FERROELECTRICS
·
2019
·
IF 0.697
Jun Liu,Yuguo Zhuo,Zefeng Zhang,Qingshan Li,Xiaofeng Guo,Xuejun Ren
TiO2/WPU/PVA nanofibers were prepared by electrospinning with modified nano-TiO2, waterborne polyurethane (WPU) and polyvinyl alcohol (PVA) as main materials that were blended mechanically. The nanofibers morphologies and physical states were investigated using scanning electron microscopy (SEM), thermogravimetry analysis (TG), Fourier transform infrared (FTIR) spectroscopy and UV-visible (UV-Vis) spectroscopy. Scanning electron microscopy observations revealed that nano-TiO2 was modified by r-aminopropyltriethoxysilanehe in order to improve the dispersion of nano-TiO2 in WPU/PVA matrix and the spinning quality of composite fibers was improved by adding proper amount of modified nano-TiO2. When the content of modified nano-TiO2 was 1%, the composite fibers with uniform diameter distribution were obtained. Results from FTIR and TG suggested that modified nano-TiO2 had been successfully introduced to the WPU/PVA nanofibers and TiO2/WPU/PVA nanofibers had the best thermal stability when the content of modified nano-TiO2 was 1%. Results from UV-Vis suggested that the photocatalytic performance of composite nanofibers that degraded methyl orange was enhanced by the addition of modified nano-TiO2.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Shuang Wang,Shupeng Zhang,Maoxiang Liu,Haiou Song,Juanjuan Gao,Yueyue Qian
A novel MoS 2 -NiCo 2 O 4 architecture with highly sensitive determination toward glucose is constructed successfully in this work. MoS 2 nanosheets are regarded as clever connectors to connect NiCo 2 O 4 nanoplates together, which would inspire the electrocatlytic performance of NiCo 2 O 4 nanoplates acted as active sites greatly. The interesting nanostructure and composition were confirmed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy, etc. Rational incorporation of MoS 2 as an electron collector can promote the formation of conductive chains among the NiCo 2 O 4 nanoplates, accompanying with inhibiting of NiCo 2 O 4 aggregation. The conductive path can accelerate the charge transfer significantly. The MoS 2 -NiCo 2 O 4 modified GCE exhibits enhanced electrocatalytic activity toward the oxidation of glucose, compared with NiCo 2 O 4 nanoplates. At a potential of +0.418 V, the fabricated biosensor demonstrates a wide detection range with high sensitivity (1748.58 μAmM −1 cm −2 ) and a low detection limit of 0.152 μM. It also shows anti-interference for ascorbic acid, uric acid, dopamine and chloride ion. Besides, it owns good reproducibility, repeatability and long-term stability. Excellent catalytic oxidation performance for glucose supports that MoS 2 -NiCo 2 O 4 hybrid is an outstanding and promising electrode material toward glucose biosensor.
研究领域:
材料科学
·
生物传感器
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2017
·Vol. 5
·期 2
·481-489
·
IF 4.036
Wanbao Wu,Xu Li,Zhaohui Ruan,Yudong Li,Xianzhu Xu,Yuan Yuan,Kaifeng Lin
A TiO2 trapped meso/macroporous g-C3N4 heterojunction (mm-CNT) photocatalyst is fabricated by hydrolysis and sintering of tetrabutyl titanate on meso/macroporous g-C3N4 prepared via a facile hard template method. TiO2 nanoparticles are highly dispersed and some of them are trapped in the pores of meso/macroporous g-C3N4. The photocatalytic performance of mm-CNT is assessed through degradation of Rhodamine B solution under visible light irradiation, which displays much better photocatalytic performance than that over pristine meso/macroporous g-C3N4 and pristine g-C3N4. Based on the characterization results, it is reasonable to believe that the enhanced photocatalytic activity should be attributed to the unique meso/macroporous architecture and heterojunction structure, which results in improved mass transfer and enhances the separation efficiency of exciton dissociation. Besides, an optical simulation is initially utilized to study the optical absorption characteristics of mm-CNT since the optical absorption ability of a photocatalyst is one of the most important aspects influencing the photocatalytic ability. As a result, the enhanced ability of light absorption observed on the heterojunctions should be also favorable to achieve improved photocatalytic performances. On account of the analysis results, a possible photocatalytic mechanism for enhanced visible light photocatalytic activity is proposed.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 18
·23189-23205
·
IF 2.478
Chen Piao,Zhang Zhi,Yang Shuijin,Yang Yun,Sun Yong
In this study, a novel oxygen vacancy-rich BiOCl/ZnMoO 4 composites were successfully prepared by a simple two-step method. Experimental results indicated that the content of BiOCl with oxygen vacancies played an important role in photocatalytic performance of OBZM heterostructures. OBZM-5 exhibited a highly enhanced photocatalytic activity under visible light irradiation compared to pure BiOCl, Ov-BiOCl, ZnMoO 4 and other OBZM composites, which can be attributed to the efficient separation and transfer of photogenerated charge carrier. The photocatalytic degradation efficiency of rhodamine B (RhB) can reach 99% within 40 min and almost all of norfloxacin (NOR) can be degradated after 100 min by OBZM-5. In addition, OBZM-5 displayed a good stability during the photocatalytic process, which favored a long-term use. Moreover, a possible photocatalytic mechanism was proposed based on the active species trapping experiments and electron spin resonance (ESR) tests, verifying that the photogenerated holes (h + ) and · O 2 − radicals were the dominating active species.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 4
