JOURNAL OF CULTURAL HERITAGE
·
2023
·
IF 3.1
Lina Xie,Lan Yao,Bingjian Zhang,Yulan Hu
The moss colonization on the surface of historic buildings could result not only in a biodeterioration but also in an aesthetical damage. In this study, some mixtures of consolidant (MMH) and GO@CuO hybrids were developed to control moss growth on the surface of weathered sandstone. An innovative aspect of the study was that, by using GO as the intermediate, the CuO nanoparticles were anchored to the MMH consolidant. This method could effectively improve the binding force between CuO nanoparticles and the stone substrate and make it not be washed away by rainfall. Several formulations have been prepared, applied on weathered sandstone specimens, and tested in laboratory to investigate the impact of GO@CuO hybrids addition on consolidation performance. The complex consolidants were subjected to an antibiological activity assay to assess their capability to inactivate moss spores. The complex consolidants were also applied to the specimens covered with mosses. The obtained results demonstrated that the consolidant loaded with GO@CuO hybrids were effective in consolidating the weathered substrate and preventing moss growth on its surface. Additionally, the complex consolidant also had the function of controlling re-colonization of moss after conservation treatment.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yingfa Liu,Zhongxiang Bai,Guo Lin,Lingling Wang,Xiaoqian Xu,Liang He,Xiaobo Liu
The excellent water transport and molecular sieving properties of graphene oxide (GO)-based membranes have shown application prospects in solving the freshwater crisis. However, it is challenging to further increase water permeability while ensuring separation efficiency, and the destruction of the membrane structure caused by the electrostatic repulsion between the graphene oxide nanosheets also hinders its practical application. In this study, a simple vacuum-assisted method is proposed to prepare a chemical cross-linking mediated composite graphene oxide nanofiltration membrane (GO-TA-APTES-x) by adding tannic acid (TA)-aminopropyltriethoxysilane (APTES) nanoparticles (TA-APTES NPs). Thanks to the expansion of GO membrane interlayer spacing by TA-APTES NPs, the permeability of the GO-TA-APTES-10 membrane is 15 times higher than that of the original GO membrane, and the rejection rate of Congo red remains at 99.9%. In addition, TA-APTES NPs improves the application stability of composite membrane in water environment by means of chemical crosslinking agent, which is expected to promote the transformation of GO nanofiltration membrane from the laboratory environment to industrial application.
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高影响因子
DESALINATION
·
2022
·
IF 11.211
Wenxin Zhang,Yaqi Zhang,Yuze Wang,Shiwei Tian,Na Han,Wei Li,Wei Wang,Hongwei Liu,Xuhuan Yan,Xingxiang Zhang
Membrane fouling remains a significant restriction for the long-time operation. In this paper, fluffy-like amphiphilic graphene oxide (f-GO) was prepared by simple grafting silane coupling agent (KH-570) onto the graphene oxide matrix, and thus featured with good dispersion behavior in organic solution. The f-GO was further incorporated into the PAN-based (poly(acrylonitrile-methyl acrylate), P(AN-MA)) copolymer during the phase inversion process. Compared with the P(AN-MA) membrane, the resistance of the f-GO/P(AN-MA) composite membrane reduced from 4.49 × 10 −12 m −1 to 1.78 × 10 −12 m −1 . The pure water flux increased from 200 to 326 L/m 2 h, while the water contact angle declined from 92.8° to 68.3°. It is worthy to note that the fouling mode changed from irreversible fouling to reversible fouling , with the total fouling rate showing a half decay. The fouling recovery rate reached 98.16% and the BSA rejection rate increased from 70.59% to 99.33% as 0.5 wt% f-GO was incorporated. The f-GO is easily scaled up and can be widely applied in other polymer matrices , showing potential application prospects in the membrane separation and purification area. The f-GO/P(AN-MA) composite membranes with excellent water flux, BSA rejection and FRR, are candidates for further employment in wastewater purification applications.
