Functional Materials Letters
·
2021
·
IF 2.17
Chol-Nam Ri,Jong-Su Ri,Kwang-Ho Ju
In this paper, the effect of Sb 2 O 3 doping on the sintering and polarization stability of PbTiO 3 ceramics was investigated. The Sb 2 O 3 -doped PbTiO 3 ceramic materials were prepared via a conventional piezoelectric ceramic processing. The results showed that the as-prepared PbTiO 3 ceramics exhibit a good sintering stability without cracking during sintering because of reducing spontaneous strain stemmed from decrease the tetragonal degree of PbTiO 3 by Sb 2 O 3 doping. Furthermore, the polarization stability of Sb 2 O 3 -doped PbTiO 3 ceramics was considerably enhanced by the relaxation of strain and stress concentration during poling stemmed from the formation of good microstructure with fine grain and high density, and by decreasing the loss stemmed from reduction of oxygen vacancy concentration due to the substitution of Sb 5 + ions for Ti 4 + ions under a polarization condition with temperature of 130–150 ∘ C and applied electric field of 4.5–5.5 kV/mm, and its yield of polarization is achieved ca. 80%.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Water
·
2024
·Vol. 16
·期 12
·1690
·
IF 3
Jingjing Yang,Jie Zhang,Jintong Liu,Quanxin Yang,Bingdang Wu,Xiaoyi Xu,Tianyin Huang
In order to recover the antimony from wastewater, a custom-designed fluidized-bed reactor (FBR) was employed to treat antimony-containing wastewater. By single-factor experiments, the effects of the solution pH, the molar ratio of [TA]/[Sb3+], the seed size and dosage, the up-flow velocity (U), and the hydraulic retention time (HRT) on antimony recovery were investigated based on the antimony removal and granulation efficiency. The optimum conditions for antimony recovery were obtained at pH 9.0, the molar ratio of [TA]/[Sb3+] of 2, 6 g/L of 13–38 μm Sb2O3as the fluidized seed, and the U and HRT of 42 m/h and 40 min, respectively; the antimony removal and granulation efficiency reached 95% and 91%, respectively. The granular products were analyzed by an X-ray polycrystalline diffractometer (XRD) and scanning electron microscopy (SEM) as cubic Sb2O3, widely used in various industries. The fluidized-bed reactor was operated continuously for 7 days, during which the antimony removal and granulation efficiency were stable at 96% and 93%, respectively. This study demonstrated the feasibility of the fluidized-bed granulation process for the recovery of antimony from wastewater. It provides a novel approach for retrieving and managing antimony-containing wastewater.
研究领域:
环境工程
·
材料科学
✓ 已验证
DOI
高影响因子
Metals
·
2025
·Vol. 15
·期 5
·478
·
IF 2.5
Honglei Tan,Jia Yang,Zhaofeng Cui,Renjie Tan,Teng Li,Baoqiang Xu,Shaoyuan Li,Bin Yang
We prepared antimony metal films via electrodeposition, followed by the synthesis of Sb2S3films through a chemical vapor phase reaction. Finally, an Sb2O3film was deposited onto the Sb2S3film using a chemical bath method, successfully constructing a heterojunction photocathode of Sb2S3/Sb2O3; the synthesized Sb2S3/Sb2O3heterojunction is classified as a Type I heterostructure. The resulting Sb2S3/Sb2O3heterojunction exhibited a photocurrent density of −0.056 mA cm−2at −0.15 V (vs. RHE), which is 1.40 times higher than that of Sb2S3alone under simulated solar illumination. Additionally, the Sb2S3/Sb2O3heterojunction demonstrated a lower carrier recombination rate and a faster charge transfer rate compared to Sb2S3, as evidenced by photoluminescence and electrochemical impedance spectroscopy tests. For these reasons, the Sb2S3/Sb2O3heterojunction obtained a hydrogen precipitation rate of 0.163mL cm−2h−1, which is twice the hydrogen precipitation rate of Sb2S3, under the condition of 60 min of light exposure. The significant enhancement in photoelectrochemical performance is attributed to the formation of the Sb2S3/Sb2O3heterojunction, which improves both carrier separation and charge transfer efficiency. This heterojunction strategy holds promising potential for visible light-driven photoelectrochemical water splitting.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yongheng Du,Yanfeng Zhang,Ling Li,Ning Wang,Yujun Chai
The combination of Sb 2 O 3 or SnO 2 with graphene has become a research hotpot in recent years. However, several problems, namely the loading of the active materials, space utilization in composites, and the intrinsic volume expansion of Sb 2 O 3 and SnO 2 , have yet to be fully resolved. To overcome these disadvantages, in this work Sb 2 O 3 /carbon nanotubes (CNTs)/SnO 2 composite have been synthesized, in which the CNTs act as a network to ensure the electronic conductivity and buffer of the volume expansion. The SnO 2 nanoparticles are aligned by the CNTs and Sb 2 O 3 is dispersed in the voids between them. Space utilization and the loading of the oxides are thereby maximized. Moreover, the resultant composite retains small amount of water or alcohol, which does not affect the cyclic stability, but may have increased