APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Yongkui Li,Suqin Li,Xiaodong Pan,Xin Zhao,Penghui Guo
Arsenic (As), a carcinogenic heavy metal, is a toxic environmental pollutant that threatens human and environmental health. Here, a cost-effective and high-performance Fe-based calcium silicate hydrate (Fe-CSH) was synthesized through a one-step alkaline activation process using steel slag as an in situ Ca and Fe source to treat As(V)-containing solutions. The synthesized Fe-CSH exhibited a flower-like structure with numerous interleaving nanosheets, which provided abundant adsorption sites. More importantly, this compound could remove large quantities of As(V) from wastewater, achieving maximum adsorption capacities of up to 141.5 mg/g at a pH of 5. The adsorption kinetics were consistent with a Langmuir isotherm model and followed pseudo-second-order and intra-particle diffusion kinetics. Thermodynamics analyses indicated that the adsorption process was spontaneous and feasible. XRD, FTIR, SEM, TEM, and XPS analyses indicated that the outstanding adsorption performance of the Fe-CSH could be due to the release of Ca 2+ and OH – from this material. The released Ca 2+ reacted with arsenate ions via coprecipitation, whereas OH – promoted the generation of Fe hydroxide from iron ions, which adsorb As(V) by forming stable bidentate surface complexes. Ultimately, a potential process was proposed for the remediation of As-containing wastewater using hierarchically structured Fe-CSH derived from steel slag. The “trash-to-treasure” strategy implemented for the repurposing of steel slag and the remediation of As-contaminated wastewater are both conducive to sustainable development.
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高影响因子
FUEL
·
2022
·
IF 8.035
Yi-Tong Wang,Xiao-Man Wang,Di Gao,Fu-Ping Wang,Ya-Nan Zeng,Jun-Guo Li,Li-Qun Jiang,Qing Yu,Rui Ji,Le-Le Kang,Ya-Jun Wang,Zhen Fang
In this study, nanocatalysts for biodiesel production were prepared via wet impregnation of blast furnace dust (BFD) in Na 2 CO 3 (Na-BFD) and CaCO 3 (Ca-BFD) suspension solutions and calcination at 500 and 600 °C, respectively. Biodiesel yields of 100.0 wt% (Na-BFD 500 ) and 98.3 wt% (Ca-BFD 600 ) were achieved at 65 °C. Synthesized catalysts showed outstanding activity and recyclability, due to the transition of CaCO 3 , Na 2 CO 3 and Fe 2 O 3 to nanocrystals of NaFeO 2 (29.9 nm), Ca 2 Fe 2 O 5 (10.5 nm), CaO (100.1 nm) and Ca 2 Fe 2 O 5 (50.0 nm). Na-BFD 500 achieved 95.8 wt% biodiesel yield with 16 cycles, whereas Ca-BFD 600 reached 94.1 wt% biodiesel yield with 7 cycles via magnetic separation. BFD containing convertible magnetic and active components (Fe 2 O 3 and CaCO 3 ) was an ideal raw material to synthesize catalyst for biodiesel production with high catalytic efficiency and easy separation. The study provided a practical utilization of industrial solid waste for biodiesel production.
