CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2017
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IF 1.174
Jianhua Chen,Xue Sun,Lijing Lin,Xinfei Dong,Yasan He
In the present paper, a metal–organic framework Cr-BDC was prepared and used as adsorbent for adsorption of o -nitrophenol (ONP) and p -nitrophenol (PNP) from aqueous solutions. Cr-BDC was characterized by scanning electron microscopy, transmission electron microscope, X-ray diffraction and BET methods. The results indicate that Cr-BDC gets a very large specific surface area of 4128 m 2 ·g − 1 and pore sizes are concentrated in 1 nm, which is a benefit for using for wastewater treatment . The influences of the adsorption conditions, such as temperature, solution concentration, adsorption time and reusability on adsorption performance were investigated. Cr-BDC exhibited an encouraging uptake capacity of 310.0 mg·g − 1 for ONP, and adsorption capacity of Cr-BDC for ONP is significantly higher than that for PNP under suitable adsorption conditions. The characterizations of adsorption process were examined with the Lagergren pseudo-first-order, the pseudo-second-order kinetic model, and the intra-particular diffusion model. Kinetics experiments indicated that the pseudo-second-order model displayed the best correlation with adsorption kinetics data. Furthermore, our adsorption equilibrium data could be better described by the Freundlich equation. The results indicate that the as-prepared Cr-BDC is promising for use as an effective and economical adsorbent for ONP removal.
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
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2020
·
IF 4.872
Sijie Wei,Jun Cao,Xinyue Ma,Jie Ping,Chao Zhang,Tan Ke,Yurui Zhang,Yue Tao,Lanzhou Chen
Microalgae have been used for the removal of heavy metals or synthetic organics; however, the simultaneous removal of both types of compounds is always technically difficult. In this study, a green algae , Chlamydomonas reinhardtii , was first used to simultaneously remove hexavalent chromium [Cr(VI)] and o-nitrophenol (ONP), and the balance among biomass, oxidative damage and removal rate was also investigated. The results showed that treatment with Cr(VI) or ONP decreased the photosynthetic and superoxide dismutase activities and increased the production of reactive oxygen species (ROS) and malondialdehyde content. However, combined treatment with Cr(VI) (≤4 mg/L) and ONP (≤15 mg/L) significantly decreased ROS generation and alleviated cell damage in C. reinhardtii . In addition, the removal rates of Cr(VI) and ONP by C. reinhardtii cells significantly increased from 37.4% to 54.9% and from 35.8% to 45.9%, respectively, and the cells could be reused at least four times. Moreover, the increased acidity in the medium and Cr(VI) reductase content in C. reinhardtii caused Cr(VI) to be reduced to Cr(III). The addition of an exogenous antioxidant decreased the removal rates of Cr(VI) and ONP. These results indicated that the presence of Cr(VI) could induce ROS generation in C. reinhardtii and enhance ONP degradation, which consumed ROS, alleviated cell damage, and thus benefited Cr(VI) reduction. As a result, C. reinhardtii could be used as a theoretical candidate for the simultaneous removal of combined Cr(VI) and ONP contamination.
研究领域:
环境科学
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微生物学
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DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-14
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IF 3.8
Omer Ahmed M.,Eltaweil Abdelazeem S.,Abdelhamed Aly M.,Abd El-Monaem Eman M.,El-Subruiti Gehan M.
Worldwide industrialization has grown at a rapid pace, contaminating water resources, particularly with phenolic pollutants that pose a risk to aquatic systems and human health. The goal of this study is to create an inexpensive magnetic composite that can effectively remove nitrophenol (o-NP) using adsorptive means. In this instance, a nonanyl chitosan (N-Cs) derivative was synthesized and then combined with activated petroleum coke (AP-coke) and magnetic Fe 3 O 4 to boost its adsorbability towards o-NP and to facilitate its separation. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffractometer (XRD), Vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), and zeta potential were employed to characterize the magnetic composite. The experimental results indicated that the Fe 3 O 4 /AP-coke/N-Cs composite possesses a greater affinity toward o-NP with a maximal efficiency reached 88% compared to 22.8, 31.2, and 45.8% for Fe 3 O 4 , AP-coke and N-Cs, respectively. The equilibrium adsorption data coincided with the Langmuir, Freundlich, and Temkin isotherm models, with a maximum adsorption capacity of 291.55 mg/g at pH 6, whereas the pseudo second order kinetic model offered the best fit to the experimental data. Besides, the developed adsorbent preserved satisfactory adsorption characteristics after reuse for five successive cycles. The proposed adsorption mechanism involves the H-bonding, π-π interaction, hydrophobic interactions and electron donor-acceptor interactions. These findings hypothesize that the constructed magnetic composite could efficiently remove nitrophenols from polluted water with high performance and ease-separation.
