CHEMOSPHERE
·
2024
·
IF 8.1
Liyan Wang,Bojie Jia,Zedong Teng,Hao Cao,Yanli Miao,Huiyuan Guo,Tinggang Li
The bioaccumulation and toxicity of heavy metals are serious threats to human activities and ecological health. The exploitation of environmentally friendly passivated materials is major importance for the remediation of heavy metal contaminated soil. This research developed a new type of environmental functional material with a core-shell structure, which is an iron-based material functionalized with phosphorus and carbon from sludge for heavy metal pollution remediation. The results indicated that the C/P@Fe exhibits excellent heavy metal removal ability, and the maximum removal rates of the two heavy metals in simulated wastewater could reach 100% under optimum reaction conditions. It also effectively converts the labile Cr/Pb into the stable fraction after 28 days of incubation, which increased the maximum residual fraction percentage of Cr and Pb by 32.43% and 160% in soil. Further analysis found that the carbon layer wrapped around the iron base could improve the electron transport efficiency of reducing iron, phosphorus and ferrum could react with heavy metal ions to form stable minerals, such as FeCr 2 O 4 , FeO·Cr 2 O 3 , Pb 5 (PO 4 ) 3 OH, PbCO 3 , 2PbCO 3 ·Pb(OH) 2 and PbS, after reacting with C/P@Fe. The study demonstrated that the Iron-based materials functionalized with carbon and phosphorus from sludge provided a more efficient way to remove heavy metals.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Li Long,Xuechun Wang,Heyun Fu,Xiaolei Qu,Shourong Zheng,Zhaoyi Xu
Iron-based materials are effective for the reductive removal of the disinfection byproduct bromate in water, while the construction of highly stable and active Fe-based materials with wide pH adaptability remains greatly challenging. In this study, highly dispersed iron phosphide-decorated porous carbon (Fe2P(x)@P(z)NC-y) was prepared via the thermal hydrolysis of Fe@ZIF-8, followed by phosphorus doping (P-doping) and pyrolysis. The reduction performances of Fe2P(x)@P(z)NC-y for bromate reduction were evaluated. Characterization results showed that the Fe, P, and N elements were homogeneously distributed in the carbonaceous matrix. P-doping regulated the coordination environment of Fe atoms and enhanced the conductivity, porosity, and wettability of the carbonaceous matrix. As a result, Fe2P(x)@P(1.0)NC-950 exhibited enhanced reactivity and stability with an intrinsic reduction kinetic constant (kint) 1.53–1.85 times higher than Fe(x)@NC-950 without P-doping. Furthermore, Fe2P(0.125)@P(1.0)NC-950 displayed superior reduction efficiency and prominent stability with very low Fe leaching (4.53–22.98 μg L–1) in a wide pH range of 4.0–10.0. The used Fe2P(0.125)@P(1.0)NC-950 could be regenerated by phosphating, and the regenerated Fe2P(0.125)@P(1.0)NC-950 maintained 85% of its primary reduction activity after five reuse cycles. The study clearly demonstrates that Fe2P-decorated porous carbon can be applied as a robust and stable Fe-based material in aqueous bromate reduction.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2021
·Vol. 17
·期 7
·2007334
·
IF 13.281
Caichi Liu,Yu Han,Libing Yao,Limin Liang,Jiayin He,Qiuyan Hao,Jun Zhang,Ying Li,Hui Liu
Developing cost-effective and high-efficiency electrocatalysts toward alkaline oxygen evolution reaction (OER) is crucial for water splitting. Amorphous bimetallic NiFe-based (oxy)hydroxides have excellent OER activity under alkaline media, but their poorly electrical conductivity impedes the further improvement of their catalytic performance. Herein, a bimetallic NiFe-based heterostructure electrocatalyst that is composed of amorphous NiFe(OH) x and crystalline pyrite (Ni, Fe)Se 2 nanosheet arrays is designed and constructed. The catalyst exhibits an outstanding OER performance, only requiring low overpotentials of 180, 220, and 230 mV at the current density of 10, 100, and 300 mA cm −2 and a low Tafel slope of 42 mV dec −1 in 1 m KOH, which is among the state-of-the-art OER catalysts. Based on the experimental and theoretical results, the electronic coupling at the interface that leads to the increased electrical conductivity and the optimized adsorption free energies of the oxygen-contained intermediates plays a crucial role in enhancing the OER activities. This work focusing on improving the OER performance via engineering amorphous-crystalline bimetallic heterostructure may provide some inspiration for reasonably designing advanced electrocatalysts.
