DESALINATION
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2024
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IF 8.3
Hua Qiang,Mingxing Shi,Keren Lu,Fengyun Wang,Mingzhu Xia
Mesoporous carbon materials hold significant potential in capacitive deionization (CDI) technology owing to expansive accessible surface area, more adaptable pore structure, excellent conductivity properties and effective surface modification and functionalization. While templating is a common method for synthesizing mesoporous carbons, the commonly used hard and soft templating approaches among them suffer from the challenges of expensive precursors and templating agents, complex procedures, secondary contaminants and difficulties in template removal. In contrast, the self-templating method not only circumvents the traditional template removal or combustion steps but also eliminates the use of organic solvents and hazardous chemicals, thus minimizing environmental impact. In this paper, we have successfully synthesized phosphorus-doped mesoporous carbon with a large average pore size (p aver ) using a green and convenient self-templating method employing dual sodium salts of sodium alginate (SA) and sodium phytate (SP). Compared to single SA (6.76 nm) or SP (3.74 nm) self-templated carbonization, the average pore size of carbon materials obtained from dual self-templated carbonization with a proportional mixture (12.97 nm) is significantly improved. The larger average pore size provides a greater surface area for electrode-electrolyte interactions, allowing for easier access and faster diffusion of ions into the pores, thereby enhancing the electrochemical and capacitive deionization properties of the material. The resulting material demonstrates promising electrochemical and desalination performance as evidenced by possessing a specific capacitance of 175.8 A/g and an adsorption capacity of 19.65 mg/g, underlining its potential for application in capacitive deionization utilizing mesoporous carbon materials with large average pore size.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 31
·e55738
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IF 2.7
Liangyong He,Yuqing Yang,Bin Yang,Weiqiang Hu,Zhengzhi Zheng,Tianyu Lu,Haijia He,Jiasheng Qian,Yaoyang Chen,Weiguo Zhang,Yuchao Ke
In recent years, optical diffusion film materials with high transmittance and high haze have been widely reported, while there is relatively rare research on their functionalization and practical application especially in real scenario. In this work, optical diffusion films using polymethyl methacrylate (PMMA)@TiO 2 @SiO 2 (P@T@S) composite microspheres were fabricated, which exhibited sufficiently high light transmittance and haze. The binding mode of PMMA microspheres and nanoparticles suggested that PMMA microspheres with a positive surface potential combined with nanoparticles with a negative surface potential through electrostatic attraction to achieve mutual binding. The prepared P@T@S composite microspheres showed better heat and swelling resistance than those of PMMA microspheres. The P@T@S diffusion film, whose excellent light diffusion effect was clearly demonstrated, exhibited the best optical performance among all optical diffusion films prepared. After passing through the P@T@S diffusion film, the laser light was not only uniform but also bright. The findings from this work can provide some insight into further research on optical diffusion films applied in optoelectronic device areas.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Shandi Zhong,Cai Xu,Quanfu Long,Hang Zhou,Jianhai Yang,Jia Guo,Xiaozhong Wang,Liyan Dai
Using O 2 as an oxidant, developing a non-noble metal catalyst for the selective catalytic C–H bond oxidation of p-chlorotoluene is desirable and challenging. In this work, a series of Co, Cr co-doped OMS-2 (Octahedral Molecular Sieve-2) catalysts were prepared by a conventional refluxing method. It was found that the incorporation of Co and Cr improved the catalytic activity for the selective oxidation of p-chlorotoluene to p-chlorobenzaldehyde. Among these catalysts, CoCr/OMS-2 (Co: Cr = 1: 1, mass ratio), the best catalyst, shows that the conversion and the selectivity of p-chlorobenzaldehyde is 94.8 % and 94.3 %, respectively. The enhanced catalytic activity was due to the larger specific surface area and even dispersion of active components. The characterization results also disclosed that the co-doping of Co and Cr increased the oxygen vacancy and enhanced the ability to activate the surface lattice oxygen. Additionally, density functional theory calculations demonstrated that co-doping of Co and Cr promoted the adsorption of p-chlorotoluene and O 2 , and decreased the energy barrier of rate-determining step (the conversion of p-chlorobenzyl alcohol to p-chlorobenzaldehyde). Besides, when H 2 O was added to the reaction system as the second solvent, the activation and dissociation of O 2 , and the formation of p-chlorobenzaldehyde were facilitated, in agreement with the experimental results. This work demonstrated the promotional effect of Co, Cr co-doped into OMS-2 catalyst and the role of H 2 O for the selective oxidation of p-chlorotoluene.
