CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Bingbing Hu,Chuanlan Xu,Muhammad Kashif Aslam,Yuan Cen,Jiahong Hu,Yan Li,Yuping Liu,Chaozhong Guo,Danmei Yu,Changguo Chen
In this work, multilayer networks lanthanum-doped V 2 O 5 · n H 2 O@OAB (noted as La-VOH@OAB) binder-free thin film positive electrode has been first successfully synthesized via a simple and economical sol-gel and drop-coating methods. Benefiting from its unique architecture and the favorable synergetic contributions for rare earth metal ions of La 3+ and hydrophilic carbon of OAB, after the condition optimization, the 20%La-VOH@OAB-4 exhibits an excellent electrochemical performance with an ultrahigh specific capacitance of 612 F g −1 at a current density of 1 A g −1 , good rate capability (81.1%, the current density increases tenfold) and outstanding cycling stability (90.4% capacitance retention over 2000 cycles). In addition, flexible Fe 2 O 3 @rGO binder-free thin film negative electrode prepared with the similarly facile strategy demonstrates a high specific capacitance of 366 F g −1 due to Fe 2 O 3 nanoparticles tightly anchored on the rGO surface. The assembled 20%La-VOH@OAB-4//Fe 2 O 3 @rGO ASCs device within a voltage window of 1.7 V delivers a relatively high specific energy density of 56.3 Wh kg −1 at a power density of 849.9 W kg −1 with exceptional cycling stability (81.3% capacitance retention after 5000 cycles), moreover, two ASCs devices in parallel can light up a red LED for 3 min, demonstrating its potential in practical applications. This work provides a certain reference for the fabrication of environmentally friendly thin film electrodes for developing high efficient energy storage systems.
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ACS Applied Nano Materials
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2023
·
IF 5.9
Songbo Wang,Yidan Wang,Jia Li,Shuang Guo,Chengzhen Meng,Lun Pan,Ji-Jun Zou,Yawei Shi,Lei Zhang,Zhen Yin,Na Tang
In order to address the current energy and environmental challenges, photoelectrochemical (PEC) water splitting has been widely studied, and the key point about the efficient PEC process is how to develop highly active photoanode catalysts. In this article, we report a two-step hydrothermal and electrodeposition approach to prepare a cobalt (oxy)hydroxide (CoOOH)-modified Ti-Fe2O3-In2O3 electrode by synergy of electron modulation and a heterojunction structure for promoting PEC water splitting. Under a bias of 1.23 V vs RHE, the optimized Ti-Fe2O3-In2O3/CoOOH photoanode demonstrated remarkable photocurrent density and hydrogen evolution rate as high as 1.33 mA cm–2 and 22.8 μmol cm–2 h–1, which was 5.11-fold and 5.14-fold that of bare α-Fe2O3, respectively. Characterization results indicate that Ti-doping will alter the electronic structure and improve the charge carrier density, whereas the construction of a heterojunction can realize the spatial separation of charge carriers. Meanwhile, the outer CoOOH ultrathin layer can provide a large amount of oxygen evolution reaction sites and promote the surface reaction. This work suggests that the PEC performance of Fe2O3-based photoanodes can be improved effectively by the synergy of electronic modulation and heterojunction construction.