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
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Xiaoxian Hu,Sina Xiong,Juan Yang,Lei Ye,Yuanyuan Zhang,Ting Zeng,Nianjun Yang
Covalent organic frameworks (COFs) have aroused much attention as candidate materials for constructing electrochemical sensors. However, their inherent low conductivities have limited their sensing applications. Here, a novel COF/carbon nanotubes (CNTs) composite is prepared via a straightforward ultrasonic method, incorporating amino-functionalized CNTs (NH 2 -CNTs) into COF composed of 1, 3, 5-benzenetricarboxaldehyde and 1,4-diaminobenzene. The resulting COF/NH 2 -CNTs composite exhibits high specific surface area, improved conductivity, fast electron transfer capability due to the high porosity of COF, the introduction of NH 2 -CNTs, and the conjugate interaction between CNTs and COF. The proposed COF/NH 2 -CNTs-based sensor offers an amplified current toward the electrochemical sensing of o-nitrophenol (o-NP). Notably, the sensor exhibits a wide linear detection range (0.1–100 and 100–1000 μM), a high sensitivity (8.66 and 1.44 μA/(μM cm 2 )), and a very low detection limit (0.03 μM). Moreover, it is successfully applicable in the quantitative analysis of o-NP in lake water samples with satisfactory recoveries (97.0–105.3 %). This work not only demonstrates the viability of COF-based sensors for the trace-level detection of nitrobenzene contaminants but also enriches the variety of COF-based sensing materials.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Feng Zhu,Kang Wang,Tongmou Geng
A first hexaphenylsilole-based conjugated microporous polymer, termed THPS, was prepared by a Friedel-Crafts arylation reaction of 1,1,2,3,4,5-hexabenylthirole with 2,4,6-trichloro-1,3,5-triazine catalyzed by anhydrous aluminium trichloride (AlCl 3 ) in 1,2-dichloroethane. Its Brunauer–Emmett–Teller and Langmuir surface area reached up to 1579 and 2081 m 2 g −1 , and total pore volume and micropore pore volume were severally 0.8325 and 0.7322 cm 3 g −1 . THPS could fluorescence-sense o- nitrophenol with high sensitivity and selectivity. Its fluorescence quenching constant (K SV ) and limits of detection (LODs) were severally 8.32 × 10 3 L mol −1 and 3.61 × 10 -10 mol L −1 . The fluorescence quenching of THPS by o- nitrophenol was originated from the combined action of both photo-induced electron transfer mechanism and resonance energy transfer mechanism.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Zhang Qianchun,Liang Junyi,Zhao Li,Wang Yan,Zheng Yuguo,Wu Yun,Jiang Li
A novel carbon quantum dots (CQDs) were successfully synthesized by one-step hydrothermal reaction using Rosa roxburghii as a biomass-based precursor. The CQDs have an average size of 2.5 nm and a narrow size distribution. They display strong blue fluorescence with a quantum yield of 24.8% and good biocompatibility. Notably, these CQDs were capable of detecting trace o-nitrophenol in surface water and sewage with high sensitivity and specificity. The linear range is 0.08–40 μmol/L, and the limit of detection is 15.2 nmol/L. Furthermore, this CQDs was successfully applied for o-nitrophenol analysis in river water and sewage samples. Additionally, Hep3B cells, a human hepatocellular carcinoma cell line, can be easily imaged with high resolution using the as-prepared CQDs as nanoprobes. These results reveal that the as-prepared CQDs have potential applications for detecting o-nitrophenol and cell imaging.