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高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Linfa Bao,Jingjing Han,Huifang Wang,Renrong Liu,Muqing Qiu,Baowei Hu
In this study, a novel synergistic photocatalyst (Fe 3 O 4 /GO/g-C 3 N 4 composites) were constructed by chemical precipitation of Fe 3 O 4 nanoparticles on surface of GO/g-C 3 N 4 suspension. The characterization results indicated that Fe 3 O 4 /GO/g-C 3 N 4 composites exhibited high efficient separation of photogenerated electron–hole pair, narrow bandgap (∼2.38 eV) and wide absorption range. The incorporation of Fe 3 O 4 significantly increased the photocatalytic performance of GO/g-C 3 N 4 composites due to synergistic effect. More than 90% of U(VI) was photo-reduced by Fe 3 O 4 /GO/g-C 3 N 4 composites within 2 h under visible light irradiation. The trapping experiments and XPS analysis indicated that the photogenerated electrons and superoxide ( ⋅ O 2 ) radicals are responsible for U(VI) removal. These findings indicated that magnetic g-C 3 N 4 composites can be used as excellent candidates for the high efficient removal of U(VI) in actual environmental cleanup.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Hanchen Ye,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
Dyes, salts, microorganisms, and other pollutants found in wastewater can be harmful to the environment and are difficult to treat. To address this problem, we designed and prepared a graphene oxide (GO) membrane that was modified with an azine-linked covalent-organic framework via dipping and polymerization. This membrane could efficiently remove dyes with molecular weight from 319.85 to 1355.37 (removal efficiency greater than 90%), inorganic salts (greater than 80%), and microorganisms (nearly 100%). The maximum flux of the composite membrane can reach 47 L m −2 h −1 bar −1 . The developed membrane was able to carry out its removal effect by utilizing a combination of sieving and electrostatic interactions , showing promising future application prospects. The removal mechanism of the developed membrane is also briefly discussed.
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高影响因子
CARBON
·
2022
·
IF 11.307
Xueyan Wang,Zhong Liu,Xianfeng Liu,Ying Su,Jin Wang,Tingting Fan,Xin Ning,Seeram Ramakrishn,Yun-Ze Long
The accumulative disasters about oil spills and industrial emissions create increasingly environmental problems, and high-performance absorbent materials have attracted wide attention to providing available solution. Herein, polyvinylidene fluoride/SiO 2 @graphene oxide (PVDF/SiO 2 @GO) aerogels were prepared by cross-linking of the electrospun PVDF/SiO 2 nanofibers and GO skeleton. By changing the content of SiO 2 nanoparticles in the PVDF nanofibers, the porosity and surface roughness of the composite aerogels could be controlled. Compared with PVDF@GO aerogel, the PVDF/SiO 2 @GO (PSG) aerogels had higher mechanical properties and hydrophobicity . And, the PSG-2 aerogel (1 wt% SiO 2 contained in nanofibers) exhibited stable structure, excellent oil absorption capacity (129–264 g g −1 ), great flame retardancy and reusability . After being pretreated with strong acid and alkali, it remained strong hydrophobicity, indicating it possessed excellent chemical resistance. More importantly, it could also separate oil-water mixture by gravity under harsh environment (strong acid/alkali), which exhibited excellent separation performance with flux of 42402 L m −2 h −1 (chloroform/water mixture) and separation efficiency of 99.96%. Moreover, it could clean up viscous crude oil rapidly by photothermal effect, and the crude oil absorption time of heated PSG-2 was reduced by 99.65%. The PSG aerogels provide a new choice for efficient and continuous harsh environmental oil-water separation and crude oil absorption.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Tengda Zhang,Bo Ouyang,Xiuling Zhang,Guangqing Xia,Nantao Wang,Haoyu Ou,Long Ma,Pengxin Mao,Kostya (Ken) Ostrikov,Lanbo Di,Xin Tu
