NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 43
·20699-20710
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IF 3.925
Die Wang,Luminita Marin,Xinjian Cheng
Nitro compounds are widely used in modern industries. Among them, 2, 4-dinitrophenylhydrazine (DNH) is extremely harmful. It is of great significance to develop methods for the detection of DNH. In this work, chitosan was used as the substrate material, and fluoroborondipyrrole (BODIPY) was used as the fluorophore. Chitosan was endowed with the fluorescence sensing ability by the introduction of BODIPY units. First, BODIPY derivatives (NO-3 and BO-1) with an alkynyl group (CC) were synthesized. Second, small molecules NO-4 and BO-2 with an aldehyde group (–CHO) were obtained. Finally, the –NH2 groups on chitosan underwent a click reaction (–NH2/CC) and a Schiff base formation reaction occurred (–NH2/–CHO) to form three polymer probes C1, C2 and C3. CC formed in the click reaction can interact with DNH and can be used as recognizing sites for DNH. These chitosan probes have good thermal stability and could selectively recognize DNH, showing notable fluorescence quenching effects, which are visible to the naked eye. DNH is a typical electron-deficient compound, and the polymer fluorescent probe contains electron-rich groups, which makes it easier for the two species to combine and cause fluorescence changes. C1 is flexibly cross-linked, C3 is rigidly cross-linked, and C2 has a non-crosslinked structure, and they show different rheological properties. This work expands the application of chitosan.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2022
·
IF 10.753
Qilu Cheng,Linna Du,Ligen Xu,Yuhua Zhao,Junwei Ma,Hui Lin
Nonylphenol (NP) toxicity limits the improvements in its algal remediation efficiency. This study comprehensively investigated the performance and mechanism of NaHCO 3 -driving effects on NP-exposed algae. The results showed that NaHCO 3 enhanced algal resistance to NP and the corresponding EC 50 values increased 1.31–4.25 times. Further, the toxicological effects of NP reduced with increasing pyrenoid volume and chlorophyll and carotenoids production, and decreasing cellular damage degree. Moreover, the concentration of extracellular polymeric substances was enhanced and more NP adsorption sites were formed. Consistently, RNA-seq demonstrated significant expression alterations in genes related to energy metabolism, cellular synthesis, photosynthesis, and carbon fixation. Besides, NP biodegradation rate was increased by 15.2 % and 11.1 % in the 1, and 4 mg/L NP treatments, respectively. Identification of degradation intermediates and their toxicity via Ecological Structure Activity Relationship program showed that NaHCO 3 accelerated sequential α-C removal from NP in algae with faster generation of less toxic metabolites, namely, 4-ethylphenol, 4-cresol and 4-hydroxybenzoic acid. This study provides new insights into the role of NaHCO 3 in toxicity alleviation and metabolism enhancement of NP in algae and can assist NP bioremediation efforts in aquatic environment.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Kun Wang,Xun Zhu,Yang Yang,Dingding Ye,Rong Chen,Qiang Liao
4-Nitrophenol (4-NP) is one of the most difficult treated water pollutants in industrial wastewater . Herein, the silver nanoparticle/polydopamine (Ag-PDA/PDMS) composite is successfully prepared by in situ reducing Ag catalyst on PDA surface. The Ag-PDA/PDMS catalytic layer possesses an excellent light-to-heat conversion ability and stability under light irradiation. The degradation rate of 4-NP to 4-aminophenol (4-AP) under light irradiation is significantly higher than that of non-irradiation, resulting from both the temperature rise in the catalytic layer, and hot electrons produced by Ag nanoparticles. The temperature rise caused by the photothermal conversion of light-irradiated catalytic layer dominates the performance improvement. The degradation rate of 4-NP reaches 95 % under light irradiation, demonstrating an efficient pathway to design the robust catalyst composites with high-performance photothermal conversion efficiency.