研究领域:
材料科学
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电化学
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能源转换与储存
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
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IF 3.057
Peng Jing,Qiong Wang,Boya Wang,Mingwu Xiang,Hongjun Jiang,Yin Zhang,Yunhong Wei,Yun Zhang,Hao Wu,Heng Liu
Diverse Fe-based nitrides and phosphides have drawn considerable attention owing to their abundant source, high theoretical capacities, and environment benignity. However, it still remains a crucial challenge to develop a facile preparation approach of robust Fe-based anode materials for the next-generation durable lithium-ion batteries. Herein, we constructed two type polycystic microsphere anode materials (Fe 2 N@C/CNTs and FeP@C/CNTs) through a scalable industrial spray-drying technology combined with following chemical nitridation/phosphorization conversion strategy. Both the resultant Fe 2 N@C/CNTs and FeP@C/CNTs materials exhibit unique hierarchical polycystic microsphere structure and improved conductive network caused by the incorporation of amorphous carbon and dense CNTs coating layers. The unique structure merits endow these capabilities of facilitating electrons/ions transport and accommodating notorious volume change during charge-discharge cycling. Consequently, the Fe 2 N@C/CNTs and FeP@C/CNTs anode materials deliver enhanced rate capability (216 and 232 mA h g −1 , respectively, at a high current density of 5 A g −1 ) and durable cycling stability with reversible capacities of 489 and 571 mA h g −1 at 0.5 A g −1 after 500 cycles, respectively. In addition, this work also provides a transplantable preparation strategy for other conversion-type anode materials with poor electrical conductivity and large volume effect.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yuxin Liu,Qintie Lin,Jieyi Pan,Yirong Deng,Junli Zheng,Mingchao Lyu,Hao Luo,Yang Luo
The existing remediation technologies for Cr(VI) contamination soil suffer from long processing times. Microwave catalysis is an efficient environmental remediation technology, and the reasonable design of microwave catalysts can enable a microwave catalytic system to rapidly complete the remediation of Cr(VI). In this study, a microwave catalyst, NRFC-3, with high microwave absorption performance and electron density was designed via a nitrogen enrichment strategy. Density functional theory (DFT) calculations verified that the electron density of the material was increased by nitrogen-enriched strategy. Under the experimental conditions, the electrons (e − ) of NRFC-3 originate from “hot spots” and the current density is not lower than 3.78 × 10 9 e·g −1 ·s −1 . In addition, the reduction of Cr(VI) in the MW/NRFC-3 system is feasible through DFT predictions, and this conclusion was experimentally verified. The MW/NRFC-3 system has a remediation efficiency of 100 % for Cr(VI)-contaminated soil within 25 min, significantly reduced the toxicity of Cr(VI) to the environment and humans, and had long-term stability. The potential application of the MW/NRFC-3 system was verified by remediation experiments on Cr(VI)-contaminated soils of different degrees. This study provides a new technology for the rapid and harmless treatment of Cr(VI)-contaminated soil.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yuanyuan Zhang,Fenghong Lu,Kaicai Fan,Jiayi Zhao,Zumin Wang,Lingbo Zong
Iron-based single-atom catalysts (SACs) are considered to the most promising catalysts to replace Pt for efficient oxygen reduction reaction (ORR). However, the precise synthesis of high-performance SACs and the understanding of their ORR origin remain challenging. In this work, microporous nitrogen-doped carbon with abundant and accessible atomically dispersed N-coordinated Fe sites (Fe-N-C) is prepared by molecular-confined coupling pyrolysis strategy. The Fe-N-C exhibits excellent ORR activities in acid (E 1/2 of 0.78 V vs. RHE) and alkaline (E 1/2 of 0.91 V vs. RHE) electrolytes. When integrated into a rechargeable aqueous Zinc-air battery (ZAB), both large specific capacity (770 mAh g −1 ) and high peak power density (240 mW cm −2 ) are achieved. Remarkably, the as-prepared ZAB presents amazing charge-discharge cycle performance of 1600 h at the large current density, which is 52.5 times of that using Pt/C+RuO 2 . Furthermore, all-solid-state ZAB delivers ultra-robust cycling stability even under bending. This work may advance a critical step towards the design of rational and controlled preparation of remarkable and ultra-stable catalysts.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Yanling He,Xiaoqing Hu,Muxian Xu,Alan Man Ching Ng,Aleksandra B. Djurišić
We synthesized mesoporous silica nanospheres (MSNs) with small particle size (under 100 nm) and large surface areas (>800 m 2 /g) by modified Stöber method. We investigated coating of oxygen adsorber materials (iron-based and titania-based) by atomic layer deposition on the prepared MSNs. We found that MSNs without any coating are capable of adsorbing oxygen by physisorption , and that due to their high surface areas they can outperform commercial oxygen scavengers for atmospheres with moderate and low humidity levels. Their performance is further enhanced for optimized thickness of FeO x or TiO x coating, where chemisorption contributes to oxygen scavenging process. To further investigate the oxygen adsorption on MSNs, samples with different annealing times were prepared and characterized, and the oxygen adsorption could be attributed to incomplete removal of silicon precursor residue. While the samples with prolonged annealing time do not exhibit oxygen adsorption, the high oxygen adsorption capacity can be restored by glucose treatment which results in carbon-based surface coating of MSNs. Due to their fast response and high oxygen adsorption capacity, the prepared materials are highly promising as oxygen scavengers, in particular for applications in dry environments where humidity activation is undesirable.
