CHEMOSPHERE
·
2020
·
IF 5.778
Yuancai Lv,Zhendong Yu,Siyi Huang,Fucai Deng,Kaiyun Zheng,Guifang Yang,Yifan Liu,Chunxiang Lin,Xiaoxia Ye,Minghua Liu
Considering the high environmental risk, the remediation of veterinary drug pollutants aroused numerous concerning. In this paper, a novel photocatlyst, SnO 2 /SnIn 4 S 8 , was fabricated by in situ precipitation and hydrothermal method and then employed to simulate photocatalytic degradation of olaquindox under visible light. The SEM, TEM, XRD, XPS and electrochemical results clearly showed that the n-type heterojunction between SnO 2 and SnIn 4 S 8 was successfully constructed, which greatly reduce the recombination of the photogenic electron and holes, leading to the improvement of photocalytic performance and stability (recycled over 10 times). Besides, the SnO 2 /SnIn 4 S 8 composite also exhibited good ability to mineralize the olaquindox. Under the optimal condition (pH of 3, 1 g L −1 of 30 wt% SnO 2 /SnIn 4 S 8 and 10 mg L −1 of initial olaquindox concentration), the olaquindox could be fully and rapidly degraded in 25 min, and completely mineralized in 2 h (99.3 ± 1.7%). LC-QTOF-MS analysis evidently displayed 10 intermediates during the olaquindox degradation. In addition, with the attack of the reactive oxygen species (h + , •OH and •O 2 − ), olaquindox could be effectively decomposed via deoxygenation , hydroxylation and carboxylation reactions. Importantly, compared to photodegradation , the photocatalytic process was an ideal way to eliminate the olaquindox form water because it could avoid the accumulation of toxic byproducts.
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 INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2015
·
IF 3.512
Na Cao,Xin Xie,Yu Zhang,Yanbao Zhao,Liuqin Cao,Lei Sun
Dendritic porous tin oxide/silica (DTS) nanospheres (NSs) were prepared by emulsion-condensation route. DTS NSs have an average diameter of 80 nm and possess accessible center-radial large pore channels, which endow them high surface area, less drug diffusion resistance and more mass transport. SnO 2 quantum dots (QDs) embedded in silica skeleton can be used to track the drug release behavior. DTS NSs were coated by chitosan/polymethacrylic acid and polymer shell would make them achieve great loading capacity and pH-sensitive release for aminomethylbenzoic acid (AMBA).
研究领域:
材料科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Chunxue Zhao,Caili Wang,Ying Qiu,Zhixue Wang,Guoxin Yao,Runquan Yang
In order to solve the problems of poor antistatic property of fly ash (FA), high cost and easy agglomeration of nano tin dioxide (TO), chemical co-precipitation method was adopted to synthesize nano-SnO 2 @fly ash (shell@core, TOFA) antistatic composite powder. Volume resistivity was used as indicator of TOFA antistatic performance to be experimentally studied. The results showed that volume resistivity was reduced from 7.32 × 10 9 Ω·cm (FA) to 1.82 × 10 5 Ω·cm (TOFA). Under pH = 4 condition, the electrostatic attraction between TO precursor and FA didn't significantly improve agglomeration. The pH = 12 condition of two substances surface repeled each other and relyed the interaction of TO precursor functional group and FA surface hydroxyl group on forming (Al)Si-O-Sn chemical bonding at high temperature calcination , which facilitated the formation of nanoscale tetragonal crystalline phase TO to uniformly distribute on the surface of micron-sized FA. The antistatic mechanism was derived from oxygen vacancies and tin interstitium in the intrinsic defects of TO nanoparticles .