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CHEMOSPHERE
·
2024
·
IF 8.1
Shan Yang,Xinyue Li,Yifang Liao,Yibing Ji,Ruijun Li
The large use and emission of p -nitrophenol (p-NP) seriously pollute the environment and endanger human health. In this work, a hydrazone-linked fluorescent covalent organic framework (BATHz-COF) was simply synthesized at room temperature and covalently linked N-acetyl-L-cysteine (NALC) via the "thiol-ene" click reaction, where carboxyl groups were introduced to improve dispersion and fluorescence intensity . As a rapid, good selectivity and reusability fluorescence sensor, the obtained COF-NALC has been used for quantitative analysis of p-NP predicated on the internal filtering effect (IFE). Under optimal conditions, COF-NALC enabled quantitative detection of p-NP with a linear range of 5–50 μM and the detection limit was 1.46 μM. The application of COF-NALC to the detection of p-NP in river water samples was successful, and the satisfactory recoveries were 98.0%–109.3%. Furthermore, the fluorescent COF paper chips constructed by in situ growth were combined with a smartphone to build a visual platform for the quick and real-time detection of p-NP, providing an excellent illustration for the development of intelligent fluorescence sensing in environmental analysis .
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Yining Bao,Qingru Zeng,Shunyan Ning,Wei Zhao,Longfei Wang,Xinpeng Wang,Yuezhou Wei,Deqian Zeng
Developing effective heterojunction photocatalysts that efficiently separate charge carriers and improve light-harvesting capabilities is crucial in addressing energy and environmental issues. Herein, a unique nanocomposite photocatalyst is constructed by attaching CoMn 2 O 4 nanoparticles onto 2D CdS nanosheets for H 2 production and U(VI) reduction. The optimized 2% CoMn 2 O 4 /CdS nanocomposite showcases the highest photocatalytic H 2 production efficiency, 5.8 times higher than CdS nanosheets . Additionally, the U(VI) reduction rate constant of 2% CoMn 2 O 4 /CdS is 0.0192 min −1 , approximately 1.9 folds over the pristine CdS (0.0101 min −1 ). The exceptional photocatalytic performance toward photocatalytic H 2 evolution and U(VI) reduction reactions directly result from the electronic integration between CoMn 2 O 4 /CdS p-n heterojunction, facilitated by the efficient photoexcited charge separation. Feasible photocatalytic mechanisms are proposed through experimental analyses and theoretical calculations. This study provides a straightforward method for designing effective CdS-based heterostructured photocatalysts, contributing to the advancement of solar-to-H 2 conversion and environmental abetment.
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JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2024
·
IF 2.8
Peng Wang,Qiuliang Xu,Hua Zou,Ming Liu,Xiangjing Gao,Hong Ren,Junlin Wang,Yiyao Cao
Accurate, reliable, and sensitive methods for the determination of eight metabolites of p-chloronitrobenzene (p-CNB) were developed based on ultra-performance liquid chromatography − quadrupole − orbitrap high resolution mass spectrometry (UPLC-Q-Orbitrap HRMS). The free and conjugated forms of metabolites were determined before and after urine samples were hydrolyzed with acid. Subsequently, three solid phase extraction steps were used for concentration and purification. The calibration curves of the eight metabolites exhibited good linearity with an R 2 of >0.999, and the precision was good as well, with the coefficient of variations of intra-day and inter-day being lower than 7.0 % and 8.5 %, respectively. Analytical accuracy for all metabolites varied within ranges of 76.0–102.9 %, and the limit of detection and limit of quantification of all the metabolites varied within ranges of 0.2–7.7 μg/L and 0.6–25.6 μg/L in human urine, respectively. In addition, the application potential of the proposed methods were evaluated by applying them to the determination of metabolites in the urine of workers exposed to p-CNB, and these results showed that these methods were accurate, reliable, and sensitive, which makes them an excellent choice for detecting the metabolites of p-CNB in the urine of exposed workers.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jialin Li,Yu Wang,Ye Zhang,Wei Zhao,Wenzhe Bao,Yufeifan Duan,Junwei Yu,Bo Zhu,Kun Qiao
Currently, the hydrogen storage application of carbon-based adsorbent materials is mostly implemented under the pressure conditions of 30–300 bar, while there is few targeted studies conducted on the unsaturated adsorption under ambient pressure conditions. Therefore, based on industrialized Lyocell biopolymer fiber precursors and the enhancement effects of dipole-induced hydrogen bonds (DIHB), this work presents a facile construction strategy for P/O co-doped Lyocell-based porous carbon fiber cloth (Ly-ACF-F40). By the technical route of thermal stabilization---sonication assisted phosphoric acid activation---hydrogen bonds introduced by interfacial fluorination, the constructed Ly-ACF-F40 acquires a high specific surface area (1870 m 2 /g) and total pore volume (1.277 cm 3 /g), and an excellent hydrogen storage capacity of 3.22 wt% under ambient pressure conditions (77 K, 1 bar). The study directly demonstrated in the experiment that dipole induced hydrogen bonding H(I)-H(II)···F can effectively enhance the atmospheric hydrogen storage density on the basis of other eliminating influencing factors of specific surface area. The simple construction strategy of porous carbon-based materials can provide reference for the research of unsaturated adsorption hydrogen storage materials under ambient pressure conditions, also assist in the application and promotion of low-cost solid hydrogen storage materials.
