FERROELECTRICS
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2023
·
IF 0.8
Peisong Tang,Xiaoqian Lu,Xuezhi Wei,Jing Zhang,Shiyu Wen,Huize Xu,Wei Yong,Ruipeng Hou,Haifeng Chen
Using praseodymium nitrate, cobalt acetate and citric acid as main raw materials, the PrCoO3 photocatalyst was prepared by sol-gel method. The PrCoO3 samples were characterized by thermogravimetry and differential scanning calorimetry (TG-DSC), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR). The photocatalytic activity of PrCoO3 was tested by simulating polluted water with 10 mg/L methyl orange solution under ultraviolet light irradiation. The results show that pure PrCoO3 can be prepared by calcination in the range of 600 to 900 °C. The average particle size of PrCoO3 is about 30 μm. The photocatalytic performance of PrCoO3 is the best under the conditions of 700 °C calcination and ultraviolet light irradiation for 120 min, and the degradation rate of methyl orange (10 mg/L) can reach 98%. The PrCoO3 samples are consistent with first-order kinetics for the degradation of methyl orange. And the apparent rate constants is k = 0.0346 min−1. PrCoO3 sample shows good ultraviolet light photocatalytic activity and has a broad application prospect in the field of photocatalysis.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 22
·16696-16703
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IF 2.019
Yan Qishe,Xie Xin,Lin Cuiping,Zhao Yalei,Wang Shenbo,Liu Yonggang
The nano-scale Ag 3 PO 4 was successfully synthesized by the silver ammonia complexing precipitation method at room temperature. And the Graphene oxide (GO)/Ag 3 PO 4 nanocomposites with different contents of GO were successfully synthesized using the electrostatic driving method. The as-prepared GO/Ag 3 PO 4 nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV–visible diffuse reflectance spectroscopy (UV–Vis DRS), confirming that Ag 3 PO 4 were highly dispersed to GO sheet. The photocatalytic properties of GO/Ag 3 PO 4 were evaluated by the degradation of Methyl Orange (MO) under visible light irradiation and solar irradiation respectively. The results showed that the photocatalytic efficiencies of GO/Ag 3 PO 4 nanocomposites had enhanced largely and the kinetics reaction models were followed first-order. Furthermore, 5% GO/Ag 3 PO 4 exhibited the highest photocatalytic activity on degradation of MO under visible-light irradiation. The improved photocatalytic performances of the GO/Ag 3 PO 4 nanocomposites mainly attributed to the introducing of GO, which benefit for electron transfer and inhibit the recombination of electron–hole pairs, promoting the practical application of Ag 3 PO 4 in water purification.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 12
·11619-11626
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IF 2.195
Zeng Bin,Xia Qiuying,Zeng Wujun
A photocatalyst consisting of graphene/iodine doped CdS nanoplates (G/I-CdS NP) was fabricated using a microwave method. The phase structure, surface morphology, and optical bandgap were analyzed using X-ray diffractometry, photoluminescence spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, emission scanning electron microscopy, and transmission electron microscopy. Excellent photocatalytic performance was demonstrated based on the degradation of methylene orange (MO) under visible light irradiation. Therefore, doping of iodine in CdS nanoplates resulted in a bandgap reduction. The coupling of CdS with graphene could effectively suppress the recombination of light-induced electron–hole pairs. As a result, an excellent synergetic effect could be achieved for improved photocatalytic performance. These findings will have a positive impact on the use of metal sulfides for future environment-related applications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2019
·Vol. 125
·期 2
·1-8
·
IF 1.784
Bi Yong-guang,Liu Di
The effect of calcination temperature and catalyst dosage on degradation rate of methyl orange has been investigated and 0.04 g TiO 2 with 700 °C calcination temperature was selected as the object of doping due to its higher degradation efficiency (99% in less than 1 h), Fe 3 O 4 modified with citric acid was used to improve the recovery and reuse of catalyst, the effect of doping amount of Fe 3 O 4 on the photo-catalytic efficiency of methyl orange has been discussed, and the results showed that the methyl orange degraded above 97% with 20 mg Fe 3 O 4 doped into TiO 2 when the TiO 2 @Fe 3 O 4 was used three times. The particles were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photo-electron spectroscopy; the magnetic properties were measured by PPMS-DynaCool type vibrating magnetometer; the composite showed excellent magnetic response with saturation magnetization of 9.5 emu g −1 . Zeta-potential analysis indicated that TiO 2 (3.6 mV) and Fe 3 O 4 (− 16.8 mV) are linked by electrical attraction, demonstrating that doping of Fe 3 O 4 is beneficial to the recycle and reuse of catalyst and improves the photo-catalytic efficiency, and TiO 2 @Fe 3 O 4 is suitable for industrial production.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 8
·085005
·
IF 1.929
Jun Li,Xuemei Diao,Yumin Xiao,Lizhao Qin,Hua Lin,Qing Li,Bin Liao