研究领域:
材料科学
·
表面化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Microsystems & Nanoengineering
·
2020
·Vol. 6
·期 1
·1-13
·
IF 5.048
Zhu Li-Yuan,Yuan Kai-Ping,Yang Jia-He,Hang Cheng-Zhou,Ma Hong-Ping,Ji Xin-Ming,Devi Anjana,Lu Hong-Liang,Zhang David Wei
Highly sensitive and selective hydrogen sulfide (H 2 S) sensors based on hierarchical highly ordered SnO 2 nanobowl branched ZnO nanowires (NWs) were synthesized via a sequential process combining hard template processing, atomic-layer deposition, and hydrothermal processing. The hierarchical sensing materials were prepared in situ on microelectromechanical systems, which are expected to achieve high-performance gas sensors with superior sensitivity, long-term stability and repeatability, as well as low power consumption. Specifically, the hierarchical nanobowl SnO 2 @ZnO NW sensor displayed a high sensitivity of 6.24, a fast response and recovery speed (i.e., 14 s and 39 s, respectively), and an excellent selectivity when detecting 1 ppm H 2 S at 250 °C, whose rate of resistance change (i.e., 5.24) is 2.6 times higher than that of the pristine SnO 2 nanobowl sensor. The improved sensing performance could be attributed to the increased specific surface area, the formation of heterojunctions and homojunctions, as well as the additional reaction between ZnO and H 2 S, which were confirmed by electrochemical characterization and band alignment analysis. Moreover, the well-structured hierarchical sensors maintained stable performance after a month, suggesting excellent stability and repeatability. In summary, such well-designed hierarchical highly ordered nanobowl SnO 2 @ZnO NW gas sensors demonstrate favorable potential for enhanced sensitive and selective H 2 S detection with long-term stability and repeatability.
研究领域:
材料科学
·
传感器技术
·
纳米科技
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Ao Liu,Siyuan Lv,Li Jiang,Fangmeng Liu,Lianjing Zhao,Jing Wang,Xiaolong Hu,Zijie Yang,Junming He,Chenguang Wang,Xu Yan,Peng Sun,Kengo Shimanoe,Geyu Lu
In this work, we developed a NH 3 gas sensor based on polyaniline (PANI) composited with MoS 2 nanosheet-coated SnO 2 nanotubes (PMS) via electrostatic spinning, hydrothermal route and in-situ polymerization technique. The morphologies, nanostructures and compositions of the materials were obtained from X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Field emission scanning electron microscopy (FESEM), Transmission electron microscope (TEM) and Brunauer-Emmett-Teller method (BET). Thanks to nanostructure and the synergistic properties of PANI and MoS 2 /SnO 2 , the designed PMS gas sensor exhibited response signal of 10.9 towards 100 ppm NH 3 at room temperature and a low detection limit of 200 ppb with good response-recovery time, good repeatability, acceptable flexibility and excellent selectivity. This study offers a versatile platform to modify PANI for highly selective detection of NH 3 gas sensor at room temperature.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Sabarinathan Ravichandran,Narayanamoorthy Bhuvanendran,Shuhua Hao,Shirong Sun,Thandavarayan Maiyalagan,Huaneng Su,Xihong Zu,Wenli Zhang
This work shows that PANI-SnO 2 nanorods with unique morphology and fine distribution of Pd-Ni alloy nanoparticles exhibit superior electrocatalytic performance toward methanol oxidation reaction (MOR). The amount of Ni content in Pd x -Ni y /PANI-SnO 2 nanorods plays a key role in Pd utilization. Ni in Pd x -Ni y /PANI-SnO 2 catalyst significantly reduces the CO adsorption on the active catalyst surface and enhances the electrode kinetics . The Pd 3 Ni 1 /PANI-SnO 2 composite exhibits high mass activity (1861.9 mA mg −1 ) with extended stability even after 10000 cycles (∼90% retention) compared to other Pd x Ni y counterparts, Pd/PANI-SnO 2 , and commercial Pd/C catalysts. Interestingly, adding Ni along with SnO 2 improves the electronic effect of Pd metal, significantly enhancing its catalyst activity and stability. Based on the results, we hope the present work brings an innovative approach to constructing efficient and cost-effective electrocatalysts for electrooxidation methanol in an alkaline medium.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2016
·Vol. 163
·期 14
·H1144
·
IF 3.014
Li Xu,Yuefei Lian
A novel SnO2-Sb nanorods anode with Ti sheet as substrate (Ti/SnO2-Sb-NRs) was prepared through hydrothermal process. The Scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD) and the contact angle meter were used to characterize the physicochemical properties of the anodes. Additionally, the electrochemical properties and the stability were further studied by the electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), cyclic voltammetry (CV), chronoamperometry (CA) measurements and accelerated life test, respectively. These results indicated that Ti/SnO2-Sb-NRs anode possessed SnO2-Sb-NRs which were about 70 nm in width, as well as a better wettability, a lower charge transfer resistance, a larger current at constant potential and a longer lifetime than the conventional Ti/SnO2-Sb anode prepared by pulse electro-deposition. And the existence of direct oxidation on Ti/SnO2-Sb-NRs anode was confirmed. Electrochemical degradation of Acid Red 73 (AR 73) was investigated to study the electro-catalytic oxidation performance of the anodes. And the results showed that SnO2-Sb-NRs remarkably improved the degradation of AR 73, the chemical oxygen demand (COD) removal efficiency and the adsorption capacity on Ti/SnO2-Sb-NRs anode, which was probably due to the synergetic effects of SnO2-Sb-NRs.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 4
