DALTON TRANSACTIONS
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2020
·Vol. 49
·期 27
·9268-9273
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IF 4.174
Lu He,Chuan Tan,Chuanchao Sheng,Yuanzhao Chen,Fengjiao Yu,Yuhui Chen
FeOOH is one of the earth abundant and high-capacity anode materials for lithium-ion batteries (LIBs), but faces problems of inevitable structure collapse and thus poor capacity retention. Herein, we report a composite of β-FeOOH/Ti3C2Tx MXene sandwich by an intercalation of β-FeOOH nanorods within single-layer Ti3C2Tx MXene flakes. After 100 cycles, the β-FeOOH/Ti3C2Tx composite retains a capacity of 937.5 mA h g−1 at 200 mA g−1, and 671.4 mA h g−1 at 1 A g−1. The composite as an anode in LIB delivers improved cyclability and better high-rate performance compared to pristine β-FeOOH, which result from the excellent conductivity of single-layer MXene, facilitating mass transport by the sandwich structure. This work provides a strategy for the design of electrodes, particularly in Na-ion and K-ion batteries, which involve active materials that experience volume change and structural damage during cycling.
研究领域:
材料科学
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能源存储与转换
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2020
·
IF 5.647
Bing Li,Li Zhang,Weizhao Yin,Sihao Lv,Ping Li,Xiangyu Zheng,Jinhua Wu
In this study, nano α-FeOOH (nFeOOH, 100–500 nm) was coated onto activated carbon (nFeOOH@AC) through a dipping means for enhanced Cr(VI) immobilization from drinking water . The nFeOOH@AC significantly improved the Cr(VI) removal from 19.9% (AC control) to 93.4%. XPS spectra and chromium speciation demonstrated that about 90% of adsorbed Cr(VI) was converted to Cr(III) by the nFeOOH@AC, accompanying with a reduction-oxidation of Fe 3+ /Fe 2+ in the nFeOOH matrix due to electrons delivering between AC and surface-bound Cr(VI). The resultant Cr(III) subsequently reacted with Fe(III) to generate stable (Cr χ Fe 1-χ )(OH) 3 precipitates, leading to a much lower Cr(III) release of 7.5% back to solution by the nFeOOH@AC as compared to the AC control of 33.8%, indicating that the nFeOOH@AC had a prospective potential for Cr(VI) immobilization and decreased Cr residue in treated drinking water. Results from column experiment also showed that the nFeOOH@AC afforded a 3.5 times higher capacity for Cr(VI) immobilization and a 3.4 times longer life-span than the pristine AC. Besides, Cr(VI) immobilization by the nFeOOH@AC was a pH-dependent process and the adsorbed Cr on the nFeOOH@AC could be readily desorbed with acetic acid. The disabled nFeOOH@AC could be refreshed by recoating nFeOOH particles with the above dipping method after stripping all the iron oxides with hydrochloric acid . This study demonstrated that nFeOOH coating is an efficient approach to enhance Cr(VI) elimination by AC during drinking water treatments.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Qingqing Chai,Jiahan Dong,Xiaofang Yu,Xiaoke Zhang,Jun Li,Sheng Guo,Yiling Yang
Photocatalytic oxalic acid (OA) activation for pharmaceutical wastewater degradation based on Fe-based catalysts are usually limited by the cycle of Fe 3+ /Fe 2+ and low conversion efficiency of OA. Herein, an effective OA activator, FeOOH loaded FeWO 4 /WO 3 (FFW) heterojunction photocatalyst, were fabricated by electrostatic self-assembly for tetracycline (TC) degradation. Experimental results revealed that the introduction of FeOOH can greatly enhance the optical absorption and separation efficiency of photogenerated carriers of the FeWO 4 /WO 3 (FW) composite. Moreover, optimized FFW heterojunction exhibited the excellent photocatalytic OA activation activity and the highest OA conversion rate for TC degradation, which exhibited 97.3% photocatalytic performance for TC within 30 min under 420 nm light irradiation. The FFW heterojunction still revealed high photocatalytic OA activation activity for TC degradation even after six cycles. The possible degradation pathway of TC and photocatalytic OA activation mechanism of FFW heterojunction were also presented by ESR spectroscopy results, quenching tests, and LC-MS analysis. This work not only provides a fresh perspective on the surface photo-Fenton chemistry of catalytic redox processes, but also presents a valid reference for designing highly efficient photocatalytic OA-activation systems for pharmaceutical wastewater treatment .
