MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Huixin Xiong,Bailin Zhang,Can Cui,Yiqun Xu
The synthesized polyaniline/FeOOH composite characterized by SEM, HRTEM, XRD , FT-IR and BET, was used as adsorbent for Acid Orange II (AOII). The kinetics, isotherm and thermodynamics of AOII adsorption by polyaniline/FeOOH were studied by batch experiments. And effects of pH and coexisting ions on AOII removals were also investigated. Adsorption kinetics and isotherm well fitted pseudo second-order kinetic model and Langmuir isotherm model, respectively. The maximum adsorption capacity of polyaniline/FeOOH for AOII could reach 155.8 mg g −1 . It showed that polyaniline/FeOOH composite could rapidly and efficiently remove AOII from aqueous solutions. In addition, thermodynamic result indicated that the adsorption was a spontaneous endothermic process. Removal ratio of AOII (100 mg/L) increased as pH decreased and could reach 98.6% at pH3. And anions coexisting in the solutions could inhibit the adsorption effect, while the cations have negligible influence. Also, PANI/FeOOH had better applicability to the different types of anionic dyes. The regeneration of polyaniline/FeOOH loading 98.6% of AOII evaluated for three cycles and there was about 70% of AOII loaded on final adsorbent.
研究领域:
环境科学
·
材料科学
·
物理化学
·
水处理技术
·
吸附科学
✓ 已验证
DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 5
·447
·
IF 4.562
Yue Yao,Changyu Hou,Xin Zhang
A promising α-FeOOH-reduced graphene oxide aerogel (FeOOH-GA) has been prepared for the assembly of an enzyme electrode. The α-FeOOH-reduced graphene oxide aerogel was characterized by X-ray powder diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Raman, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The results reveal that graphene oxide is reduced by Fe2+ion and α-FeOOH nanorods anchored on the reduced graphene oxide sheet through the Fe-O-C bond. Analyses using scanning electron microscopy and the Brunauer–Emmett–Teller method show that FeOOH-GA displays a various and interconnected pore structure. The FeOOH-GA was used as a support material on the glass carbon electrode (GCE) for glucose oxidase (GOD). Electrochemistry properties and bioelectrocatalytic activities of Nafion/GOD/FeOOH-GA/GCE were achieved from cyclic voltammetry and electrochemical impedance spectroscopy. The results show that Nafion/GOD/FeOOH-GA/GCE maintains outstanding catalytic activity and electrochemical properties. The FeOOH-GA could immobilize GOD through the hydrophobicity of the reduced graphene oxide and hydroxide radical of α-FeOOH. Appropriate α-FeOOH and diversified pore structure are beneficial for electron transfer, enzyme electrode storage, and interfacial electron transfer rate. All results indicated that the α-FeOOH-reduced graphene oxide aerogel as a carrier could effectively immobilize the tested enzyme.Keywords:α-FeOOH;enzyme electrode;electrochemical catalysis;carrier
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Shengnan Huang,Fengxi Chen,Deyu Zhu,Jun Li,Yunling Liu,Rong Chen
Chlorophenols (CPs) are universal and toxic pollutants in nature, as they have been widely detected in surface water, groundwater, sediment, ambient air, soil, and the human body. In this work, novel FeOOH/BiO 2-x binary heterostructure composites with UV-Vis-NIR full-spectrum response were successfully constructed by anchoring highly dispersed amorphous FeOOH on BiO 2-x nanosheets. A series characterization indicated the binary components were successfully obtained. The FeOOH/BiO 2-x photocatalysts exhibited highly enhanced photocatalytic activity for the degradation of chlorophenols under UV-Vis-NIR full-spectrum irradiation. The amorphous FeOOH could effectively broaden the light response range, modulate the energy band structure and promote the separation and transfer of photogenerated electron-holes