Molecular Catalysis
·
2023
·
IF 4.6
Yuxi Qin,Adeel Ahmed,Shahid Iqbal,Muhammad Usman
In the current research study, β-cyclodextrin modified Fe 3 O 4 (β-CD@Fe 3 O 4 ) superparamagnetic composite materials were synthesized using co-precipitation and ultrasonication methods, with β-CD acting as a coating material. The as-prepared material was employed as a heterogeneous catalyst for the activation of peroxymonosulfate (PMS) for the removal of norfloxacin (NOR). The catalytic activities of bare Fe 3 O 4 , β-CD@Fe 3 O 4 composites, and the β-CD@Fe 3 O 4 /PMS system were compared under various parameters. Results revealed that the β-CD@Fe 3 O 4 /PMS exhibited higher catalytic activities, and a removal efficiency of 99.12% with a rate constant of 0.1576 min −1 was achieved in 30 min under optimum conditions ([catalyst] = 0.4 g/L, [PMS] = 4.0 mM, [NOR] = 30 mg/L, pH = 7.0). In particular, the larger surface area of β-CD@Fe 3 O 4 (120 m 2 g −1 ) and the presence of additional reactive sites accelerated the activation of PMS in comparison to bare Fe 3 O 4 (70 m 2 g −1 ) and thereby promoted the mineralization of NOR. The impact of various pivotal factors on NOR abatement was also studied. Scavenging results and the EPR technique revealed that the SO 4 •− , • OH, and O 2 •− radicals participated in the removal of NOR in the β-CD@Fe 3 O 4 /PMS system. The Fe 3+ /Fe 2+ /Fe 3+ redox cycle in β-CD@Fe 3 O 4 is used for the activation of PMS and generates radicles. The reusability results show excellent stability of the catalyst material, and a loss of 4.35% was observed after four cycles. The results revealed that the β-CD@Fe 3 O 4 composites can activate PMS and have potential for the degradation of various pollutants from the environment.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yanhua Lei,Mengchao Ding,Sha Cheng,Da Huo,Fei Zhang,Tao Liu,Yuliang Zhang
The transition metal sulfide MoS 2 has attracted great interest from the scientific community as an excellent co-catalyst for promoting Fe 2+ /Fe 3+ cycling in advanced oxidation processes to enhance the efficiency of H 2 O 2 decomposition. A photothermal-enhanced photo-Fenton pollutant degradation strategy was proposed. Hybrids of magnetically recyclable Fe 3 O 4 fabricated 1 T-2 H MoS 2 (1 T-2 H MoS 2 @Fe 3 O 4 ) with excellent photothermal conversion efficiency were fabricated to overcome the limitations of relatively low catalytic activity and cycling stability in Fenton reaction. XRD , Raman, TEM and hysteresis loop were employed to evaluate the heterogeneous phase 1 T-2 H MoS 2 nanoflowers as well as the magnetic property . The 1 T-2 H MoS 2 @Fe 3 O 4 hybrids with excellent photothermal conversion efficiency not only enhance the reaction temperature of the Fenton reaction occurring on the material surface, but also demonstrate an effective interfacial photothermal water evaporation efficiency. Due to the synergistic effect of photocatalysis and photo-Fenton catalytic reaction , a quick degradation of simulated pollution were achieved in 5 mins with 98.3% degradation, which could be further improved to 99% due to the photothermal promoting reaction. The 1 T-2 H MoS 2 @Fe 3 O 4 hybrids exhibit good magnetic recyclability, cyclic stability and photothermal performance, which endow it a wide potential application in the field of environmental remediation and the field of water evaporation at the photothermal interface, etc.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Miaomiao Sun,Yuzeng Zhao,Honghua Ge
Using conductive carbon black (CCB) as a carrier, a heterogeneous catalyst with Fe 3 O 4 as the active material (Fe 3 O 4 /CCB) was prepared by the impregnation method, and its performance in degrading of high-concentration methyl orange (MO) wastewater in the three-dimensional electro-Fenton system (3DEF) was explored. Characterization by TEM and XRD showed that Fe 3 O 4 was uniformly loaded on CCB, and due to the synergistic effect of Fe 3 O 4 and CCB in promoting degradation of pollutants, the degradation rate of this catalyst was 2.14 times higher than that of Fe 3 O 4 alone. Under the optimal conditions, the COD removal rate and MO decolorization rate reached the maximum, values of 75.02% and 93.75%, respectively. After 5 cycles, the MO degradation rate was still 83.83%, indicating that the prepared particle electrode has good reusability. In addition, a reasonable catalytic mechanism of the 3DEF system for MO mineralization was proposed, confirming that the hydroxyl radicals were particularly important in the oxidation.
