ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jinpeng Hu,Dezhi Zhang,Wenbao Li,Yan Li,Guorong Shan,Min Zuo,Yihu Song,Ziliang Wu,Lie Ma,Qiang Zheng,Miao Du
Marine biofouling, resulting from the adhesion of marine organisms to ship surfaces, has long been a significant issue in the maritime industry. In this paper, we focused on utilizing soft and hydrophilic hydrogels as a potential approach for antifouling (AF) coatings. Acrylic acid (AA) with a polyelectrolyte effect and N-(3-sulfopropyl)-N-(methacryloxyethyl)-N,N-dimethylammonium betaine (SBMA) with an antipolyelectrolyte effect were selected as monomers. By adjusting the monomer ratio, we were able to create hydrogel coatings that exhibited low swelling ratio in both fresh water and seawater. The Al(OH)3 nanoparticle, as a physical cross-linker, provided better mechanical properties (higher tensile strength and larger elongation at break) than the chemical cross-linker through the dynamic coordination bonds and plentiful hydrogen bonds. Additionally, we incorporated trehalose into the hydrogel, enabling the repair of the hydrogel network through covalent-like hydrogen bonding. The zwitterion compound SBMA endowed the hydrogel with excellent AF performance. It was found that the highest SBMA content did not lead to the best antibacterial performance, as bacterial adhesion quantity was also influenced by the charge of the hydrogel. The hydrogel with appropriate SBMA content being close to electrical neutrality exhibits the strongest zwitterionic property of PSBMA chains, resulting in the best antibacterial adhesion performance. Furthermore, the pronounced hydrophilicity of SBMA enhanced the lubrication of the hydrogel surface, thereby reducing the friction resistance when applied to the hull surface during ship navigation.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 37
·17531-17544
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IF 3.5
Zhao Shifeng,Ou Yanwen,Zhao Yanping,Liu Yuqin,Lv Fengzhu
Ferroan brucite with different Fe 2+ doping amounts (Mg 1-X Fe X (OH) 2 , x = 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8) was synthesized for the removal of Congo red (CR) from wastewater. As the Fe 2+ content increased, the removal efficiency initially increased and then decreased, and Mg 0.6 Fe 0.4 (OH) 2 exhibited the maximum removal amount which was 2745.96 mg/g. The high removal ability of Mg 0.6 Fe 0.4 (OH) 2 was derived from the combined removal mechanism. The removal amount of CR was highly related to the amount of Fe 2+ in MgFe(OH) 2 and its existed state. The removal behaviors of M 0.7 Fe 0.3 (OH) 2 (M = Zn, Ni, Co) were also conducted to verify the function and university of Fe 2+ in the degradation process. The influence of M 2+ in M 0.7 Fe 0.3 (OH) 2 (M = Zn, Ni, Co) on the removal efficiency was explored by experimental study and calculation of the system energy and bond length change based on molecular simulation. This work provided an outstanding approach for preparation of high efficiency materials to purify organic wastewater. Graphical Abstract
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CATALYSIS LETTERS
·
2024
·Vol. 155
·期 1
·1-15
·
IF 2.3
Gao Qing,Yu Yingxue,Wang Chengyun,Xiang Rui,Lu Hao
Designing an efficient Pd-based catalyst with high atom utilization efficiency is a pressing priority, presenting a significant challenge for the practical deployment of electrocatalytic hydrodechlorination (EHDC), a promising method for degrading hazardous chlorophenols (CPs). Herein, a hybrid Pd/Co(OH) 2 /NF electrode for the dechlorination of 2,4- dichlorophenol (2,4-DCP) is fabricated by a newly developed etching-deposition approach. Physical characterizations demonstrate that ultra-fine Pd nanoparticles (1.57 ± 0.29 nm) accompany with Pd 2+ hydroxides are uniformly deposited on the surface of Co(OH) 2 nanowire arrays. EHDC tests on Pd/Co(OH) 2 /NF show an impressive catalytic performance with a 94.5% removal efficiency within 2 h, fast reaction kinetics (0.024 min − 1 ) and remarkable current efficiency (55.4%), highly competitive with literature reports. Mechanism investigations indicate that the even distribution of Pd nanoparticles and coexistence of Pd 2+ sites facilitate the production of active H * and activation of C-Cl, contributing to the improvement of activity.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenhui Fang,Tingting Tang,Min Li,Shixian Xin,Ying Wu,Yutao Cao,Zhize Yu,Wei Cui,Zengxi Li,Hong Zhao
Designing catalysts at atomic level fine-tune the electronic structure of surface-active site for efficient water splitting, is a highly desirable approach but also poses significant challenges. This study focuses on the synthesis of a series of electronically tunable metal single-atom (M−SAs) catalysts: M 9 @S-Ni(OH) 2 (M=Pt, Mn, Fe or Cu). Experimental results reveal that introduction of trace S-heteroatoms and metal atoms into Ni(OH) 2 lattice can effectively modulate the electronic structure of M 9 @S-Ni(OH) 2 through modulation of p-d and d-d orbital hybridization, resulting in exceptional performance in water electrolysis. Among M 9 @S-Ni(OH) 2 , Pt 9 @S-Ni(OH) 2 and Fe 9 @S-Ni(OH) 2 exhibit excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance, respectively, the overpotential requiring only 7 mV and 269 mV, respectively, at current density of 10 mA cm −2 . (−) Pt 9 @S-Ni(OH) 2 ||Fe 9 @S-Ni(OH) 2 (+) presents a high current density of 531.07 mA cm −2 at cell-voltage of 1.80 V in overall-water splitting (OWS), which is 14.07 times higher than that of the commercial (−) Pt/C||IrO 2 (+) (37.86 mA cm −2 ) system. This work achieves the development of cost-effective and stable electrocatalysts, offering a solution for large-scale and sustainable water-hydrogen conversion.