the ionic and electronic conductivity, improving the electrochemical performance. A discharge capacity of 910 mAh g −1 after 250 cycles at 100 mA g −1 is realized for Sb 2 O 3 /CNT/SnO 2 . Moreover, the contribution of the pseudocapacitance to the rate discharge capability is obvious, which arises from the different heterointerfaces between Sb 2 O 3 /CNTs, CNTs/SnO 2 or Sb 2 O 3 /SnO 2 . The homogenous distribution of Sn and Sb in CNTs after cycling leads to a lower discharge voltage, improving the application prospects. Although some collapse and cracks are detected, the CNTs network connects the oxides, ensuring the structural stability and the cyclic stability of Sb 2 O 3 /CNT/SnO 2 . This strategy represents a new concept for the design of multi-component materials for lithium storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Jiao Yang Lu,Zhen Qi Bu,Yu Qing Lei,Donghua Wang,Binsheng He,Jing Wang,Wei Tao Huang
Recently, bimetallic nanocomposites have been prepared and used in the fields of sensing, catalysis, energy and medicine. However, there are few reports on the preparation and application of new antimony-metal nanocomposites based on two-dimensional antimonene (AM). Herein, Sb 2 O 3 -CuO nanocomposites were facilely synthesized by using microwave-assisted heating the mixture solution of AM and Cu 2+ ions and utilized for catalytic degradation of p-nitrophenol (PNP). Interestingly, in the mixed solution of AM and various metal ions (Cu 2+ , Co 2+ , Mn 2+ ), only the mixture of AM and Cu 2+ ions showed efficient fading and absorption reduction effects on PNP after being heated. A series of characterization on morphology and elemental composition confirmed that the nanocomposites obtained after microwave heating was composed of Sb, Cu, O elements (namely Sb 2 O 3 -CuO), and was a layered structure loaded with numerous irregular particles. Compared with other catalysts, the nanocomposite has higher catalytic efficiency (the rate constant of 1.07 s −1 ), and was capable of degrading 96 % of PNP with only 3 s reaction. Electron spin resonance spectroscopy and liquid chromatography-mass spectrometry analysis demonstrated that the copper-mediated Fenton-like reaction in the nanocomposites induced hydroxyl radicals which can efficiently attack and degrade PNP. This study presents a novel approach to the synthesis of antimony-metal nanocomposites and provides a potential solution for the treatment of organic pollutants.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiaozhong Zhou,Zhengfeng Zhang,Xiaofang Lu,Xueyan Lv,Guofu Ma,Qingtao Wang,Ziqiang Lei
Sb2O3 nanoparticles are uniformly anchored on reduced graphene oxide (rGO) sheets via a facile and ecofriendly route based on the alcohol dissolution–reprecipitation method. Such obtained Sb2O3/rGO composite demonstrates a highly reversible specific capacity (1355 mA h g–1 at 100 mA g–1), good rate capability, and superior life cycle (525 mA h g–1 after 700 cycles at 600 mA g–1) when used an anode electrode for lithium-ion batteries (LIBs). The outstanding electrochemical properties of Sb2O3/rGO composite could be attributed to its unique structure in which the strong electronic coupling effect between Sb2O3 and rGO leads to an enhanced electronic conductivity, structure stability, and electrochemical activity during reversible conversion-alloying reactions. Also, these findings are helpful in both developing novel high-performance electrodes for LIBs and synthesizing functional materials in an ecofriendly and economical way.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2020
·Vol. 16
·期 7
·1907172
·
IF 11.459
Mengqi Xiao,Huai Yang,Wanfu Shen,Chunguang Hu,Kai Zhao,Qiang Gao,Longfei Pan,Liyuan Liu,Chengliang Wang,Guozhen Shen,Hui-Xiong Deng,Hongyu Wen,Zhongming Wei
Structural symmetry is a simple way to quantify the anisotropic properties of materials toward unique device applications including anisotropic transportation and polarization-sensitive photodetection. The enhancement of anisotropy can be achieved by artificial symmetry-reduction design. A core–shell SbI 3 /Sb 2 O 3 nanowire, a heterostructure bonded by van der Waals forces, is introduced as an example of enhancing the performance of polarization-sensitive photodetectors via symmetry reduction. The structural, vibrational, and optical anisotropies of such core–shell nanostructures are systematically investigated. It is found that the anisotropic absorbance of a core–shell nanowire is obviously higher than that of two single compounds from both theoretical and experimental investigations. Anisotropic photocurrents of the polarization-sensitive photodetectors based on these core–shell SbI 3 /Sb 2 O 3 van der Waals nanowires are measured ranging from ultraviolet (UV) to visible light (360–532 nm). Compared with other van der Waals 1D materials, low anisotropy ratio ( I max / I min ) is measured based on SbI 3 but a device based on this core–shell nanowire possesses a relatively high anisotropy ratio of ≈3.14 under 450 nm polarized light. This work shows that the low-symmetrical core–shell van der Waals heterostructure has large potential to be applied in wide range polarization-sensitive photodetectors.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Chen-Wei Shan,Hui-Ting Hu,Zhencheng Chen,Guo-Cheng Han,Xiao-Zhen Feng,Heinz-Bernhard Kraatz
