Nanomaterials
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2022
·Vol. 13
·期 1
·142
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IF 5.719
Jing Ni,Jianfei Lei,Zhaowu Wang,Lanlan Huang,Hang Zhu,Hai Liu,Fuqiang Hu,Ting Qu,Huiyu Yang,Haiyang Yang,Chunli Gong
In this paper, mesoporous CuO with a novel architecture was synthesized through a conventional hydrothermal approach followed by a facile sintering procedure. HR-TEM analysis found that mesoporous CuO with an interconnected pore structure has exposed high-energy crystal planes of (002) and (200). Theoretical calculations indicated that the high-energy crystal planes have superior adsorption capacity for H+ions, which is critical for the excellent adsorption and remarkable photocatalytic activity of the anionic dye. The adsorption capacity of CuO to methyl orange (MO) at 0.4 g/L was approximately 30% under adsorption equilibrium conditions. We propose a state-changing mechanism to analyze the synergy and mutual restraint relation among the catalyst CuO, H+ions, dye and H2O2. According to this mechanism, the degradation rate of MO can be elevated 3.5 times only by regulating the MO ratio in three states.Keywords:mesoporous;photocatalyst;adsorption;methyl orange;CuO
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Polymers
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2022
·Vol. 14
·期 17
·3584
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IF 4.967
Mingpan Zhang,Fuli Wang,Xinran Shi,Jing Wei,Weixia Yan,Yihang Dong,Huiqiang Hu,Kai Wei
In this study, an iron oxide/carbon nanofibers (Fe2O3/CNFs) composite was prepared by a combination of electrospinning and hydrothermal methods. The characterization of Fe2O3/CNFs was achieved via scanning electron microscopy (SEM), infrared spectroscopy (IR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). It is shown that when the hydrothermal reaction time was 180 °C and the reaction time was 1 h, the Fe2O3nanoparticle size was about 90 nm with uniform distribution. The photodegradation performance applied to decolorize methyl orange (MO) was investigated by forming a heterogeneous Fenton catalytic system with hydrogen peroxide. The reaction conditions for the degradation of MO were optimized with the decolorization rate up to more than 99% within 1 h, which can decompose the dyes in water effectively. The degradation process of MO by Fenton oxidation was analyzed by a UV-visible NIR spectrophotometer, and the reaction mechanism was speculated as well.Keywords:Fe2O3;carbon nanofibers;heterogeneous Fenton;methyl orange (MO)
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Surfaces and Interfaces
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2025
·
IF 6.3
Yajie Cheng,Zichen Xu,Qiang Wang,Kexin Zhang,Lin Wang,Yongbo Deng,Teng Ma,Hao Wei,Zengxian Guo
To address the issues of high filler content and poor wave absorption performance in single-component absorbers, we constructed tubular high-dielectric polypyrrole (PPy) through morphology control and doping, achieving high-performance microwave absorption at ultra-low filler content. This study utilized various surfactants for the oxidative polymerization of high-dielectric PPy (PPy-S X ) and its micromorphology was further optimized via pH regulation to further obtain excellent impedance matching of PPy (PPy-S 5 -X). Experimental results reveal that non-ionic surfactants, particularly methyl orange (MO), significantly improve the dielectric properties of tubular PPy (PPy-S 5 ). pH-regulation (from pH 1 to 11) markedly influences micromorphology. PPy-S 5 –5 (pH=5.0) possesses the most remarkable nanoparticle-nanotube morphology for impedance matching at ultralow filling content. With a thickness of 2 mm, PPy-S 5 –5 (5 wt% filling amount) exhibits an RL min of –40.88 dB with an effective absorption bandwidth of 5.04 GHz (10.24–15.28 GHz). By contrast, the RL min of PPy-S 5 –5 is over six times better than that of PPy-S 1 synthesized using cetyltrimethyl ammonium bromide (CTAB). This superior microwave absorption performance is due to enhanced electromagnetic wave loss for two main reasons: First, MO as a soft template promotes tubular PPy formation, allowing charges to continuously move and transfer between molecules to enhance conduction loss. Additionally, pH regulation optimizes particle distribution on PPy nanotubes, improving multi-interface interactions and interfacial polarization. This micromorphology regulation strategy of PPy unlocks its potential as a lightweight, efficient absorbent material, achieving superior absorption performance at low filling volumes in wave-absorbing applications.
