JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 4
·E69
·
IF 3.12
Li Xu,Ye Wang,Qiutong Xu,Huiying Duan
Ti/SnO2-Sb-Fe electrodes have been prepared by a novel precipitation printing method, the traditional sol-gel method, and the direct current deposition method. The microstructure of the electrodes was systematically characterized through X-ray diffraction (XRD) observation and high-resolution transmission electron microscopy (HRTEM) verification. In addition, the morphology was characterized by scanning electron microscopy (SEM), while the electrochemical properties and the stability were further investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and accelerated life testing. The results indicate that the Ti/SnO2-Sb-Fe electrode prepared by precipitation printing has the smallest nanoparticle structure (< 10 nm), a higher electrochemical porosity (49.6%), and a higher oxygen evolution potential (2.20 V). As a comparison, the Ti/SnO2-Sb-Fe electrode prepared by the sol-gel method has the longest service life. To further evaluate the electrocatalytic activity of the Ti/SnO2-Sb-Fe electrodes, Acid Red 73 was employed as simulated sewage for electrochemical degradation. After 180 min, the removal efficiency of AR 73 reached 86.8%, 63.4%, and 74%, respectively, for Ti/SnO2-Sb-Fe electrodes prepared by precipitation printing method, traditional sol-gel method, and direct current deposition method. Furthermore, the degradation of AR 73 followed pseudo-first-order kinetics.
研究领域:
材料科学
·
电化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 60
·37806-37814
·
IF 3.108
Anlin Xu,Xiang Dai,Kajia Wei,Weiqing Han,Jiansheng Li,Xiuyun Sun,Jinyou Shen,Lianjun Wang
The broad application of highly electrocatalytic SnO2–Sb electrodes for wastewater treatment is limited by their short service lifetime. Herein, a novel substrate structure, tubular porous titanium, was applied to prepare a TiO2-NT/SnO2–Sb electrode, which could greatly improve the stability of the electrode for electrochemical oxidation process. Based on the analysis conducted using a field emission scanning electron microscope (FE-SEM), linked with an energy dispersive spectrometer (EDS), it was demonstrated that a solid solution between Sn and Sb presented a smooth surface of the tubular porous electrode. The crystalline structure and chemical composition of the electrode coating are determined by X-ray diffraction (XRD). Accelerated service life test reveals that under the 0.2 A cm−2 current density in a 0.5 M H2SO4 solution, the TiO2-NT/SnO2–Sb tubular porous electrode has the longest accelerated service lifetime of 68.9 h, which is 10.9 times that of the TiO2-NT/SnO2–Sb plate electrode. Cyclic voltammetry curves (CVs) and linear sweep voltammetry curves (LSVs) reveal the enhanced electroactive surface area and higher oxygen evolution potential (OEP = 1.85 V vs. Ag/AgCl) of the electrode. Moreover, the TiO2-NT/SnO2–Sb tubular porous electrode has the larger outer voltammetric charge q*. During the electrochemical oxidation of pyrimidine, the tubular system constructed using the TiO2-NT/SnO2–Sb tubular porous electrode as the anode also exhibited best electrocatalytic performance, and 97.9% pyridimine removal efficiency and 79.4% COD removal efficiency at 6 h were achieved.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS TECHNOLOGY
·
2015
·
IF 1.227
Z. L. Zhang,M. L. Wang,Y. L. Mao
In this paper, heterojunction semiconductors of Sb-SnO2/TiO2 were prepared with varying molar ratios of Sb-SnO2 to TiO2. The separation efficiency of the photogenerated carriers was characterised by the surface photovoltage (SPV) technique, and the trap density was measured by an electrochemical method. The trap density was measured to be 7·48×1016, 6·01×1016, 5·43×1016, and 6·61×1016 cm−2 for TiO2 and Sb-SnO2/TiO2 films with molar ratios of 1, 2, and 3%, respectively. The SPV enhancement was estimated to be 1, 1·36, 7·64, and 6·36 for TiO2 and Sb-SnO2/TiO2 films with molar ratios of 1, 2, and 3%, respectively. The results indicate that SPV enhancement increases with decreasing trap density, which demonstrates that the trap density is an important factor affecting the separation efficiency of photogenerated carriers in heterojunction semiconductors.