The continuous discharge of organic dye effluents from textile industries causes severe global water pollution. A sustainable and effective route needs to be developed for the treatment of textile effluent in order to enable environmental protection and water recycling. In particular, the nanomaterials-based photocatalytic degradation of organic compounds is a promising approach to minimize water pollution. Herein, a facile hydrothermal method was reported for the preparation of Zn2GeO4 nanorods (NDs) with unique size, shape, and surface chemistry using sodium lauryl sulfate (SDS) as the surfactant. The crystal structure, size, and shape of the synthesized NDs were characterized by x-ray diffraction pattern (XRD) and field-emission scanning electron microscopy (FESEM). Initially, the XRD pattern revealed that SDS plays a crucial role in the formation of highly pure Zn2GeO4 NDs with rhombohedral crystalline nature. It was clearly noticed that increasing SDS concentration results in the formation of Zn2GeO4 NDs with decreased size ranges (100 nm). Conversely, the size of Zn2GeO4 NDs increased at higher SDS concentrations. The photocatalytic activity of Zn2GeO4 NDs was evaluated by the degradation of methyl orange (MO) in aqueous solution. Under light irradiation, the Zn2GeO4 NDs prepared by using different concentrations of SDS exhibited varied photocatalytic performance. Among the tested samples, Zn2GeO4 NDs prepared with 0.1 g of SDS showed the best photocatalytic activity with a MO decomposition rate of 94.6% within 60 min. This study suggests that SDS can be used to modulate the morphology and photocatalytic performance of Zn2GeO4 NDs, and the resultant Zn2GeO4 NDs can serve as a photocatalyst in wastewater treatment.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2019
·
IF 0
Fu Chang Peng,Qi Lai,Can Yu Zhong,Yan Cui,Xian Jie Liao,Qiao Chu Liu,Chuan Hai Xiao
The TiO2 nanoparticles with different Yb doping amount were prepared by a facile sol-gel method. The samples were characterized by XRD, TEM, XPS, UV-Vis, and PL, etc. The influence of Yb-doping on structure and visible light photocatalytic activity of mixed phase TiO2 was evaluated by photocatalytic degradation of methylene blue (MB) under the irradiation of fluorescent lamp. The results show that ytterbium appeared two kinds of Yb3+ and Yb2+ valence state on the surface of TiO2. Ytterbium doping can restrain the phase transfer from anatase to rutile, prevent the grain growth, and increase the surface hydroxyl content. Appropriate amount of Yb doping and the proportions of rutile and anatase mixed phase can effectively inhibit the recombination of photogenerated electron and hole, expand the wavelength range of absorption spectrum, and improve the photocatalytic performance of TiO2. Meanwhile, the photocatalytic activity of the Yb-TiO2 samples was the best under the irradiation of fluorescent light when the sintered temperature T=500°C and n(Yb):n(Ti)=0.009, it was 95.2% within 6 h and significantly higher than 56.4% of pure TiO2 under the same experimental conditions.
研究领域:
材料科学
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环境科学
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DOI
CHEMICAL ENGINEERING JOURNAL
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2012
·
IF 3.461
C. Shen,Y.J. Wang,J.H. Xu,G.S. Luo
This paper presents a novel immobilization method for the preparation of highly dispersed TiO 2 nanoparticles supported on porous glass beads. The method involves an in situ ion exchange process and a calcination process. Mono-dispersed TiO 2 nanoparticles exhibiting the anatase phase with different mean diameter and different loading amount have been successfully prepared through the controllable and green way. With the increase of loading amount of Ti from 0.08 wt.% to 4.55 wt.%, the mean diameter of the TiO 2 nanoparticles varied from 3.8 to 5.3 nm. And the band gaps of the TiO 2 nanoparticles with the highest and lowest loading amount are 3.25 and 3.00 eV, respectively. The prepared TiO 2 nanoparticles supported on porous glass beads showed excellent photocatalytic performance for the degradation of methyl orange (MO). For the catalyst with a Ti content of 0.08 wt.%, when the dosage was 1.93e−5 g/mL, 65% of the total MO decomposed after 30 min; for the catalyst with a Ti content of 2.56 wt.%, when the dosage reached 0.81e−3 g/mL, complete degradation was observed.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2017
·
IF 0.457
Peisong Tang,Haifeng Chen,Chunyan Lv,Kunyan Wang,Yongya Wang
Using Eu(NO3)3·6H2O and Fe(NO3)3·9H2O as raw material, the nanoparticulate EuFeO3 was directly synthesized by a one-step microwave route without additional high temperature calcination process. The prepared sample was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry and differential thermal analysis (TG-DTA), Fourier transform infrared spectroscopy (FT-IR) and UV-visible diffuse reflectance spectroscopy (DRS). The results show that the EuFeO3 is single phase perovskite, and its morphology is nanoparticle with an average diameter of about 60–80 nm. The prepared nanoparticle has an optical band gap of 2.3 eV, and exhibits strong visible-light absorption. The photocatalytic activity of nanoparticulate EuFeO3 was investigated in experimental simulation wastewater containing 10 mg/L methyl orange (MO). The photocatalytic experiment indicates that the prepared nanoparticulate EuFeO3 was highly visible-light activities for the degradation of MO. It is suggested that the narrow band gap and the strong visible-light absorption are responsible for the high visible-light photocatalytic activity of the prepared EuFeO3.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2017