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ACS Applied Materials & Interfaces
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2022
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IF 10.383
Qinglin Wang,Zhuojun Wei,Jin Li,Danyang Feng,An Feng,Hui Zhang
Water-soluble captopril-capped atomically precise Pd nanoclusters (Pd17Capt8 NCs: 1.3 ± 0.5 nm) produced by a simple chemical reduction were supported on preprepared hybrid Co3Al-layered double hydroxide/reduced graphene oxide (Co3Al-LDH/rGO) by a pH-adjusted electrostatic adsorption strategy followed by proper calcinations, giving a series of novel catalysts x-PdNCs/CoAl(O)/rGO-T (x (Pd loading) = 0.09, 0.17, 0.43 wt % (ICP), T = 230, 250, 280, 300, 320 °C). The characterization results show that the as-obtained catalysts possess the hierarchical nanosheet array morphology. Pd NCs with a size of ∼1.3 to 1.8 nm are highly distributed at the edge sites of the CoAl(O) nanosheets. All of the x-PdNCs/CoAl(O)/rGO-T catalysts show superior catalytic efficiency for the conversion of 4-nitrophenol to 4-aminophenol, particularly 0.17-PdNCs/CoAl(O)/rGO-300 possesses the highest performance with a turnover frequency (TOF) of 30 042 h–1, which is the highest among the reported Pd-based catalysts so far. The superior activity of 0.17-PdNCs/CoAl(O)/rGO-300 can be owing to ultrafine Pd NCs with a clean surface, the strongest PdNCs–Co2+-OH(LDH)–rGO three-phase synergy, and the much improved adsorption of the substrate via π–π stacking upon nanosheet array morphology. Meanwhile, 0.17-PdNCs/CoAl(O)/rGO-300 exhibits excellent catalytic activities for various nitroarenes and anionic azo dyes as well as good reusability with the complete reduction of 4-nitrophenol (4-NP) within 90 s after 10 successive runs. The present work provides not only a simple and convenient strategy for the synthesis of clean, efficient, and environmentally friendly supported metal nanocluster catalysts but also a new idea for the efficient catalytic degradation of environmental pollutants.
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PubMed
高影响因子
STARCH-STARKE
·
2022
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IF 2.688
Mengyu Zhang,Wenshuai Wang,Wenxue Sun,Jianjun Zhang,Le Jia
This study investigates the efficacy of chewable tablets made from the Pleurotus djamor zinc polysaccharide (PCT-Zn) against the nonylphenol (NPs) induced male reproductive damage in mice. The trial takes the form of constructing a model by infusing NPs into mice, followed by treatment with PCT-Zn solution infusion 1 h later, for a total of 8 weeks. It is found that PCT-Zn shows potential effects on increasing the testicular coefficients, enhancing the antioxidant activities, and inhibiting the apoptotic and inflammatory responses, which indicate that PCT-Zn has the effect of alleviating the NPs-induced reproductive damage. The results of the experiment suggest that the P. djamor zinc polysaccharide can be used as a dietary supplement to develop appropriate products to alleviate reproductive damage caused by environmental pollutants.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Lili Zhang,Hongmei Yang,Huaxin Zhang
In this work, an imidazolyl dicationic ionic liquid was employed as a monomer to construct a novel nitrogen-rich hyper-crosslinked polymer (HCP–N) for the separation of 4-nitrophenol (4-NP) from wastewater. HCP-N was fabricated through a facile one-pot Friedel-Crafts polymerization, using p -dichloroxylene as cross-linking agents, as well as pore structure regulators. The synthesized HCP-N were randomly stacked by lamellar blocks aggregated by nanospheres . The adsorption kinetic data complied well with pseudo-second-order rate equation while the adsorption isothermal equilibriums conformed to the Freundlich model. At the initial concentration of 1000 mg L −1 , the adsorption capacity for 4-NP was up to 437 mg g −1 . The influence of acidity, temperature and coexisted metal ions were investigated systematically. Coexisted Pb 2+ at low concentration (<150 mg L −1 ) could significantly increase the adsorption capacity of HCP-N through complexing-bridging mechanism. The mechanism analyses revealed that hydrogen bonding , electrostatic and π−π interaction contributed together to the adsorption of 4-NP on HCP-N. The adsorbent could be recycled at least five times after the adsorbed 4-NP was separated by ethyl acetate extraction.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Lijiao Sun,Ying Wang,Lixian He,Jie Guo,Qingwen Deng,Xia Zhao,Ya Yan,Kezhen Qi