pairs, thus boosting the activation of molecular oxygen to generate •O 2 – . Furthermore, FeOOH/BiO 2-x maintained excellent photocatalytic performance upon real solar light of varied irradiance for consecutive 7 days, indicative of great potential towards phenolic pollutants degradation in water. The redox couples of Fe 3+ /Fe 2+ and Bi (3+x)+ /Bi 3+ also accelerate the efficient generation of reactive oxygen species over FeOOH/BiO 2-x with improved durability. This work not only contributes to the design of full-spectrum responsive photocatalysts, but also provides a rational strategy for molecular oxygen activation towards the elimination of emerging contaminants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Miaomiao Zhu,Qinwei Fan,Yixin Zhang,Shuang Chen,Wenxuan Cao,Ranhua Xiong,Chaobo Huang,Haifeng Lu,Wenjing Ma
In order to deal with the environmental pollution caused by complex oily wastewater, it is necessary to develop filtration membrane materials. However, significant challenges such as poor effect of emulsion separation, limited functionality, and susceptibility to membrane fouling require urgent resolution. Here, we successfully prepared a β-hydroxyl iron oxide/polydopamine-polyethylenimine/polyacrylonitrile (β-FeOOH/PDA-PEI/PAN) nanofiber membrane for treatment of complex wastewater by growing PDA-PEI on a blow-spinning PAN nanofiber membrane and decorating the membrane with β-FeOOH. The porous structure and the large number of hydrophilic groups greatly increase the hydrophilicity of the membrane and give the membrane high permeation fluxes (11531.26 L m −2 h −1 ) for surfactant-free kerosene-in-water emulsion. The loaded β-FeOOH nanorods increase the roughness of the membrane surface, which enhances the underwater superoleophobic ability of the membrane, and promotes the demulsification of the emulsion and makes it have high separation efficiency of 99.48 % for surfactant-stabilized kerosene-in-water emulsion. In addition, the β-FeOOH/PDA-PEI/PAN also exhibited high organic dye removal efficiency (99.38 %) due to the presence of β-FeOOH. The synergistic effect of low oil adhesion and photocatalysis enhances the antifouling and self-cleaning performances of the material. Significantly, the multifunctional membrane also shows exceptional oil/water separation ability and good stability. The presented synergistic strategy of β-FeOOH/PDA-PEI/PAN membrane materials represents a prospective candidate for the treatment of complex wastewater.
研究领域:
环境科学
·
材料科学
·
水处理
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 12
·2913
·
IF 4.2
Jingren Yang
Developing a low-cost and highly efficient semiconductor photocatalyst for the decomposition of organic pollutants and antibiotics is highly desirable. Herein, FeOOH nanosheets were prepared using a liquid-phase stirring technique and combined with ZnCdS (ZCS) nanoparticles to construct FeOOH/ZCS nanocomposite photocatalysts. The photocatalytic efficiency of the FeOOH/ZCS nanocomposite was evaluated for the decomposition of various pollutants, including rhodamine B, methylene Blue, and tetracycline. The FeOOH/ZCS nanocomposite exhibited significantly higher photocatalytic performance for the decomposition of various organics. Moreover, the optimized FeOOH/ZCS retained more than 90% of its initial photocatalytic activity even after five successful runs. Radical quenching test and electron spin resonance (ESR) analysis revealed that hydroxyl radicals (•OH) play a dominant role for the decomposition of organics. The FeOOH/ZCS Z-scheme heterojunction significantly facilitates higher charge transfer efficiency and the generation of reactive radicals, resulting in excellent photocatalytic degradation performance. This work offers a new approach to synthesis FeOOH-based photocatalyst for the elimination of organics and antibiotics in water.
