ACS Omega
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2021
·
IF 3.512
Zhihui Qin,Weiwei Su,Ping Liu,Jinming Ma,Yaru Zhang,Tifeng Jiao
Iron ions play an important role in our lives. Excessive or lack of iron ion intake leads to many diseases. At the same time, the water environment is easily polluted by these metal ions with the acceleration of industrialization. Therefore, the detection of iron ions in the water environment and the human body is particularly important. In this paper, we prepared a RhB-EDA fluorescent probe by condensing rhodamine B (RhB) with ethylenediamine (EDA) for high recognition of Fe3+. A RhB-EDA molecule itself is colorless and has no fluorescence emission in an alcohol solution. When Fe3+ was added, the lactam ring structure of the fluorescent probe opened, and the UV and fluorescence spectra changed. At the same time, the color of the mixed solution gradually deepened toward pink. Therefore, dual spectral detection and naked-eye observation of Fe3+ were realized. In addition, with the decrease of the pH value and the prolongation of chelating time, the ultraviolet absorbance and fluorescence emission intensity were enhanced and the color of the mixed solution deepened. The RhD-EDA fluorescent probe is simple and accurate and provides good technical support for the detection of Fe3+.
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ULTRASONICS SONOCHEMISTRY
·
2019
·
IF 7.279
Guanshu Li,Ludong Yi,Jun Wang,Youtao Song
In this paper, a novel method, hydrodynamic cavitation (HC) combined with Fe 3+ -doped TiO 2 , for the degradation of organic pollutants in aqueous solution is reported. The venturi tubes with different geometric parameters (size, shape and half divergent angle) are designed to obtain a strong HC effect. The structure, morphology and chemical composition of prepared Fe 3+ -doped TiO 2 as catalyst are characterized via using XRD , SEM, TEM , XPS, UV-vis DRS and PL methods. The effects of added TiO 2 (heat-treated at different temperatures for different times) and Fe 3+ -doped TiO 2 (with different mole ratios of Fe and Ti) on the HC catalytic degradation of RhB are discussed. The influences of operation parameters including inlet pressure, initial RhB concentration and operating temperature on the HC catalytic degradation of RhB are studied by Box-Behnken design (BBD) and response surface methodology (RSM). Under 3.0 bar inlet pressure for 10 mg/L initial concentration of RhB solution at 40 °C operating temperature in the presence of Fe 3+ -doped TiO 2 with 0.05:1.00 M ratio of Fe and Ti, the best HC degradation ratio can be obtained (91.11%). Furthermore, a possible mechanism of HC degradation of organic pollutants in the presence of Fe 3+ -doped TiO 2 is proposed. Perhaps, this study may provide a feasible method for a large-scale treatment of dye wastewater.
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JOURNAL OF FLUORESCENCE
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2019
·Vol. 29
·期 5
·1221-1226
·
IF 1.913
Yan Liqiang,Xie Ya,Li Jianping
Development of optical probe for the detections of Fe 3+ and Cu 2+ is one of the most active and interesting research directions in analytical chemistry because of their vital roles in the environment protection and human health. Herein, a turn on optical rhodamine B-based probe (probe 1) with the significant changes in color and fluorescence has been prepared. The color of this probe solution changed from colorless to amaranth in the presence of Fe 3+ and to pink in the presence of Cu 2+ , which is promising for the qualitative recognition of Fe 3+ and Cu 2+ . More importantly, probe 1 could be used for the quantitative analysis of Fe 3+ and Cu 2+ by fluorescence enhancement. The detection limits for Fe 3+ and Cu 2+ reached 8.1 × 10 −8 M and 4.8 × 10 −7 M, respectively. Furthermore, it was found that this probe can also be used for fluorescence imaging of Fe 3+ and Cu 2+ in living cells.
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JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 11
·8216-8225
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IF 3.442
Xu Wen,Cao Bo,Lin Hechun,Cheng Wenjuan,Luo Chunhua,Peng Hui,Duan Chungang
The catalytic activities of three topotactic phase strontium cobaltites (SCO, hexagonal, orthorhombic and tetragonal) for H 2 O 2 decomposition were studied. All they present excellent catalytic activity with good stability at cycled test, and the mesoporous tetragonal SCO exhibits the best activity. Detailed kinetic research indicates the zero-order process of H 2 O 2 decomposition. Increasing the temperature will accelerate the reactions greatly with the controlled temperature in the range of 20–45 °C. The calculated active energy ( E a ) for H-SCO, O-SCO and T-SCO is 93.2, 85.1 and 87.5 (kJ/mol), respectively. The efficient catalytic degradation of Rhodamine B illustrates that SCO is a kind of promising catalysis for the advanced oxidation process.
