INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Liming Zhao,Lijun Guo,Yuling Tang,Jianfei Zhou,Bi Shi
Research on the rational design of photocatalysts for efficient hexavalent chromium (Cr(VI)) reduction from Cr(VI)-containing wastewater has attracted widespread attention. In this paper, a novel g-C3N4/C/Fe2O3 photocatalyst was successfully synthesized by anchoring g-C3N4 nanosheets onto C/Fe2O3 that was prepared using collagen fiber as the biochar resource following the Fe tanning mechanism to reduce Cr(VI) under artificial solar irradiation. Under the same conditions, the as-prepared g-C3N4/C/Fe2O3 photocatalyst exhibited higher Cr(VI) reduction efficiency than g-C3N4, and the Cr(VI) reduction efficiency increased as Fe content in the g-C3N4/C/Fe2O3 photocatalyst increased. The enhanced photocatalytic performance was primarily ascribed to the formation of an indirect Z-scheme heterojunction between C/Fe2O3 and g-C3N4, which improved the separation efficiency of the photogenerated charge carrier. Furthermore, radical trapping indicated that photoinduced electrons (e–) were the main factor for Cr(VI) reduction. This work provides guidance for high value-added utilization of collagen fiber in constructing efficient light-driven photocatalysts and practical Cr(VI) removal from wastewater.
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
ENERGY & FUELS
·
2020
·
IF 3.421
Shiwei Ma,Shiyi Chen,Huijun Ge,Tao Song,Ping Lu,Wenguo Xiang
CeO2 is a typical fluorite oxide with desirable lattice oxygen conductivity and can be applied as an active support for the Fe-based oxygen carrier in chemical looping hydrogen generation (CLHG). However, Fe2O3/CeO2 always suffers from low thermal stability and sintering. Doping foreign cations could be a proper way to improve its reactivity and cyclic stability. In this work, Zr4+ and Sm3+, with a smaller ionic radius and lower valence than Ce4+, respectively, were doped into Fe2O3/CeO2 using the co-precipitation method, and the doping effects on the reactivity and redox stability of Fe2O3/CeO2 in CLHG were investigated. Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 provided the best redox reactivity, and the purity of generated hydrogen for all oxygen carriers reached nearly 100% (the detection limit of CO/CO2 was 0.01% in volume). The reactivity followed the sequence Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 > Fe2O3/Ce0.8Sm0.2O1.9 > Fe2O3/Ce0.75Zr0.25O2 > Fe2O3/CeO2. However, the concentration of oxygen vacancy was ranked as Fe2O3/Ce0.8Sm0.2O1.9 > Fe2O3/Ce0.6Sm0.15Zr0.25O1.925 > Fe2O3/Ce0.75Zr0.25O2 > Fe2O3/CeO2. The Zr doping boosted the reactivity of Fe2O3/CeO2 mainly by enhancing its sintering resistance, whereas the Sm doping achieved it mainly by promoting the oxygen conductivity, whose ability to improve the thermal stability of Fe2O3/CeO2 was rather limited. Both Zr and Sm doping could suppress the outward migration of Fe cations in the particles, resulting in higher sintering resistance. Furthermore, Zr and Sm could dissolve into CeO2 for prepared Fe2O3/Ce0.6Sm0.15Zr0.25O1.925; however, the bleeding out of both dopants was observed with Sm0.5Zr0.5O1.75 formation, which could be detrimental to the redox stability of the oxygen carrier.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
Hua Liu,Zumin Wang,Haiyan Li,Hao Wang,Ranbo Yu
Industrial wastewater containing both organic and inorganic pollutants is being generated all the time. Efficient materials are highly needed to purify the polluted water. Thus, a hierarchical structured α-Fe 2 O 3 with excellent adsorptive property has been synthesized by using a facile hydrothermal method. It can be prepared in macroscopic quantity. The as-synthesized α-Fe 2 O 3 with silkworm cocoon-like morphology shows high efficiency in adsorbing Congo red (CR), Methyl orange (MO) and Cr(VI). The removal efficiency of CR, MO and Cr(VI) can reach 99.2%, 83.9% and 100% under appropriate conditions. Besides, this α-Fe 2 O 3 shows high adsorptive ability for mixed CR and Cr(VI) in aqueous solution and the final removal rates can reach 94.7% and 97.9%, respectively. The adsorption kinetics fits well with the pseudo-second-order kinetic model. The results indicate that the product may find potential application in purification of wastewater containing both organic and inorganic pollutants.