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
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xianqiang Xiong,Chuanqun Zhang,Xiao Zhang,Liya Fan,Lujia Zhou,Yuxiao Chu,Weiya Huang,Chenglin Wu,JiangShan Li,Xiaogang Yang,Deman Han
Nanoporous BiVO 4 is a promising photoanode material for driving the photoelectrochemical (PEC) water splitting to hydrogen energy, whereas its performance is limited by the sluggish surface catalysis reaction. Herein, a facile citrate-assisted method was developed for growing uniform amorphous FeOOH overlayer on nanoporous BiVO 4 , which significantly improved the water oxidation kinetics and resulted in a remarkable photocurrent density of 3.33 mA cm −2 at 1.23 V (vs. RHE). The activity enhancement was even superior to the well-crystallized α-FeOOH and β-FeOOH modified BiVO 4 . The citrate serves as the bridging agent that not only optimizes the BiVO 4 /FeOOH interface facilitating the hole trapping/transport, but also inhibits the particle growth of FeOOH nanolayer and provides more oxygen vacancies to promote the water oxidation. We demonstrate that the uniform FeOOH overlayer acts as the hole storage layer and catalyst, which increases the potential drop in the Helmholtz layer and greatly facilitates the interfacial hole transfer. Moreover, the citrate-assisted modification method was proved to be a general strategy to improve the PEC performance of TiO 2 and α-Fe 2 O 3 photoanodes. Our work provides a simple and effective design strategy for constructing uniform semiconductor/electrocatalysts interface that can realize efficient solar-to-hydrogen conversion.
研究领域:
材料科学
·
能源转换与储存
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yuhuan Wang,Dengchao Wang,Shuqing Dong,Jianyu Qiao,Zhixing Zeng,Shijun Shao
Photoelectrochemical (PEC) analysis technique provides a unique route for sensitive biomolecular detection. In this paper, a novel visible-light-driven PEC sensor for detection of dopamine (DA) was fabricated based on ultrathin FeOOH cocatalyst modified nanoporous BiVO 4 photoanode. Scanning electrochemical microscopy (SECM) technique was employed to characterize the photocatalytic activities of the as-prepared photoanodes surfaces, and the first-order heterogenous electron transfer rate constants ( K eff ) were evaluated, which further revealed the photocatalytic performance of the modified photoanodes in water oxidation and the PEC sensing mechanism. A remarkable water oxidation photocurrent on the ITO/BiVO 4 /FeOOH photoanode could be achieved and served as anodic photocurrent of blank sample for PEC sensing dopamine (DA), which showed linearly range of 0.2–40 μM and 40–1400 μM with a detection limit of 0.09 μM. This method showed simplicity, high sensitivity and selectivity, high stability and wide linearity range, which provided a promising platform for the development of PEC sensor and offered an insight into the exploitation of BiVO 4 -based photolysis water materials for PEC bioanalytical purposes.
研究领域:
生物医学工程
·
材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shiwei Tian,Yaqi Zhang,Qiankun Sha,Xingxiang Zhang,Tian Yang,Xuhuan Yan,Na Han
Polyphenylene sulfide (PPS) microporous membranes have garnered extensive research enthusiasm concerning their outstanding permeation performance and separation accuracy in treating oily wastewater. Nevertheless, the inherent hydrophobic chemical structure, along with the noticeable concentration polarization effect, predisposes them to severe membrane contamination during the separation process. Accordingly, it is desirable to design a PPS self-cleaning membrane with superior anti-fouling capability, fast transport, and remarkable flux recovery. This study marks the first combination of PPS membrane materials with the photo-Fenton process. In detail, the polyphenol (tannic acid, TA)-polycation (polyethyleneimine, PEI)-metal ion (Fe 3+ ) double cross-linking coatings were first assembled on the PPS substrate surface. Subsequently, β-FeOOH photocatalysts were synthesized through in-situ mineralization to further strengthen the