研究领域:
材料科学
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环境科学
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分析化学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2025
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IF 2.6
Zuhang Ding,Jianzheng Wang,Jing Jin,Min-jie Guo,Qinran Li,Zhi Fan,Jin Zhao
This research describes a novel electrochemical sensor based on a polyimide-silver nanowire (PI-AgNWs) composite that is used to modify a glassy carbon electrode (GCE) for the simultaneous detection of multiple nitrophenol isomers (NPs) with high performance. The synergistic effect from polyimide (PI) doped silver nanowires (AgNWs) improved the selectivity and sensitivity of the fabricated sensor. First, the AgNWs was prepared by polyol process, and then composited with PI to obtain the target composite. Subsequently, the composite was characterized in detail and was used to modify GCE for the NPs detection. Afterwards, electrochemical measurements were performed to simultaneous detection for three NPs. Under the optimal condition, the results exhibited that the linear detection range of 1-400 μM for 4-nitrophenol (4-NP), 1-350 μM for both 2-nitrophenol (2-NP) and 3-nitrophenol (3-NP) and the limit of detection (LOD) were 0.081 μM for 2-NP, 0.107 μM for 3-NP, and 0.063 μM for 4-NP, respectively. In addition, the fabricated electrode exhibited excellent reproducibility (RSDs of 2.85% for 2-NP, 2.71% for 3-NP, and 1.80% for 4-NP, respectively) and stability (RSDs of 6.17% for 2-NP, 2.36% for 3-NP, and 3.89% for 4-NP, respectively) over multiple measurements. Moreover, the sensor showed excellent anti-interference capability and was successfully applied to detect NPs analytes in real water samples with recoveries ranging from 91.1% to 109.0%. This study emphasizes the potential application of PI-AgNWs composites for the rapid detection of NPs in the environment.
研究领域:
分析化学
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环境监测
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纳米材料
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电化学传感
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污染物检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2019
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IF 1.163
Tongmou Geng,Guofeng Chen,Can Zhang,Lanzhen Ma,Weiyong Zhang,Hongyu Xia
A mesoporous covalent triazine framework, PCPDI, was synthesized via an aromatic nitrile trimerization reaction of N,N′-di(4-cyanphenyl)- 3,4,9,10-tetracarboxydiimide (CPDI) by CF3SO3H catalyzed at 40 °C and this method avoids the use of noble metal catalyzers or high temperature reaction. PCPDI exhibits high thermal stability and strong fluorescence. The PCPDI shows ultrahigh sensitivity to tracing o-nitrophenol in chloroform with KSV constant of 1.74 × 105 L mol−1 and detection limit (LOD) of 1.72 × 10−11 mol L−1.
研究领域:
材料化学
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分析化学
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有机功能材料
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荧光传感
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环境监测
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Dingliang Dai,Jianhao Qiu,Guanglu Xia,Yong Tang,Qiying Liu,Yixin Li,Biyao Fang,Jianfeng Yao
Metal-organic framework derived materials received a lot of attention due to their significant benefits in photocatalytic reactions. In this work, a Z-scheme ZnIn 2 S 4 /Bi 2 S 3 hierarchical heterojunction is first developed by a one-pot method using CAU-17 as a template. The specific preparation method endows an intimate interface contact between these two monomers, and CAU-17-derived Bi 2 S 3 possesses a high surface area and porosity, resulting in an efficient charge separation and O 2 capture. Thus, for photocatalytic H 2 O 2 production from the O 2 reduction reaction, the ZnIn 2 S 4 /Bi 2 S 3 heterojunction can achieve an H 2 O 2 yield of 995 µmol L −1 in pure water and ambient air under visible light, 4.5 and 4 times that of ZnIn 2 S 4 and Bi 2 S 3 , respectively. In addition, in tetracycline solution, ZnIn 2 S 4 /Bi 2 S 3 can degrade tetracycline with a degradation rate of 95% by photocatalysis, and at the same time, a final H 2 O 2 production yield of 1223 µmol L −1 is reached. Similarly, high yields of H 2 O 2 are also obtained from wastewater containing o -nitrophenol, acid golden yellow, or acid red, and these pollutants are effectively degraded. This work reveals the potential of metal-organic framework-derived materials in photocatalysis, as well as provides insights into H 2 O 2 green synthesis and wastewater treatment.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Yifan Liu,Yan Luo,Mingliang Li,Lixia Yang