研究领域:
材料科学
·
半导体物理
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qiaolin Ren,Wei Zhang,Wenjun Yan,Zhongde Wang
Electrochemical oxidation (ECO) technology has proven to be efficient for organic wastewater treatment. Given the strong demand for the development of anodes with superior stability, high activity, and low cost that can be applied industrially, herein, a stable Sb-doped Ti/RuO 2 -IrO 2 -SnO 2 electrode (SSE) is fabricated and served as an anode for the degradation of aniline using diverse power supply modes. The SSE shows better performance than the Ti/RuO 2 -IrO 2 -SnO 2 electrode (SE) in facilitating electron transport, enlarging the electrochemical active surface area, enhancing stability, and increasing electrocatalytic activity. Theoretical calculations reveal the stability and electronic properties of the synthesized electrodes. Furthermore, by degrading complex molecules and real wastewater, the practical industrial application of SSE is explored. Subsequently, the active species and possible degradation pathways are systematically elucidated. Therefore, this work provides a promising and superior-performance electrode with attractive application prospects for the high-efficient degradation of refractory organic wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 9
·092505
·
IF 3.9
Shuna Liu,Ben Yang,Anran Zuo,Yongming Tang
Ti/SnO2-Sb/PbO2 anodes were electrodeposited from methanesulfonate-based baths, and the effect of dopants such as PVP and Fe on the surface morphology, phase composition, electrocatalytic activity and stability was investigated. It is revealed that the inclusion of Fe effectively enhances the stability of PbO2 anode, while PVP can significantly improve its electrocatalytic activity. The Fe,PVP-codoped anode, Ti/SnO2-Sb/Fe-PVP-PbO2, exhibits the higher stability and electrocatalytic activity compared to the respective inclusion of Fe and PVP. The gradation efficiency of methyl orange (MO) on the Ti/SnO2-Sb/Fe-PVP-PbO2 anode is affected by the applied current density and the initial MO concentration. During degradation, the azo structure of MO is firstly cleaved, resulting in the rapid decolorization of solution. Demethylated MO and the anion of sulfanilic acid are detected as intermediates, and thus a plausible pathway of MO degradation is proposed.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Weikang Zheng,Zhenzhong Liu,Boyan Wang,Meijun Tao,Hongliang Ji,Xiaofang Xiang,Zhengguo Fu,Lili Liao,Peng Liao,Ronglong Chen
Microplastics have been identified as an emerging pollutant that poses a risk to the aquatic environment, and it is a challenge to find a suitable removal process. Electrocatalytic oxidation (ECO) technology has shown promising performance in removing various persistent organic pollutants. In this study, we prepared a new anode for removing polystyrene microplastics (PS MPs) by ECO. Ti/La-Sb-SnO 2 electrodes doped with the rare earth element La as the active layer were synthesized to enhance the electrocatalytic activity. The lifespan of the electrode was improved by doping Mn, Co, or Ru as an intermediate layer modification between the titanium (Ti) substrate and the La-Sb-SnO 2 active layer, respectively. The experimental results indicated that the addition of three types of intermediate layers led to different degrees of decrease in the catalytic activity of the electrode and the degradation performance of PS MPs. The addition of the Co intermediate layer had a negligible effect on the catalytic activity and performance of the Ti/La-Sb-SnO 2 anode for PS degradation. In addition, the electrode lifespan with Co intermediate layer was significantly prolonged, which was 4.54, 2.38, and 1.19 times higher than the electrode without intermediate layer and the electrode with Ru and Mn intermediate layer, respectively. Therefore, Co was determined to be the optimal choice as the intermediate layer, and the production technique for the Ti/La/Co-Sb-SnO 2 anodes was carefully adjusted. The degradation efficiency of PS MPs was optimized at a heat treatment temperature of 400 °C and a Sn: Co material ratio of 5:1, with a removal rate of 28.0 %. The ECO treatment also resulted in more pronounced changes in the structure and functional groups of the MPs. Various alkyl cleavage and oxidation products were detected after the treatment, suggesting that the oxidant (hydroxyl radicals) strongly interacted with the MPs, leading to their degradation. Overall, this work provided a new insight into removing MPs in water through the use of modified electrodes.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Chaocang Weng,Sumei Huang,Ting Lu,Junfeng Li,Jinliang Li,Jiabao Li,Likun Pan