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CHEMOSPHERE
·
2024
·
IF 8.1
Feng Yao,Yaowen Du,Yuxiang Wang,Luhan Wang,Ruiyu Zhu,Chenggang Cai,Suqin Shao,Ting Zhou
Deoxynivalenol (DON) is one of the mostly concerned mycotoxins and several microbes showed bioremediation effects on DON toxic effects. In this study, the acute toxicity of a new DON degrading strain Achromobacter spanius P-9 with DON on zebrafish embryos and adults were firstly performed. For zebrafish embryos, bacterial concentrations of 2.5 × 10 7 CFU/mL and 5.0 × 10 7 CFU/mL had no significant effects on growth and development. However, at 7.5 × 10 7 CFU/mL, some effects were observed, and at 10.0 × 10 7 CFU/mL, the embryo survival rate decreased to 70%, with 3.3% teratogenicity. Higher bacterial concentrations correlated with faster heart rates. DON (100 μg/mL) significantly reduced embryo survival to 36.7% in 96 h. Bacterial solutions at 7.5 × 10 7 CFU/mL and 10.0 × 10 7 CFU/mL expanded the zebrafish intestinal tissue wall, while DON at 100 μg/mL negatively impacted intestinal morphology. Liver tissue in zebrafish exposed to Achromobacter spanius P-9 showed no significant differences from the control group. However, exposure to DON solution increased liver fluorescence intensity and caused liver cell changes, including edema, vacuolization, and blurred boundaries. For adult zebrafish, the ROS and 8-OHdG contents in the exposure group increased with the increase of bacterial solution concentration, the SOD enzyme activity, CAT enzyme activity, GST enzyme activity and MDA was not significantly different with the control group. Compared with the control group, the content of ROS, GST enzyme activity, MDA and 8-OHdG after DON treatment showed an upward trend, SOD and CAT enzyme activities showed a decreasing trend. Achromobacter spanius P-9 has no obvious inhibitory effect on the growth and development of zebrafish embryos and has no obvious death and toxicity during the growth of adult fish, providing data support for the future application of this strain in the biodegradation of DON.
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JOURNAL OF FLUORESCENCE
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2024
·
IF 2.6
Li Qianwen,Yin Yu,Wang Wenjuan,Liu Bin,Tong Wei,Zhang Xu,Liu Jinquan,Yang Shengyuan
Herein, a visual and luminescent dual-mode (colorimetric and fluorometric) method for the detection of P-phenylenediamine (PPD) in hair dye was successfully established based on cerium-nitrogen co-doped carbon dots (Ce, N-CDs) that displayed remarkable luminescence and peroxidase activity. Ce, N-CDs catalyzed H 2 O 2 to produce superoxide anion, which then oxidized the colorless 3,3,5,5-tetramethylbenzidine (TMB) into blue oxidized TMB (oxTMB), capable of quenching the fluorescence through fluorescence resonance energy transfer (FRET) between Ce, N-CDs and oxTMB. The reducing properties of PPD could reduce oxTMB back to TMB, leading to a decrease in the absorption intensity of oxTMB and a fluorescence recovery of Ce, N-CDs. As a result, the quantitative detection of PPD could be achieved by measuring the absorption values of oxTMB and the fluorescence signal of Ce, N-CDs. The detection limits for PPD were calculated as 0.36 µM and 0.10 µM for colorimetry and fluorimetry, respectively. Furthermore, smartphone application (ColorPicker) capable of measuring the RGB value of the color was utilized in the detection system, facilitating on-site quantitative detection. This approach effectively shortens the detection time and simplifies the operation, offering a powerful and convenient tool for real-time monitoring of PPD.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qianfeng Wu,Binbin Tan,Jiang Wang,Zhihao Zhang,Jing Wang,Junlong Liu,Yao Deng,Huidi Zhang,Ting Yang,Wenlei Wang