Quercetin (Qu) is a natural pentahydroxyflavone that is thought to counteract oxidative cell damage by acting as an effective free radical scavenger, exhibits estrogenic and anticancer activities. Therefore, it is important to detect the content of Qu and study its electrooxidation mechanism. Here, we prepared Sb 2 O 3 @MWCNTs/GCE sensors based on block-shaped antimony oxide (Sb 2 O 3 ) and multi-walled carbon nanotubes (MWCNTs), and Pyrrole/CoNPs/GCE sensors with pyrrole and flower-shaped cobalt nanoparticles (CoNPs), respectively, for ultrasensitive detection of Qu, as these modified nanocomposites have excellent catalytic effect towards Qu. In contrast, the second sensor allowed ultrasensitive detection of Qu and had a wider linear range (0.10–100.00 μmol·L −1 ), a detection limit of 0.033 μmol·L −1 and a sensitivity of 8.98 µA·μmol·L −1 ·cm −1 . In addition, both sensors showed good repeatability, stability and selectivity. The recoveries of antioxidant Qu in ginkgo biloba by these two sensors ranged from 95.50 to 103.86 %, and the Qu accounted for 35.60 % and 39.57 % of the flavonol glycosides (19.20 mg) in the tablets. These studies demonstrate the potential application of both sensors in practical assays.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2020
·Vol. 24
·期 3
·545-555
·
IF 2.646
Pan Yufu,Luo Yanfang,Li Chengcheng,Wang Rongjing,Yuan Yihao,Li Meng,Na Ping
The present study focused on the preparation, characterization, and application of cerium (Ce) and neodymium (Nd) co-doped lead (PbO 2 ) electrode, i.e., Ti/SnO 2 -Sb 2 O 3 /α-PbO 2 /Ce-Nd-β-PbO 2 . The electrochemical activities of the modified electrode were investigated and compared with those of Ce-PbO 2 , Nd-PbO 2 , and pure PbO 2 electrodes. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the surface morphology, crystal structure, and elemental states of the modified electrode. The Ce and Nd co-doped PbO 2 electrode had smaller crystal particles, more compact structure, and higher activity of electrocatalysis compared with the single-doped and undoped PbO 2 electrodes. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) were also utilized to study the electrochemical response of the modified electrodes. The results show that the prepared Ce-Nd-PbO 2 electrode has the highest O 2 evolution potential (OEP) and lowest charge transfer resistance, suggesting that it has the lower energy consumption than the other three kinds of electrodes. Electrochemical oxidation methyl orange (MO) as a model dye wastewater was studied to evaluate the potential applications of this modified electrode in environmental science. It was found that the Ce-Nd-PbO 2 electrode exhibited higher MO and chemical oxygen demand (COD) removal efficiency than single-doped and pure PbO 2 electrodes.
研究领域:
环境科学
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiangchao Hui,Lifen Li,Qineng Xia,Song Hong,Leiduan Hao,Alex W. Robertson,Zhenyu Sun
The direct photochemical N 2 reduction reaction boasts the potential for clean and sustainable NH 3 manufacturing, yet achieving this remains a significant challenge. To activate and cleave the nonpolar N≡N bond and accelerate the transport and separation of charge carriers during photocatalysis , the design and facile synthesis of active, robust, cheap, and earth-abundant photocatalysts is crucial. Here, we demonstrate efficient and stable visible light fixation of N 2 to NH 3 by constructing a novel heterostructure consisting of two-dimensional Sb 2 O 3 nanosheets and one-dimensional W 18 O 49 nanowires . A remarkable NH 3 production rate of up to 731 μg NH3 h −1 g cat. −1 is attained in visible light over the nanocomposite without cocatalyst, 5.5-fold and 3.4-fold improvement over that of discrete Sb 2 O 3 and W 18 O 49 respectively, which also significantly exceeds many previous reported photocatalytic systems. The superior photocatalytic performance can be attributed to the unique structure of the composites, which provides ample exposed surface catalytic sites with a high density of oxygen vacancies, promoting the adsorption and activation of N 2 molecules to form *NNH. Equally importantly, the interface between Sb 2 O 3 and W 18 O 49 greatly facilitates charge carrier migration and separation. Further density functional theory calculations manifest that the interfacial metal sites on Sb 2 O 3 /W 18 O 49 serve as the main active centers which possess a strong donating electron ability to the empty N 2 antibonding orbitals to trigger the following NH 3 synthesis. This work provides a simple and effective method to modify metal oxides for enhancing N 2 photofixation.