Alloy-type materials are regarded as prospective anode replacements for lithium-ion batteries (LIBs) owing to their attractive theoretical capacity. However, the drastic volume expansion leads to structural collapse and pulverization, resulting in rapid capacity decay during cycling. Here, a simple and scalable approach to prepare NiM (M: Sb, Sn)/nitrogen-doped hollow carbon tubes (NiM C) via template and substitution reactions is proposed. The nanosized NiM particles are uniformly anchored in the robust hollow N -doped carbon tubes via Ni N C coordination bonds, which not only provides a buffer for volume expansion but also avoids agglomerating of the reactive material and ensures the integrity of the conductive network and structural framework during lithiation/delithiation. As a result, NiSb C and NiSn C exhibit high reversible capacities (1259 and 1342 mAh/g after 100 cycles at 0.1 A/g) and fascinating rate performance (627 and 721 mAh/g at 2 A/g), respectively, when employed as anodes of LIBs. The electrochemical kinetic analysis reveals that the dominant lithium storage behavior of NiM C electrodes varies from capacitive contribution to diffusion contribution during the cycling corresponding to the activation of the electrode exposing more NiM sites. Meanwhile, M (Sb, Sn) is gradually transformed into stable NiM during the de-lithium process, making the NiM C structure more stable and reversible in the electrochemical reaction. This work brings a novel thought to construct high-performance alloy-based anode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 20
·2214771
·
IF 19
Jun Pei,Jian-Lei Shi,Hezhang Li,Yilin Jiang,Jinfeng Dong,Hua-Lu Zhuang,Bowen Cai,Bin Su,Jincheng Yu,Wei Zhou,Bo-Ping Zhang,Jing-Feng Li
GeTe and (Bi,Sb) 2 Te 3 are two representative thermoelectric (TE) materials showing maximum performance at middle and low temperature, respectively. In order to achieve higher performance over the whole temperature range, their segmented one-leg TE modules are designed and fabricated by one-step spark plasma sintering (SPS). To search for contact and connect layers, the diffusion behavior of Fe, Ni, Cu, and Ti metal layers in GeTe is studied systematically. The results show that Ti with a similar linear expansivity (10.80 × 10 −6 K −1 ) to GeTe, has low contact resistance (3 µΩ cm 2 ) and thin diffusion layer (0.4 µm), and thus is an effective metallization layer for GeTe. The geometric structure of the GeTe/(Bi,Sb) 2 Te 3 segmented one-leg TE module and the ratio of GeTe to (Bi,Sb) 2 Te 3 are determined by finite element simulation method. When the GeTe height ratio is 0.66, its theoretical maximum conversion efficiency (η max ) can reach 15.9% without considering the thermal radiation and thermal/electrical contact resistance. The fabricated GeTe/(Bi,Sb) 2 Te 3 segmented one-leg TE module showed a η max up to 9.5% with a power density ≈ 7.45 mW mm −2 , which are relatively high but lower than theoretical predictions, indicating that developing segmented TE modules is an effective approach to enhance TE conversion efficiency.
研究领域:
材料科学
·
热电学
·
能量转换
·
固体物理
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Kangpeng Jin,Haonan Nie,Fengxian Gao,Jiang-Jiang Ma,Mingfang Shu,Xi Yan,Zhen-Hua Ge,Xiao Gao,Weiyun Zhao,Ming Liu,Yuan Yu,Jie Ma,Biao Xu,Liangwei Fu
Mg 3 (Sb,Bi) 2 alloys offer exceptional near-room temperature thermoelectric (TE) performance comparable to Bi 2 Te 3 . However, the low carrier mobility due to Mg vacancies and relatively high lattice thermal conductivity adversely affect overall TE performance. Herein, carrier mobility and thermal conductivity of Mg 3 (Sb,Bi) 2 are decoupled by modulating both the phase interface and grain boundaries through incorporating different sizes of iron (Fe). Ferromagnetic micrometer-sized Fe particles enhance the figure of merit ( ZT ) more than superparamagnetic nano-sized counterparts. Magnetic moments of Fe induce the charge density overlap near phase boundaries and ≈1 nm Fe interfacial layer lowers grain-boundary barriers, leading to sharply increased carrier mobility. Moreover, the additional magnon-phonon scattering reduces lattice thermal conductivity by over 40%. Consequently, Fe/Mg 3 (Sb,Bi) 2 composite achieves a high average ZT of 1.4 over room temperature to 573 K. The fabricated Mg 3 (Sb,Bi) 2 -CdSb module demonstrates a high conversion efficiency of 8.4% under a 275 K temperature gradient, among the best for Mg 3 (Sb,Bi) 2 -based modules. This work uncovers the role of thermo-electro-magnetic interactions in bolstering TE performance and inspires the development of low-cost, high-efficiency TE modules for low-grade heat recovery.