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Sustainable Materials and Technologies
·
2024
·
IF 8.6
Cui Li,Yu Long,Yuanmeng Lou,Xuan Huo,Lili Ma,Yanan Tang,Chuncheng Hao,Xin Wen
As one typically sustainable polymer material, poly(butylene succinate) (PBS) is highly necessary to improve its flame retardancy and simultaneously maintain satisfied mechanical performances. In this study, “three-in-one” novel flame retardant was synthesized through grafting organophosphorus onto Fe-MOF functionalized Mg(OH) 2 (labeled as MH@Fe-MOF-P), then it was introduced into PBS matrix to investigate its effect on flame retardancy and mechanical properties. The results indicated that PBS/20MH@Fe-MOF-P exhibited excellent flame retardancy, including that the LOI was 29.6%, the UL-94 rating reached to V0, and the peak of heat release rate (PHRR) decreased by 82.1%. The flame retardant mechanism was ascribed to the synergistic effect of Mg(OH) 2 , Fe-MOF and organophosphorus on delaying the decomposition and catalyzing the carbonization of PBS. Meanwhile, PBS/20MH@Fe-MOF-P presented better mechanical performances than PBS/20MH and PBS/20MH@Fe-MOF composites, resulting from the special structure of MH@Fe-MOF-P to achieve good dispersion of fillers and strong polymer-filler interface adhesion. This work provides a novel strategy to modify Mg(OH) 2 with high flame retardant efficiency, and also broadens the practical applications of PBS materials with balanced comprehensive performances.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Yanting Dong,Qiang Wang,Jie Yang,Nanwen Zhu
Sulfadiazine (SDZ), a type of antibiotics with refractory and high-mobile characteristics, can accumulate and be detected out in aquatic ecosystems all over the world. SDZ can be destroyed by ozonation, but the degradation effect is easily and negatively affected by carbonate ions (CO 3 2- ) which be eliminated by introduction of Ca 2+ in ozonation systems. Experimental results manifested that the maximum removal rate of 100 % and 94.15 % corresponding to SDZ and chemical oxygen demand (COD) were achieved under the optimum Ca(OH) 2 addition without pH adjustment. In addition, the presence of Cl - and humic acid inhibited the SDZ degradation to some extent. It could be found that Ca 2+ and OH - jointly played great roles in increased oxidation of ozonation. For one thing, quenching effect of CO 3 2- on •OH was eliminated through combination of Ca 2+ and CO 3 2- and low molecular intermediate forming insoluble precipitates. For another, OH - caused alkaline condition which was instrumental in existence of •OH. Moreover, successive addition of Ca(OH) 2 was proposed and proved to be feasible to elevate the •OH generation and oxidizing ability in O 3 /Ca(OH) 2 system. Ultimately, the three potential degradation pathways of SDZ were speculated basing on density function theory (DFT) calculations and identification of several intermediate products. Overall, this study provided promising insights for promotion of antibiotics removal and ozonation efficiency by alleviating the inhibitory effect of carbonate ions in aqueous environment.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Junli Nie,Gangqiang Zhu,Weibin Zhang,Jianzhi Gao,Peng Zhong,Xiaotao Xie,Yu Huang,Mirabbos Hojamberdiev
Flower-like n -type CeO 2-δ is hybridized with p -type β-Bi 2 O 3 nanoparticles to design a novel β-Bi 2 O 3 /CeO 2-δ p - n heterojunction photocatalyst via a thermal treatment process of Bi/Ce(CO 3 )(OH) precursor. The synthesized β-Bi 2 O 3 /CeO 2-δ exhibits a remarkable enhancement in NO removal and significant suppression of toxic intermediates nitrogen dioxide (NO 2 ) under visible light irradiation. The superior photocatalytic activity of β-Bi 2 O 3 /CeO 2-δ for NO removal is mainly derived from the synergistic effects of the oxygen vacancies (OVs) and p-n heterojunction. The OVs not only enhance the visible light utilization and boost the separation of electron-hole pairs but also improve the adsorption and activation of NO and O 2 . Particularly, the p-n heterojunction is beneficial for the interfacial migration of photogenerated charge carriers. Electron spin resonance (ESR) and trapping experiment reveal that the synergistic effects of OVs and p-n heterojunction can induce the generation of more active species. The electrochemical measurements and density-functional theory (DFT) calculations in-depth confirm that both p-n heterojunction and OVs can accelerate the interfacial charge transfer, resulting in the deep oxidation of reactants. Therefore, the flower-like β-Bi 2 O 3 /CeO 2-δ p-n heterojunction photocatalyst exhibits an advanced photocatalytic activity for deep NO removal and a suppressed NO 2 generation. In addition, monitoring the reaction products by in situ Fourier transform infrared spectrum (FTIR) further validates that the main products of nitrates are formed during the photocatalytic process. This work demonstrates a straightforward approach for construction of p-n heterojunction photocatalysts, which can enhance the effective photocatalytic activity and stability for NO removal.