✓ 已验证
产品关联
DOI
高影响因子
Methods and Applications in Fluorescence
·
2023
·Vol. 11
·期 3
·035001
·
IF 3.2
Shiqi Guo,Yilin Chai,Yongjun Wu,Hongchao Guo,Fei Yu,Li-e Liu,Leiliang He,Songcheng Yu,Yongmei Tian,Jia Wang,Ruiying Yang,Ningge Jian,Yilin Wang
In recent years, tetracyclines (TCs) is a hot research topic. Herein, we report an interesting discovery using the complexation of oxytetracycline and metal ions. In this study, according to the properties of Fe3O4 nanoparticles (Fe3O4 NPs) as a nanoenzyme, it can be used to catalyze the oxidation of KI by H2O2 to produce while at the same time binds to rhodamine 6G (Rh6G) to form a conjoined particle (Rh6G ∼ I3)n, leading to a decrease in the fluorescence intensity of Rh6G. However, in the presence of TCs, Fe3O4 NPs have a synergistic effect with TCs, leading to enhanced catalytic activity, as well as better selectivity compared to the activity of other reducing enzymes. Consequently,the fluorescent signal based on a resonance scattering effect between Rh6G and is dependent on the concentration of TCs, thus achieving highly facile and robust detection of TCs. The limits of detection (LOD) of the method were 20 nM, 10 nM and 40 nM for oxytetracycline(OTC), tetracycline(TC) and chlortetracycline(CTC), respectively. Most importantly, the method can be successfully applied to the detection of TCs in milk, eggs, and honey. The recoveries of spiked samples ranged from 83.11 to 118.95%. Thus, a stable, hands-on strategy for the detection of TCs is proposed, which has potential applications in the field of food safety and environmental protection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Jiayi Li,Weixing Han,Heyao Liu,Minhua Su,Diyun Chen,Gang Song
The development and use of clean energy produced by nuclear power plants is becoming a major international trend, but it will inevitably lead to the problem of radionuclide pollution. Radioactive nuclear wastewater containing Cs and U and produced as a byproduct of coastal nuclear power production can cause substantial environmental pollution . In order to simultaneously remove radioactive cesium and uranium, polydopamine (PDA) inlaid ammonium phosphomolybdate (AMP) has established a hydrophilic functional structural film on the surface of Fe 3 O 4 , forming AMP@PDA@Fe 3 O 4 (APF) which is used to simultaneous remove Cs(I) and U(VI). Using the pH sensitive range of APF adsorption in the process of adsorbing Cs(I) and U(VI), synergistic adsorption can be achieved under the condition of weak acidity to neutral. The effects of temperature, and common cations on Cs(I) and U(VI) adsorption by APF were investigated, the adsorption was found to be sensitive to the presence of K + . The efficiency of Cs(I) and U(VI) adsorption by APF was 99.88% and 98.39%, respectively. The Cs(I) adsorption process was primarily ion exchange with NH 4 + within APF composite, whereas that for U(VI) was primarily C-O complexation. Both the Cs(I) and U(VI) adsorption reactions were consistent with second-order kinetic and Langmuir isothermal adsorption models. After five cycles of experiments the removal efficiency of Cs(I) and U(VI) can reach 64.88% and 79.81%, respectively. APF was also found to have high selectivity for Cs and U in seawater with high salt content at pH 6.0–7.0. In mimic contaminated seawater, the efficiency of Cs(I) and U(VI) removal was 97.65% and 84.63%, respectively. These findings provide references for the remove of Cs(I) and U(VI) from radioactive wastewater , making the process of energy production safer.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 18
·8255-8269
·
IF 6.7
Huanhuan Wang,Qi Qu,Jiangshan Gao,Yan He
Herein, Fe3O4@MnO2@Ni–Co/C composites derived from PBAs were successfully fabricated. Firstly, Ni–Co Prussian blue analogues (Ni–Co PBAs) were used as precursors to derive a carbon layer on their surface by annealing treatment and subsequently translated into MnO2@Ni–Co/C nanocubes after hydrothermal reactions. Fe3O4@MnO2@Ni–Co/C composites were finally obtained after depositing Fe3O4 nanoparticles through the annealing process. Their electromagnetic wave (EMW) absorption performance apparently enhanced, thanks to the excellent impedance matching and strong attenuation derived from the synergy between the dielectric loss and the magnetic loss. In particular, the minimum reflection loss (RLmin) of Fe3O4@MnO2@Ni–Co/C reached −41.2 dB with a thickness of 4.0 mm and the effective absorption bandwidth (EAB) reached 7.1 GHz with a thickness of 2.0 mm. Therefore, the results could be significant for synthesizing EMW absorbers with excellent performance, a broad bandwidth, strong absorption, thin thickness and light weight.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Baichun Wang,Kai Yang,Bohan Cai,Jintai Zhang,Chuyun Wei,Aijiao Zhou