研究领域:
材料科学
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电磁学
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高影响因子
Polymers
·
2020
·Vol. 12
·期 1
·167
·
IF 3.426
Yuanli Liu,Liushuo Song,Linlin Du,Peng Gao,Nuo Liang,Si Wu,Tsuyoshi Minami,Limin Zang,Chuanbai Yu,Xu Xu
Surface-functionalized polymeric microspheres have wide applications in various areas. Herein, monodisperse poly(styrene–methyl methacrylate–acrylic acid) (PSMA) microspheres were prepared via emulsion polymerization. Polyaniline (PANI) was then coated on the PSMA surface via in situ polymerization, and a three-dimensional (3D) structured reticulate PANI/PSMA composite was, thus, obtained. The adsorption performance of the composite for organic dyes under different circumstances and the adsorption mechanism were studied. The obtained PANI/PSMA composite exhibited a high adsorption rate and adsorption capacity, as well as good adsorption selectivity toward methyl orange (MO). The adsorption process followed pseudo-second-order kinetics and the Langmuir isotherm. The maximum adsorption capacity for MO was 147.93 mg/g. After five cycles of adsorption–desorption, the removal rate remained higher than 90%, which indicated that the adsorbent has great recyclability. The adsorbent materials presented herein would be highly valuable for the removal of organic dyes from wastewater.Keywords:polyaniline;emulsion microsphere;methyl orange;adsorption
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Xianmiao Pan,Na Zhao,Hu Shi,He Wang,Fangtao Ruan,Hongjie Wang,Quan Feng
Removing textile dye by activated carbon adsorption from wastewater has become a focus issue owing to its easy operation, rapid adsorption ability, and relatively high removal efficiency. Biomass-based activated carbon is an excellent candidate due to its renewability and easy accessibility, but the biomass resources like peel and stem are usually with relatively long growth cycle and the removal efficiency within a wide pH range is relatively low. Thus, a biomass carbon source with a short growth cycle and activated carbon with high removal efficiency within a wide pH value needs to be explored. In this study, golden needle mushroom root-based activated carbon (GNMACs) activated by H 3 PO 4 was successfully prepared, characterized, and applied in methylene blue (MB) and methyl orange (MO) removal. The carbonization temperature (400 °C ∼ 600 °C), the GNMACs dosage (5 mg ∼ 25 mg), and the dye solution pH (4 ∼ 12) were controlled. The results indicated the optimal adsorption performance can be achieved with the carbonization temperature of 550 °C and the adsorbent dosage of 20 mg. The GNMACs carbonized at 550 ℃ possessed a porous structure with the mesopore volume of 1.095 cm 3 /g, the specific surface area of 802.987 m 2 /g, and the average pore diameter of 5.87 nm. Within a wide pH range from 4 to 12, GNMACs removed MB with an efficiency above 98.57 % and MO with an efficiency above 98.77 %. Additionally, the adsorption process of MB and MO onto GNMACs followed the pseudo-second-order kinetic model and the Redlich-Peterson isothermal adsorption model, with adsorption capacities of 816.04 mg/g and 286.99 mg/g, respectively. The adsorption was facilitated by hydrogen bonding, electrostatic attraction, π-π interaction, and pore filling. The results indicated the GNMACs can be used as an adsorbent to remove MB and MO from the wastewater.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2013
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IF 3.172
Ke-Ming Fang,Zhen-Zhen Wang,Ming Zhang,Ai-Jun Wang,Zi-Yan Meng,Jiu-Ju Feng
Biotemplate-assisted approach is simple and friendly to the environment. With the assistance of gelatin as a soft biotemplate and a structure-directing agent, star-like zinc oxide (ZnO) nanostructures have been prepared by assembly of well-defined nanorods under hydrothermal conditions. Their morphology and structures were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The growth mechanism of the ZnO nanostars is also investigated. The as-prepared ZnO nanostars display high photocatalytic activity toward the degradation of methyl orange (MO) under ultraviolet (UV) irradiation.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Journal of Composites Science
