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Synthesis of magnetic Pb/Fe

Hualiang AN, Xinqiang ZHAO, Zhiguang JIA, Changcheng WU, Yanji WANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2, Pages 215-218 doi: 10.1007/s11705-009-0055-2

Abstract: To facilitate the recovery of Pb/SiO catalyst, magnetic Pb/Fe O /SiO samples were prepared separatelyWhen the gelatin was applied in the preparation of Fe O at 60°C and the pH value was controlled at 4in the preparation of Fe O /SiO , the Pb/Fe O /SiO sample shows good catalytic activity and magnetismUnder the reaction conditions of a reaction temperature of 180°C, reaction time of 2 h, catalyst percentageof 1.7 wt-% and a molar ratio of urea to PG of 1∶4, the yield of propylene carbonate attained was 87.7%

Keywords： Pb/Fe3sub>O4sub>/SiO2sub> magnetic particle urea 1 2-propylene glycol propylene

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The stabilization effect of Al2sub>O3sub> on unconventional Pb/SiO2sub> catalyst

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10, Pages 1423-1429 doi: 10.1007/s11705-023-2315-y

Abstract: To enhance the stability, the traditional carrier Al2sub>O3sub> with a small amount, wasintroduced into Pb/SiO2sub> catalyst in this study.It has been proved that Al2sub>O3sub> can inhibit the reduction of PbO, and weaken theAs a result, 3Al15Pb/SiO2sub> catalyst exhibits a much higher stability up to more than 150 h.>2sub>O3sub> addition was also proposed.

Keywords： Pb/SiO2sub> Al2sub>O3sub> propane dehydrogenation propene stability

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Rh2sub>O3sub>/hexagonal CePO4sub> nanocatalysts for N2sub>O decomposition

Huan Liu, Zhen Ma

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 4, Pages 586-593 doi: 10.1007/s11705-017-1659-6

Abstract: Hexagonal CePO nanorods were prepared by a precipitation method and hexagonal CePO nanowires were prepared by hydrothermal synthesis at 150 °C. Rh(NO ) was then used as a precursor for the impregnation of Rh O onto these CePO materials. The Rh O supported on the CePO nanowires was much more active for the catalytic decomposition of N O than the Rh O supported on CePO nanorods. The stability of both catalysts as a function of time on stream was studied and the influence of the co-feed (CO , O , H O or O /H O) on the N O decomposition was also investigated. The samples were characterized by N adsorption-desorption, inductively coupled plasma optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron microscopy, hydrogen temperature-programmed reduction, oxygen temperature-programmed desorption, and CO temperature-programmed desorption in order to correlate the physicochemical and catalytic properties.

Keywords： Rh2sub>O3sub> CePO4sub> N2sub>O decomposition

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A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2, Pages 450-459 doi: 10.1007/s11705-020-1930-0

Abstract: In this research, an eco-friendly magnetic adsorbent based on Fe O /salicylic acid nanocomposite wasThe nanocomposite was employed as a magnetic solid-phase extraction agent for separation of Cd(II) ions

Keywords： cadmium magnetic solid-phase extraction Fe3sub>O4sub> nanoparticles Fe3sub>O4sub>/salicylic acid nanocomposite flame atomic absorption spectrometry

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acid anions on highly efficient Ce-based catalysts for selective catalytic reduction of NO with NH3sub>

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10, Pages 1399-1411 doi: 10.1007/s11705-023-2345-5

Abstract: Three kinds of Ce-based catalysts (CePO4sub>, CeVO4sub>, Ce2sub>(SO4sub>)> Ce2sub>(SO4sub>)3sub>, which is in agreement with their abilities of NH3sub>4sub>^3–, VO4sub>^3– and SO4sub>^{2–sub>3sub> temperature programmed desorption, H2sub>>2sub> for Ce2sub>(SO4sub>)3sub>.}

Keywords： CePO4sub> CeVO4sub> Ce2sub>(SO4sub>)3sub> selective catalytic reduction

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Inexpensive synthesis of a high-performance Fe

Nadir Abbas, Godlisten N. Shao, Syed M. Imran, Muhammad S. Haider, Hee Taik Kim

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 3, Pages 405-416 doi: 10.1007/s11705-016-1579-x

Abstract: A sol-gel technique has been developed for the synthesis of a magnetite-silica-titania (Fe O -SiO -TiO ) tertiary nanocomposite with improved photocatalytic properties based on the use of inexpensive titania and silica precursors. The exceptional photocatalytic activity of the resulting materials was demonstrated by using them to photocatalyze the degradation of methylene blue solution. The best formulation achieved 98% methylene blue degradation. An interesting feature of the present work was the ability to magnetically separate and reuse the catalyst. The efficiency of the catalyst remained high during two reuses. The synthesized nanomaterials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, ultra-violet-visible spectroscopy, diffuse reflectance spectroscopy, and thermogravimetric analysis. XRD analysis revealed the formation of multicrystalline systems of cubic magnetite and anatase titania crystals. SEM and TEM characterization revealed well-developed and homogeneously dispersed particles of size less than 15 nm. FTIR spectra confirmed the chemical interaction of titania and silica. It was further noticed that the optical properties of the prepared materials were dependent on the relative contents of their constituent metal oxides.