Solar water purification is a promising scheme to relieve the energy crisis and clean water shortages. In order to improve the efficiency of producing water, it is necessary to develop a novel photothermal conversion interface to manage heat loss and boost water evaporation efficiency. Herein, a Janus hydrogel evaporator of powder active carbon (PAC) and Fe 3 O 4 in polyvinyl alcohol (PVA) and polystyrene sulfonate (PSS) cross-link hydrogel, called CFPS, is explored as the light absorber for broadband light absorption and formed a hydrogel network of the multi-hydrophilic group. Its hydrophilic/hydrophobic structure of CFPS is used to regulate heat loss and promote water transport, which can attain lower evaporation enthalpy and a higher evaporation rate . Specifically, the surface temperature of the CFPS can reach around 45 °C and 93.4% energy utilization efficiency under 1 sun illumination. In the comparison of the analogous Fe 3 O 4 -based evaporator, CFPS has the higher static evaporation rate with 3.43 kg m –2 h −1 . Besides, it has great mechanical properties, durability and anti-crystallization function, which can be adapted to the water purification scene of wastewater and hypersaline water desalination. This photosensitive magnetic hydrogel evaporator shows potential in the scenarios of wastewater purification and desalination.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Fang Chengqian,Liu Wanbing,Dai Yimin,Wang Zhiheng,Li Yaqi,Cai Ling,Liu Bo,Yang Siwen,Wang Junlong,Ding Xianglong,Zhang Yue-Fei,Li Yan,Wan Li
A novel magnetic hierarchically pillared Sep@Fe 3 O 4 /ZnAl-LDH composite was successfully synthesized via co-precipitation methods. The prepared Sep@Fe 3 O 4 /ZnAl-LDH composite were characterized via FTIR, XRD , XPS , SEM, TEM , BET and VSM . The results show that the Sep@Fe 3 O 4 /ZnAl-LDH composite have a hierarchical columnar structure with nanoscale structural unit (Fe 3 O 4 /ZnAl-LDH) and overall micron-scale morphology, and the obtained graded adsorbent has a large pore capacity and pore size distribution . The maximum adsorption capacities of the obtained samples for methyl orange ( MO) and Congo red ( CR) were 430 mg·g −1 and 832 mg·g −1 , respectively. Kinetic data of MO and CR adsorbed on as-prepared samples can well fit with pseudo-second-order model. The isothermal data of MO and CR adsorbed on Sep@Fe 3 O 4 /ZnAl-LDH match well with the Langmuir model. The thermodynamic results indicate that the adsorption process is spontaneous and endothermic. Besides, the adsorbent shows good stability and reproducibility in a reusable cycle. This study demonstrated that Sep@Fe 3 O 4 /ZnAl-LDH provides a new idea for the development of a novel hierarchical magnetic pillared adsorbent for the efficient removal of anionic dyes.
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2019
·Vol. 6
·期 3
·937-947
·
IF 7.704
Feng Liu,Weifang Zhang,Le Tao,Boyuan Hao,Jing Zhang
The coexistence of multiple-component contaminants, such as Cr(VI) and As(III) in acid mine drainage, brings more difficulties in the wastewater treatment. This study developed a novel strategy for simultaneous redox conversion and removal of Cr(VI) and As(III) in solution. By employing iron oxide encapsulated in a hydrothermal carbon sphere (HCS@Fe3O4), the synergistic photocatalytic reduction of Cr(VI) and oxidation of As(III) were markedly accelerated under simulated solar light irradiation. The transformed Cr(III) and As(V) were readily removed by forming Cr(OH)3 and FeAsO4 precipitates. The Fe(III)/Fe(II) cycle in the system, which was greatly reinforced by photocatalysis in the presence of HCS@Fe3O4, has been demonstrated to be critical in the redox of Cr(VI) and As(III). It can keep sufficient Fe(II) in solution to both directly reduce Cr(VI) and promote the generation of ˙OH for the oxidation of As(III). These findings provide an effectively synergistic conversion and removal strategy for implications in multiple-contaminated water treatment.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Jun Hu,Zhiyong Huang,Jianming Yu