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2022
·Vol. 6
·期 2
·55
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IF 0
Tao Wen,Baotao Huang,Li Zhou
Activated carbon (AC) has been widely utilized for the adsorption of pollutants from water. However, it is difficult to recycle the AC after adsorption. In this paper, we report a facile one-pot approach to fabricate magnetic poly(vinyl alcohol)/AC composite gel (mPVA/AC CG) by dropwise addition of an aqueous mixture of PVA, AC and iron ions into the ammonia solution. The obtained mPVA/AC CG after freeze-drying shows porous microstructure and favorable magnetic properties. The utilization of mPVA/AC CG for adsorptive removal of methylene blue (MB) and methyl orange (MO) dyes from water was investigated. The mPVA/AC CG not only exhibited good adsorption performance for both MB and MO dyes but also could be readily recycled using a magnet after adsorption. The adsorption process was well described by the pseudo-second-order kinetic model and the Langmuir isotherm model. Considering the simple fabrication process, good adsorption performance and favorable magnetic separation capability, this work provides a viable strategy for combining the features of AC and magnetic gel for fabrication of applicable magnetic adsorbent.Keywords:magnetic gel;activated carbon;adsorption;dye;methylene blue;methyl orange
研究领域:
环境科学
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材料科学
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DOI
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2022
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IF 4.383
Xiang-Rong Ma,Xian-Yong Wei,Rui Dang,Wei Guo,Meng-Jiao Ren,Yu-Hong Kang,Xiao Li,Yong Gao,Yan-Jun Li,Jing-Jun Bai,Zhi-Pan Liu,Yu-Fei Wang,Jian Li,Zhi-Min Zong
LaCO 3 OH/Ni–Fe-LDH was synthesized as a new type of layered double hydroxides (LDHs) by complexing agent-assisted homogeneous precipitation techniques. According multiple characterizations, LaCO 3 OH/Ni–Fe-LDH has LDH phase with platelet-like particles and mesoporous properties with 141 m 2 g −1 of specific surface area. In addition, both lanthanum and iron are present in the composites, resulting in a significant decrease in the band gap to 2.04 eV, which is lower than that of either Ni–Fe-LDH (2.43 eV) or Ni–Al-LDH (4.86 eV). Compared with Ni–Fe-LDH and Ni–Al-LDH, LaCO 3 OH/Ni–Fe-LDH significantly improved photocatalytic performance and effectively decomposed methyl orange (MO) under visible light exposure. The increased photocatalytic efficiency from LaCO 3 OH/Ni–Fe-LDH is mainly ascribed to the lower band gap and higher adsorption performance. In addition, LaCO 3 OH/Ni–Fe-LDH has an interface region produced by the recombination of semiconductors with LaCO 3 OH and Ni–Fe-LDH structures, which can effectively improve the separation of photocarriers and expand the energy range of photoexcitation . Moreover, a plausible mechanism for photocatalytic decomposition of MO was presented.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
Qingling Zhang,Youliang Cheng,Changqing Fang,Jiayu Shi,Jing Chen,Hanzhi Han
In this work, we proposed a green and low-cost method to prepare novel waste cellulose/ZIF-67 composite aerogels as the adsorbent. These composites were fabricated by assembling ZIF-67 crystals into the three-dimension framework of cellulose aerogel derived from waste cigarettes. Due to the high specific surface area and electrostatic attraction, as-prepared waste cellulose/ZIF-67 aerogels had a high adsorption capacity for anionic dyes. The methyl orange was selectively adsorbed by waste cellulose/ZIF-67 compared to methyl blue . The maximum adsorption capacity for methyl orange reached to 134.36 mg g −1 . Interestingly, this adsorption capacity can maintain above 80% after 5 cycles. Thus, as-prepared waste cellulose/ZIF-67 aerogels in this paper have an important potential application in waste water treatment as a selective adsorbent.