Keywords： sol-gel photocatalysis magnetic recovery TiO2sub> Fe3sub>O4sub> SiO2sub>

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Removal of P4sub>, PH3sub> and H2sub>S from Yellow Phosphoric Tail Gas by a Catalytic

Ning Ping,Hans-Jörg Bart,Wang Xueqian,Ma Liping,Chen Liang

Strategic Study of CAE 2005, Volume 7, Issue 6, Pages 27-35

Abstract: sulfide in yellow phosphorus tail gas was investigated with activated carbon and a home-made catalyst KU2.Both KU2 and activated carbon proved to be effective catalysts in the catalytic oxidation process (COP) for H2sub>S and PH3sub> removal.Under optimized operation conditions the product gas with a content of hydrogen sulfide ＜5 mg/m³, total phosphorus＜ 5 mg/m³ was obtained by using the COP process.

Keywords： catalyst catalytic oxidation H2sub>S P4sub> PH3sub> fixed bed

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Fe3sub>O4sub> encapsulated mesoporous silica nanospheres with tunable size and large void

Tingting LIU, Lihong LIU, Jian LIU, Shaomin LIU, Shi Zhang QIAO

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 1, Pages 114-122 doi: 10.1007/s11705-014-1413-2

Abstract: Magnetic Fe O and mesoporous silica core-shell nanospheres with tunable size from 110–800 nm were synthesizedThe morphological, structural, textural, and magnetic properties were well-characterized by scanningInterestingly, magnetic core and mesoporous silica shell nanocomposites with large void pore (20 nm)

Keywords： mesoporous silicas magnetic nanoparticles core-shell nanoparticles cell uptake

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On the monolayer dispersion behavior of Co3sub>O4sub> on HZSM-5 support: designing applicable

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11, Pages 1741-1754 doi: 10.1007/s11705-023-2332-x

Abstract: Based on monolayer dispersion theory, Co3sub>O4sub>/ZSM-5 catalysts with different loadingsCo3sub>O4sub> can spontaneously disperse on HZSM-5 support with a monolayer dispersionBelow the monolayer dispersion threshold, Co3sub>O4sub> is finely dispersed as sub-monolayersreaction performance. 4% Co3sub>O4sub>/ZSM-5, the catalyst close to the monolayer dispersioncapacity amount of Co3sub>O4sub> onto HZSM-5 support.

Keywords： Co3sub>O4sub>/ZSM-5 NOxsub>-SCR by NH3sub> monolayer dispersionthreshold effect surface acid sites surface active O2sub>^– anions

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Synthesis of MnFe

Jian LI,Yue JIAO,Caichao WAN

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 1, Pages 116-120 doi: 10.15302/J-FASE-2017141

Abstract: In addition, the nanocomposite was easily actuated under the effect of an external magnetic field, revealingits strong magnetic responsiveness.Combined with the advantages of environmental benefits, facile synthesis method, strong magnetic responsiveness

Keywords： cellulose aerogel MnFe2sub>O4sub> magnetic responsiveness nanocomposite

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Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8, Pages 1211-1223 doi: 10.1007/s11705-022-2145-3

Abstract: In this study, a Co3sub>O4sub>–CeO2sub> composite oxide catalyst was successfullyexhibited a higher selectivity to KA-oil, which was benefited from the synergistic effects between Co³⁺/Co²⁺ and Ce⁴⁺/Ce³⁺ redox pairs, than bulk CeO2sub> and/or Co3sub>O4sub>.>3sub>O4sub>–CeO2sub>.

Keywords： Co3sub>O4sub>–CeO2sub> composite oxides cyclohexanone cyclohexanol ultrasonic-assisted

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Complete oxidation of methane on CoO-SnO catalysts

Xingfu TANG , Jiming HAO , Junhua LI ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3, Pages 265-270 doi: 10.1007/s11783-009-0019-2

Abstract: CoO-SnO hybrid oxides were prepared by the coprecipitation method and were used to oxidate methane (CH) in presence of oxygen. The CoO-SnO with a molar ratio of Co/(Co+Sn) at 0.75 exhibited the highest catalytic activity among all the CoO-SnO hybrid oxides. Experimental results showed that the catalysts were considerably stable in the CH combustion reaction, and were verified by X-ray photoelectron spectra (XPS). It was found that CoO was the active species, and SnO acted as a support or a promoting component in the CoO-SnO hybrid oxides. The surface area was not a major factor that affected catalytic activity. The hydrogen temperature-programmed reduction (H-TPR) results demonstrated that the interaction between cobalt and tin oxides accelerated the mobility of oxygen species of CoO-SnO, leading to higher catalytic activity.