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
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2018
·Vol. 56
·期 20
·2280-2285
·
IF 2.588
Dao-Guang Teng,Xian-Yong Wei,Zheng Yang,Zhi-Min Zong
Thermostable and fluorescent poly(phenylene methylene) (PPM) was synthesized via α-Fe 2 O 3 /attapulgite (α-Fe 2 O 3 / A )-mediated polymerization of benzyl chloride (BC) in CCl 4 in good yields. A carbocationic mechanism was proposed based on the controlling experiment. The structure and properties of PPM were characterized by Fourier transform infrared spectrometry, 1 H and 13 C nuclear magnetic resonance spectrometry, thermogravimetric analysis, elemental analysis, gel permeation chromatography, and UV–vis and fluorescence spectrometry. The results show that PPM possesses outstanding homoconjugation fluorescence and excellent thermal stability with onset decomposition temperature of ca. 420 °C. Recycled α-Fe 2 O 3 / A proved to be still highly active for BC polymerization. Moreover, the strategy features low-cost and readily accessible starting materials, simple one-pot operation, and recyclable catalyst, facilitating future applications. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56 , 2280–2285
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2013
·
IF 3.548
Zhenlong Zhang,Guangsheng Liu,Yanli Mao
To investigate the mechanisms of the improvement on separation efficiency of photogenerated carriers , a Fe 2 O 3 /SrTiO 3 heterojunction semiconductor with an improved separation efficiency was successfully prepared. The heterojunction semiconductor was characterized with X-ray diffraction (XRD), UV–vis absorption spectrum , scanning electron microscope (SEM) and surface photovoltage (SPV) spectroscopy. The energy band diagrams of Fe 2 O 3 and SrTiO 3 were determined with X-ray photoelectron spectroscopy (XPS), based on which the conduction band offset (CBO) between Fe 2 O 3 and SrTiO 3 was quantified to be 1.26 ± 0.03 eV. The recombination of photogenerated carriers was investigated with photoluminescence (PL) spectrum, which indicates that the formation of Fe 2 O 3 /SrTiO 3 decreases the recombination. Thus the improved separation efficiency is mainly due to the energy difference between the conduction band edges of Fe 2 O 3 and SrTiO 3 , and the decreased electron-hole recombination for Fe 2 O 3 /SrTiO 3 .
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 24
·期 5
·1227-1235
·
IF 1.624
Su Huanhuan,Lv Xiang,Zhang Zhengyi,Yu Jiajie,Wang Tianhe
Fe 2 O 3 –TiO 2 porous ceramic (Fe/TiPC) beads with photo-catalytic performances and high adsorption capacities were prepared by a simple high temperature solid reaction and were applied for arsenic removal from drinking water. The microstructure and morphology of Fe/TiPC were characterized by X-ray diffraction and scanning electron microscopy. More than 90% removal ratio for As (III) and As (V) were respectively achieved by Fe/TiPC within 2 h under UV irradiation. The Langmuir capacity values of Fe/TiPC for As (III) and As (V) were 13.86 and 15.73 mg/g, respectively. In addition, Fe/TiPC could be reused for up to five times without significant reduction in the photocatalytic sensitivity and adsorption capacity aspects. Good catalytic oxidation performances and high adsorption capacities as well as a sample preparation for Fe/TiPC suggest that the composites may have practical prospects for the As (III) and As (V) removal from contaminated water.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Dong Liu,Chunling Li,Tianjun Ni,Ranpeng Gao,Jiayu Ge,Fengquan Zhang,Weidong Wu,Jinliang Li,Qian Zhao
Currently, the photo-Fenton oxidation has been increasingly studied in the domain of contaminant elimination. However, the lack of active sites and the slow charge migration in the catalytic process, still limit its practical application. 3D/0D hybrids offer a better opportunity for improving photo-Fenton activity due to their high charge mobility and increased number of catalytic sites, which is highly desirable but remains a large challenge. Herein, 3D interconnected porous g-C 3 N 4 hybridized with Fe 2 O 3 QDs (FCN) was developed and exhibited a porous structure and large specific areas. A large number of active sites and rapid charge separation/migration were achieved by the loading of ultrasmall Fe 2 O 3 QDs on the surface of g-C 3 N 4 . Moreover, the high charge mobility of this material promoted the fast conversion of Fe 3+ to Fe 2+ , resulting in the optimum synergistic effect between the photocatalytic and Fenton oxidation processes. Thus, the FCN catalysts exhibited excellent photo-Fenton oxidation activity towards the decomposition of organic contaminants (such as phenol, 2,4-dibromophenol, 2,4,6-trichlorophenol, rhodamine B and methyl orange). In addition, the roles of active species in the photo-Fenton oxidation reaction were also studied, and the results imply that the hydroxyl radicals played the most important role in the degradation of organic contaminants.
