JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiahua Zhong,Linghan Li,Chunyan Li,Xin Mu,Anni Cui,Guiye Shan
The development of cuprous oxide (Cu 2 O) photocathode for photoelectrochemical (PEC) water splitting confronts charge recombination and photocorrosion. Herein, a facile strategy for wrapping Cu 2 O photocathode with Cu ions intercalated graphene oxide (Cu-GO) was proposed to realize efficient PEC water splitting. The intercalating GO with Cu ions could reduce the bandgap and enhance the carrier mobility of Cu-GO. The as-formed Cu-GO could suppress surface charge recombination and accumulation of the Cu-GO/Cu 2 O photocathode by improving the interfacial charge transfer, which strengthens electron extraction and restrains photocorrosion. The Cu-GO/Cu 2 O photocathode achieved a high photocurrent density of − 7.03 mA cm −2 (at 0 V vs. RHE) under AM 1.5 G illumination and excellent photostability for PEC water splitting. This work provides a simple way to design Cu 2 O-based photocathodes with reliable charge transfer layers for efficient PEC water splitting.
研究领域:
材料科学
·
能源转换与储存
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ENERGY CONVERSION AND MANAGEMENT
·
2021
·
IF 9.709
Wei Ji,Xiaomin Cheng,Haixue Chen,Linfeng Li,Yuanyuan Li,Zhi Liu
The sol–gel method was used to overcome the disadvantages associated with the high water solubility of molten salt into advantages, and a W/O emulsion system was constructed. The interfacial polymerization reaction was initiated by ammonium hydroxide to generate a SiO 2 shell layer, which served as a microcontainer for Solar Salt to prepare more stable regular spherical microcapsules with a diameter of 886 nm. Meanwhile, the oxygen-containing functional groups on the surface of graphene oxide (GO) were combined with the shell of the SiO 2 @Solar Salt phase-change heat-storage microcapsule through shared electron pairs and hydrogen bonds, such that they were uniformly distributed on the GO layer. The synthesized composite material exhibited a typical morphology of microcapsules with a core–shell structure uniformly loaded on the sheet. This study proves that the encapsulation of SiO 2 and introduction of the high thermal conductivity enhancement phase increased the thermal conductivity of the microcapsules by approximately 45% compared with pure nitrate and maintained a high specific heat capacity of 1.44 J/(g·K). In addition, the microcapsules exhibited excellent photothermal conversion efficiency, effectively absorbing visible light and increasing the heat storage rate. The addition of GO nanosheets and SiO 2 increased the structural stability of the composite material and its cycle life. Owing to the exquisite composite structure, the structural composition of the microcapsule remained unchanged after 500 thermal cycles, maintaining 98.5% latent heat, 99% heat capacity, and good thermal conductivity . This study provides a new solution for the efficient microencapsulation of molten salt heat storage materials.
研究领域:
材料科学
·
能源工程
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PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Qing Xiang,Yujie Qiang,Lei Guo
In this study, 4-amino-antipyrine (AAP) was grafted on graphene oxide (GO) via the hydrothermal strategy (GO@AAP) to improve the corrosion resistant property of epoxy coating . Transmission electron microscope (TEM), scanning probe microscope (SPM) and Raman techniques were employed to investigate the morphology and structure of GO@AAP nanohybrid , which also effectively confirmed the successful AAP grafted on GO surface . Electrochemical and salt spray results indicated that incorporating as-synthesized GO@AAP into epoxy coating powerfully enhanced the anti-corrosion property, which was greatly consistent with the mild steel morphology after corrosion experiment. Besides, after 60 days of immersion, the |Z| 0.01 Hz was 3.7 × 10 8 Ω·cm 2 , which was two order of magnitude higher than that of pure epoxy coating. Local electrochemical impedance spectroscopy (LEIS) was visually demonstrated the synergistic effect of physical shielding and corrosion inhibition of GO@AAP in 3.5 wt% NaCl solution. This work provides a new method to achieve the barrier and inhibition activities of epoxy coatings, which are suitable for heavy corrosion resistant application in harsh environment.
