with different Sb(III) and Sb(V) concentrations was tested.

关键词： Sb(III) Sb(V) determination masking agents hydride generation (HG-AFS)

HTML PDF 收藏

Properties of Ag-doped Bi-Sb alloys as thermoelectric conversion materials for solid state refrigeration

Wen XU, Laifeng LI, Rongjin HUANG, Min ZHOU, Liyun ZHENG, Linghui GONG, Chunmei SONG

《能源前沿（英文）》 2009年第3卷第1期页码 90-93 doi: 10.1007/s11708-009-0005-1

摘要： The energy conversion properties of Bi-Sb system thermoelectric materials doped by Ag was investigated. Bi Sb Ag ( =0, 1, 2, 3, 4) alloys with Ag substitution for Sb were synthesized by mechanical alloying and then pressed under 5 GPa at 523 K for 30 min. The phase structure of the alloys was characterized by X-ray diffraction. The electric conductivities and the seebeck coefficients were measured at the temperature range of 80-300 K. The results reveal that the electric conductivities of the Ag-doped Bi-Sb alloys are highly improved. The power factor of Bi Sb Ag reaches a maximum value of 2.98×10 W/(K ?m) at 255 K, which is about three times that of the un-doped sample Bi Sb at the same temperature.

关键词： thermoelectric conversion materials high-pressure sintering thermoelectric properties

HTML PDF 收藏

锑元素与先天性心脏病关系的病例对照研究

林元,陈小玲,林晓文,刘敏,徐两蒲,何德钦,高丽素

《中国工程科学》 2014年第16卷第5期页码 73-78

摘要：

采用以院为基础的病例对照研究，在福建省妇幼保健院(三级甲等医院)募集新近发生的69 例胎儿先天性心脏病病例，以1∶1 配对的方法设立对照组，采用电感耦合等离子体质谱仪分析方法，测定病例组和对照组孕妇孕期头发中锑、锌、铜、铁、铅等元素的含量，并问卷调查孕早期危险因素的暴露情况，用SPSS19.0 Cox 比例风险模型进行流行病学多因素分析。孕妇发锑含量偏高(相对危险度的比值比(OR) =33.833；95 %可信区间(CI)：4.060～281.929)、孕期使用不锈钢餐具(OR=8.981，95 % CI：1.085～74.327)、居所周围50 m有马路(OR=11.067，95 % CI：1.025～119.521)是先天性心脏病的危险因素。孕期锑负荷增加可能是先天性心脏病的原因之一。

关键词：先天性心脏病锑元素病例对照研究调查问卷