·977-985
·
IF 5.6
Tingting Wen,Limin Wang,Yaqiong Gong
Design and synthesis of a highly efficient OER catalyst is the key to improve the efficiency of hydroelectrolysis for hydrogen production. In this paper, a rational approach to improve the catalytic performance of CoMoO4 nanomaterial was reported. A nanoflower structured CoMoO4 precursor was synthesized on nickel foam using a typical hydrothermal method. Then, CoMoO4/NF was etched through brief immersion in iron nitrate solution at room temperature to produce FeOOH–CoMoO4/NF. The unique 3D structure of FeOOH–CoMoO4/NF could availably promote interfacial electron transfer as well as effectively provide abundant active sites, and it exhibited excellent electrocatalytic activity. FeOOH–CoMoO4/NF requires an overpotential of 209 mV to achieve a current density of 10 mA cm−2. Meanwhile, the material FeOOH–CoMoO4/NF exhibits excellent catalytic durability of up to 24 h, which is promising for practical applications in energy conversion. Thus, this work may offer a viable strategy to assemble remarkable OER electrocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bingke Xie,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
Nitrogen oxide (NOx) removal has long been a subject that has motivated researchers to develop a diverse range of techniques, including physical adsorption, biofiltration, low temperature plasma, selective catalytic reduction, and photocatalytic oxidation. In this work, Cs 3 Bi 2 Br 9 lead-free perovskite was synthesized via in-situ growth on a 3D flower-like g-C 3 N 4 microsphere, which uses a series of Cs 3 Bi 2 Br 9 /g-C 3 N 4 (labeled as X% CBB/CN, where X = 5, 10, 20, 30, and 50) heterojunctions for the photocatalytic removal of NOx. The efficiency of NO removal was enhanced considerably, compared with that of the pristine elements, when irradiated with a 300 W Xe lamp with the concentration of NO at the ppb level. The results of photocurrent measurements and electrochemical impedance spectroscopy are consistent with the results of the NO removal test. Electron spin resonance results verified that ⋅OH and ⋅O 2 − are formed under visible light irradiation. We report the detailed mechanism for the photocatalytic process of NO removal by CBB/CN heterojunctions and provide insights into the potential applications of lead-free perovskite-based heterostructures in the field of photocatalysis.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Fan Fu,Jian Yang,Hao Xu,Yang Li,Shaobo Cao,Kang Da,Wenting Chen,Ximei Fan
Doping or constructing heterojunctions by coupling with other semiconductors are effective methods to improve the photocatalytic performance of graphitic carbon nitride (g-C 3 N 4 ) in toluene degradation. Herein, thermally condensed synthesized K-doped g-C 3 N 4 (KCN) is coupled with BiOCl via a hydrothermal method, and KCN/BOC heterostructures are obtained. The optimal KCN 1 /BOC heterojunction exhibits approximately 85% removal of toluene after 150 min irradiation under simulated solar light, which is 12.4 and 9.6 times higher than those of g-C 3 N 4 and BiOCl, respectively. The superior performance of KOH-modified g-C 3 N 4 is attributed to the electron transfer channels formed by the insertion of K + into the g-C 3 N 4 layers, which facilitate efficient charge separation and rapid electron transfer. Furthermore, the KCN/BOC heterostructure with the Z-scheme further improves the surface charge separation efficiency, which plays a critical role in the photocatalytic process. This work provides a facile and promising strategy for dual-strategy modification of g-C 3 N 4 to enhance photocatalytic degradation activity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Guangxin Zhang,Shilin Li,Yifei Li,Xiongbo Dong
The 2D/1D structure of ZnIn 2 S 4 /attapulgite was constructed by anchoring ZnIn 2 S 4 nanosheets on the surface of attapulgite nanorods for the removal of tetracycline hydrochloride (TC) and rhodamine B (RhB). The 2D ZnIn 2 S 4 was closely combined with the 1D attapulgite, and ZnIn 2 S 4 /attapulgite had a higher BET surface area (83.6 m 2 /g) than pure ZnIn 2 S 4 (13.6 m 2 /g). The combination of ZnIn 2 S 4 and attapulgite promoted pollutant adsorption by providing more exposed active sites and a larger contact area, which also contributed to enhanced photocatalytic performance. Under visible light irradiation, the as-prepared ZnIn 2 S 4 /attapulgite composites exhibited enhanced photocatalytic activity when compared with pure ZnIn 2 S 4 . After 9 min (50 min) of irradiation, the optimized ZnIn 2 S 4 /attapulgite photocatalyst removed about 99.9% RhB (82.1% TC). In addition, the ZnIn 2 S 4 /attapulgite photocatalyst demonstrated excellent photostability and availability. Compared with other photocatalysts, the samples in this work used natural minerals as the carrier, which significantly improved the dispersibility and adsorption performance of the catalyst, and was conducive to the improvement of catalytic performance. This work contributed to the development of photocatalysis for the removal of environmental liquid-phase pollutants.
