SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Lan Yang,Yuanzhi Hong,Enli Liu,Xue Zhang,Longyan Wang,Xue Lin,Junyou Shi
The photocatalytic H 2 production simultaneous with organic pollutant degradation has been received wide attention in resolving the problems of energy crisis and environmental pollution. In this study, for the first time, the Ni 2 P (NIP) nanoparticles are successfully loaded on the surface of In 2 O 3 (INO) nanocubes, and the physical-chemical features of as-formed NIP/INO samples are comprehensively characterized by various technologies. Moreover, the photoreactivities of as-prepared NIP/INO nanocomposites are carefully investigated through the photocatalytic H 2 evolution simultaneous with dye (Rhodamine B, RhB) degradation under simulated sunlight irradiation. It was found that the as-fabricated NIP/INO nanocomposites present the significantly enhanced H 2 production and RhB degradation rates than that of pure INO nanocubes. Consequently, the optimum photocatalytic performance of as-synthesized photocatalyst is loaded by 7 wt% NIP (7-NIP/INO), whose the H 2 evolution and RhB degradation rates are reached at 0.138 μmol h −1 and 16.12%, respectively, which are 10.6-folds and 1.6-folds higher than that of individual INO, even its photoactivity is superior than the 1 wt% Pt decorated INO. The greatly improved photocatalytic performance is due to the NIP as co-catalyst can not only promote the charge carries separation and transfer efficiency, but also provide the abundant reaction active sites. Our work highlights a simple strategy for the preparation of non-noble metal nanocomposites towards the renewable solar-driven photocatalysis applications by combining with earth-abundant Ni-based co-catalyst.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Yanping Wang,Hua Yang,Xiaofeng Sun,Haimin Zhang,Tao Xian
We reported the preparation of new ternary n-BaTiO 3 /Ag/p-AgBr heterostructured photocatalysts and their promising photocatalytic application for the dye degradation. The ternary n-BaTiO 3 /Ag/p-AgBr heterostructured photocatalysts are constructed by coupling n-type BaTiO 3 and p-type AgBr particles onto Ag nanowires. Various methods including XRD, SEM, TEM, XPS, FTIR, UV–vis diffuse reflectance spectroscopy, PL spectroscopy, photocurrent response and EIS were used to characterize the as-prepared photocatalysts. The photodegradation performances of the photocatalysts were assessed by using RhB as the model pollutant and simulated sunlight as the light source. It is demonstrated that the n-BaTiO 3 /Ag/p-AgBr ternary composite photocatalysts exhibit excellent photodegradation performances superior to bare BaTiO 3 and AgBr particles. Particularly, the 20 %BTO/1.2 %Ag/AgBr composite can photocatalyze 99.3 % removal of RhB after 12 min photoreaction, and has a photodegradation activity which is about 3.1 times larger than that of bare AgBr particles. The underlying photodegradation mechanism of the ternary composite photocatalysts was investigated and discussed.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2019
·Vol. 54
·期 11
·8236-8246
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IF 3.442
Wen Yun,Zhao Yue,Guo Mingzhen,Xu Yan
Photo-Fenton reactions and the related functional nanomaterials have been widely studied for applications in wastewater treatment industry. Herein, visible-light-responsive Fe 2 O 3 nanoparticle-decorated BiVO 4 nanoplates were designed and successfully prepared through a one-pot hydrothermal route. The as-prepared Fe 2 O 3 /BiVO 4 nanocomposites exhibit excellent photo-Fenton catalytic activity toward the discoloration of methylene blue (MB) and Rhodamine B (RhB) dye molecules in the presence of H 2 O 2 . The experimental results indicate that nearly 100% of MB (100 mL, 10 mg L −1 ) and RhB (100 mL, 5 mg L −1 ) dye molecules are degraded in the presence of 1 g L −1 Fe 2 O 3 /BiVO 4 -1 (FB-1) photo-Fenton catalyst and 0.5 mL of H 2 O 2 within 20 min. The Fe 2 O 3 /BiVO 4 Fenton photocatalyst also demonstrates high reusability under visible light irradiation with λ ≥ 420 nm. The photoinduced electrons on the conduction band of BiVO 4 nanoplates can move toward the surface of Fe 2 O 3 /BiVO 4 to accelerate the reduction of Fe 3+ ; then, the as-formed Fe 2+ ions on the surface of the catalyst greatly enhance the decomposition of H 2 O 2 to form reactive · OH species for the use in photodegradation of MB and RhB dye molecules. The synergetic effect of Fe 2 O 3 and BiVO 4 reported in this work might provide more opportunity to fabricate other novel semiconductor-based Fenton nanocomposites for contamination treatments in wastewater.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Xiaojing Yu,Haoran Qiu,Bin Wang,Qingnan Meng,Shaodong Sun,Yufei Tang,Kang Zhao
