OPTICAL MATERIALS
·
2021
·
IF 3.08
Xuyang Li,Zongxue Yu,Liangyan Shao,Xiaofang Feng,Haojie Zeng,Yuchuan Liu,Runxuan Long,Ximei Zhu
In order to effectively solve the two major problems of photocatalyst recovery and membrane fouling , this research combines photocatalyst and membrane separation technology . In this study, the NH 2 -MIL-88B(Fe)/CDs@GO material with good photocatalytic properties was synthesized by hydrothermal method and mechanical stirring, and the photocatalytic membrane was obtained by vacuum filtration. The results show that the NH 2 -MIL-88B(Fe)/CDs@GO membrane can effectively intercept and degrade methylene blue (MB). After 10 cycles, the rejection rate of MB can still reach 99.5%, which is about 2.5 times of pure GO membrane (40%). After 15 min of visible light irradiation, the Flux recovery rate (FRR) of NH 2 -MIL-88B(Fe)/CDs@GO membrane can reach 95%, and the antifouling performance is excellent. In this study, the composite photocatalytic membrane shows excellent stability, photocatalytic performance and self-cleaning property, which is conducive to widening the application prospect of wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2022
·Vol. 4
·期 9
·2171-2179
·
IF 5.598
Dawei Xu,Xuhui Li,Tingting Zheng,Ruixue Zhao,Pengyu Zhang,Kai Li,Zhongfeng Li,Lirong Zheng,Xia Zuo
Here, a series of Fe/N/C catalysts with different proportions and pyrolysis temperatures are prepared by co-pyrolysis of melamine with a γ-cyclodextrin metal–organic framework (γ-CD-MOF) containing iron(II) phthalocyanine (FePc). Due to the restriction effect of the host and guest at the molecular level, γ-CD-MOF can effectively avoid the π–π stacking of FePc and restrain the agglomeration of Fe atoms during pyrolysis. The phases and structures of the catalysts are characterized, which proves that the obtained catalyst has a three-dimensional porous and internal cavity structure with abundant surface area (1055.317 m2 g−1) and Fe is atomically dispersed in nitrogen-doped carbon. The onset potential (0.988 V vs. RHE) and half-wave potential (0.846 V vs. RHE) of FePc@CD/M (1 : 20)-1000 are superior to those of a commercial 20% Pt/C catalyst. FePc@CD/M (1 : 20)-1000 also exhibits an approximately four-electron (3.84) transfer process, good stability and excellent methanol tolerance.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 1
·e202204011
·
IF 2.1
Chuan Chen,Tianhao Yao,Sen Qian,Qiang Zhang,Ximin Zhang
Graphical A series of Ni x Zn 1−x Fe 2 O 4 (x=0, 0.25, 0.5, 0.75 and 1) sponges have been fabricated through a facile blowing-combustion method. The optimized Ni 0.75 Zn 0.25 Fe 2 O 4 sponge showed pure phase of spinel ferrite and displayed enhanced magnetic satuaratiuon of 44.98 emu/g. Spinel ferrites have been widely used in various fields, among which nickel-zinc (NiZn) ferrites have drawn much attention due to their high electrical resistivity as well as low eddy current loss. To accommodate highly-integrated modern electronic devices, the preparation methods for nano/micro-sized NiZn ferrites have been widely discussed. Nevertheless, these current synthesis routes are usually cost/time-consuming, which hinders their large-scale production for practical applications. Herein, we present a facile, low-cost synthesis strategy for NiZn ferrites (Ni x Zn 1−x Fe 2 O 4 , x=0, 0.25, 0.5, 0.75 and 1) through a blowing-combustion method. The effect of Ni/Zn molar concentration on the structure, morphology as well as magnetic properties has been thoroughly investigated through X-ray diffraction, Raman spectroscopy, scanning electron microscopy and vibrating sample magnetometer. Thanks to the synergetic effect of the pure phase and moderate Ni molar concentration, the Ni 0.75 Zn 0.25 Fe 2 O 4 shows an enhanced saturation magnetization of 44.98 emu/g. More importantly, this blowing-combustion method may also be commonly applied to other spinel ferrites with different stoichiometric ratios and heteroatom doping.