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CRYSTENGCOMM
·
2015
·Vol. 17
·期 11
·2376-2388
·
IF 4.034
Xiang-Sheng Zhai,Wen-Gang Zhu,Wei Xu,Ya-Jing Huang,Yue-Qing Zheng
Four new 3D uranyl complexes, [(UO2)2(H2O)(ipa)2]·9H2O (1), [(UO2)2(H2O)(nip)2]·H2O·Et3NH (2), [(UO2)2(H2O)(aip)2]·Et3NH (3) and [(UO2)(hip)]2·17H2O (4) (H2ipa = isophthalic acid, H2nip = 5-nitroisophthalic acid, H2aip = 5-aminoisophthalic acid, H2hip = 5-hydroxyisophthalic acid, Et3N = triethylamine), were hydrothermally synthesized. Structural analyses reveal that compounds 1–4 consist of pentagonal bipyramidal uranyl monomers bridged via acid inkers to form a structural motif, [(UO2)2L2], serving as the foundation of the 3D framework. Two structural motifs adopt different arrangement modes to connect to two types of chains. For 1–3, uranium atoms and carboxyl groups being from two types of chains respectively are coordinated to build similar 3D frameworks, while for 4, one type of chain links to the 3D architecture by the bond of the uranium atoms and –OH of the 5-hydroxyisophthalic acid ligand. The different guest molecules and structure assemblies displayed by the four compounds are a function of the variation of substituent groups of 5-X-1,3-benzenedicarboxylic acid (X = –H, –NO2, –NH2, –OH). Furthermore, the photocatalytic properties of 2 and 4 for degradation of rhodamine-B (RhB) upon xenon lamp irradiation have been examined. Elemental analysis, infrared spectroscopy, DRS and luminescence properties were also discussed.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Tong Zhang,Yuan Chen,Tao Wang,Chang Liu,Dan He,Bin Liu,Yuanyuan Liu
Advanced oxidation processes are widely used to remove petroleum hydrocarbons from soil, but usually consume large quantities of ferrous and acidify the soil. This study tested an advanced oxidation approach based on percarbonate in laboratory experiments. It removed 88% petroleum hydrocarbons in soil with a pH increase from 8.2 to 10.2. ·OH and ·CO 3 - were the main reactive species, and degraded 41% and 37% PHCs from soil respectively. The o-dihydroxybenzene structure in catechin was found to reduce ferric to ferrous, and prolong the generation of ·OH from 120 s to over 1800 s. The petroleum hydrocarbons were degraded to intermediates including alkanes and olefins through hydrogen-abstraction by ·OH and ·CO 3 - , and by dimerization and β-scission of alkyl radicals. These intermediates were then oxidized to CO 2 and H 2 O by ·OH and ·CO 3 - . The main residual intermediates in the soil were low-molecular-weight n-alkanes and branched alkanes, and they were found to inhibit the growth of oats ( Avena sativa L. ) much less than the original petroleum hydrocarbons. These findings provide a fundamental basis for designing effective technologies which use percarbonate to remove organic pollutants .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Hui Wang,Lei Zhang,Huasheng Jiang,Palanisamy Kannan,Rongfang Wang,Palaniappan Subramanian,Shan Ji
Urea, a non-toxic nitrogenous small molecule, is used for electrochemical energy storage and conversion. However, slow kinetics of urea electro-oxidation reaction and finding an optimal catalyst continues to be major challenges. In this study, we report the preparation of hierarchical Ni(OH) 2 –NiS in-plane edge hybrid nanosheets on the carbon cloth surface (Ni(OH) 2 –NiS-CC) as a flexible catalytic electrode by hydrothermal and electroplating processes. The Ni(OH) 2 –NiS-CC substrate is characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electro-chemical methods. The developed hierarchical Ni(OH) 2 –NiS-CC nanosheets electrode shows an enhanced electrocatalytic performance (low-onset oxidation potential, rapid reaction kinetics, and higher mass activity) towards urea electro-oxidation than NiS-CC in an alkaline solution. Counting the benefits including superior catalytic activity, conductivity and available more active sites, the hierarchical Ni(OH) 2 –NiS-CC in-plane edge hybrid nanosheets electrode displays urea electro-oxidation with a catalytic current of 87.5 mA at 0.8 V vs. Ag/AgCl, which denotes the remarkable electrocatalytic activity as compared with other Ni based catalysts. This simple and useful electrode fabrication method enables a new route to acquire ultra-fine heterostructured substrates for wide variety of potential applications including direct-urea-fuel-cells (DUFC) and urea-assisted water splitting.