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
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Juan Lu,Xiangyu Shan,Qian Wu,Yingjie Zhao,Chao Li,Huiling Li,Shuning Yang,Li Tian
Metal oxides containing iron and zinc (ZnO-Fe 2 O 3 ) combined with ruthenium bipyridine [Ru(bpy) 3 2+ ], graphene oxide (GO) and multi-walled carbon nanotube (MWNTs) were applied in the field of electrochemiluminescence (ECL). And a new solid-state ECL sensor for malathion determination by modifying ZnO-Fe 2 O 3 , Ru(bpy) 3 2+ , GO@MWNTs, Acetylcholinesterase (AchE) and Nafion on the electrode surface. The synthesized ZnO-Fe 2 O 3 and GO@MWNTs with large specific surface area were used as carrier to anchor Ru(bpy) 3 2+ and AchE, respectively. ZnO-Fe 2 O 3 and GO@MWNTs can also be used as accelerators to promote electron transfer of the system. ZnO-Fe 2 O 3 was also involved in the luminescence reaction, which increased the sensitivity of the system together with Ru(bpy) 3 2+ . Taking advantages of the electrocatalysis and electron transport capacity of ZnO-Fe 2 O 3 and GO@MWNTs, the sensor obtained stable and amazing ECL response. The ECL response value decreased after malathion was introduced. In the range of 6.6 × 10 −11 to 6.6 × 10 −7 M, the decrease value (ΔI) was linearly related to the logarithm of malathion concentration, and the detection limit was 2.2 × 10 −11 M. The method was simple and stable, and can be used to determine malathion in vegetable samples.
研究领域:
分析化学
·
环境科学
·
生物传感技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 7
·9733-9747
·
IF 4.672
Yingwei Xiong,Jinglan Wang,Min Jin,Xiaohong Wang
Summary Fe 2 O 3 is recognized as a promising oxygen carrier, but the susceptibility to sintering over the redox cycles limits its application. Although depositing Fe 2 O 3 on CeO 2 can simultaneously improve the activity and durability, the formation of CeFeO 3 will decrease the oxygen capacity and thus the efficiency of chemical looping water-gas shift reaction. Doping foreign elements can effectively mitigate the reaction between Fe 2 O 3 and CeO 2 and improve redox reactivity. This work employs Gd 3+ and Sm 3+ as doping elements and investigates the doping effect on hydrogen generation of Fe 2 O 3 /CeO 2 in water-gas shift with chemical looping. The characterizations demonstrate that both Gd and Sm are incorporated into the lattice of CeO 2 and increase the oxygen defect concentration, which boosts the redox reactivities. In addition, the interaction between the dopants and CeO 2 promotes the reduction depth by suppressing the solid reaction between Fe 2 O 3 and CeO 2 and improves the reoxidation reaction between reduced oxygen carriers with steam. As a result, Fe 2 O 3 /Ce 0.8 Sm 0.1 Gd 0.1 O 1.9 shows a high hydrogen yield (8.73 mmol.g −1 ) and hydrogen production rate (582.2 μmol.g −1 .min −1 ), which is 1.67 times higher than that of Fe 2 O 3 /CeO 2 . The performance remains stable over 40 cycles. The introduction of foreign cations may provide an effective method and significantly impact the oxygen carrier design.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-14
·
IF 36.3
Zhong Yihong,Yuan Guotao,Bao Dequan,Tao Yi,Gao Zhenqiu,Zhao Wei,Li Shuo,Yang Yuting,Zhang Pingping,Zhang Hao,Sun Xuhui
The heteroatom atomically doping strategy was reported to construct highly
efficient sites on metal oxides for the detection of low-concentration gas.