In this study, Fe/Fe 3 O 4 mixture was first applied as an additive to achieve the highly-effective mechanochemical destruction (MCD) of two halogenated organic pollutants (HOPs), hexachloroethane (HCE) and hexachlorobenzene (HCB). The MCD of HCE was more effective than that of HCB in virtue of the lower dissociation energy of C Cl bond. The MCD of HOPs occurred mainly via the reduction by Fe, Fe 3 O 4 and Fe/Fe 3 O 4 . The oxidation of Fe 3 O 4 and reduction of FeO (formed on account of the oxidation of Fe by oxygen-containing species) may also contribute to the HOP destruction. Fe/Fe 3 O 4 mixture exhibited a higher dechlorination rate (DR) than other three effective additives (i.e., Fe/SiO 2 , Al/Al 2 O 3 and Mg/Al 2 O 3 mixture), owing to the electrical property of Fe 3 O 4 and its electron transfer with Fe. The HOP destruction was significantly impacted by the mass fraction of Fe 3 O 4 (MF mag ) and achieved the maximum level with an MF mag of 70%. The DR of HOPs in the atmosphere of air was higher than those of pure oxygen and nitrogen because of the oxygen vacancy in Fe 3 O 4 and oxidation of Fe. The presence of water dramatically inhibited the HOP destruction due to the decrease of collision energy and its competition for the active sites in both Fe and Fe 3 O 4 . As expected, the DR of HOPs increased with rotation speed, and the mass ratio of ball to reactant and additive to pollutant. The analysis of intermediates indicates that HCB destruction was mainly via dechlorination and polymerization, while HCl cleavage also played an important role in HCE destruction. The results demonstrate that Fe/Fe 3 O 4 mixture is a suitable additive for MCD process.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2019
·Vol. 33
·期 5
·e4850
·
IF 3.259
Mingliang Ma,Yuying Yang,Yanyan Liu,Wenting Li,Guopeng Chen,Yong Ma,Ping Lyu,Shunhe Li,Yubao Wang,Guanglei Wu
In this paper, a simple route for palladium (Pd) nanoparticles attached to the surface of hollow magnetic Fe 3 O 4 /P (GMA-DVB)-polyethyleneimine (PEI) microspheres was established. Due to the large amount of imidogen groups and tertiary amine groups presenting in the PEI, Pd 2+ ions could be anchored to the support by complexation with a polyfunctional organic ligand. Thereafter, a magnetic Pd catalyst having a high loading amount and good dispersibility was obtained by reducing Pd 2+ ions. Afterwards, the prepared catalyst was characterized by TEM, SEM, FTIR, XRD, TGA, VSM, and UV–vis in detail. Ultimately, their catalytic activity was evaluated using the reduction of 4-nitrophenol (4-NP). Research showed that the Fe 3 O 4 /P (GMA-DVB)-PEI/Pd catalyst possessed high catalytic performances for the reduction of 4-NP with a conversion rate of 98.43% within 540 s. Furthermore, the catalyst could be easily recovered and reused at least for nine successive cycles.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chaoqun Tan,Xu Lu,Xinxin Cui,Xinchi Jian,Zhixian Hu,Yujie Dong,Xiaoyu Liu,Juan Huang,Ling Deng
An easily recyclable nanocomposite ascorbic acid-modified Fe 3 O 4 (VC@Fe 3 O 4 ) was synthesized, characterized, and evaluated as a green heterogeneous catalyst for activation of peroxymonosulfate (PMS). The structures of fresh and used VC@Fe 3 O 4 were well characterized by TEM, XRD, FTIR, and XPS. The catalytic activity comparison between Fe 3 O 4 and VC@Fe 3 O 4 was performed under different parameters for depletion of sulfadiazine (SD). Additionally, scavenging tests and in-situ electron paramagnetic resonance (EPR) tests were applied to discern the primary radicals generated in the VC@Fe 3 O 4 /PMS system. The results indicate that the VC@Fe 3 O 4 possesses a higher catalytic activity towards PMS compared with Fe 3 O 4 for SD removal, and the observed pseudo first rate constant ( k obs ) were 7.24 × 10 −2 min −1 for the VC@Fe 3 O 4 /PMS system and 1.05 × 10 −2 min −1 for the Fe 3 O 4 /PMS system, correspondingly. 56.6% SD removal efficiency was obtained with 0.3 mM PMS and 0.8 g/L VC@Fe 3 O 4 under pH 7.0. A large amount of hydroxyl radicals (OH ) and a few number of sulfate radicals (SO 4 − ) were discerned by the hyperfine splitting constant values and scavenging results. Mechanisms on the peroxymonosulfate activation and radical generation in the VC@Fe 3 O 4 /PMS system were supposed. Results indicate that VC would obviously boost the cycle of Fe 2+ -Fe 3+ on surface of VC@Fe 3 O 4 nanoparticles and newly generated Fe 2+ can continuously be consumed to activate PMS, which is answer for the rapid generation of reactive radicals (OH , SO 4 − ). At last, mineralization and degradation pathway were also investigated. The findings of this study suggest that VC@Fe 3 O 4 is a novel effective catalyst in activation of peroxymonosulfate under neutral pHs.
✓ 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）