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Fangxia Xie,Qing Xi,Mei Zhang,Rui Li,Xiaoming Gao,Houfen Li,Xiaochao Zhang,Yawen Wang,Yunfang Wang,Xiuping Yue,Jianxin Liu,Caimei Fan
Directing the transfer of photoinduced charges to various reaction sites through catalyst design plays crucial roles in enhancing photocatalytic oxygen evolution. Herein, we used a facile alcoholysis method to synthesize amorphous FeOOH modified light-switchable oxygen vacancies BiOBr, which exhibited outstanding photocatalytic oxygen evolution activity. Density functional theory calculations, photoelectronchemical tests and kelvin probe force microscopy revealed that FeOOH overlayer acts as the hole storage layer, while oxygen vacancies (OVs) provided a number of electron trap centers. Benefiting from this synergistic effect, the photogenerated charges showed an outstanding directional transfer performance, which greatly prolong the lifetime of the photo-induced charge carriers. Moreover, as a cocatalyst for water oxidation, FeOOH can effectively lower the kinetics barriers and provide more active sites for oxygen evolution reaction. Therefore, under simulated sunlight irradiation, the 2%FeOOH/BiOBr photocatalyst demonstrated remarkable photocatalytic activity towards oxygen evolution, achieving a rate of 284.34 μmol·g −1 ·h −1 , which is around 1.71 folds than pure BiOBr. Finally, the possible reaction mechanism has also been discussed. This work has provided valuable insights and inspiration for the effective design and optimization of BiOBr-based catalysts, which play a critical role in facilitating efficient directional transfer of photogenerated charges.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Guangwei Zheng,Shukang Jiang,Minghang Cai,Fengqing Zhang,Hongwen Yu
Photoanodes with sufficient visible light absorption, efficient photogenerated carrier separation and fast transport are still the main challenges for realizing high-efficiency photoelectrochemical (PEC) water splitting. Herein, we prepared the WO 3 /FeOOH heterojunction in situ grown on the FTO glass substrates by a facile seed-mediated two-step hydrothermal method . Under simulated sunlight irradiation, the prepared WO 3 /FeOOH heterojunction exhibits the enhanced photocurrent density of 2.63 mA cm −2 at 1.23 V vs. RHE, which is much higher than that of the bare WO 3 film (1.62 mA cm −2 at 1.23 V vs. RHE). The excellent PEC performance of the sample can be attributed to the improved oxygen evolution kinetics and the extended visible light absorption range due to FeOOH, and the facilitation of carrier separation together with the suppressed recombination of photogenerated electron-hole pairs due to the formation of type-II WO 3 /FeOOH heterojunction. This work provides a promising approach for developing a highly efficient and cost-effective photoanode for application in solar-driven PEC water splitting.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yingjing Tian,Siyou Fu,Ping Li,Liying Bin,Bing Tang,Laisheng Li,Guanzheng Zhuang,Yunqiang Yi,Weirui Chen
Photocatalytic ozonation (PCO) process, as an effective water purification technology, was restrained by the low mass transfer and easy combination of photo-carriers ( e cb - - h vb + ) of conventional semiconductor catalysts. To these end, this study synthesized FeOOH quantum-dots (FeOOH QDs) and boosted the PCO activity by its amorphous structure with Ibuprofen (IBP) as model pollutant. 81.5 % IBP was removed by FeOOH QDs PCO, but it was 59.1 % and 61.2 % for α-FeOOH and β-FeOOH PCO, respectively. FeOOH QDs PCO performed well at alkaline environment but was easily inhibited by co-existing ions like SO 4 2- , HCO 3 – , NO 3 – , and Cl - . Compared with those of α-FeOOH and β-FeOOH, FeOOH QDs had the narrowest band gap and the lowest e cb - - h vb + recombination, therefore, its e cb - was more favorable to activate O 3 into •OH. Tetrahedral Fe 3+ and octahedral Fe 3+ co-existed on FeOOH QDs and the tetrahedral Fe 3+ was more conducive to the adsorption of O 3 and contributed to its better PCO activity. •OH was the major reactive oxygen species accounting for IBP degradation. During FeOOH QDs PCO process, 3 degradation routes were proposed basing on 13 kinds by-products. T.E.S.T. result indicated that most of the intermediates were less toxic than IBP. This study is useful for developing catalysts for PCO process.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Chuanqi Li,Hang Su,Kai Zhang,Zhongyi Liu,Hongqiang Wang,Dan Li