The utilization of a low-cost common waste biomass, mugwort, with a porous structure is important for the treatment of Arsenic (III) pollution in the aquatic environment. In this study, mugwort straw was first delignified to expose more hydroxyl groups, then loaded with MnOOH and α − FeOOH and constructed with p − n heterojunctions on cellulosic biochar microinterfaces. The successful formation of p − n heterojunction effectively enhances the electric field enhancement inside the photocatalyst, promotes charge transfer and suppresses the recombination of photogenerated carriers. Application of high-energy electron beam irradiation of FMBC−LR2 to modulate the generation and dominant mechanism of Fe and Mn in the reaction system. The results showed that Mn 3+ underwent disproportionation reaction to form Mn 2+ and Mn 4+ . Among them, Mn 2+ led to the formation of MnFe 2 O 4 , while Mn 4+ exhibited stronger oxidizing properties that could promote the transformation of Fe 2+ to Fe 3+ , thus allowing more Fe 3+ to participate in the photocatalytic oxidation of As(III) in a synergistic manner. As(III) oxidation efficiency increased 9.18 times after delignification treatment (FMBC−LR2) and 12.31 times after high-energy electron beam irradiation (FMBC−LR2 − 650) as compared to mugwort straw biochar (BC). In addition, the EPR assay results indicated that ·O 2 − , ·OH, and 1 O 2 acted together in the As(III) reaction. This provides new insights into the remediation of composite modified biochar in water bodies and a new environmentally friendly strategy for the comprehensive utilization of straw materials.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Dingfeng Yang,Hongzheng Pu,Peng Dai,Wen Jiang,Yuanxue Yi,Tao Zhang,Shuming Zhang,Xichuan Guo,Yuanyuan Li
A systematic evaluation of enhancing photocatalysis via aliovalent cation doping is conducted. Cation In3+, being p-type-doped, was chosen to substitute the Sn site (Sn4+) in Li2SnO3, and the photodegradation of 2,4-dichlorophenol was applied as a model reaction. Specifically, Li2Sn0.90In0.10O3 exhibited superior catalytic performance; the photodegradation efficiency reached about 100% within only 12 min. This efficiency is far greater than that of pure Li2SnO3 under identical conditions. Density functional theory calculations reveal that introducing In3+ increased the electron mobility, yet decreased the hole mobility, leading to photogenerated carrier separation. However, photoluminescence and time-resolved photoluminescence suggest that In3+ induced nonradiative coupling in the matrix, reducing the photogenerated carrier separation ratio compared with that of Li2SnO3. The optical band gap of Li2Sn0.90In0.10O3 was almost unchanged compared with that of Li2SnO3 via ultraviolet–visible absorption. The increased photocatalytic efficiency was ascribed to the lower valence band position and enhanced hole concentrations by valence band X-ray photoelectron spectroscopy and electrochemical measurements. Finally, a 2,4-dichlorophenol degradation pathway, an intermediate toxicity assessment, and a photocatalytic mechanism were proposed. This work offers insights into designing and optimizing semiconductor photocatalysts with high performance.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yan Huang,Daixin Ye,Jing Yang,Huan Lu,Li Li,Yaping Ding
Herein, based on the dual-signal strategy, an electrochemical sensor with molecularly imprinted polymer (MIP) was designed for the analysis of p-Hydroxyacetophenone (p-HAP) for the first time. The sensor was fabricated by modifying the electrode with NiFe prussian blue analogue (NiFe-PBA) and followed by SnS 2 , obtaining the dual-signal from [Fe(CN) 6 ] 3−/4− at 0.20 V and NiFe-PBA at 0.52 V. In the electropolymerization of the MIP film, o-phenylenediamine was used as functional monomer and p-HAP acted as template molecule. After the adsorption of p-HAP, the two above oxidation peak currents decreased simultaneously compared with the elution, achieving the dual-signal analysis. Under the optimal conditions, the sensor exhibited a wide linear range of 10 −13 M to 10 −7 M and a low detection limit of 3.52 × 10 −14 M (3σ). Moreover, it was successfully applied to the p-HAP detection in human serum and environment water samples with satisfactory recovery.
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