A novel Bi 2 MoO 6 (BMO) modified g-C 3 N 4 heterostructure composite photocatalyst (g-C 3 N 4 /BMO) was prepared by hydrothermal method . The orthorhombic crystal phase of the material was studied by the X-ray diffraction assay (XRD). The microscopic morphology of the material was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), indicating a heterojunction structure of the composite. The electrons and holes separation was evaluated by photo-luminescence (PL) and photocurrent measurements. The removal rate of O-Nitrophenol was as high as 97.3% over the catalyst with the optimal ratio of 1: 0.09 (BMO:g-C 3 N 4 ) in 180 min. COD removal percentage of actual pharmaceutical wastewater was as high as 71.40%. The active species in the photocatalytic system were studied, indicating superoxide radicals ( · O 2 - ) and holes (h + ) as the main active species.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 9
·5108-5115
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IF 3.119
Chen Hu,Ying-Chun Gao,Can Zhang,Min Liu,Tong-Mou Geng
In this study, two fluorescence conjugated microporous polymers based on perylene tetraanhydride bisimide (DP4A0 and DP4A2) were prepared via Sonogashira–Hagihara cross-coupling polymerization for the efficient detection of o-nitrophenol (o-NP). They were well characterized via FT-IR, solid state 13C NMR, elemental analysis, and other material characterization techniques. The experiments proved that both CMPs possess high thermal and chemical stability and a porous nature with Brunauer–Emmett–Teller (BET) specific surface areas of 41.3 and 402.1 m2 g−1. Importantly, owing to signal amplification by the conjugated skeleton, DP4A0 and DP4A2 exhibit extremely high sensitivity to o-NP with Ksv values of 1.83 × 104 and 1.69 × 104 L mol−1 and limits of detection of 5.73 × 10−9 and 7.36 × 10−9 mol L−1, respectively. The sensing performance of DP4A0 and DP4A2 was dependent on the position of crosslinking points and crosslinking density. Finally, super amplified quenching was considered the electron transfer mechanism and hydrogen bond interactions were also present.
研究领域:
材料科学
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分析化学
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高分子化学
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环境传感
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xianghan Cheng,Yalin Liu,Man Yang,Xiaoli Wang,Aili Wang,Zhen Li,Zhongmin Liu,Yong-Zheng Zhang,Xiuling Zhang,Da-Shuai Zhang,Shujuan Zhuang,Longlong Geng
Developing metal oxide catalysts with comparable activity to precious metals has become a hot but challenging area of research for wastewater purification. Herein, CoO x particles and nitrogen co-doped carbon with a hierarchical structure were designed and synthesized via a temperature-controlled pyrolysis strategy using inert Co-based metal–organic frameworks (Co-MOFs) as precursors. Unlike traditional methods, the exquisite pyrolysis of the Co-MOF at 400 °C enabling the CoO x particles with an average diameter of 6.8 nm to uniformly disperse, thus facilitating the formation of the optimized CoO x /CN-400 composite. Benefiting from the unique morphology and composition, CoO x /CN-400 exhibited improved redox property and exceptional activity for the reduction of nitrophenol to form the corresponding aminophenol compounds. The complete conversion of 4-nitrophenol over CoO x /CN-400 requires only 35 min with a rate constant of 0.12 min −1 , which is significantly higher than that of most non-noble metal catalysts and approaching some of the noble metal-based catalysts. Furthermore, leveraging the embedded CoO x particles, CoO x /CN-400 maintains its high catalytic efficiency even after six successive cycles, demonstrates an outstanding long-term catalytic capability and reusability. Finally, the mechanisms of 4-NP reduction have been hypothesized based on the combination of characterization and DTF calculations.
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）