·Vol. 19
·期 5
·1-15
·
IF 2.02
Cheng Yang,Niu Helin,Chen Jingshuai,Song Jiming,Mao Changjie,Zhang Shengyi,Chen Changle,Gao Yuanhao
The hierarchical flower-like β-In 2 S 3 catalyst assembled from 2D nanosheets was prepared using an organic-component depletion method utilizing inorganic-organic hybrids indium diethyldithiocarbamate (In-DDTC) as a single-source precursor. The crystallization, morphology and composition of the as-synthesized β-In 2 S 3 were characterized by XRD, SEM, TEM, EDS and XPS, respectively. The β-In 2 S 3 possessed high specific surface area of 134.1 m 2 g -1 , adsorption capacity of 195.5 mg g -1 for methylene blue, and extreme photodecolorization speed under visible light irradiation for the complete removal of methyl orange (MO) dye within 15 min and tetracycline within 60 min. Although methyl orange concentration decreased quickly, the total organic carbon (TOC) decreased slowly. UV-vis and mass spectrometry (MS) were applied to analyze the intermediates coming from the photodecolorization of MO. In order to estimate the roles of active species during the decolorization of MO, trapping experiments were conducted to determine the main active species during the decolorization process. The results indicated that . O 2
− radicals and e -1 were the key intermediates. This enhanced activity was attributed to its unique structures assembled from 2D nanosheets with thickness of ca. 5-7 nm, leading to high specific surface area, wide range of pore size distribution and great efficiency in absorbing light and electron/hole separation. The hierarchical flower-like β-In 2 S 3 demonstrated great advantages in the treatment of various wastewater pollutants including textile dyes and antibiotics.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2016
·
IF 0.375
Chunyan Tu,Jiqi Jiang,Shuyu Zhong,Peisong Tang
Using Nb2O5, HF and polyvinyl alcohol as major materials, the nanoparticulate NbO2F was successfully prepared by hydrothermal method. The prepared samples were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared spectrometer (FT-IR), and UV-visible diffuse reflectance spectroscopy (DRS). The photocatalytic activity of nanoparticulate NbO2F was investigated in experimental simulation wastewater containing 20 mg/L methyl orange. The results show that nanoparticulate NbO2F sample is cubic structure with about 50–80 nm average crystal grain. The optical absorption edge of NbO2F is 370 nm which corresponds to the band gap of 3.35eV. The photocatalytic experiment demonstrated that nanoparticulate NbO2F show highly photocatalytic activity for the degradation of methyl orange.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Chen Li,Li Sun,Jinan Niu,Arianit A. Reka,Peizhong Feng,Hermenegildo Garcia
Improving the efficiency/cost ratio is the key to the practical application of photocatalysts. Using cheap minerals as carriers is an effective means to improve the efficiency/cost ratio of photocatalysts. Here, kaolinite was used to co-load TiO 2 nanoparticles and Bi containing core-shell spheres forming the composites with excellent photocatalytic performance. The rate constant per unit mass of TiO 2 in the optimal sample reached 18 times that of TiO 2 . Kaolinite plays important roles in promoting photocatalytic activity by improving the dispersion of TiO 2 and the adsorption of O 2 molecules and MO anions, besides the type-II energy band alignment of TiO 2 and Bi x O y .
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Mingxia Tian,Guyu Zhang,Xinlei Zhao,Yumin Yan,Jianbo Zhao,Hui Bai,Jianhui Jiang
Herein, Nd-ZnO/g-C 3 N 4 (NZCN) composites were obtained by doping rare-earth element Nd with ZnO using a hydrothermal method , coupled with g-C 3 N 4 (CN) electrostatic ultrasonic self-assembly. The NZCN composite exhibited an impressive methylene blue (MB) removal rate of 94.88 %, with a degradation rate of 0.02637 min −1 after 105 min exposure to 500 W xenon lamp irradiations. Comparatively, the degradation rate of MB by the NZCN composite was five and twice times higher than ZnO and CN samples, respectively. This significant improvement can be attributed to the synergistic effect of Nd, ZnO, and CN, which not only widened the light absorption range but also enhanced the density, separation, and transport of photogenerated electrons (e − ) and holes (h + ), thus improving the photocatalytic performance of the NZCN composites. An in-depth investigation into the photocatalytic reaction process was carried out using free-radical active-species capture experiments, confirming the critical role of h + . Furthermore, the reproducibility and stability of the NZCN composites were assessed over five experimental cycles, demonstrating consistent and stable MB degradation rates of 90.1 % while retaining the crystal structure unchanged. Overall, the construction of rare-earth-metal-doped ZnO and Z-type heterojunctions synergistically improves photocatalytic activity and provides a green and environmentally friendly approach for the removal of organics from wastewater.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）