研究领域:
材料科学
·
纳米技术
·
磁学
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Zhao Sun,Tingwei Wang,Rongjun Zhang,Hongwei Li,Yu Wu,Sam Toan,Zhiqiang Sun
Gasification is one of the most promising approaches to accomplishing efficient utilization of biomass, nevertheless, it shows severe problems of low efficiency and syngas quality, which deserves further improvements. In this regard, deoxygenation-sorption-enhanced biomass gasification is proposed and experimentally explored using deoxidizer-decarbonizer materials ( x CaO-Fe) for intensified hydrogen production . The materials follow the deoxygenated looping of Fe 0 -3e − ↔Fe 3+ as an electron donor and the decarbonized looping of CaO + CO 2 ↔ CaCO 3 as a CO 2 sorbent. Specifically, the H 2 yield and CO 2 concentration reach 7.9 mmol·g −1 biomass and 10.5 vol%, which increases by 311% and decreases by 75%, respectively, compared with conventional gasification, confirming the promotion effect of deoxygenation-sorption enhancement. Fe embedded within the CaO phase is successfully constructed with the formation of functionalized interface structure, affirming the strong interaction between CaO and Fe. This study brings in a new concept for biomass utilization via synergistic deoxygenation and decarbonization, which will substantially boost high-quality renewable hydrogen production .
研究领域:
能源与环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 3
·1-10
·
IF 5.3
Miao Pandeng,Chen Jiaquan,Xu Guangfu,Yu Tao,Du Yingxiang
Chiral phenyl aromatic compounds (CPACs) are widely used in drug development, food/cosmetic production, and other organic synthesis processes, and their different enantiomers have distinct physiological activities and application differences. A double-layer metal–organic framework composite (MOF-on-MOF) was obtained by in situ synthesis of chiral metal–organic framework (CMOM-3S) on the surface of an iron-based metal–organic framework (NH 2 -MIL-101(Fe)). According to our investigation, MOF-on-MOF composite was for the first time applied to the stationary phase of capillary electrochromatography (CEC), and enantioseparations of eight CPACs were accomplished. Compared with single CMOM-3S, the enantioseparation performance of the coated capillary columns based on NH 2 -MIL-101(Fe)@CMOM-3S was improved by 34.07 ~ 720.0%. The R-/S-mandelic acid in actual sample (apricot leaves) was detected by the newly CEC system to be 0.0118 mg mL −1 and 0.0523 mg mL −1 , respectively. The spike recoveries were 96.60 ~ 104.7%, indicating its good stability and accuracy. In addition, the selective adsorption capacity of MOF-on-MOF composites was verified by adsorption experiments. Graphical Abstract
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shi-Wen Lv,Qiuyu Zheng,Lingjie Ye,Chun-Yang Li,Jing-Min Liu,Yanqing Cong,Shuo Wang
Nowadays, simultaneous removal of organic pollutants and heavy metals from wastewater is still a complicated task with great challenge. Herein, a newly-designed Fe-g-C 3 N 4 /α-Fe 2 O 3 composite with an active N-Fe-O bridge was prepared by coupling Fe-doped g-C 3 N 4 (namely Fe-g-C 3 N 4 ) and α-Fe 2 O 3 . Interestingly, the combination of Fe-g-C 3 N 4 with α-Fe 2 O 3 broadened the light absorption region and restrained the photoinduced electron-hole pair recombination. Meanwhile, elaborate construction of N-Fe-O bridges based on coordination interaction can reduce electrochemical impedance and facilitate electron transfer, thereby prolonging the charge lifetime. As expected, the Fe-g-C 3 N 4 /α-Fe 2 O 3 composite displayed excellent photocatalytic performance in simultaneous removal of tetracycline (TC) and Cr(VI). More importantly, Fe-g-C 3 N 4 /α-Fe 2 O 3 -mediated electron transfer from TC to Cr(VI) also played an essential role on TC oxidation and Cr(VI) reduction under visible light. Both experimental analyses and theoretical calculations revealed that the migration route of photogenerated carriers followed a direct Z-scheme heterojunction mechanism under built-in electric field. The Fe-g-C 3 N 4 /α-Fe 2 O 3 composite with great stability also displayed promising practical application potential. In short, the current work not only provided a highly-efficient photocatalyst with N-Fe-O bridges but also shared new insights into the simultaneous removal of organic pollutants and heavy metals.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Min Jiang,Xiangyu Wang,Renchan Han,Ping Ning,Iseult Lynch,Jun Ma