The atomically dispersed Sn atoms were intentionally incorporated into the Fe 2 O 3
lattice during the oxidative annealing of Fe-based metal organic framework,
leading to specific Sn–O–Fe sites, porous structures, and abundant oxygen
vacancies.
The optimized Sn-Fe 2 O 3 exhibited exceptional sensing performance for NO 2
detection: ultra-high sensitivity ( Rg / Ra =2646.6 to 1 ppm NO 2 ), ultra-low limit of
detection (10 ppb), and high selectivity.
研究领域:
材料科学
·
环境监测
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 14
·6856-6862
·
IF 7.79
Fan Yang,Chunzheng Wu,Hongbo Yu,Shiwei Wang,Tong Li,Bo Yan,Hongfeng Yin
Nanosized Au catalysts suffer from serious sintering problems during synthesis or catalytic reactions at high temperatures. In this work, we integrate dumbbell-shaped Au–Fe3O4 heterostructures into hollow ZrO2 nanocages to make Au–Fe2O3@ZrO2 yolk–shell nanoreactors with high activity as well as ultra-high sintering resistance for high-temperature CO oxidation. The synthesis starts with the fabrication of a (Au–Fe3O4)@SiO2@ZrO2 core–shell nanostructure with a Au–Fe3O4 dumbbell nanoparticle (DB) core and SiO2/ZrO2 double shells, followed by calcination and the selective removal of the inner SiO2 shell with alkaline solution to obtain Au–Fe2O3@ZrO2 nanoreactors. The retained ZrO2 hollow (outer) shells protect the Au NPs from aggregation at temperatures up to 900 °C and show excellent long-term stability. Compared to Au@ZrO2 yolk–shell nanoreactors, Au–Fe2O3@ZrO2 shows improved activity in CO oxidation due to the active Au–Fe2O3 interface. This strategy can be extended to other yolk–shell nanoreactors with various nanocomposites and for different catalytic reactions.
研究领域:
材料科学
·
催化化学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2018
·Vol. 25
·期 6
·1757-1763
·
IF 1.858
Guo Xuexin,Guo Huixiao,Wang Yifang,Li Yu,Liu Li,Li Haiying,Lian Hongwei,Cheng Yali
The mono-disperse Ho 2 O 3 –Fe 2 O 3 porous nanotubes were successfully synthesized via a facile electrospinning method. The morphologies, crystal structures and components of as-prepared samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Transmission electron microscope (TEM) and High Resolution Transmission Electron Microscopy (HRTEM), respectively. Then the samples were applied to construct gas sensor devices and their gas sensing properties were further investigated. The results showed that the Ho 2 O 3 –Fe 2 O 3 porous nanotubes with the weight ratio of 3 wt% exhibit an ultra-high response to acetone (185/100 ppm) at the optimal operating temperature of 240 °C. Meanwhile, the detection limit of the sensor is estimated to be 500 ppb with a response of 2.4. The sensor also owned good linear characteristic (0–200 ppm) and selectivity, demonstrating the sensor based on Ho 2 O 3 –Fe 2 O 3 porous nanotubes has a promising application for detecting acetone. Thus, further improvement of gas sensing properties in metal-oxide-semiconductors materials could be realized by forming porous nanocomposite.
研究领域:
材料科学
·
传感器技术
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）