Effective catalytic removal of 4-nitrophenol (4-NP) in industrial wastewater remains a significant challenge due to the lack of highly efficient and stable catalysts. Herein, we demonstrated a promising plasma method for the facile, ultra-fast and low-temperature synthesis of graphite oxide (GO)-supported palladium catalyst (Pd/GO-P) rich in oxygen-containing groups (OCGs) and defects with smaller Pd nanoparticles (NPs) for highly efficient 4-NP reduction. The plasma method limited the damage to the OCGs and retained more OCGs (mainly alkoxy and hydroxyl groups) on the GO surface. In addition, plasma treatment can increase the active sites and the density of GO surface defects. These OCGs and defects promoted the 4-NP adsorption and improved the catalyst dispersion in the aqueous solution of 4-NP, thereby enhancing the catalytic reduction performance. The Pd/GO-P catalyst showed the highest reduction of 4-NP reported thus far, with a concentration-normalized rate constant of 5576 min −1 g −1 L. This value was 51.6 and 20.5 times greater than that using Pd/rGO-H prepared by a traditional thermal reduction method and a commercial Pd/AC catalyst, respectively. This work opens the avenue of exploring the use of plasma for the rational design of supported Pd catalysts with superior performance for the reduction and recycling of 4-NP in wastewater.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 8
·087506
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IF 4.386
Bolu Sun,Chengyang Gao,Lin Yang,Hongxia Shi,Lei Kan,Quhuan Ma,Xiaofeng Shi
Identification and quantification of epigoitrin (EP) in some herbs and traditional Chinese medicine (TCM) preparations are critical to pharmacokinetic study and pharmaceutical quality control due to its distinct antiviral activity. So, developing highly sensitive and selective method for detection of EP is essential for clinical treatment and drug development. In this study, a novel molecularly imprinted electrochemical sensor for detection of EP was firstly constructed. With acrylamide imprinting systems, surface imprinting on the polyaniline functionalized graphene oxide was employed to prepare molecularly imprinted polymer by electro-polymerization, which follow-up constructed afford specific binding cavities, endowing the exclusive recognition ability. Furthermore, the polyacrylamide chain is anchored to the polyaniline chain by covalent bonds, which is beneficial for raising electrochemistry signal. Under the optimized condition, the sensor demonstrates a linear wide range of 4.6 × 10−7 mol l−1 ∼ 4.6 × 10−5 mol l−1 with a correlation coefficient of 0.9953 and a low LOD of 8.21 × 10−8 mol l−1 (S/N = 3). Additionally, the sensor showed good stability, repeatability (RSD 1.52%) and selectivity. The method was applied to analyze EP in the extraction from Isatidis Radix with a recovery higher than 97.8% and RSD less than 1.81%. This work provided a novel strategy for on-site, real-time and rapid detection of indicator components from TCM.
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高影响因子
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Luyao Zhang,Fuli Tian,Huan Li,Jiangman Meng,Qi Liu,Xiaoqian Guo,Yun Qiu,Jun Zhang,Changyan Li
A series of non-enzymatic graphene functionalized biosensors was developed via deposition precipitation method for lactic acid (LA) detection, which were characterized by transmission electron microscopy (TEM), Raman spectroscopy , X-ray photoelectron spectroscopy (XPS), gas chromatography-mass spectrometry, liquid chromatography-mass spectrometry, and proton nuclear magnetic resonance ( 1 H NMR). The electrochemical performances of the non-enzymatic biosensors were measured by means of the electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) method. The comprehensive analysis of structures shows that Pt, CeO 2 , and GO components interact with each other. During the storing and releasing oxygen, the valence ratio of Ce 3+ /Ce 4+ and the number of oxygen vacancies in CeO 2 change accordingly, which can be conducive to increasing electronic transmission capacity and finally leads to the improvement of electrocatalytic performance. Among them, the Pt/CeO 2 /GO biosensor containing 0.47 at% platinum exhibits an excellent electrochemical detection performance with high sensitivity of 12.3 µA·L/ (mmol·cm 2 ) and a low limit of detection (LOD) of 5.12 μmol/L in a wide linear range from 10 to 900 μmol/L. In addition, the proposed biosensor possesses a promising anti-interference capability, as well as high stability and good reproducibility, which was assessed by testing the cyclic voltammogram in 0.1 mol/L lactic acid one year later. The underlying mechanism was proposed for electrochemical oxidation of LA to carbon dioxide and acetic acid with the synergistic effect among Pt, CeO 2 , and GO. Furthermore, the results of the standard addition method in real samples (human serum and urine samples) reveal that the lactic acid detection of the non-enzymatic Pt/CeO 2 /GO biosensor is accompanied by high reliability. Thus, it will be a valuable biosensor for in vitro detection of lactic acid level in clinical samples.