A S-scheme Fe/Fe 2 O 3 @CBO photocatalyst was synthesized via a grinding calcination method, proficiently degrading tetracycline via radicals and non-radical. The reaction rate of Fe/Fe 2 O 3 @CBO-20 was recovered to 0.0255 min −1 that is 4.3 and 7.3 times as many as pristine Fe/Fe 2 O 3 and CBO after introducing visible light at the degradation process. The characterization outcomes also bear out that the S-scheme heterojunction is formed by passivation layer Fe 2 O 3 and CBO, which enhances the visible light responsiveness of catalyst and promotes the separation and transfer of photogenerated electrons to generate h + and O 2 − . Meanwhile, the molecular oxygen is more easily activated to form H 2 O 2 due to the strong reduction potential of the CB (−1.21 eV), further to facilitate the transformation of O 2 − to 1 O 2 . And the carriers excited in CBO activate Cu + , forming a Cu/Fe dual-metal electron cycle. The generated Fe 2+ reacts with H 2 O 2 to establish photocatalysis-self-Fenton system to generate ·OH. Additionally, the high TC removal in simulated aquatic environment exhibit that the catalytic performance is slightly affected by practical wastewater and the cyclic experiment show the stability and practicality. In conclusion, innovatively employing Fe/Fe 2 O 3 for pollutant degradation via photocatalytic technology, this research paves a promising and efficacious pathway for the application of Fe/Fe 2 O 3 .
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2025
·
IF 8.1
Qianying Zong,Xiaofei Niu,Xin Cheng,Yifan Liu,Cong Liu,Tingyue Shi,Jiapeng Liu,Xiaohong Yang,Wentao Wang,Zikuan Guo,Fengjuan Xiao
Nanoscale FeWO 4 /BiVO 4 heterojunctions were directly grown on the graphite fiber felt (GF) with good conductivity to construct a FeWO 4 /BiVO 4 @GF solar photo-Fenton like wastewater treatment system. The removal effect of COD from phenolic wastewater and the mechanism of synergistic improvement of wastewater treatment efficiency by this system were investigated. The FeWO 4 /BiVO 4 heterojunction prepared by hydrothermal method exhibited higher photoelectric conversion efficiency and solar light utilization rate, thus endowing FeWO 4 /BiVO 4 with excellent solar-Fenton like reaction activity.The photo-Fenton activity can be maintained well even within the pH range of 2–8. Loading FeWO 4 /BiVO 4 nano-heterojunction on GF helped to increase the contact area between Fenton reagents and wastewater, facilitate the electron transfer on the FeWO 4 /BiVO 4 heterojunction and enable the recovery and reuse of the Fenton reagents.Under solar light radiation, the COD removal efficiency of FeWO 4 /BiVO 4 @GF/H 2 O 2 system in phenolic wastewater was more than 92%. Even after five cycles, the system still exhibited excellent operation stability. FeWO 4 /BiVO 4 @GF promoted the conversion and cycling of Fe(III)/Fe(II) by accelerating the separation and transport of photogenerated electrons/holes and increasing the concentration of active species, thereby stimulating excellent solar photo-Fenton like activity.The results are significance to the development of green and efficient photo-Fenton process for advanced treatment of industrial wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 45
·20881-20889
·
IF 3.3
Zairan Liu,Yifei Yang,Jiaoning Tang,Yuanming Deng
Here we report a simple topochemical method to prepare Ni–Fe layered double hydroxide (LDH). Ni(II)Fe(II) hydroxide was prepared via coprecipitation of Ni2+ and Fe2+ by NH4HCO3 under anaerobic conditions at room temperature. Ni–Fe LDH was obtained via oxidation intercalation by exposing the precipitate to air. The structure of the LDH was characterized and the performance in the electrochemical oxygen elution reaction (OER) was determined. Residual Fe(II) was observed by XPS due to incomplete oxidation, resulting in Fe replacing the Ni site in the LDH. It is found that LDH embedded with both Fe–O–Fe and Ni–O–Fe moieties is beneficial to the OER in terms of a low overpotential (240 mV at 10 mA cm−2), small Tafel slope (25 mV dec−1) and high electrochemical stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Hongbin Wang,Jiewen Deng,Xiaohui Lu,Li Wan,Jin Huang,Yiqing Liu