·3415-3423
·
IF 2.9
Shujuan Yin,Xueqian Zhang,Dongdong Liu,Xiaoxiao Huang,Yishan Wang,Guangwu Wen
Currently, it remains a challenge to make comprehensive improvements to overcome the disadvantages of volume expansion, Li2O irreversibility and low conductivity of SnO2. Heterostructure construction has been investigated as an effective strategy to promote electron transfer and surface reaction kinetics, leading to high electrochemical performance. Herein, NiO/SnO2 heterojunction modified nitrogen doped graphene (NiO/SnO2@NG) anode materials were prepared using hydrothermal and carbonization techniques. Based on the excellent structural advantages, sufficiently small NiO/SnO2 heterojunction nanoparticles increase the interfacial density to promote Li2O decomposition, and the built-in electric field accelerates the charge transport rate to improve the conductivity. The three-dimensional porous graphene framework effectively mitigates volume expansion during cycling and stabilizes the reactive interface of electrode materials. The results show that the NiO/SnO2@NG mixture has high reversible specific capacity (938.8 mA h g−1 after 450 cycles at 0.1 A g−1), superior multiplicity performance (374.5 mA h g−1 at 3.0 A g−1) and long cycle life (685.3 mA h g−1 after 1000 cycles at 0.5 A g−1). Thus, this design of introducing NiO to form heterostructures with SnO2 is directly related to enhancing the electrochemical performance of lithium-ion batteries (LIBs).
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
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Huimin Yang,Cheng Nan,Nan Gao,Wenjing Zhou,Fanfan Gao,Dai Dong,Danyang Dou,Yujie Liu,Zhenhai Liang,Donghua Yang
Photoelectrochemical nitrogen reduction (PEC NRR) provides a clean and sustainable method for the production of NH 3 under environmental conditions. However, low reaction efficiency remains a major challenge due to the presence of competitive hydrogen evolution reactions (HER). Herein, nanocomposites (SNP/MSO) with three-phase interface were prepared by loading hydrophilic SnO 2 nanoparticles (SNP) on hydrophobic MoS 2 (MSO) obtained by surface modification with silicomolybdic acid. The hydrophobic interface eliminated the transport barrier of N 2 in the liquid phase to the reaction center, inhibiting HER since the lowered contact area with the liquid proton. Meanwhile, the heterojunction structure formed between MSO and SNP accelerated the effective electron transfer . The synergistic effect of the triphase interface structure and electron transfer structure contributed to the high NH 3 yield (19.6 μg h −1 mg −1 ) and FE (40.34%) of SNP/10MSO in the photoelectrochemical system. Compared with the nanocomposites (SNP/MSI) prepared by hydrophilic MoS 2 , FE was significantly increased by 10 percentage points.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Xinxin Bian,Bowen Liu,Xiaolei Wang,Zhimin Chen,Rui Gong,Wanqi Jia,Zichen Song,Huiyuan Meng,Weibo Yin,Zhiyu Ren
Defects engineering is one of the effective strategies to advance the CO 2 conversion into value-added chemicals and fuels during the electrochemical process. It is noteworthy that multiple defects are often associated in the reaction process, hence how to stimulate their synergistic effect is extremely important, but still lacks in-depth understanding. Herein, SnO 2 nanosheets with simultaneous oxygen vacancies and Zn dopants (Zn–Vo–SnO 2 ), as a proof-of-concept study, were proposed to elucidate the synergistic effect of multiple defects on enhanced CO 2 -to-C 1 conversion. Zn–Vo–SnO 2 , which is prepared by coupling a facile hydrothermal reaction and a subsequent desulfurization, yields the C 1 products at the lower applied potential, and maintains the FE C1 of about 95% at −0.80 V vs. RHE for a long-term operation. Evidences from systematic experiment and theoretical calculation corroborate that the charge redistribution caused by the oxygen vacancies and Zn-doping synergistically energize the CO 2 conversion, in the term of the CO 2 adsorption, the hydrogenation of CO 2 and intermediates, and the thermodynamic energies of the rate-determining steps. This study has an insight into defect engineering to design advanced electrocatalysts for implementable CO 2 recycling and utilization.