研究领域:
材料科学
·
物理学
·
能源科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 101
·57463-57475
·
IF 3.708
Tigang Duan,Ye Chen,Qing Wen,Ying Duan
A Ti/Sb–SnO2 electrode modified with titanium nitride (TiN) nanoparticles was prepared by the pulse electro-codeposition method. X-ray diffraction and scanning electron microscopy show that compared with Ti/Sb–SnO2, the Ti/Sb–SnO2–TiN electrode has a small unit cell volume of tetragonal SnO2 and a refined, compact particle film. X-ray photoelectron spectroscopy analysis shows that introducing titanium nitride nanoparticles facilitates the formation of Sb5+. And the adsorbed hydroxyl oxygen species content of Ti/Sb–SnO2–TiN (43.07%) is higher than that of Ti/Sb–SnO2 (21.85%), indicating that the Ti/Sb–SnO2–TiN electrode has more active sites for electrochemical oxidation of organic pollutants. In 0.25 M Na2SO4 solution, the charge transfer resistance of Ti/Sb–SnO2–TiN (150 ohm) is much smaller than that of Ti/Sb–SnO2 (1334 ohm). With a constant current density of 100 mA cm−2, the accelerated service lifetime of Ti/Sb–SnO2–TiN is improved significantly, which is 15.7 times as long as that of Ti/Sb–SnO2. The Ti/Sb–SnO2–TiN electrode is demonstrated to have a prominent ability for oxidative decolorization of methylene blue. The results also confirm that the Ti/Sb–SnO2–TiN electrode has a higher decolorization efficiency and kinetic rate constant, which are 1.54 and 3.24 times as efficient as those of Ti/Sb–SnO2, respectively.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2025
·
IF 9.3
Ziming Zhang,Chen Ming,Qingfeng Song,Lei Wang,Hanbing Chen,Jincheng Liao,Chao Wang,Lidong Chen,Shengqiang Bai
Mg 3 (Sb,Bi) 2 -based Zintl compounds are rising stars with superior features of high thermoelectric (TE) performance, nontoxicity and low cost. However, the poor thermodynamic stability hinders its practical application. Here, we propose a design strategy of modulating the local chemical composition with grain boundary (GB) phase guided by computational phase equilibrium diagrams. By in-situ constructing ZrSb 1- x second phase in the GB regions of Mg 3 (Sb,Bi) 2 -based compounds, the migration of Mg is blocked and the Mg deletion is depressed. Benefit from these, the driving force of Mg diffusion from matrix to GB and Mg migration along GBs is weakened, resulting in an improved thermal stability without degradation of electrical transport properties. The fabricated 8-pair TE module using GB modulated n-type Mg 3.1 Sb 1.5 Bi 0.49 Te 0.01 and p-type Ge 0.89 Cu 0.06 Sb 0.08 Te presents an efficiency of 8.9 % under the temperature difference of 450 K and shows excellent durability in the thermal cycling test. This study provides an effective strategy to improve thermal stability by constructing GB phase, and proves the feasibility of the practical application for Mg 3 Sb 2 -based TE modules.
研究领域:
材料科学
·
热电材料
·
固态化学
·
计算材料学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2020
·
IF 5.715
Jixian Yang,Lu Zhou,Fang Ma,Heping Zhao,Fengxia Deng,Shanshan Pi,Aiqi Tang,Ang Li
The extracellular polymeric substances coating magnetic powders-supported nano zero-valent iron (nZVI@EPS@Fe 3 O 4 ) was synthesized, using reduction and adsorption to treat Sb(V) wastewater. The adsorption performance and mechanism were investigated under aerobic and anaerobic conditions. The adsorption capacity of nZVI@EPS@Fe 3 O 4 (79.56 mg/g at pH = 5) was improved compared to that of the original materials (60.74 mg/g). The spectral analysis shows that both nZVI and EPS@Fe 3 O 4 in nZVI@EPS@Fe 3 O 4 played an important role in reducing Sb(V) to Sb(III) and adsorbing Sb. The reducibility and adsorption capacity of nZVI@EPS@Fe 3 O 4 towards Sb(V) remained strong under aerobic condition (62% Sb(III), 79.56 mg/g), although they were slightly weaker than those under anaerobic condition (74% Sb(III), 91.78 mg/g). nZVI@EPS@Fe 3 O 4 showed good performance in regeneration experiments. nZVI@EPS@Fe 3 O 4 is promising as a cost-effective and highly efficient material for Sb(V)-contaminated water. This study is meaningful in understanding the redox behaviour of nZVI composites in aerobic and anaerobic conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）