The improvement on diclofenac (DCF) degradation by Fe(II)-activated persulfate (PS) combined with bisulfite (BS) was investigated. It was observed that the introduction of BS in Fe(II)/PS process enhanced the circulation of Fe(III/II) and kept Fe(II) at a high concentration, resulting a rapid and continuous DCF degradation. The initial pH, reagent dosages and reaction temperature played important roles on DCF removal in BS/Fe(II)/PS process. The main iron species in this system were FeHSO 3 + , Fe 2+ and FeOHSO 3 H + , and their variation trends were calculated by the software of MINITEQ 3.1. Based on the alcohols quenching experiments, SO 4 − was confirmed to be the prominent reactive radical for DCF oxidation in BS/Fe(II)/PS process. Moreover, the probable DCF degradation mechanism was proposed based on the detected intermediate products and density functional theory (DFT) calculation. The BS/Fe(II)/PS system presented a synergistic effect for rapid and steady DCF degradation through the occurred cycle of Fe(II/III) (i.e., oxidation of Fe(II) by PS and then reduction of Fe(III) by BS) and solved the drawbacks of slow initial reaction of Fe(II)/BS and weak durability of Fe(II)/PS. This study could provide an effective and environmentally friendly approach to sewage treatment.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 46
·24598-24607
·
IF 11.301
Chizhong Wang,Rong Wang,Yue Peng,Jianjun Chen,Zhen Chen,Haibo Yin,Junhua Li
Development of new groups of oxygen evolution reaction (OER) electrocatalysts based on transitional metal materials is highly attractive for renewable energy conversion and storage. Here we report a new FeNb (oxy)hydroxide catalyst, which delivered a high OER activity with an overpotential as low as 0.34 V (at 10 mA cm−2). To attain a homogeneous mixing of metal components, niobium was initially incorporated into the framework of iron oxalate dihydrate. The mixed oxalate could be structurally transformed into short-range ordered (oxy)hydroxide, the reactive species for the OER. Incorporation of Nb has been demonstrated to improve the intrinsic OER activity based on Fe species and to accelerate the charge-transfer kinetics across the solid-electrolyte interface. It is also found that strong Fe–Nb interaction can induce the formation of high-valent Fe species. Theoretical calculation results further illustrate the role of NbOx in the OER mechanism, in which Fe serves as the active site and the Nb species can promote the conversion of *OH to *O intermediates to reduce the OER overpotential.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiang Li,Xiaoge Chen,Bo Wang,Gang Yu
The development of engineered nanomaterials has aroused great attention in controlling the existence of toxic micropollutants. However, their performance in complex environmental matrices is frequently neglected. Highly efficient enrichment coupled with synergistic degradation with low concentrations is challenging but significant in practical industrial applications. In this study, a large group of active pharmaceutical compounds (PACs) at environmentally relevant concentrations ∼ μg/L were rapidly extracted in core-shell MIL-100 (Fe), followed by effective degradation during the visible-light photo-Fenton process in situ. Unexpectedly, in natural secondary wastewater, adsorption capacities were inhibited (2–50 % decreased after 60 min), while the degradation kinetics of eight PACs were remarkably promoted (1.42–2.92 times higher). Under neutral pH, the accumulated pharmaceuticals within cages were effectively decomposed by •OH and 1 O 2 , mainly derived from visible-light-induced reduction of Fe (III)-cluster and the generation of ROS. The structural parameters (log K ow ) were closely correlated to the adsorption behavior (R 2 = 0.74), which remarkably facilitated the degradation. The powder was loaded onto the PTFE/ultrafiltration membrane in a flow-through reactor. The targeted PACs were rapidly degraded over the self-cleaning surface under visible light irradiation, implying a promising future for industrial application.
研究领域:
环境科学
·
纳米材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）