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高影响因子
ACS Applied Energy Materials
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2022
·
IF 6.959
Zihan Chen,Xihong Zu,Liheng Chen,Yi Qi,Wenbin Jian,Yaoying Wu,Wenli Zhang,Xuliang Lin,Guobin Yi,Quanbing Liu,Zilun Tang,Jianyu Wu,Huafeng Dong,Yanlin Qin
The development of high-performance flexible supercapacitors is desperately desired for application in wearable electronics, but the fabrication of a flexible self-supporting 3D electrode with light weight and high energy density remains challenging. Herein, we report an approach to fabricate the flexible self-supporting and lightweight 3D G-PPy@Fe-MnCo2O4 hierarchical electrode for flexible solid-state supercapacitors (FSSCs), which utilizes the active material 3D G-PPy as a substrate to vertically grow Fe-MnCo2O4 nanowire (NW) arrays. Importantly, the experimental results and DFT simulations indicate that Fe-MnCo2O4 NWs obtain metallic characteristics by doping Fe into a MnCo2O4 lattice, which induces the free propagation of electrons in the electrode. Thus, MnCo2O4 utilization efficiency and cycle performance are both greatly enhanced. The electrode has a high areal specific capacitance of 5136 mF cm–2 (422.4 F g–1) at 2 mA cm–2 with long-term cycle stability. The capacitance retention is about 94.7% after 7000 cycles. It presents a viable design route toward advanced wearable energy storage devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Chenxi Zhu,Yingjun Wang,Longyu Qiu,Yequn Liu,Haibo Li,Yongsheng Yu,Jiaming Li,Weiwei Yang
Fenton reaction is proved to be an efficient method for degrading organic pollutants in wastewater. However, the narrow pH range greatly restricts the application of Fenton reaction. Herein, the 3D hierarchical Fe-doped Bi 4 O 5 I 2 microflowers have been synthesized via a hybrid solvothermal-calcination method and applied in a photo-Fenton system for efficient removal of tetracycline (TC). The optimized Fe-doping Bi 4 O 5 I 2 (11Fe-BOI) microflowers present more than 90% degradation efficiency over the pH range of 3.0–9.0 in Fenton system under visible light irradiation, and the reaction rate constant in 11Fe-BOI/H 2 O 2 /Vis system is 2.79 × 10 −2 min −1 , which is 19.11, 1.85 and 7.71 times higher than that of H 2 O 2 /Vis (1.46 × 10 −3 min −1 ), 11Fe-BOI/Vis (1.51 × 10 −2 min −1 ) and 11Fe-BOI/H 2 O 2 (3.61 × 10 −3 min −1 ) systems, respectively. The synergy effect of photocatalysis and Fenton reaction plays a pivotal role for the TC degradation process via accelerating the separation of carriers and the generation of reactive oxygen species. The scavenging experiments and EPR results manifest that O 2 – and OH are dominant active species during the TC degradation process. This work provides great prospect to fabricate an efficient non-noble metal photocatalyst for photo-Fenton degradation of antibiotics.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Rongsheng Ning,Heliang Pang,Zhongsen Yan,Zhenyu Lu,Qiankun Wang,Zengling Wu,Wenxin Dai,Lingshan Liu,Zhongsheng Li,Gongduan Fan,Xianzhi Fu
The development of high efficient photocatalysts for antibiotics contamination in water remains a severe challenge. In this study, a novel step-scheme (S-scheme) photocatalytic heterojunction nanocomposites were fabricated from integrating AgCl nanoparticles on the MIL-100(Fe) octahedron surface through facile multi-stage stirring strategy. The S-scheme heterojunction structure in AgCl/MIL-100(Fe) (AM) nanocomposite provided a more rational utilization of electrons (e - ) and holes (h + ), accelerated the carrier transport at the junction interface, and enhanced the overall photocatalytic performance of nanomaterials . The visible-light-driven photocatalysts were used to degrade sulfamethazine (SMZ) which attained a high removal efficiency (99.9%). The reaction mechanisms of SMZ degradation in the AM photocatalytic system were explored by electron spin resonance (ESR) and active species capture experiments, which superoxide radical (•O 2 - ), hydroxyl radical (•OH), and h + performed as major roles. More importantly, the SMZ degradation pathway and toxicity assessment were proposed. There were four main pathways of SMZ degradation, including the processes of oxidation , hydroxylation, denitrification, and desulfonation. The toxicity of the final products in each pathway was lower than that of the parent according to the toxicity evaluation results. Therefore, this work might provide new insights into the environmentally-friendly photocatalytic processes of S-scheme AM nanocomposites for the efficient degradation of antibiotics pollutants.