研究领域:
材料科学
·
电化学
·
能源催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Xiaohui Yu,Lingyun Dai,Jiguang Deng,Yuxi Liu,Lin Jing,Xing Zhang,Xiyun Jiang,Zhiquan Hou,Jia Wang,Hongxing Dai
SnO 2 is widely used in catalysis owing to its oxygen vacancies, reducible oxygen species, and acidity. In this work, Ru nanoparticles (NPs) supported on three-dimensionally ordered macroporous (3DOM) SnO 2 ( x Ru/3DOM SnO 2 , Ru loading ( x ) = 0.09–1.65 wt%) were fabricated via the polyvinyl alcohol-protected reduction routes, and their catalytic activities were determined for trichloroethylene (TCE) and/or toluene oxidation. It was shown that the 0.98Ru/3DOM SnO 2 sample exhibited the best activity and good thermal stability, with the temperature ( T 90% ) and apparent activation energy at a TCE (1000 ppmv) conversion of 90% being 300 °C and 44 kJ/mol at space velocity = 40,000 mL/(g h), respectively. Trichloromethane, carbon tetrachloride, tetrachloroethylene, and trichloroacetaldehyde hydrate were the main intermediates in TCE oxidation. The high catalytic performance of 0.98Ru/3DOM SnO 2 was attributed to the presence of hydroxyl groups adsorbed at the oxygen vacancies, strong O 2 adsorption ability, good low-temperature reducibility, and strong interaction between Ru NPs and 3DOM SnO 2 . In addition, a catalytic mechanism over x Ru/3DOM SnO 2 was proposed under dry and humid conditions. The introduction of H 2 O could block some of the reaction pathways from inhibiting the production of C 2 Cl 4 , reduce formation of some by-products (e.g., CH 2 Cl 2 , CH 3 COOH, and C 2 H 2 Cl 2 ), promote removal of the chlorine species, and generate a greater amount of HCl and a smaller amount of Cl 2 . Furthermore, introducing toluene into the TCE stream could generate smaller amounts of organic chlorine by-products and greater amounts of inorganic chlorine products (HCl and Cl 2 ). We are sure that this work can provide a guideline for the industrial application of supported Ru catalysts in the removal of Cl-containing volatile organic compounds.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xuehua Chen,Chao Qin,Zicheng Zheng,Hanwen Chi,Zhizhen Ye,Liping Zhu
Gas sensors with good repeatability and controllable fabrication method are extremely desired for practical applications. Co-MOF-derived Co 3 O 4 is a promising gas-sensing material candidate because of its large surface area, ultrahigh porosities, and abundant oxygen defects. However, the advantages of Co-MOF precursor were limited by the traditional sensor fabrication methods. Moreover, the high resistance and poor surface activity of Co 3 O 4 resulted in low gas-sensing performance at room temperature (RT). To overcome these challenges, in-situ sensors based on Co 3 O 4 porous films with controlled nanoscale thickness were directly prepared on ceramic substrates by using Co-MOF films as precursors. To further improve the conductivity, SnO 2 catalytic overlayers were introduced on top of Co 3 O 4 sensors to construct SnO 2 /Co 3 O 4 bilayer sensors, which were promising for triethylamine (TEA) detection at RT. As a result, the optimized SnO 2 /Co 3 O 4 sensor exhibited a fast response/recovery rate (11 s/16 s), high selectivity, and a satisfactory sensitivity (150%) to TEA at RT. The enhanced gas-sensing performance could be attributed to the unique bilayer structures, improved conductivity, and synergistic effects of the SnO 2 catalytic overlayers and Co 3 O 4 sensing layers.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）