hydrophilicity of the membranes. The obtained PPS/TA-PEI/β-FeOOH composite membrane achieved exceptional separation of diverse oil-in-water (O/W) emulsions. The PPS/TA-PEI/β-FeOOH membranes exhibited in-air superhydrophilic and under-water superoleophobicity, exhibiting under-water oil contact angles greater than 151° for diverse oil agents. The fabricated composite membranes displayed high permeability (a flux of the petroleum ether-in-water (P/W) emulsion reached 3400.5 L m −2 h −1 bar −1 driven by a pressure of 0.05 MPa) along with ideal oil rejection (98.6 %). Significantly, the PPS/TA-PEI/β-FeOOH membrane possessed powerful photo-Fenton self-cleaning capability, and its flux recoveries of the contaminated membrane exceeded 90.3 % for varied O/W emulsions after being cleaned by visible light for 10 min. We believe that our research presents a novel approach for the exploitation of PPS-based photo-Fenton self-cleaning membranes, which also exhibit great applicative potential in oily wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 30
·期 2
·513-524
·
IF 1.637
Liu Huixiang,Li Zhongyu,Wang Shuang,Yuan Conghui,Xu Yiting,Luo Weiang,Chen Guorong,Zeng Birong,Dai Lizong
α-FeOOH nanocrystals were grown on the surface of polymeric spheres through in situ hydrothermal synthesis. The polymer with the surface amine groups was composed of styrene, divinylbenzene and 2-(dimethylamino)ethyl methacrylate via emulsion polymerization, which abbreviated it as PSDM. The structure and component of PSDM@α-FeOOH composites were investigated by Fourier transform infrared, thermogravimetric analysis, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope and transmission electron microscopy. It was observed that the crystal structure, morphology and dispersion of α-FeOOH depended on different factors, i.e., temperature, reactant concentration and ferric salt types. A plausible formation mechanism of PSDM@α-FeOOH composites was revealed based on the systematic investigations of the assembly process. Additionally, it was possible for this method to be extended to synthesis the composite particles for other metal ions. The photocatalytic activity of the composites had been discussed by testing the degradation of rhodamine B as well as methylene blue and neutral red in the presence of H 2 O 2 . The measurements demonstrated that PSDM@α-FeOOH composites catalyst exhibited excellent photocatalytic ability and superior stability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Huixuan Zhang,Jinning Wang,Xinyi Zhang,Bo Li,Xiuwen Cheng
In the present study, a novel Co 3 O 4 /δ-FeOOH composite was successfully fabricated. Subsequently, we measured its crystal structure, morphology, and surface area. After this, the Co 3 O 4 /δ-FeOOH composite was applied to activate peroxymonosulfate (PMS) for lomefloxacin (LOM, a type of fluoroquinolones) degradation. Compared with pure Co 3 O 4 and δ-FeOOH, Co 3 O 4 /δ-FeOOH composite exhibited the best efficiency towards LOM degradation, in which the removal of LOM (>82%) and first order reaction kinetic rate constant (k app = 0.064 min −1 ) were achieved after 25 min reaction with 0.25 g·L −1 Co 3 O 4 /δ-FeOOH, 0.49 mM PMS, and 10 mg·L −1 (28.5 μM) LOM at initial pH 6.08. Next, we considered the concentration of catalyst, PMS and the effect of pH on LOM degradation. The results showed that the increase of PMS and catalyst was beneficial for the degradation of LOM. Moreover, the highest degradation efficiency of LOM was achieved under neutral conditions, which was due to the minimum repulsive force between the PMS and the catalyst. In addition, active radical scavenging experiment was performed and it was found that the contribution of hydroxyl radicals was greater than that of sulfate radicals. Subsequently, possible reaction mechanism was proposed. What’s more, possible degradation intermediates in Co 3 O 4 /δ-FeOOH system were determined and five decomposition pathways were proposed. Meanwhile, activated sludge inhibition experiment was carried out to evaluate the variation of toxicity of the LOM and its degradation intermediates in the oxidation process. Overall, this work provided a new strategy for the practical application of sulfate radicals-based advanced oxidation processes (SR-AOPs) in wastewater treatment.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jiajia Li,Yi Li,Mengzhen Zhu,Qiong Mei,Xi Tang,Yao Wu,Shijun Yue,Yuping Tang,Qizhao Wang