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhe Zhang,Yusan Turap,Yongkang Wang,Yidi Wang,Zhentong Wang,Wei Wang
Thermochemical hydrogen storage technology based on iron-based materials has received significant attention owing to its low cost, safety features, and high volumetric hydrogen storage density. However, no consensus has been established on the optimal temperature range for hydrogen storage. This study investigated the impact of hydrogen storage temperature on hydrogen consumption capacity, hydrogen release capacity, and hydrogen storage energy consumption. The hydrogen storage temperature was optimized with the objectives of low energy consumption and high hydrogen storage density. The experiments were conducted using thermogravimetric analyzer and gram-scale packed-bed reactor setups, accompanied by thermodynamic and kinetic calculations. The research indicated that at 550 °C, the optimal hydrogen storage temperature, the lowest relative energy demand was 32.30 %, with the hydrogen consumption capacity reaching the theoretical maximum value of 4.8 %, and the hydrogen release capacity reaching 4.04 %. Furthermore, achieving the theoretical maximum value of hydrogen consumption capacity became exceedingly difficult when the hydrogen storage temperature exceeded 570 °C. Microstructural characterization and kinetic calculations revealed that this phenomenon was attributed to the formation of a dense iron layer on the particle surface, which impeded the solid-state diffusion of oxygen atoms. The formation of the intermediate phase wüstite was identified as the cause of the formation of the dense iron layer. Overall, this study provided theoretical support for iron-based thermochemical hydrogen storage processes and offered a perspective into the reaction behavior of the reduction of magnetite with hydrogen.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Advanced Healthcare Materials
·
2022
·Vol. 11
·期 22
·2201740
·
IF 11.092
Hongjie Zhang,Wanqian Zhang,Hong Qiu,Gui Zhang,Xin Li,Haiping Qi,Jingzhen Guo,Jie Qian,Xiaoli Shi,Xian Gao,Daokun Shi,Deyuan Zhang,Runlin Gao,Jiandong Ding
The new-generation coronary stents are expected to be biodegradable, and then the biocompatibility along with biodegradation becomes more challenging. It is a critical issue to choose appropriate biomimetic conditions to evaluate biocompatibility. Compared with other candidates for biodegradable stents, iron-based materials are of high mechanical strength, yet have raised more concerns about biodegradability and biocompatibility. Herein, a metal-polymer composite strategy is applied to accelerate the degradation of iron-based stents in vitro and in a porcine model. Furthermore, it is found that serum, the main environment of vascular stents, ensured the safety of iron corrosion through its antioxidants. This work highlights the importance of serum, particularly albumin, for an in vitro condition mimicking blood-related physiological condition, when reactive oxygen species, inflammatory response, and neointimal hyperplasia are concerned. The resultant metal-polymer composite stent is implanted into a patient in clinical research via interventional treatment, and the follow-up confirms its safety, efficacy, and appropriate biodegradability.