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高影响因子
Polymers
·
2021
·Vol. 13
·期 16
·2812
·
IF 4.329
Meng Zhang,Dong Wang,Nana Ji,Shaoxiang Lee,Guohui Wang,Yuqi Zheng,Xin Zhang,Lin Yang,Zhiwei Qin,Yang Yang
Due to the spread of drug-resistant bacteria in hospitals, the development of antibacterial dressings has become a strategy to control wound infections caused by bacteria. Here, we reported a green strategy for in situ biomimetic syntheses of silver nanoparticles@organic frameworks/graphene oxide (Ag@MOF–GO) in sericin/chitosan/polyvinyl alcohol hydrogel. Ag@MOF–GO was synthesized in situ from the redox properties of tyrosine residues in silk sericin without additional chemicals, similar to a biomineralization process. The sericin/chitosan/Ag@MOF–GO dressing possessed a high porosity, good water retention, and a swelling ratio. The hemolysis rate of the composite was 3.9% and the cell viability rate was 131.2%, which indicated the hydrogel possessed good biocompatibility. The composite also showed excellent lasting antibacterial properties against drug-sensitive and drug-resistant pathogenic bacteria. The composite possessed excellent hemostatic activity. The coagulation effect of the composite may be related to its effect on the red blood cells and platelets, but it has nothing to do with the activation of coagulation factors. An in vitro cell migration assay confirmed and an in vivo evaluation of mice indicated that the composite could accelerate wound healing and re-epithelialization. In summary, the composite material is an ideal dressing for accelerating hemostasis, preventing bacterial infection, and promoting wound healing.Keywords:biomimetic synthesis;hemostasis;antibacterial activity;wound healing
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PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Hongji Li,Jinyue Zhang,Dandan Wang,Junfu Wang,Wei Jiang,Tianyu Zhou,Chunbo Liu,Guangbo Che
In this study, it presents a novel surface-enhanced Raman scattering (SERS) imprinted membrane to be applied into the detection of trace-level antibiotic in aqueous samples. Graphene oxide- argentum (GO/Ag) composites are chosen as the SERS substrates to fabricate on poly(vinylidene fluoride) (PVDF) membrane surface, increasing the hydrophilia and promoting the sensitivity. The amount of GO is investigated to confirm the optimal concentration. Whereafter, in order to effectively apply into practical sample detection, the technique of molecular imprinting is also introduced to improve the selectivity of SERS membrane. The SERS imprinted membrane (AGP-MIM) is synthesized by the process of two-step precipitation polymerization and applied into the detection of enrofloxacin hydrochloride. The characteristics are adequately investigated and proved that the AGP-MIM can be applied into practical samples detection.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yubo Pan,Yali Zhang,Yaoguo Huang,Yun Jia,Linlin Chen
Cyanide wastewater contains highly toxic contaminants such as free cyanide and metal-cyanide complex, it is necessary to find the appropriate degradation technologies. In this study, a simple and effective photocatalyst with enhanced adsorption and photocatalytic activity was developed. A new composite photocatalyst was successfully prepared by solid-state dispersion (SSD) method, which combined graphene oxide (GO), nano titanium dioxide (nano-TiO 2 ) and silicon-based zeolite (ZSM-5). The techniques of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), N 2 adsorption–desorption test, X-ray diffraction (XRD), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS) were used to characterize the samples. The experiments with different content of nano-TiO 2 , different wavelengths of light source, different catalyst dosage, control experiments of different materials, and the determination of pH value and zeta potential were also carried out. The results showed that the 3.0 g/L of GTZ-60 (GO/TiO 2 /ZSM-5 composite photocatalyst with a content of 60 wt% TiO 2 ) has the highest photocatalytic degradation efficiency under ultraviolet wavelength which the degradation efficiency of total cyanide and copper could reach 98.73% and 98.96%, respectively. The degradation of total cyanide followed the pseudo-first-order kinetics. The photoelectric properties of GTZ-60 obviously improved the migration and separation of photogenerated electrons ( e − ) and holes ( h + ), so that high photocatalytic efficiency was obtained. XPS analysis showed that cyanide was finally degraded to carbon oxide and nitrogen oxide. Copper and zinc are removed in the form of copper (Ⅱ) and zinc (Ⅱ).
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高影响因子
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