研究领域:
材料科学
·
催化
·
光化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Wei Wu,Wen He,Duoduo Ling,Lei Chen,Yinze Zhang,Xiangqian Fan,Yanghao Bi,Dongbo Wang,Jinzhong Wang
Self-powered broadband photodetectors (SPBDs) have received widespread attention due to their significant applications in optical communication, remote sensing, and imaging. Vertical heterojunctions are promising for SPBDs due to their efficient photogenerated carrier separation and high integration density. However, certain band alignments at the interface can drive carriers to recombine that undermines the former advantage. Here, a SPBD based on the Bi 2 Te 3 /Sb 2 O 3 /p-Si vertical heterojunction is developed that introduces the Sb 2 O 3 as a carrier blocking layer and achieves improved self-powered photoresponse than Bi 2 Te 3 /p-Si. A one-step electron beam evaporation approach is adopted to deposit a narrow-bandgap optical-active layer Bi 2 Te 3 and a blocking layer Sb 2 O 3 on p-type Si substrates. Such photodetector exhibits detection performance across a broad response band of UV–vis–NIR (254–1050 nm). Owing to the built-in electric field within the heterojunction, the blocking effect and the photovoltaic effect induced by the Sb 2 O 3 layer, the detector achieves high responsivity (316.5 mA·W −1 ), detectivity (6.19 × 10 11 Jones) and fast rise and decay times (24.6/25.1 ms). Furthermore, the device exhibits excellent imaging capabilities for UV, visible, and near-infrared light patterns. The work presents a SPBD using Bi 2 Te 3 -based vertical heterostructure and proposes a novel and instructive performance-enhancing approach using a metal oxide layer based on carrier blocking layer engineering.
研究领域:
材料科学
·
光电子学
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Yao Xinyun,Zuo Jiaqi,Wang Yu-Jue,Song Ning-Ning,Li Huang-Hao,Qiu Kaipei
Perfluorooctanoic acid (PFOA), a typical perfluorinated carboxylic acid, is an emerging type of permanent organic pollutants that are regulated by the Stockholm Convention. The degradation of PFOA, however, is quite challenging largely due to the ultra-high stability of C-F bonds. Compared with other techniques, photocatalytic degradation offers the potential advantages of simple operation under mild conditions as well as exceptional decomposition and defluorination efficiency. Titanium dioxide (TiO2) is one of the most frequently used photocatalysts, but so far, the pristine nanosized TiO2 (e.g., the commercial P25) has been considered inefficient for PFOA degradation, since the photo-generated hydroxyl radicals from TiO2 are not able to directly attack C-F bonds. Mesoporous Sb2O3/TiO2 heterojunctions were therefore rationally designed in this work, of which the confined Sb2O3 nanoparticles in mesoporous TiO2 framework could not only tune the band structure and also increase the number of active sites for PFOA degradation. It was found that, after loading Sb2O3, the absorption of UV light was enhanced, indicating a higher efficiency of light utilization; while the band gap was reduced, which accelerated the separation of photo-generated charge carriers; and most importantly, the valence band edge of the Sb2O3/TiO2 heterojunction was significantly lifted so as to prevent the occurrence of hydroxyl radical pathway. Under the optimal ratio of Sb2O3–TiO2, the resulting catalysts managed to remove 81.7% PFOA in 2 h, with a degradation kinetics 4.2 times faster than the commercial P25. Scavenger tests and electron spin resonance spectra further revealed that such improvement was mainly attributed to the formation of superoxide radicals and photo-generated holes, in which the former drove the decarboxylation from C7F15COOH–C7F15•, and the latter promoted the direct electron transfer for the conversion of C7F15COO−–C7F15COO•. The Sb2O3/TiO2 photocatalysts were highly recyclable, with nearly 90% of the initial activity being retained after five consecutive cycles, guaranteeing the feasibility of long-term operation.
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
危险品化学品经营许可证（带存储）