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CHEMOSPHERE
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2023
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IF 8.8
Yuanqing Guo,Quan Liu,Xiaobin Tang,Heng Liang,Guibai Li,Liwei Yang,Lu Wang,Xiaoling Li,Yan Sun
A photocatalytic membrane coated with α-Fe 2 O 3 /Fe 3 O 4 nanoparticles has been developed to address the challenges of membrane fouling and organic removal in the treatment of natural surface water. The photocatalytic and filtration properties of the membranes were investigated through a variety of methods. The successful preparation of iron oxide was confirmed by UV–vis diffuse reflectance spectra and X-ray diffractometry, with α-Fe 2 O 3 identified as the primary photocatalytic agent. A commercial ultrafiltration (UF) membrane was employed as a comparison to evaluate the photocatalytic performance and filtration properties of the modified membrane. Results showed that the photocatalytic membrane achieved better removal rates for UV 254 (22.0%) and specific fluorescent organic compounds, such as component 2 (19.38%) and component 3 (16.89%), compared to the control group. Furthermore, both irreversible and reversible fouling resistances of the prepared membranes were significantly lower than that of the control group, with reductions of 39.4% and 50.2%, respectively. The membrane coated with α-Fe 2 O 3 /Fe 3 O 4 nanoparticles exhibited moderate removal of protein-like and terrestrially derived humic-like fluorescent organics while controlling membrane fouling. Although the α-Fe 2 O 3 /Fe 3 O 4 nanoparticles-coated photocatalytic membrane demonstrated good anti-fouling properties, the removals of organic matters were not as effective as anticipated due to the shorter hydraulic retention time. This study provides valuable insights for enhancing pollutant degradation and anti-fouling properties of membranes through the utilization of solar photocatalytic α-Fe 2 O 3 /Fe 3 O 4 surface-modified membranes in the treatment of natural surface water.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Junfei Liu,Yue Zhang,Yingbo Dong,Zeyi Jiang,Liping Zhang,Wei Liu,Jing Guan,Hai Lin
In this study, a novel α-Fe 2 O 3 /V 2 O 5 /BC catalyst with high peroxymonosulfate (PMS) activation performance was constructed by co-pyrolysis method and 99.58% of tetracycline is degraded within 120 min. The electrons conversion of Fe-V on biochar surface induces the continuous generation of sulfate radical and singlet oxygen molecules ( 1 O 2 ). The XPS results show that it is Fe 3+ and Fe 0 rather than Fe 3+ and Fe 2+ in the iron cycle after the introduction of vanadium, indicating a more efficient electron transfer efficiency between interface. The optical properties characterization and density function theory calculation (DFT) of α-Fe 2 O 3 /V 2 O 5 /BC reveal that the electrons of the entire α-Fe 2 O 3 and the vanadium atoms are redistributed to new molecular orbitals due to strong interfacial chemical bonding, inducing a direct transfer of electrons to generate 1 O 2 for tetracycline removal that is the main cause of selective degradation. Besides, the possible degradation mechanism and tetracycline degradation pathways were also proposed. The α-Fe 2 O 3 /V 2 O 5 /BC maintains a high removal efficiency of tetracycline only decrease by 7.09% after six cycles. This study provides a better strategy and recyclable purification material for the efficient treatment of antibiotic pharmaceutical wastewater.
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Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Qiang Fu,Yue Meng,Yiyang Yao,Hui Shen,Bo Xie,Zheming Ni,Shengjie Xia
A synergistic strategy of Facet engineering and the construction of Z-scheme heterojunctions is expected to improve internal consumption and insufficient carriers in photocatalysis significantly. In this paper, Fe 2 O 3 nanoparticles were selectively grown on the (110) facet of BiVO 4 , and facet orientation-supported Z-scheme heterojunction of BiVO 4 (110)-Fe 2 O 3 was constructed for the photocatalytic degradation of tetracycline . The effects of catalyst dosage, pH, temperature, and other conditions on the degradation performance were systematically investigated and found to have excellent catalytic activity , structural stability, and reusability. The removal of TC (15 mg·L −1 ) under 60 min visible light irradiation were 57.7%, 81.7%, and 91.5% for single-phase catalyst, non-directionally loaded BiVO 4 -Fe 2 O 3 and directionally loaded BiVO 4 (110)-Fe 2 O 3 Z-scheme heterojunction (0.3 g·L −1 ), respectively. Combining photoelectric testing and DFT calculation, it was confirmed that the presence of the built-in electric field from BiVO 4 (110) pointing to Fe 2 O 3 (110) in BiVO 4 (110)-Fe 2 O 3 Z-scheme heterojunction facilitates the separation and transfer of photogenerated carriers and significantly improves the photodegradation performance of the material. In addition, the intermediates and degradation pathways were investigated in detail.