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PubMed
高影响因子
FUEL
·
2022
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IF 8.035
Xiuquan Li,Zhongqing Yang,Li Zhang,Ziqiang He,Yunfei Yan,Jingyu Ran,Zukhra C. Kadirova
The catalytic reaction of ethane with CO 2 promotes the value-added conversion of natural gas and the resource utilization of greenhouse gases. In this work, the CO 2 -assisted ethane dehydrogenation reaction characteristics on Fe 1.5 Ni 0.5 /ZrO 2 (M, T, Mix) catalyst with different crystal plane structure were studied through catalyst activity test, catalytic reaction kinetics study and catalyst characterization analysis. It is found that the exposed crystal faces of the ZrO 2 -supported catalyst has a significant effect on the CO 2 -assisted ethane oxidative dehydrogenation reaction. The monoclinic phase Fe 1.5 Ni 0.5 /ZrO 2 -M catalyst exhibits the largest conversion of ethane (21.8%) and CO 2 (25.2%) and the maximum selectivity to C 2 H 4 (80.5%). Monoclinic phase of ZrO 2 selectively exposes the ( −1 1 1) and (1 1 1) low-index surfaces with higher oxygen vacancy (O v ) density and stronger metal-support interaction, which leads to the formation of more Fe x Zr 1-x O 2 structures with high catalytic activity. The reductive oxygen vacancy O v and Fe 2+ -O-Zr 3+ sites promote the activation of CO 2 through the cleavage of C=O bond to supplement O* species. The O* species on the oxidative Fe 3+ -O-Zr 4+ site are captured and combined with H* species derived from the selective cleavage of ethane C–H bond to generate H 2 O.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Ying Cai,Jinhong Fan,Zhigang Liu
This study constructed a FeS-based Fenton-like process to explore the degradation of TTC in the presence of copper ions . The acidic condition of pH 3 was more favorable to the H 2 O 2 decomposition and TTC degradation , and it was slightly enhanced by Cu(II). The production of •OH from H 2 O 2 was revealed through radical scavenging and benzoic acid probe experiments, and the ratio of H 2 O 2 decomposition to •OH production was about 1–1.5, which is comparatively consistent with the theoretical ratio. FeS-based Fenton process was proved to be a homogenous system, the slow release of Fe(II) source and the autocatalytic cycle of Fe(III) to Fe(II) resulting from the reductive species of TTC and dissolved S(-II) improved the production of •OH and the degradation of TTC, which was proved by comparing TTC degradation, TOC removal, H 2 O 2 decomposition and Fe(II) concentration with different iron sources (FeS, Fe(II) and Fe(III)) and external addition of dissolved S(-II). The possible degradation pathways of TTC were subsequently inferred according to the detected products by LC-MS. Understanding these autocatalytic processes is essential to reveal the transformation of redox-active substances in environments and may have potential significance in applying FeS-based Fenton-like process for the treatment of wastewater containing reductive organic matters.
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高影响因子
WATER ENVIRONMENT RESEARCH
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2022
·Vol. 94
·期 4
·e10714
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IF 3.306
Yao Shi,Yifei Xing,Zhilian Song,Xueming Dang,Huimin Zhao
Fe–Mn binary oxide (FMBO) is a promising adsorbent for As(III) removal through combined adsorption and oxidation. The calcined oyster shell-supported Fe–Mn binary oxide (FMBO/OS) adsorbent was synthesized by the co-precipitation method. Results indicated that the calcined oyster shell, as a carrier, improved the stability of FMBO and its adsorption capacity for As(III). The maximum adsorption capacity of FMBO/OS on As(III) reached 140.5 mg·g −1 . Under pH 5.0 and 25°C, the removal efficiency of FMBO/OS to As(III) solution (C 0 = 10 mg·L −1 ) reached 87% within 12 h. Moreover, based on the characterization analyses, the removal mechanisms of As(III) were deduced to include the combined adsorption and oxidation process of FMBO and the synergistic effect of oyster shells. This work provides new insights into synthesizing efficient and green adsorbents to remove aqueous As(III). Meanwhile, it provides technical support for reusing waste biomass materials such as the oyster shell. Practitioner Points FMBO/OS was prepared by a simple hydrothermal co-precipitation method. The carrier alleviates the agglomeration of Fe–Mn oxides. The adsorbent shows a strong adsorption capacity of As(III) and good selectivity. The good results benefit from the synergistic effect of calcium arsenate generation. The prepared adsorbent can adsorb arsenic in real samples.