To construct Z-scheme not only can effectively separate the excited electron-hole pairs, but also utilize the ample redox capability of each semiconductor component in this system for the surface photocatalytic reaction. In this work, a TiO 2 –Au–BiOBr ternary Z-scheme photocatalyst was constructed, in which Au NPs were used as the electron mediator to join BiOBr nanosheets and TiO 2 nanofibers . The results showed that, under full spectrum irradiation, TiO 2 –Au–BiOBr nanofibers exhibited outstanding photocatalytic performance toward the degradation of Rhodamine B (RhB) with an excellent photodegradation efficiency of 99.91% within 30 min as well as good stability. The reaction mechanism of the TiO 2 –Au–BiOBr Z-scheme system was systemically studied by XPS , photoelectrochemical tests and free radical trapping experiments, etc. Moreover, the photocatalyst also exhibited excellent photocatalytic activity for degrading methyl orange and methylene blue.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
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2019
·
IF 5.77
Peng Xu,Jin Yang,Yu Chen,Yong Li,Xiaohua Jia,Haojie Song
The removal of emulsified oil and organic dyes from wastewater is of extreme challenge owing to their difference of physical and chemical properties. Here we choose cellulose fibers derived from wood as supporting materials and the irregular flake-like BiOBr and sphere-like AgBr are in situ grown on the fibers via freeze-drying, which successfully create wood-derived fiber/BiOBr/AgBr (WFBA) sponge for wastewater treatment. The obtained WFBA sponge reveals favorable mechanical strength at a strain of 60% and 50 cycles of compression tests. In view of the superhydrophilicity and underwater superoleophobicity of WFBA sponge, it can be used for separating surfactant-stabilized kerosene-in-water emulsions with oil rejection ration higher than 99.91%, and simultaneously adsorbing organic dyes with removal efficiency >99.99%. Furthermore, the polluted WFBA sponge is capable of realizing dye degradation under Xe lamp, solar light and fluorescent lamp due to its enhanced photocatalytic activity. Thus, the regenerated sponge can take full advantage of functionalities of emulsion separation and dye adsorption, as presented by that the oil rejection ration still keeps as high as 98.23% and removal dye efficiency remained over 99.90% after five cycles of filtration. This study provides a feasible and scalable approach to engineer versatile materials for wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2020
·Vol. 10
·期 2
·1181-1190
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IF 3.119
Weidong Peng,Chun Yang,Jiang Yu
A facile and feasible method was successfully utilized to incorporate Bi2O3 and g-C3N4 quantum dots on TiO2 surface to synthesize a novel composite g-C3N4/TiO2/Bi2O3. The photocatalytic activity of the composite g-C3N4/TiO2/Bi2O3 for degradation of dyes under sunlight and UV light irradiation was evaluated. It possessed the higher photocatalytic performance than that of pristine TiO2 or g-C3N4 under the same conditions. Under sunlight irradiation, the reaction rate constants of the g-C3N4/TiO2/Bi2O3 was about 4.2 times and 3.3 times higher than that of TiO2 and g-C3N4, respectively. The promising photocatalytic performance was attributed to the broader light absorption range and efficient separation of photoinduced carriers. Moreover, based on the TEM, XPS, XRD, UV-vis spectrum, radicals scavenging test and Mott–Schottky analysis systematic mechanism for photodegradation process was proposed. This work provides a promising strategy for the modification of TiO2-based semiconductors by incorporating different quantum dots and promoting the efficiency of the photocatalysts in practical application.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
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2016
·Vol. 6
·期 10
·8061-8069
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IF 3.289
Jingwen Qian,Zengying Zhao,Zhenguang Shen,Guoliang Zhang,Zhijian Peng,Xiuli Fu
W19O55 nano-/micron-rods (NMRs) were synthesized through calcining WO3 powders under a reducing atmosphere with S vapor in a vacuum furnace. For comparison, the as-prepared W19O55 NMRs were then annealed at 500 °C for 2 h to obtain WO3 NMRs. The decolourization of organic dyes methylene blue and rhodamine B under visible light by the two kinds of NMRs reveals that the oxygen-deficient W19O55 sample will present better comprehensive performance due to its stronger surface adsorption to the dye molecules, which could be attributed to the oxygen vacancies.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 2
·332
·
IF 3.057
Xiaonan Li,Jinghua Li,Weilu Shi,Jianfeng Bao,Xianyuan Yang
In this study, uniform Fe3O4magnetic nanorings (Fe3O4-MNRs) were prepared through a simple hydrothermal method. The morphology, magnetic properties, and structure of the product were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), vibrating sample magnetometer (VSM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. The Fe3O4-MNRs were used as Fenton-like catalysts in the presence of hydrogen peroxide (H2O2) and showed excellent Fenton-catalytic activity for degradation of organic dyes such as Methylene blue (MB), Rhodamine B (RhB), and Bromophenol blue (BPB). Furthermore, the obtained Fe3O4-MNRs could be recycled after used for several times and still remained in a relative high activity and could rapidly be separated from the reaction medium using a magnet without considerable loss. All results reveal that Fe3O4-MNRs have potential for the treatment of dyes pollutants.Keywords:magnetic;Fenton;crystal structure;dyes degradation;recycling