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ENVIRONMENTAL POLLUTION
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2023
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IF 8.9
Xiangyu Wang,Min Jiang,Iseult Lynch,Zhiling Guo,Peng Zhang,Lisi Wu,Jun Ma
Although Fe/Fe 2 O 3 has potential application compared with nanoscale zero-valent iron (nZVI), its smooth structure largely limits the catalytic performance. To address this challenge, we innovatively constructed highly efficient composite Fe/Fe 2 O 3 @UiO-66 via employing an urchin-like core-shell structure of Fe/Fe 2 O 3 onto UiO-66 through a facile ion exchange precipitation method without inert gas protection. The characterization results show the urchin-like core-shell configuration can extend the life span of Fe 0 and produce more active sites. Besides, the absorption spectrum is broadened by Fe 2 O 3 which has narrow band gap and the high-efficiency separation of photogenerated electron-hole pairs is obtained with the load of Fe/Fe 2 O 3 . Moreover, Two-parameter pseudo-first-order decay model fits well with the reduction and adsorption of composites in the dark reaction, and a plausible pathway for tetracycline (TC) degradation is also proposed. The findings of this research provide a promising method for promoting the catalytic properties of MOF-based materials and Fe/Fe 2 O 3 .
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高影响因子
Catalysts
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2023
·Vol. 13
·期 3
·588
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IF 3.9
Haiou Zhang,Yixin Zhang,Huikang Song,Yan Cui,Yingying Xue,Cai-e Wu,Chao Pan,Jingxin Xu,Jian Qiu,Leilei Xu,Mindong Chen
As a toxic pollutant, carbon monoxide (CO) usually causes harmful effects on human health. Therefore, the thermally catalytic oxidation of CO has received extensive attention in recent years. The CuO-based catalysts have been widely investigated due to their availability. In this study, a series of transition metal oxides (Fe2O3, Co3O4and NiO) promoted CuO-based catalysts supported on the α-MnO2nanowire catalysts were prepared by the deposition precipitation method for catalytic CO oxidation reactions. The effects of the loaded transition metal type, the loading amount, and the calcination temperature on the catalytic performances were systematically investigated. Further catalyst characterization showed that the CuO/α-MnO2catalyst modified with 3 wt% Co3O4and calcined at 400 °C performed the highest CO catalytic activity (T90= 75 °C) among the investigated catalysts. It was supposed that the loading of the Co3O4dopant not only increased the content of oxygen vacancies in the catalyst but also increased the specific surface area and pore volume of the CuO/α-MnO2nanowire catalyst, which would further enhance the catalytic activity. The CuO/α-MnO2catalyst modified with 3 wt% NiO and calcined at 400 °C exhibited the highest surface adsorbed oxygen content and the best normalized reaction rate, but the specific surface area limited its activity. Therefore, the appropriate loading of the Co3O4modifier could greatly enhance the activity of CuO/α-MnO2. This research could provide a reference method for constructing efficient low-temperature CO oxidation catalysts.Keywords:transition metal oxides;CuO-based catalysts;Co3O4modification;α-MnO2nanowire;catalytic oxidation of CO
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ACS ES&T Engineering
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2023
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IF 7.1
Wei-Ping Zhu,Jie Deng,Zhi-Jie Chen,Jia-Cheng Li,Juan Xu
The performance of three-dimensional biofilm electrode reactors (3D-BERs) in hydrogen autotrophic denitrification is determined by electroactive biofilms. Herein, a self-assembled hybrid biofilm (SAHB) is developed on granular activated carbon particle electrodes by incorporating nano α-Fe2O3. The influences of operating parameters such as current, influent concentration, and hydraulic retention time (HRT) on denitrification are investigated as well as the mechanisms of SAHB-improved denitrification. The results indicate that SAHB achieves a high autotrophic denitrification rate of 4.20 mg TN/L/h under 40 mA current, 100 mg/L nitrate, and 26 h HRT, outperforming the naturally formed biofilm by 23.53%. SAHB contains more microorganisms than naturally formed biofilms, revealing that nano α-Fe2O3 is conducive to