In this work, AgInS 2 (AIS) and cobalt (Co) doped AgInS 2 (Co-AIS) are prepared by low-temperature liquid phase method using thioglycolic acid (TGA) as the stabilizing agent. The crystal structure, surface elements, binding energy, particle morphology , and optical properties of AIS and Co-AIS are analyzed by XRD , XPS , SEM, TEM, UV-Vis-DRS, and PL . Rhodamine B (RhB) and 4-nitrophenol (4-NP) are used as the model pollutants for evaluating the photocatalytic activities of AIS and Co-AIS. The optimal doping ratio of CoːIn is found to be 10.7:6.3. And, under this optimal ratio, Co-AIS can degrade 95 % of RhB in 1.5 h or 76 % of 4-NP in 2.5 h, respectively. The photocatalytic mechanism is proposed based on the active species trapping experiment, EPR technique, optical properties characterization, and the flat-band potential determination. Moreover, the photocatalytic water splitting performance of Co-AISs with or without the modification of the multi-walled carbon nanotubes (MWCNTs) are investigated, and remarkable hydrogen production is achieved. This research will open a new gateway to synthesizing AgInS 2 -based materials and exploring their photocatalytic activities.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Liu Cui,Ziwei Bai,Ziqi Li,Zhaoyun Liu,Huanhuan Ma,Xiaoxu Chen,Kui Lin,Jia Hao,Yuanlu Cui,Fei Tian
Photocatalytic process using core–shell nano-catalyst is an efficient, eco-friendly, and cost-effective process for removal or minimize hazard of pollutants in waste water. Herein, a recyclable and robust Cu 2 O/Fe 3 O 4 @C/Cu core–shell nanocomposite with photocatalyst activities is designed based on the synergistic photocatalytic activities of Cu 2 O and Cu and the magnetic property and stability of Fe 3 O 4 @C. The Cu 2 O/Fe 3 O 4 @C/Cu is shown to act as nano-catalyst to almost completely convert 4-Nitrophenol (4-NP) to 4-aminophenol (4-AP) within 3 min by sufficient electrons in the electron-rich region formed under ultraviolet light irradiation. The Cu 2 O/Fe 3 O 4 @C/Cu nanocomposite shows a good stability, reusability and magnetic separation ability after five recycles. In addition, a photocatalytic mechanism of 4-NP reduction over this nanocomposite is proposed, and the roles of each nanocomponent of this nanostructure played in the synergistic enhancing photocatalytic performance via cascade reaction is demonstrated. This work suggests that Cu 2 O/Fe 3 O 4 @C/Cu nanocomposite with high activity, good stability and magnetically recyclability could be applied for the elimination of pollutants in wastewater.
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Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Zhiyu Liu,Ye Li,Shuangshuang Peng,Ju Huang,Bolin Su,Kai Gao,Shuai Zhou,Zhaojian Gao,Teng Chen
In this work, 3D flowerlike Ag NPs/NiCo-layered double hydroxide (NiCo-LDH) decorated on melamine sponge was fabricated through a facile hydrothermal and in-situ reduction method. 3D flowerlike Ag NPs/NiCo-LDH were demonstrated to immobilize on the skeleton of polydopamine-pretreated melamine sponge. The melamine sponge decorated with 3D flowerlike Ag NPs/ NiCo-LDH presented outstanding catalytic activity for reduction of various water-soluble organic dyes in the appearance of NaBH 4 as reducing agent, including 4-nitrophenol (4-NP), rhodamine B (RhB), methylene blue (MB) and methyl orange (MO), respectively. Owing to the appearance of Ag NPs, the melamine sponge decorated with 3D flowerlike Ag NPs/NiCo-LDH also showed efficient antibacterial activities against Gram-positive Staphylococcus aureus and Bacillus cereus , and Gram-negative Escherichia coli and Pseudomonas aeruginosa , suggesting its broad-spectrum antibacterial property. Moreover, the melamine sponge decorated with 3D flowerlike Ag NPs/ NiCo-LDH could also achieve the separation process for insoluble oils/organics from water by a facile surface modification technology after being treated toward low-surface-energy chemical of octadecylamine. The octadecylamine-coated sponge exhibited superhydrophobicity (WCA=158.6°) and superoleophilicity (OCA=0°), which could adsorb a wide range of oils/organics without the adsorption of any water, thus realizing the process of oil/water separation. The novel comprehensive melamine sponge demonstrates a new strategy for the remediation of complex polluted water.