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Materials Research Express
·
2018
·Vol. 5
·期 6
·065906
·
IF 1.151
Dong Mao,Lishan Zhu,Xiaofeng Fei,Xinyu Zheng,Dong Fang
The fabrication of indium sulfide/graphene oxide composites (In2S3@GO) via a novel hydrothermal method was reported. The morphology of the composites showed that the daisy-like In2S3 structures were dispersed evenly on GO with large specific surface area. The photocatalytic performance of In2S3@GO was evaluated through photodegradation Rhodamine B. In2S3@GO exhibits higher photodegradation performance than that of pure In2S3. In addition, the composites showed great adsorption-desorption ability and stability. The solution pH value also has a significant influence on photocatalytic activity of In2S3@GO. This work may provide new insights to construct carbon-based semiconductor photocatalyst for organic dye pollution degradation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2018
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IF 3.927
Peng Shi,Xingkang Hu,Yiting Wang,Ming Duan,Shenwen Fang,Wenjuan Chen
A polyether sulfone (PES) microfiltration membrane was decorated by the deposition of mixture of polyethylene glycol (PEG) and tannic acid (TA). It was used as an adsorbent for the removal of Rhodamine B (RhB) from water and had a high removal ratio (>98.9%) at high flux up to 4777 L/(m 2 ⋅h) in dynamic test. The mixture of PEG and TA formed a stable suspension but it transformed to a viscous mixture during permeating the narrow channel of membrane, which resulted in high dispersion of the TA within the membrane and good dye adsorption. The turbulence and high driving force in the dynamic test ensured good contact of dye and the adsorbent, which led to good dye removal, while in stationary adsorption test it had only moderate dye adsorption. Molecular dynamics study revealed the molecular weight of PEG had an effect on the aggregation morphology of PEG and TA, as well as the exposure of TA on the surface, leading to different removal performance. Our study provided a simple and quick method to prepare adsorbent for the fast removal of dye from water.
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MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Hongduo Yao,Xiaoxue Wang,Jianping Gao,Chunjuan Gao,Ruiru Zhao,Xiangang Zhai,Yongli Wu,Chaoyue Hao,Jiangbing Yang,Shunkang Mei,Haixia Qiu
Waste water treatment with adsorbents has become one of the most effective methods. In this work, we have reported the preparation of the flower-like Cu 2 MoS 4 /g-C 3 N 4 composites. The Cu 2 MoS 4 nanosheets were arranged in a flower-like structure by a simple one-step hydrothermal synthesis method and attached to g-C 3 N 4 nanosheets. The as-prepared flower-like Cu 2 MoS 4 /g-C 3 N 4 composites was found to have potential for the adsorption of RhB in aqueous solution. The microstructure of the product was analyzed by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscope (XPS), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET). The effects of the ratio of the composite material, the initial concentration of the dye and the contact time were explored. The Langmuir maximum adsorption capacity of the flower-like Cu 2 MoS 4 /g-C 3 N 4 composites for RhB was reached 420.2 mg/g. Moreover, the adsorption process is consistent with the pseudo second-order kinetic model, the Langmuir isotherms model and the Freundlich isotherms model.
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JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Lili Jiang,Ying Zhang,Minghua Zhou,Liang Liang,Kerui Li
In this study, porous carbon aerogel (CA) was synthesized with D-glucose, ammonium persulfate and aniline by a hydrothermal carbonization method. It was reported for the first time as an excellent catalyst for activating persulfate (PS) to degrade rhodamine B (RhB). The morphology of CA was characterized, exhibiting microporous and mesoporous structures. The solution pH of 3, 5, 7 and 9 showed slight impact on the degradation of RhB; however, when the pH increased to 11, the removal of RhB decreased. The PS concentration and CA dosage played a key role in the RhB degradation, and the activation energy was calculated to be 22.11 kJ/mol. Electron paramagnetic resonance (EPR) spectra suggested that neither sulfate radical (SO4 − ) nor hydroxyl radical ( OH) was generated from the PS activation. The radical quenching experiments also confirmed that CA activated PS in a non-radical pathway. It was indicated that PS bonded with C C in the sp 2 hybridized system could directly degrade RhB. The defective edges at the boundary of CA also facilitated the RhB removal. This work presented a green material with both excellent catalytic performance and high regeneration possibility in the heterogeneous metal-free PS activation, providing a new strategy in water treatment.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2014
·Vol. 29
·期 1
·12-19
·
IF 2.017
Hongxu Guo,Fan Lin,Jianhua Chen,Feiming Li,Wen Weng
A metal–organic framework material, MIL-125(Ti), was solvothermally prepared and characterized using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and surface area measurements. MIL-125(Ti) was then used as an adsorbent for Rhodamine B (RhB) removal in aqueous solution. The adsorption kinetics, adsorption mechanism, adsorption isotherm, activation energy and various thermodynamic parameters were studied in detail. The maximum adsorption capacity of MIL-125(Ti) for RhB was 59.92 mg g −1 . MIL-125(Ti) appears to be a promising material for RhB adsorption from aqueous solutions. Copyright © 2014 John Wiley & Sons, Ltd.