Photocatalysis-Fenton degradation of antibiotic pollutants is an attractive avenue, but its practical application is limited by easy recombination of photocarriers and low efficiency of Fe 3+ /Fe 2+ cycling. This work intends to introduce aloe-emodin into FeOOH with the purpose of improving the carrier separation rate by organic-inorganic heterojunction , as well as promoting the iron cycle (Fe 3+ /Fe 2+ ) transformation and inhibiting Fe 3+ precipitation in photocatalysis-Fenton through its complexation and reducibility, so as to achieve efficient degradation of antibiotic pollutants. Conspicuously, the prepared aloe-emodin/FeOOH sample showed nearly 85% tetracycline (TC) removed within 1 h with visible light and H 2 O 2 , which was almost 2.02 and 2.12 times larger than those of aloe-emodin and FeOOH, separately. The superior degradation performance ascribed to the synergistic effect of the aloe-emodin and FeOOH in the presence of H 2 O 2 as a strong oxidant. Moreover, the paper is focused on the effects of aloe-emodin/FeOOH interface structural characteristics on transmission modes of carriers and surface catalytic kinetics. The generated •OH, •O 2 − and 1 O 2 could serve as the active species achieving relatively high efficiency of Fe 3+ /Fe 2+ cycling and rapidly photogenerated charge separation in the degradation progress. Finally, we have tried to illustrate the internal mechanism of photocatalysis-Fenton treatment of antibiotic pollutants by aloe-emodin/FeOOH. Additionally, these investigations will provide practical and technical support for further exploitation of similar organic-inorganic photocatalysts, which is expected to accelerate the development of photocatalysis-Fenton degradation in the field of environmental purification.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shu-ao He,Wei Li,Xiao Wang,Qiong Ma,Min Li,Wei Xu,Xue-chuan Wang,Chen-hui Zhao
The two-dimensional (2D) g-C 3 N 4 has a wide application prospect in photocatalysis field due to its larger surface reactions, wider absorption of light and faster charge separation. However, the lack of active site of reduction leads to its poor hydrogen evolution reaction (HER) activity. In this work, the intermediate β-FeOOH was synthesized as a high-efficiency precious metal free co-catalyst in hydrogen production. Then, the g-C 3 N 4 -Fe 3 O 4 /β-FeOOH (CNFF-x,y, x = 1, 2 and 3, y denotes the reaction time (h)) photocatalyst based on p-n and Z-scheme heterojunction was constructed via a subsequent solvothermal process. The chemical composition, microtopography, crystallography, photochemical and electrochemical properties of the CNFF-x,y were analyzed by XRD, FI-IR, TEM, XPS and so on. The visible-light-driven (VLD) catalytic performance of CNFF-x,y heterojunction was evaluated by the hydrogen evolution reaction (HER). Results showed that CNFF-2,10 photocatalyst based on p-n (g-C 3 N 4 -Fe 3 O 4 ) and Z-scheme (Fe 3 O 4 /β-FeOOH) heterojunction presented the highest VLD catalytic HER activity (33.25 μmol g −1 h −1 ) at the absence of Pt co-catalyst after illumination for 6 h. It indicated that the effective introduction of Fe 3 O 4 /β-FeOOH nanoparticles (NPs) into g-C 3 N 4 to construct double-heterojunction (g-C 3 N 4 -Fe 3 O 4 /β-FeOOH) could greatly broaden the light response property and inhibit the recombination of photo-induced carriers, exhibiting enhanced HER activity. Meanwhile, this double-heterojunction photocatalyst presented robust photostability and reproducibility even been used several times. The findings of an intermediate β-FeOOH were put forward in this study will provide some new ideas for the research of HER.
研究领域:
材料科学
·
光催化
·
能源化学
✓ 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）