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Hongshuai Zhu,Yue Cai,Aori Qileng,Zhu Quan,Wei Zeng,Kaiyu He,Yingju Liu
The convenient and effective detection of toxins is urgently demanded for food security and human health. Herein, based on the catalytic activity of mimetic peroxidase from the Cu 2 [email protected] (OH) 3 yolk-shell nanocages, a dual-modal multi-colorimetric and ratiometric fluorescence immunosensor for the sensitive detection of ochratoxin A (OTA) was successfully developed. For the multi-colorimetric detection, H 2 O 2 can be effectively decomposed by Cu 2 [email protected] (OH) 3 to form ·OH groups, thus Au nanorods (Au NRs) can be etched to exhibit vivid color variations and localized surface plasmon resonance (LSPR) shifts. For the ratiometric fluorescence detection, o -phenylenediamine was oxidized by Cu 2 [email protected] (OH) 3 to form 2,3-diaminophenazine (DAP) in the presence of H 2 O 2 . Interestingly, the exogenous fluorescence signal source of carbon dots can be quenched by DAP via inner filter effect, while a new emission peak at 563 nm can be discovered, forming a ratiometric fluorescence signal. Due to the independent signals and mutual confirmation, the performance of the dual-modal immunosensor for the detection of OTA was significantly improved, where a broad linear range from 1 ng/L to 10 μg/L with a detection limit of 0.56 ng/L (S/N = 3) was achieved. The sensing strategy was also used to monitor OTA in millet and lake water samples with a satisfied performance.
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ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Qi Sun,Zhijuan Li,Ningxin Liu,Yuting Zhou,Fuyan Zhang,Shuang Li,Peng Jin,Rui Xiang,Tao Le
There is an urgent need to develop an economical and convenient method for the ultrasensitive detection of patulin (PAT), a mycotoxin that can potentially harm human health when it is found in fruits and their derivatives. In this study, we have developed a novel fluorescent aptasensor that utilizes nitrogen-doped carbon dots (N-CDs) as the fluorescent donor and hexagonal β-Co(OH) 2 nanoplates as the fluorescent acceptor. N-CDs were synthesized through the hydrothermal method, resulting in spherical particles with a diameter of 7.6 nm. These nanoparticles exhibited excellent water solubility and displayed a vibrant blue emission at 448 nm when excited at 360 nm. Cobalt hydroxide nanoplates with a beta crystal structure [β-Co(OH) 2 ] were synthesized using a simple co-precipitation method, exhibiting hexagonal plate-like shapes with uniform lateral sizes of 4–5 μm. The fluorescence of N-CDs can be efficiently quenched by hexagonal β-Co(OH) 2 nanoplates through Förster resonance energy transfer mechanism. The maximum quenching-recovery capability can be achieved when the concentrations of N-CDs-Apt and β-Co(OH) 2 nanoplates are 150 nmol/L and 100 μg/mL, respectively. The pH of the TE buffer should be 8.0, and the incubation time should be 10 min at 25 °C. The developed fluorescent aptasensor displayed an excellent selectivity for PAT determination with a detection limit of 0.57 pg/mL in the linear range of 1.25 pg/mL-100 ng/mL. The rapid PAT determination in fruit juice samples was realized with good recoveries (96.9–105.8%). The developed fluorescent aptasensor based on the interaction between N-CDs and hexagonal β-Co(OH) 2 nanoplates can be a promising method for the rapid and ultrasensitive detection of PAT in agricultural products.
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