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高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 13
·3251-3258
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IF 7.779
Chun-Feng Wang,Jin Chuan Wu,Qingxin Li
A new spin crossover-fluorescent compound whose magnetic and fluorescence properties can be simultaneously controlled by multiple external stimuli was prepared. This compound possesses a 2D Hoffman-type structure and its spin crossover transition usually demonstrates high sensitivity toward intriguing effects such as the change of solvent guests. Due to the strong correlations between the spin state and fluorescence emission, the magnetic and fluorescence properties of this material can be synchronously tuned by not only physical thermal treatment, but also the chemical stimuli of solvent guests. Upon desorption or adsorption of the solvent guests, both the temperature-dependent magnetic susceptibility and fluorescence intensity can be reversibly varied between three-, one-, and two-stepped transitions, accompanied by wide thermal hysteresis loops. The synchronous control of magnetic and fluorescence behaviors through multiple external stimuli may give a new perspective to developing novel multifunctional materials.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 47
·72058-72073
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IF 5.19
Gao Jingqing,Liu Xiaobang,Ren Peng,Gao Jianlei,Chen Yong,Chen Zhijun
The novel iron-based reductive particles, functionalized with amino and carboxylic functional groups, were synthesized to remove Cr(VI) and Cd(II) ions from aqueous solutions. The morphological structure and surface functional groups of new composites were characterized with SEM, XRD, FTIR, BET, and other techniques. The influence of pH, initial concentration, adsorbent dosing, and temperature on removal efficiencies were explored by batch experiments. The adsorption capacity of Cr(VI) and Cd(II) increased by 159.95% and 76.60%, respectively, compared with Fe 0 , reaching 47.638 and 62.047 mg/g. EDS and XPS analysis showed most of Cr(VI) was reduced to Cr(III) and precipitated as ferrochrome oxide, and Cd(II) was mainly precipitated as hydroxide. Reduction-precipitation and complexation may predominate in the removal process of Cr(VI), which fitted well with Langmuir and Freundlich models and pseudo-second-order kinetics. While hydrolysis and complexation may prevail for Cd(II), which was suited with Langmuir model and pseudo-second-order kinetics. Having good magnetic properties, the A/C-Fe@SiO 2 particles exhibited excellent reusable stability after four times regeneration experiments, promising a prospect for in-situ remediations of groundwater contaminated by Cr(VI) and Cd(II).
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
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IF 4.598
Xiaoyue Liu,Hongtao Xie,Jian Mao
The porous electrodes derived from Prussian blue analogs (PBAs) show high specific capacity and superior energy densities in supercapacitors due to their tunable chemical compositions, open three-dimensional network framework and large surface area. In this work, La-Fe PBA with different morphologies is prepared at mild conditions via controlling the composition of mixed solvent and the structural evolution of the La-Fe PBA is further explored. The solubility of K 3 [Fe(CN) 6 ] and the influence of ethanol on the crystal growth is used to control the synthesis of La-Fe PBA. Four different morphologies of La-Fe PBA, such as chamfered hexagonal bipyramid microcrystals, hexagonal flakes, erythrocyte-like microstructure and small flakes, are successfully synthesized by changing the ethanol/water ratio of mixed solvent. The porous LaFeO 3 with the same shape is obtained by calcining the La-Fe PBA at 500 °C, which is subsequently employed as electrodes for battery-type supercapacitor. The erythrocyte-like LaFeO 3 shows remarkable specific capacity (330 C g −1 ) at 1 A g −1 , energy density (23.8 Wh kg −1 ) and power density (400 W kg −1 ) at 1 A g −1 . This work could provide a porous material for high-performance supercapacitors as well as an exciting strategy to develop and design materials with specific morphology.
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 16
·6252-6262
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IF 8.067
Zhaoju Yu,Qikun Zhu,Fen Li,Ting Chen,Hanzi Du
In the present work, novel single-source-precursors for CNTs/Fe3Si/Fe/SiOCN ceramic nanocomposites were synthesized by the reaction of poly(methylvinyl) silazane (HTT 1800) with ferric acetylacetonate [Fe(acac)3] and carboxylic functionalized carbon nanotubes (CNTs-COOH), which were characterized by means of Fourier transform infrared spectra. The microstructure, phase evolution, electromagnetic properties and electromagnetic microwave absorbing (EMA) performance of the as-prepared ceramics were investigated in detail. The results reveal that the introduced CNTs and the in situ formed nanocrystallites, including α-Fe, Fe3Si, α-Si3N4, β-Si3N4, Si2N2O, and SiC, are dispersed in an amorphous SiOCN matrix after annealing at 900–1500 °C. The obtained ceramic powders mixed with paraffin wax possess a very low minimum reflection coefficient of −65.3 dB and a broad effective absorption bandwidth of 6 GHz (12–18 GHz) with a thickness of 1.6 mm, indicating outstanding EMA performance. This is due to (i) the increase in interfacial polarization caused by the formation of multiple hetero-interfaces and (ii) the synergistic effect of magnetic and dielectric losses. Therefore, the multicomponent CNTs/Fe3Si/Fe/SiOCN ceramic nanocomposites have promising potential for thin and high-performance EMA materials applied in a harsh environment.
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高影响因子
危险品化学品经营许可证（带存储）