Although Fe 2 O 3 is a promising anode material in terms of high capacity, especially, abundance and environmentally friendly, its developments are impeded by the inevitable volume change during electrochemical reactions . Engineering novel nanostructure is an effective approach to maximize the potential in electrochemical properties of Fe 2 O 3 . Herein, urchin-like Fe 2 O 3 @C composite driven from FeOOH has been successfully synthesized by a facile and mild hydrothermal method followed by carbon coating and annealing treatment. Thanks to the synergetic effect by unique structure with rich exposed active sites and high surface area, as well as the complete carbon coating, the Fe 2 O 3 @C composite exhibited excellent rate capability and cycling performance, delivering a significant capacity 267.2 mA h g −1 at a high current density of 5 A g −1 and more than 430 mA h g −1 after 200 cycles at 0.2 A g −1 .
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 14
·3769-3775
·
IF 4.853
Guihua Zeng,Liqiong Hou,Jialing Zhang,Jiaqian Zhu,Xiang Yu,Xionghui Fu,Yi Zhu,Yuanming Zhang
Graphical PEC water splitting : A novel FeOOH/rGO/BiVO 4 photoanode was prepared for the first time with excellent PEC performance in which rGO as a hole-transporting layer significantly enhanced carrier separation efficiencies and FeOOH greatly accelerated the water oxidation kinetics. Bismuth vanadate (BiVO 4 ) is regarded as a potential material in photoelectrochemical (PEC) water splitting, but the photocurrent of BiVO 4 photoanode is much lower than its theoretical value for the high recombination of photo-induced charges and slow water oxidation kinetics. Here, we constructed a FeOOH/rGO/BiVO 4 photoanode, in which rGO could enhance the photogenerated electron-hole separation efficiency by transporting holes and the FeOOH could greatly accelerate the water oxidation kinetics. This novel photoanode displayed excellent PEC performance with the photocurrent density of 3.25 mA cm −2 at 1.23 V vs. RHE, 3.28 times higher than BiVO 4 photoanode (0.99 mA cm −2 ), and long-term stability with the Faraday efficiency of ∼98 % for 3 hours, demonstrating its great potential for PEC water splitting. The photoanode also provided a novel insight into the role of rGO to transport holes rather than electrons in improving the carrier separation efficiency.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Small Methods
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2024
·
IF 10.7
Shiyu Sun,Xiaohui Sui,Haimiao Yu,Ying Zheng,Xiaoting Zhu,Xinyan Wu,Yanqiang Li,Qing Lin,Yongcheng Zhang,Wanneng Ye,Yanna Liang
Tribocatalysis is vitally important for electrochemistry, energy conservation, and water treatment. Exploring eco-friendly and low-cost tribocatalysts with high performance is crucial for practical applications. Here, the highly efficient tribocatalytic performance of FeOOH nanorods is reported. The factors related to the tribocatalytic activity such as nanorod diameter, surface area, and surface roughness are investigated, and the diameter of the FeOOH nanorods is found to have a significant effect on their tribocatalytic performance. As a result, under ultrasonic excitation, the optimized FeOOH nanorods exhibit superior tribocatalytic degradation toward rhodamine B (RhB), acid orange 7, methylene blue, methyl orange dyes, and their mixture. The RhB and mixed dyes are effectively degraded within 20 min ( k = 0.179 min −1 ) and 35 min ( k = 0.089 min −1 ), respectively, with the FeOOH nanorods showing excellent reusability. Moreover, antibiotics, such as tetracycline hydrochloride, phenol, and bisphenol A are efficiently degraded. Investigation of the catalytic mechanism reveals that the friction-generated h + as well as these yielded •OH and •O 2 − active radicals participate in the catalytic reaction. This work not only shed light on the design of high-performance tribocatalyst but also demonstrates that by harvesting mechanical energy, the FeOOH nanorods are promising materials for removing organic contaminants in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yiling He,Siming Yan,Yi He,Jing Yu,Shuangshuang Li,Xianmin Gong,Gou Rui