trapping free microorganisms on particle electrodes. SAHB enriches denitrification-related genes and increases corresponding enzyme activities (particularly nitrite reductase). According to metagenomic sequencing, nano α-Fe2O3 addition at a current level of 40 mA appears to favor denitrification via the nirS-dependent pathway probably due to its high affinity for cytochrome C. Metagenomic binning reveals that the microorganism associated with Zoogloeaceae (Rhodocyclales order) in SAHB may play a pivotal role in hydrogen autotrophic denitrification. This work develops a novel denitrification system, furthering our understanding of hydrogen autotrophic denitrification in 3D-BERs.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Jun Wu,Ye Wang,Song Zhang,Yuxiang Liu,Feng Wang
Photocatalytic conversion of benzyl alcohol (BA) into value-added fine chemicals and hydrogen (H 2 ) in water medium provides a novel strategy for green synthesis. The construction of Z-scheme heterostructures not only realize enhanced charge-separation efficiency, but also remain strong drive force for photocatalytic reaction, which exhibit great potentials toward simultaneously generating benzaldehyde (BAD) and H 2 . Herein, we report a noble-metal-free Z-scheme photocatalytic system consisting poly(dibenzothiophene-S,S-dioxide) (PSO) and α-Fe 2 O 3 for selective oxidation of BA with synchronous H 2 production. Such nanocomposites can effectively transfer and reduce the recombination of photoexcited charge carriers, therefore maintaining the oxidizability of holes of α-Fe 2 O 3 and the reducibility of electrons of PSO. As expected, PSO-Fe 2 O 3 with a mass of ∼5 mg under optimal composition ratio exhibited an impressive photocatalytic activity with BAD and H 2 yields up to 23.1 and 29.5 μmol h −1 , respectively, which is among the top photocatalytic performance reported so far for selective photocatalytic oxidation of BA in the aqueous solution.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 25
·期 9
·2330-2336
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IF 5.16
Jing Liu,Xiuxia Zhao,Peng Jing,Wei Shi,Peng Cheng
Graphical Green hybrid : A Z-Scheme system, g-C 3 N 4 /α-Fe 2 O 3 , was synthesized by a MOF-derived template method. The optimized system shows excellent photocatalytic hydrogen evolution performance with visible light response. As one of the most efficient systems for photocatalytic hydrogen evolution, the Z-Scheme system, consisting of different semiconductors with a reversible donor–acceptor pair, has attracted great attention. Considering the non-toxicity and low cost of photocatalysts, a series of g-C 3 N 4 /α-Fe 2 O 3 hybrids were rationally constructed based on the Z-Scheme mechanism for the first time, using a metal-organic framework template approach that can fine tune the compositions and properties of the hybrids. An optimized hybrid, g-C 3 N 4 /α-Fe 2 O 3 -2, exhibited prominent photocatalytic water splitting performance with a visible light response. Under irradiation of visible light ( λ >420 nm), the hybrid shows a high durability and superior hydrogen production rate of 2066.2 μmol g −1 h −1 from water splitting, which is approximately three times greater than that of bulk g-C 3 N 4 because of the effective separation of photo-excited charge carriers by two narrow band gap semiconductors, tightly coupled with the Z-Scheme structural feature.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Nan Wang,Bin Han,Jianbo Wen,Mingwei Liu,Xinjun Li
A novel Mn-doped Fe 2 O 3 modified g-C 3 N 4 nanosheets composite has been prepared for overall water splitting. Structure characterizations reveal that the Mn are successfully doped in the Fe 2 O 3 nanoparticle and a close interface between g-C 3 N 4 and Mn-doped Fe 2 O 3 is obtained. The optimized FMC-10 photocatalyst has a H 2 evolution of 51 μmol h −1 . The improved photocatalytic performance can be ascribed to the synergy effect of both Mn-doped Fe 2 O 3 and g-C 3 N 4 . Doping Fe 2 O 3 with Mn promotes photo-induced charges and increases the charge transfer for the improved conductivity of the bulk Fe 2 O 3 , while favorable contacting with g-C 3 N 4 enhances the charge separation ability.
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MATERIALS RESEARCH BULLETIN
·
2017
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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.
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