研究领域:
环境科学
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材料科学
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高影响因子
Materials
·
2022
·Vol. 15
·期 23
·8671
·
IF 3.748
Yuan Li,Xirong Lin,Zhanpeng Li,Jinyun Liu
A composite composing of TiO2nanoparticles load on biomass rice husk (RH) is developed by directly growing TiO2nanoparticles on RH. The in-situ growth of the nanocrystals on RH is achieved by a low-cost and one-step homogeneous precipitation. Rapid hydrolysis proceeds at 90 °C by using ammonium fluotitanate and urea to facilitate the selective growth of TiO2. The method provides an easy access to the TiO2-RH composite with a strong interaction between TiO2nanoparticles and the underlying RH. The structure and composition of TiO2-RH are characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and UV-vis absorption spectroscopy. TiO2nanoparticles-RH exhibits a good photocatalytic degradation of methyl orange. The results show that 92% of methyl orange (20 mg L−1) can be degraded within three hours in visible light. The catalytic activity of the composite is not reduced after 6 cycles, and it still reaches 81% after 6 cycles. The enhanced performance is ascribed to the suitable particle size the good dispersibility. It is expected that the high photocatalytical performance and the cost-effective composite presented here will inspire the development of other high-performance photocatalysts.Keywords:TiO2;rice husk;photodegradation;methyl orange;ecological restoration
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 PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
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IF 4.3
Luyao Shen,Faqiang Guo,Yundong Hang,Jingming Yang,Zhifen Guo,Wenhui Liang,Pan Du,Wenmei Jiao
Water resources contaminated by industrial dyes can pose a significant threat to the environment and human health. Herein, we conducted a study on the removal of cationic and anionic dyes, such as methylene blue (MB) and methyl orange (MO), using MIL-140A, a zirconium-based metal-organic framework. MIL-140A is synthesized in a Schlenk flask at 120 °C, whereas its conventional synthesis route involves a teflon-sealed autoclave at 220 °C, highlighting the cost reduction and lower equipment requirements of the low-temperature synthesis. The structure of MIL-140A is characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscope (SEM), and nitrogen adsorption techniques. The optimal pH for the adsorption of two dyes by MIL-140A is pH 5–8 for MB and pH 3 for MO. The adsorption equilibrium can be reached within 60 min at room temperature, and the adsorption of both dyes on MIL-140A follows pseudo-second-order kinetics and Langmuir isotherm, and the maximum adsorption capacity of MO and MB by MIL-140A were 163.6 and 89.2 mg/g, respectively. Thermodynamic studies indicate an entropy-driven spontaneous process. The adsorption mechanism of MO and MB on MIL-140A is investigated using FT-IR and X-ray photoelectron spectroscopy. The adsorption of MO involves coordination between Zr and sulfonate, while MB adsorption occurs via π-π interactions. Additionally, MIL-140A exhibits better removal efficiency for MO from lithium battery wastewater compared to MB, primarily due to stronger coordination interactions than π-π interactions. These findings demonstrate that MIL-140A is a promising adsorbent for effectively removing both anionic and cationic dyes from water resources.
研究领域:
环境科学
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材料科学
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高影响因子
ACS Applied Nano Materials
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2019
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IF 0
Ruotong Zhao,Xiaotian Yu,Dayin Sun,Liyan Huang,Fuxin Liang,Zhengping Liu
Snowman-like silica@PDVB/PS Janus particles were fabricated via seeded emulsion polymerization and modified with hydrophilic ionic liquid moieties. The Janus particles can readily be further modified by incorporating new functionalities through simple anion exchange. PW12O403– as a catalytically active species for dye degradation was introduced into the Janus particles, and the performance in the catalytic degradation of methyl orange was evaluated.
研究领域:
材料科学
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环境科学
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DOI
危险品化学品经营许可证（带存储）