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Nanomaterials and Nanotechnology
·
2016
·
IF 1.109
JiaDong Chen,WeiSha Liao,Ying Jiang,DanNi Yu,MeiLing Zou,Han Zhu,Ming Zhang,MingLiang Du
In this study, novel titanium dioxide (TiO2) and zinc oxide (ZnO) hybrid photocatalysts in the form of nanofibres were fabricated by a facile method using electrospinning followed by a calcination process. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were employed to investigate the morphology and structure of the heterogeneous nanofibres. The photocatalytic performances were evaluated via the photodegradation of Rhodamine B (RhB) under irradiation with UV light. Due to the low recombination rate of photo-induced charge carriers, the high utilization efficiency of UV light and the large contact area with the target molecules, the ZnO/TiO2 hybrid nanofibres exhibited high catalytic activity towards the Rhodamine B, and the amount of Zn(OAc)2 in the precursor of these nanofibres played an important role in determining the photo decomposition performance.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Ran Jiang,Dengjie Zhong,Yunlan Xu,Haixing Chang,Pengfei Liao,Yuanzhen He,Jiayou Zhang
How to improve the issues of ion agglomeration and metal ion leaching, and how to prepare cobalt-based catalysts with high reactivity and stability, are highly desired yet challenging. In this paper, MoS 2 modified Co-MOF derived nitrogen-doped carbon (Co/PCN/MoS 2 ) microspheres rich in active sites were prepared using a simple carbonation-hydrothermal method, with g-C 3 N 4 , MoS 2 and Co-MOF to overcome the aforementioned limitations. The flower-like nanostructure of MoS 2 contributed to exposing more marginal active sites, allowing the high dispersion of Co-MOF within its structure. Meanwhile, Mo 4+ /Mo 6+ and S species coexisted in MoS 2 , which promoted the valence cycle and electron transfer process, and improved the catalytic activity of the composite. The successful synthesis of Co/PCN/MoS 2 was proved by XRD , SEM and FTIR characterizations. The electrochemical performance analysis showed that Co/PCN/MoS 2 exhibited higher redox capacity than MoS 2 , and Co/PCN/MoS 2 /PMS system achieved the degradation rate of RhB as high as 97.19% within 30 min, which is higher than that of Co-MOF/g-C 3 N 4 /PMS (80.67%), Co-MOF/MoS 2 /PMS (78.08%), Co-MOF/PMS (77.00%), g-C 3 N 4 /PMS (53.68%) and MoS 2 /PMS (28.10%) systems. It had good anti-interference ability against coexisting substances, achieved good degradation performance in a wide pH range (pH 2.0–10.0), and possessed excellent stability and reusability with RhB degradation rate of 91.10% after 5 cycles. The quenching test confirmed that non free radical 1 O 2 is the main ROS for RhB degradation. This work is expected to provide a new idea and direction for the design and development of metal-doped heterogeneous catalysts with high activity and stability.
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Nanomaterials
·
2025
·Vol. 15
·期 5
·410
·
IF 4.3
Yongxin Lu,Shangjie Gao,Teng Ma,Jie Zhang,Haixia Liu,Wei Zhou
The construction of heterojunctions can effectively inhibit the rapid recombination of photogenerated electrons and holes in photocatalysts and offers great potential for pollutant degradation. In this study, a Z-scheme heterojunction g-C3N4/WO3photocatalyst was synthesized using a combination of hydrothermal and calcination methods. The photocatalytic degradation performance was tested under visible light; the degradation efficiency of Rh B reached 97.9% within 15 min and that of TC-HCl reached 93.3% within 180 min. The excellent photocatalytic performance of g-C3N4/WO3composites can be attributed to the improved absorption of visible light, the increase in surface area, and the effective separation of photogenerated electron–hole pairs. In addition, after four cycles of experiments, the photocatalytic performance of g-C3N4/WO3did not decrease obviously, remaining at 97.8%, which proved that the g-C3N4/WO3heterojunction had high stability and reusability. The active radical capture experiment confirmed that h+and ·O2−played a leading role in the photocatalytic degradation. The Z-scheme heterojunction g-C3N4/WO3designed and synthesized in this study is expected to become an efficient photocatalyst suitable for environmental pollution control.
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