JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2013
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IF 3.172
Zhe Yang,Shanshan Ji,Wei Gao,Chao Zhang,Lulu Ren,Weng Weei Tjiu,Zheng Zhang,Jisheng Pan,Tianxi Liu
Magnetic hybrid nanomaterials composed of reduced graphene oxide , zero-valent nickel, and NiAl-mixed metal oxides (rGO/Ni/MMO) have been synthesized by calcining graphene oxide (GO)/layered double hydroxide (LDH) hybrid in nitrogen atmosphere. Structural characterizations demonstrate that with the presence of GO substrate, NiAl–LDHs can be reduced into zero-valent Ni and NiAl–MMOs during calcination . Transmission electron microscopy (TEM) is used to investigate the morphology of the as-prepared hybrid nanomaterials, demonstrating that the introduction of GO substrate prevents the aggregation of LDHs. Magnetism characterization proves the ferromagnetic property of rGO/Ni/MMO hybrid. This magnetic hybrid nanomaterial exhibits excellent adsorption ability toward methyl orange (MO) in aqueous solutions. The kinetics of the adsorption process and the adsorption isotherm are investigated. The MO removal process is found to obey the Redlich–Peterson isotherm model, and its kinetics follows pseudo-second-order rate equation . In addition, the magnetic hybrid also exhibits good recycle ability for MO removal. This novel magnetic hybrid nanomaterial derived from GO/LDH hybrid demonstrates great potential in the applications of water treatment.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ping Li,Ying Lv,Xuelian Chen,Xiangjuan Li,Jianfeng Xie,Jialu Zheng
Successful techniques for the evacuation of antibiotics are of colossal importance and profoundly attractive for satisfying the squeezing need for ecological remediation. Sodium titanates (NTO) as alluring inorganic materials for different applications because of their extraordinary physicochemical properties and low-cost. In this work, we demonstrated the utilization of NTO as photocatalysts , which are acquired by means of a ball-milling assisted heat treatment approach. A regular organic dye, methylene orange (MO), was utilized to examine the photodegradation properties of NTOs. The as-orchestrated Na 4 Ti 5 O 12 /Na 2 Ti 6 O 13 displayed the greatest mineralization of MO. Particularly, the Na 4 Ti 5 O 12 /Na 2 Ti 6 O 13 photocatalyst was used to degrade three tetracyclines with the degradation efficiency of tetracycline (TC), chlortetracycline (CTC) and oxytetracycline (OTC) were 80.78 %, 90.39 % and 75.60 %, respectively. In-depth experimental and DFT investigation proved that the relatively narrow bandgap of Na 4 Ti 5 O 12 induced effective transformation of photo-excited electrons, thus reduced combination of carriers. Moreover, the heterojunction of Na 4 Ti 5 O 12 /Na 2 Ti 6 O 13 induced the generation of active radicals and transport of carriers are proposed as advantages for the mineralization of three antibiotics.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
DALTON TRANSACTIONS
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2014
·Vol. 43
·期 18
·6667-6676
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IF 4.097
Yu Xin Zhang,Xiao Dong Hao,Tian Wang,Yu Xin Meng,Xu Han
MnOx modified ZnAl layered double oxides (M-LDO) nanocomposites were prepared through an intercalation/reduction/calcination process. The morphology and crystal structure of M-LDO were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), Thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR) analysis methods. The results confirmed that the manganese oxide nanoparticles were well distributed on the LDO support. Methyl orange (MO) was chosen as a common water-soluble azo dye probe to evaluate the adsorption performance of M-LDO. The effects of MO initial concentration, agitation time, and temperature on MO adsorption were investigated. It was found that adsorption equilibrium data were best represented by the Langmuir and Redlich–Peterson isotherms and the maximum adsorption capacity was 617.28 mg g−1 obtained from the Langmuir isotherm, which was much larger than some reported adsorbents. Besides, the adsorption process was spontaneous and endothermic in nature and followed a pseudo-second-order kinetic model. The mechanism of the adsorption process was elaborated by an intraparticle diffusion model. Moreover, the regeneration test of M-LDO was carried out and it showed that the used M-LDO was feasible for at least five times. In principle, this adsorbent with a high adsorption capacity and great reutilization performance could be a very promising adsorbent for wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Shutao Li,Pengfei Wang,Haoxu Zhao,Rendong Wang,Ruisen Jing,Zilin Meng,Wenzhi Li,Zhilei Zhang,Yunyan Liu,Qian Zhang,Zhao Li
The novel photocatalyst capable of utilizing the full spectrum of solar energy has attracted the attention of researchers. Black phosphorus (BP), as a rising star in an assortment of 2D materials , possesses a broadband absorption due to its tunable direct bandgap, which makes it a candidate photocatalyst. In our work, poly dimethyldiallyl ammonium chloride (PDDA) is used to passivate BP nanosheets (BPNs) to improve its stability. Further, the functionalized BPNs and BiOBr are combined by a one-step co-precipitation method to form nanocomposites . The successful formation of nanocomposites obviously promoted the possibilities for the carrier transporting between BiOBr and BPNs, and effectively hindered the recombination of carriers, which is confirmed by all manner of characterization. Meanwhile, nanocomposites have enhanced light absorption and relatively large specific surface area , which also has a gain in its photocatalytic activity. The as-prepared nanocomposite photocatalysts significantly enhanced the photocatalytic activity with the best degradation effect of 14 and 3.4 times than pure BiOBr towards degradation of methylene orange (MO) and ciprofloxacin (CIP), respectively, under visible light . To get clear proofs of the photocatalytic mechanism, the UV–vis diffuse reflectance spectroscopy, photocurrents , electrochemical impedance spectra and Mott-Schottky measurements et al. were employed and the type-I band alignment was proposed. This finding provides an easily synthesis and effective way of BP/semiconductor photocatalysts and demonstrates a new perspective for designing novel solar light driven photocatalysts.
研究领域:
材料科学
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化学
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环境科学
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纳米技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Jinxing Hou,Guodong Dai,Jiuwu Wang,Xian Sun,Yue Situ,Hong Huang
A novel ternary polythiophene/Ag/protonated g-C 3 N 4 nanosheets (PTh/Ag/pCN) nanocomposite was constructed by electrostatic self-assembly strategy. The as-prepared 5% PTh/Ag/pCN exhibits excellent visible light photocatalytic performance toward methylene orange (MO), which is 6 and 3.7 times higher than pCN and PTh, respectively. The result was dominantly ascribed to the forming of Z-scheme heterojunction due to the synergetic effects of pCN, Ag and PTh, which is conductive to the separation of photogenerated charges. Meanwhile, the radical trapping experiments and ESR techniques proved that the photogenerated holes and superoxide radicals are vital reactive substances. This study provides a powerful approach to enhance catalytic activity of conjugated polymer photocatalyst .
研究领域:
材料科学
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环境科学
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光催化
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DOI
高影响因子
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