Keywords： Co3sub>O4sub>-SnO2sub> complete oxidation methane (CH4sub>)

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Effective regeneration of thermally deactivated commercial V-W-Ti catalysts

Xuesong SHANG, Jianrong LI, Xiaowei YU, Jinsheng CHEN, Chi HE

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1, Pages 38-46 doi: 10.1007/s11705-011-1167-z

Abstract: An effective method for the regeneration of thermally deactivated commercial monolith SCR catalysts was investigated. Two types of regenerated solutions, namely NH Cl (1 mol/L) and dilute H SO (0.5 mol/L), were employed to treat the used catalyst. The effects of temperature and the regeneration process on the structural and textural properties of the catalysts were determined by X-ray diffraction, scanning electron microscopy, N adsorption/desorption, elemental analysis and Fourier transform infrared spectroscopy. The results suggest that the anatase phase of the used catalyst is maintained after exposure to high temperatures. Some of the catalytic activity was restored after regeneration. The catalyst regenerated by aqueous NH Cl had a higher activity than that of the catalyst treated by dilute H SO . The main reason is that the NH generated from the decomposition of NH Cl at high temperatures can be adsorbed onto the catalyst which promotes the reaction. The aggregated V O were partially re-dispersed during the regeneration process, and the intrinsic oxidation of ammonia with high concentrations of O is a factor that suppresses the catalytic activity.

Keywords： V2sub>O5sub>-WO3sub>/TiO2sub> catalysts thermal deactivation regeneration NH4sub>Cl dilute H2sub>SO4sub> solution

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ZnFe2sub>O4sub>/BiVO4sub> Z-scheme heterojunction for efficient visible-light photocatalytic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11, Pages 1728-1740 doi: 10.1007/s11705-023-2322-z

Abstract: A novel Z-scheme ZnFe2sub>O4sub>/BiVO4sub> heterojunction photocatalyst was successfullyCompared with the single-phase counterparts, ZnFe2sub>O4sub>/BiVO4sub> demonstratedConsequently, the 30% ZnFe2sub>O4sub>/BiVO4sub> catalyst afforded a degradation>4sub>-based catalysts.Moreover, the as-synthesized ZnFe2sub>O4sub>/BiVO4sub> heterojunctions were quite

Keywords： ZnFe2sub>O4sub>/BiVO4sub> Z-scheme heterojunction photocatalytic degradation

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Co-present Pb(II) accelerates the oxidation of organic contaminants by permanganate: Role of Pb(III)

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1530-y

Abstract:

• Simultaneous removal of organic contaminants and Pb(II) was achieved

Keywords： Permanganate Pb(II) oxidation MnO2sub> pH effect

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Title Author Date Type Operation

Synthesis of magnetic Pb/Fe

Hualiang AN, Xinqiang ZHAO, Zhiguang JIA, Changcheng WU, Yanji WANG

Journal Article

The stabilization effect of Al2sub>O3sub> on unconventional Pb/SiO2sub> catalyst

Journal Article

Rh2sub>O3sub>/hexagonal CePO4sub> nanocatalysts for N2sub>O decomposition

Huan Liu, Zhen Ma

Journal Article

A magnetic adsorbent based on salicylic acid-immobilized magnetite nano-particles for pre-concentration

Hossein Abdolmohammad-Zadeh, Arezu Salimi

Journal Article

acid anions on highly efficient Ce-based catalysts for selective catalytic reduction of NO with NH3sub>

Journal Article

Inexpensive synthesis of a high-performance Fe

Nadir Abbas, Godlisten N. Shao, Syed M. Imran, Muhammad S. Haider, Hee Taik Kim

Journal Article

Removal of P4sub>, PH3sub> and H2sub>S from Yellow Phosphoric Tail Gas by a Catalytic

Ning Ping,Hans-Jörg Bart,Wang Xueqian,Ma Liping,Chen Liang

Journal Article

Fe3sub>O4sub> encapsulated mesoporous silica nanospheres with tunable size and large void

Tingting LIU, Lihong LIU, Jian LIU, Shaomin LIU, Shi Zhang QIAO

Journal Article

On the monolayer dispersion behavior of Co3sub>O4sub> on HZSM-5 support: designing applicable

Journal Article

Synthesis of MnFe

Jian LI,Yue JIAO,Caichao WAN

Journal Article

Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective

Journal Article

Complete oxidation of methane on CoO-SnO catalysts

Xingfu TANG , Jiming HAO , Junhua LI ,

Journal Article

Effective regeneration of thermally deactivated commercial V-W-Ti catalysts

Xuesong SHANG, Jianrong LI, Xiaowei YU, Jinsheng CHEN, Chi HE

Journal Article

ZnFe2sub>O4sub>/BiVO4sub> Z-scheme heterojunction for efficient visible-light photocatalytic

Journal Article

Co-present Pb(II) accelerates the oxidation of organic contaminants by permanganate: Role of Pb(III)

Journal Article

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