研究领域:
医学工程
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材料科学
·
心血管医学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaojun Wang,Haichang Li,Changmeng Xu,Hongran Sun,Cheng Fan,Wenming Song,Huifang Li,Jiangshan Gao,Zhiming Liu,Yan He
Sodium-ion batteries (SIBs) have attracted widespread attention because of the economic benefit of low-cost and abundance of sodium resources. Iron-based electrodes (sulfide, selenide and phosphide) that operate through conversion mechanism have shown huge potential for excellent sodium-ion storage. However, the problems related with serious volume expansion and lack of general synthesis methods of iron-based materials shorten the cycle life and hindered their application in SIBs. Herein, a general synthetic strategy of electrospinning process was developed to achieve the yolk-shelled Fe x Q y @C (Q = S, Se and P) film for binder-free anode of high-performance SIBs. Such method has more precursor materials to choose from and is highly scalable. More importantly, the designed electrodes have a unique yolk-shell structure and a three-dimensional conductive network. When applied as a binder-free anode of SIBs, all three samples exhibit outstanding sodium storage performance (FeS 2 @C-40: remaining 280 mAh g −1 after 400 cycles at 1 A g −1 , Fe 7 Se 8 @C-40: remaining 186.5 mAh g −1 after 200 cycles at 0.1 A g −1 and FeP 4 @C-40: remaining 205 mAh g −1 after 1000 cycles at 0.5 A g −1 ). Therefore, the scalability and universality of this general synthetic strategy can open up a new direction for the exploration of high-energy density and flexible electrode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 20
·14873-14883
·
IF 9.5
Qianqian Wang,Xiaoyan Ma,Ran Bi,Xiangpan Hu,Senyang Song,Pengcheng Ma,Fang Chen
Investigating a single multifunctional electrode in an integrated device, such as self-powered overall water splitting (OWS), is extremely valuable since it may substantially decrease the system complexity and expense. Hence, a full rice-spike-like 400N-CDs/FeNi-TDC nanoarray combining N-hybridized carbon dots (N-CDs) and FeNi-TDC with 2,5-thiophenedicarboxylic acid (H2TDC) as ligands is constructed on the surface of a nickel foam by a one-pot solvothermal method for OWS and supercapacitor applications. Based on interface-heterojunction engineering, the morphology and electronic environment at the active sites of the nanomaterial successfully controlled by N-CDs and the heterojunction synergistically promoted efficient catalysis. The optimized 400N-CDs/FeNi-TDC electrode exhibits a 209 mV overpotential and a Tafel slope of 18.91 mV dec−1 at 10 mA cm−2 during the oxygen evolution reaction (OER) activity, as well as a low overpotential of 99 mV to reach 10 mA cm−2 with a Tafel slope of 77.01 mV dec−1 in the hydrogen evolution reaction (HER). As the positive electrode of the supercapacitor, the high specific capacitance of 400N-CDs/FeNi-TDC is 2388 F g−1 at 1 A g−1. The assembled self-powered OWS device uses the 400N-CDs/FeNi-TDC‖AC/NF with pre-charged 3 V as the power supply to achieve simultaneous green hydrogen and oxygen production for ∼4 min. This research provides a new platform to build state-of-the-art and sustainable energy conversion and storage devices.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源化学
·
催化化学
·
功能材料
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 96
·93419-93427
·
IF 3.289
Dandan Lv,Hongfei Shao,Xiang Gao,Ke Lu,Haifeng Lu,Houyi Ma
Super-hydrophobic surfaces are usually prepared by manipulating the surface roughness and surface chemistry of various materials. Herein, we report two facile, environmentally friendly and inexpensive methods for the fabrication of super-hydrophobic (SH) coatings on cold rolled steel (CRS) and iron substrates using electrodeposition and etching to control surface roughness in combination with the self-assembly technique. By modifying the rough surfaces with stearic acid (SA) and hydrolysed octyltriethoxysilane (OTES), the water contact angles (WCA) of the super-hydrophobic ZnO coatings reaches up to 160° and the WCA of the super-hydrophobic coatings on etched iron is 155°. The mechanisms for the formation of the super-hydrophobic coatings fabricated by SA and OTES self-assembled thin films on rough steel and iron substrates are investigated by means of attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Electrochemical impedance spectroscopy (EIS) results show that the SH coatings effectively protect the substrate metals from corrosion in 3.5% NaCl solution and increase the inhibition efficiency to approximately 93% and 86%, for the super-hydrophobic ZnO coating and super-hydrophobic silica coating on etched iron, respectively.
研究领域:
材料科学
·
表面工程
·
腐蚀科学
✓ 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）