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2021
·
IF 5.706
Shuzhen Zhou,Jingyi Hao,Mengjie Zhou,Xiaoguang Qiao,Xinchang Pang
The combination of piezoelectric material and ball milling leads to new frontiers in catalysis research. Here we used piezoelectric BaTiO 3 nanoparticles as the additive for the degradation of dye pollutant in solid state in ball milling process. With the assistant of ppm level CuBr 2 and H 2 O 2 , high degradation conversion (> 99%) of dyes can be achieved in short time (10 min). BaTiO 3 nanoparticles became temporarily highly polarized particles during BM process and generated electron-hole. These particles exhibited strong reducing properties and reduced Cu(II) into the active Cu(I) species which can catalyze H 2 O 2 to generate highly active ·O 2– to enhance the dye degradation. In addition to the general applicability for different dyes and larger scales, this BaTiO 3 assist BM process was deduced to be a promising powerful platform for organic pollutant treatment in solid states.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Kang Jing,Sen Chen,Qianru Shi,Luping Lu,Hui Liu
Ag@Ti 3 C 2 -TA nanocomposite catalyst was elaborately constructed by a simple and green method with Ti 3 C 2 as the carrier, tannic acid (TA) as the modifier, and silver nitrate as the precious metal precursor. A series of characterizations were used to analyze morphology and microstructure of the resulting catalyst. The degradation behaviors of the catalyst were studied with rhodamine B (RB) and methyl orange (MO) as the model dyes. The result demonstrated that Ag@Ti 3 C 2 -TA exhibited efficient catalytic degradation performance toward both RB and MO, and the degradation percentage increased with the growth of TA content in the catalyst. The catalytic degradation process conformed to the quasi-level kinetic model, and catalytic reaction rate constants of Ag@Ti 3 C 2 -TA for RB and MO were 0.972 and 1.478 min −1 , respectively. The catalytic degradation percentage of Ag@Ti 3 C 2 -TA toward RB and MO still remained above 80% even after 10 catalytic cycles, indicating high degradation percentage and considerable catalytic stability.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2019
·Vol. 91
·期 1
·54-62
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IF 1.986
Deng Senlin,Zhang Xubin,Lv Guojun,Zhai Yi,Yang Zebin,Zhu Yongqiang,Li Haichao,Wang Fumin
Fe-doped zeolites with Mobil Five (MFI) structure have been widely used as heterogeneous Fenton catalysts to eliminate dyes from wastewater. However, the influence of carriers on degradation efficiency has not been reported yet. In this work, we have prepared three Fe-doped zeolite catalysts, FeS-1, FeZSM-5, and FeTS-1, with silicalite-1 (S-1), zeolite socony mobil-5 (ZSM-5), and titanium silicalite-1 (TS-1) as carriers, respectively. Characterizations, such as X-ray diffraction (XRD), scanning electron microscopy, energy-disperse X-ray spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflection spectroscopy (UV–Vis DRS), X-ray fluorescence spectrometer, zeta potential, and N 2 adsorption/desorption isotherms, were used to investigate the morphologies and physicochemical properties of the synthesized materials. The catalytic performances of all zeolite catalysts were evaluated in the degradation experiments. The results depicted that the degradation efficiency of FeZSM-5 was higher than that of FeS-1 and FeTS-1 owing to its higher hydrophilic property, larger external specific surface area, and more negative zeta potential value. Therefore, the ZSM-5 could be a more suitable solid matrix for heterogeneous Fenton reactions than S-1 and TS-1.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Yaya Wang,Yongqiang Cao,Yingjie Liu,Ping Yang
Increased charge transfer and light absorption as well as large specific surface area are effective ways to improve the catalytic efficiency of photocatalysts . In this paper, barbituric acid , urea and thiourea were separately freeze-dried to form a homogeneous precursor with melamine , followed by thermal polymerization at 750 °C, g-C 3 N 4 was doped successfully with C, N and S. Among them, C-doped g-C 3 N 4 revealed well photocatalytic hydrogen production which reached to 2.45 mmol g −1 h −1 . N-doped g-C 3 N 4 exhibited enhanced photocatalytic degradation properties for organic dye (RhB) which is completely degraded within 8 min while the performance S-doped sample is not satisfied. The introduction of C resulted in planarized sample which has a larger specific surface area and provides more active sites. N doping makes the valence band position moving in the direction of high energy. Thus, holes have stronger oxidizing ability. Accordingly, the effect of C and N ratios in g-C 3 N 4 photocatalysis was fully discussed for more comprehensive understanding of g-C 3 N 4 .
研究领域:
材料科学
·
光化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）