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
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 43
·期 6
·2162-2171
·
IF 3.343
Wei Li,Shu-ao He,Xiao Wang,Qiong Ma,Chen-hui Zhao
Summary β-iron oxide hydroxide (β-FeOOH) had been proven to be an effective co-catalyst during H 2 evolution reaction (HER) process. In this research, a BiOCl/β-FeOOH heterojunction was successfully synthesized by a solid-state doping method. Then, the structure, composition, and photo-electrochemical properties of the prepared photocatalysts were studied. For the superior HER photocatalytic activity of ultrasmall β-FeOOH nanoparticles (NPs) and the formation of the BiOCl/β-FeOOH heterojunction, this heterojunction photocatalyst exhibited very superior photocatalytic performance in the HER process. Especially, when the amount of incorporated β-FeOOH NPs was appropriate, the BFOH-2 possessed the highest photocatalytic activity in HER process, and the HER rate was about 16.64 mmol·g −1 ·h −1 during illuminated time of 6 hours under visible light. When appropriate, ultrasmall β-FeOOH NPs were implanted into the structure of BiOCl, the BiOCl/β-FeOOH heterojunction interfaces would form for the existence of interfacial interactions. Therefore, this BiOCl/β-FeOOH heterojunction exhibited superior visible-light response, fast photo-carrier migration, and high-efficient separation of photo-carriers, so that the BFOH-2 heterojunction possessed high-efficient hydrogen evolution reaction (HER) photocatalytic activity.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 15
·20891-20902
·
IF 2.478
Peng Long-Gui,Ni Fu-Rong,Liu Jun,Sun Meng,Chang Meng-Jie,Xi Tong,Li Hui-Lu,Du Hui-Ling,Yang Jie,Li Ying
Bismuth vanadate (BiVO 4 ) is a promising photocatalyst material for photocatalytic degradation of organic pollutions. However, the fast recombination of photo-induced charge and insufficient light absorption often lead to poor photocatalytic performance. Herein, novel fibrous BiVO 4 /CdS (BVO/CdS) heterostructures are constructed by uniformly modifying caterpillar shaped electrospun BiVO 4 nanofibers with controllable quantity of CdS nanoparticles through hydrothermal reaction. The absorption of visible light and separation efficiency of photo-generated charge of BiVO 4 are significantly promoted after the decoration of CdS nanoparticles. As a result, the photocatalytic efficiency of the optimized BVO/CdS sample (BVO/CdS-2 stands for the sample synthesized with 0.05 mmol Cd(CH 3 COO) 2 and CH 4 N 2 S) is 90.43%, which is 3.3 times as high as that of pure BiVO 4 after 180 min irradiation under visible light, respectively. Moreover, the .O 2 − and .OH are the predominant active species for the degradation process indicated by scavengers added photocatalytic experiments. Due to the simple, low-cost and controllable synthetic process, the BVO/CdS heterojunctions are suitable for practical usage.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jianhua Zheng,Lei Zhang
3-D hollow sphere-like Ni 3 V 2 O 8 immobilizing V 2 O 5 nanoparticles were successfully synthesized via in situ recrystallization method without any template. The compact contact between V 2 O 5 and Ni 3 V 2 O 8 ensuring the photo-inducted carriers fast transport, which would be beneficial for inhibiting recombination rate of electron-hole ( e - /h + ) pairs. Moreover, the hollow sphere-like structure composed of the smaller nanoparticle could effectively improve of visible light capture capacity (multiple scattering for hollow architectures). Benefiting the synergistic promoting effect of the suitable heterojunction and the fascinating 3D hollow feature, the V 2 O 5 @Ni 3 V 2 O 8 indicated significantly degradation performance when evaluated as photocatalyst for degradation antibiotics and chlorophenols under visible light irradiation. Impressively, the 2-V 2 O 5 @Ni 3 V 2 O 8 heterojunction deliver the optimal degradation efficiency for TC (OTC) and 2,4-DCP (4-CP) were 90.0% (~ 91.2%) and 92.6% (~ 90.0%), respectively. The appearance mechanism for the enhancement photocatalytic performance was also elucidated in detail. The facile strategy provides a novel insight into the designing of the photocatalyst with advantages of charges separation and light-harvesting for degradation of contaminants in wastewater.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2017
·
IF 4.339
Zhixiong Luo,Somboon Chaemchuen,Kui Zhou,Andres Alvarado Gonzalez,Francis Verpoort
A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of l -lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）