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高影响因子
Catalysts
·
2022
·Vol. 12
·期 5
·499
·
IF 4.501
Mailidan Wumaer,Rahima Abdulla,Yuli Kou,Ziran Liu,Naeem Akram,Haji Akber Aisa,Jide Wang
The hydrogenation of 4-nitrophenol (4-NP) has attracted much attention, since it is typically used as a model reaction for evaluating newly developed catalysts, but its mechanism is still debated. Herein, Co(OH)2-modified CuO catalyst (Co(OH)2/CuO) was used for the reduction of 4-NP to 4-aminophenol (4-AP) in an aqueous sodium borohydride (NaBH4) solution. The reaction mechanism was investigated by UV-Vis spectroscopy (UV-Vis), high-performance liquid chromatography (HPLC), HPLC-Q-orbitrap high-resolution mass spectrometry (LC-MS/MS), and1HNMR spectroscopy (1HNMR) as an integrated technology at different concentrations of NaBH4. Samples were taken at specified time intervals and monitored using UV-Vis, HPLC, LC-MS/MS, and1HNMR. With the help of comprehensive analysis, eight intermediates, including azo and azoxy compounds, were effectively captured, and the variation tendency of each intermediate was determined, revealing that the hydrogenation of 4-NP proceeds via a coexistence of the direct and condensation routes. The integrated analysis methods were powerful technical supports for the study of the catalysis mechanism.Keywords:4-nitrophenol hydrogenation;intermediates;mechanism;Co(OH)2/CuO bimetallic nanocatalyst;integrated analysis method
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高影响因子
Journal of Cleaner Production
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2022
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IF 11.072
Wei-Dong Xiao,Ling-Ping Xiao,Wen-Zhe Xiao,Qiang Wang,Shang-Ru Zhai,Run-Cang Sun
The uniquely interconvertible transformation of cellulose pulp and paper shows great potential as smart materials for environment remediation. However, performing liquid-phase catalytic reactions involving hydrogenation steps under mild conditions and ambient temperature remains challenging. Herein, we report a facile and eco-friendly strategy to fabricate low-cost, highly effective, and stable pulp-supported silver nanoparticles (AgNPs/pulp). The pulp phase is used to maintain the high catalytic efficiency of the AgNPs/pulp catalyst, while the paper phase remains high stability as the filling material in the reaction column. The as-prepared AgNPs/pulp catalyst exhibits excellent catalytic activity toward NaBH 4 -mediated reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with a turnover frequency of 605.1 h −1 and a k value of 24.9 × 10 −3 s −1 at room temperature, which outperforms most of reported cellulose-supported catalysts. Impressively, the AgNPs/pulp catalyst shows outstanding durability during a continuous operation for 72 h. Such excellent performance can be attributed to the uniform dispersion of the AgNPs/pulp in solution and uniform distribution of Ag NPs on the fiber surface of cotton pulp, which greatly improve the accessibility of reactants and active sites as well as metal-support interactions. This work provides new insights into the understanding of catalytic hydrogenation of 4-NP, which could pave the way for rational design of novel cellulose-based catalysts for organic wastewater treatment .
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Chuanqiang Li,Xiang Liu,Xinyu Yang,Tao Peng,Yuqin Li,Maowen Chen,Chuanchuan Lin,Jing Jiang,Ziyu Su,Weijian Kong,Yang Wang
Tetragonal multilayered ZnO/CuO composites prepared by the annealing of a Zn- and Cu-containing pillar-layered metal-organic framework were characterized by using instrumental techniques and investigated as catalysts for the degradation of 4-nitrophenol (4-NP) under irradiation with UV–vis light. The as synthesized samples contained p-n junctions, amorphous-crystalline heterojunctions , which benefitted light absorption and charge separation. The calcination temperature significantly influenced both the physicochemical properties and photocatalytic activities of these composites. The sample obtained at 400 °C (TL-ZC-400) exhibited the best photocatalytic performance, achieving a 4-NP degradation efficiency of 93.93% after 40 min of illumination. The TL-ZC-400 still showed high photodegradation ability (97.2%) after four times recycling. Furthermore, the recombination of ZnO and CuO adjusted the band gap structure of TL-ZC-400. Radical trapping experiments showed that the degradation of 4-NP was mainly mediated by hydroxyl radicals and holes. A possible photocatalytic mechanism was also proposed in this study.
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