Graphene oxide (GO) membranes have been extensively studied for the separation and purification of dye wastewater. Improving the stability, permeability and self-cleaning ability of these materials is urgently needed for the purification of complex dye wastewater. In this study, we developed a simple and effective method to insert ternary β-iron hydroxide (β-FeOOH) between GO nanosheets and modify the membrane surface with dopamine hydrochloride (PDA) to solve this problem. The pure water flux of the composite membrane was 9 times higher than that of the pure GO membrane (92.82 L m −2 h −1 ), and the rejection of dye molecules larger than 400 Da was consistently greater than 99 %. The PDA/GO-β-FeOOH 2 composite membrane was operated for 50 h (with xenon lamp irradiation to clean the membrane surface) with a flux of 34.98 L m −2 h −1 and a rejection rate consistently higher than 98.5 %.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Li Zhanyi,Liu Guoguang,Su Qing,Lv Chunyan,Jin Xiaoyu,Wen Xiaoqing
Naproxen (NPX) is one of the most common pharmaceutical and personal care products found in surface water, which is recalcitrant to degradation by biological treatment or complete removal via traditional sewage treatment processes. In this study, nanoscale γ-FeOOH was synthesized and characterized by X-ray diffraction, scanning electron microscopy, surface analysis, and analysis of the forbidden bandwidth. Under UV irradiation, γ-FeOOH had the capacity to rapidly photodegrade NPX. The photodegradation rate of NPX was dependent on the concentration of γ-FeOOH in solution, initial NPX concentration, and pH. By increasing the concentration of γ-FeOOH, the NPX photodegradation rate was increased and then remained stable. Furthermore, the highest photodegradation rate for NPX was observed under acidic conditions. Through the analysis of the active substances (such as h+, e−, OH, 1O2, and O2·-) by electron spin resonance, the photocatalytic mechanism of NPX degradation on γ-FeOOH was determined to be semiconductor photocatalysis.
研究领域:
环境科学
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药学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Guozhen Fang,Xiaowen Ruan,Depeng Meng,Minghua Xu,Chunsheng Ding,Chengxiang Huang,Yu Qiu,Shengli Zhao,Kaikai Ba,Tengfeng Xie,Yong Zhou,Haiyan Zhang,Wei Zhang,Shengye Jin,Jing Leng,Sai Kishore Ravi,Xiaoqiang Cui
The four-electron water oxidation reaction in photoelectrochemical systems poses a major challenge to efficiently converting solar energy into chemical energy amid the global energy crisis. Herein, we report a strategy to develop a photoelectrochemical system using BiVO 4 /Bi 4 V 2 O 10 isometallic heterojunction photoanodes paired with FeOOH/NiOOH cocatalysts to enhance water oxidation in neutral electrolytes. The results demonstrate that the BiVO 4 /Bi 4 V 2 O 10 /FeOOH/NiOOH photoanode achieves a photocurrent density of 4.48 mA/cm 2 at 1.23 V versus the reversible hydrogen electrode and an applied bias photon-to-current efficiency of 1.69 % at 0.63 V versus the reversible hydrogen electrode—significantly outperforming bare BiVO 4 . This enhanced photoelectrochemical performance is attributed to the identical elemental composition and well-aligned energy band positions of Bi 4 V 2 O 10 and BiVO 4 , which minimize charge recombination at the interface. Additionally, the FeOOH/NiOOH double-layer cocatalyst facilitates rapid transfer of photogenerated carriers, as confirmed by femtosecond transient absorption spectroscopy and transient photovoltage measurements. This approach provides a novel and effective pathway for advancing high-efficiency photoelectrochemical cells.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）