研究领域:
材料科学
·
腐蚀与防护
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
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IF 9.1
Xiaojun Li,Tingting Wang,Jingyu Shang,Lei Dong,Junjie Wu,Tuo Ji,Jiahua Zhu,Lilong Zhang,Liwen Mu,Xiaohua Lu,Han Lin
Graphene oxide (GO) lamellar membranes hold significant promise for gas separation but suffer from structural instability, particularly under high temperature, which deteriorates their separation performance. To address this, we developed a composite membrane by incorporating exfoliated boron nitride (BN) nanosheets into a GO matrix, followed by ionic liquid (IL) intercalation. Liquid nitrogen (LN 2 )-exfoliated BN nanosheets, characterized by uniformity and rigidity, were integrated to construct stable interlayer nanochannels. The resulting GO/BN-LN 2 membrane achieved a H 2 /CO 2 selectivity of 15.5 with a H 2 permeance of 505 GPU (gas permeation unit). More importantly, the intercalation of ILs (e.g., [Bmim][TF 2 N]) into the GO/BN interlayers yielded a synergistic enhancement. The ILs functioned as a selective CO 2 -absorbing layer and a “thermal buffer”, significantly improving the membrane's thermal stability. Consequently, the optimized GO/BN@IL composite membrane (d-spacing is 7.9 Å, and membrane thickness is 0.88 μm) maintained excellent performance at 363 K, exhibiting a markedly enhanced H 2 /CO 2 selectivity of 23.26 and a high H 2 permeance of 1020 GPU. This work demonstrates a facile strategy to simultaneously boost the selectivity, permeance, and thermal resilience of 2D lamellar membranes, showcasing their great potential for high-temperature H 2 purification applications.
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RSC Advances
·
2026
·Vol. 16
·期 32
·29576-29588
·
IF 6.1
Jin Yang,Xiaoxia Yan,Yifei Qin,Dazhi Zhang,Jingyi Zhao,Yi Yu,Qingjun Liu,Wenshuai Jiang
Dye wastewater, which poses serious threats to ecosystems and human health, is very difficult to treat. Graphene oxide (GO) has significant potential for dye adsorption. However, the practical application of GO in dye wastewater treatment is hindered by its high water solubility, which prevents its efficient separation and recovery after dye adsorption. In this study, we found that doping a small amount of MXene into GO induces composite dye-bridged reassembly during dye adsorption. The reassembled composite possesses favorable stability under external forces, thus enabling solid–liquid separation and material recovery without an external magnetic field. Notably, this dye adsorption-induced reassembly phenomenon was not observed in pure GO or pure MXene dye adsorption systems. The experimental results demonstrated that a small-fragmented GO/MXene composite with 20% MXene doping achieved optimal methylene blue (MB) adsorption and dye-bridged reassembly performance, with a maximum experimental adsorption capacity measured in practice of 883.17 mg g−1. The MB removal capacity of the composite was maintained over a wide pH range, with dye-bridged reassembly preferentially occurring under acidic and weakly alkaline conditions (pH 3–9). Higher dosages enhanced MB removal but impaired the dye-bridged reassembly, whereas thermal annealing reduced the composite adsorption capacity but preserved its dye-bridged reassembly ability. Although the presence of cations hindered MB adsorption, they promoted reassembly efficiency, which was positively correlated with cation valence. A quantitative recovery of approximately 95% was achieved with the GO/MXene composite. The proposed strategy enables efficient and scalable dye removal and offers a new path for high-performance and sustainable dye wastewater treatment.
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PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 2
·684
·
IF 3.4
Yunxin Yang,Cong Wang,Hua Zhang,Jiancai Qian,Song Yang,Huiyun Liao,Xuehui Sun,Yipeng Wang,Peijian Sun,Yunzhen Jia,Junwei Guo,Huaiyuan Zhu,Cong Nie
Removal of 1,3-butadiene from cigarette smoke plays an important role in human health and environmental protection. Herein, a series of UiO-66 X% containing different ratios of the -NH2group was synthesized via the solvothermal method by using terephthalic acid (H2BDC) and 2-aminoterephthalic acid (NH2-BDC) as ligands. Using GO as support, a series of UiO-66-NH2/GO Y% were prepared by controlling the ratio of UiO-66-NH2and GO. The effects of -NH2and GO contents on the structure and composition of MOFs were investigated. Finally, the different -NH2contents of UiO-66 X% and the different GO contents of UiO-66-NH2/GO Y% were applied in 1,3-butadiene removal from cigarette smoke. The results showed that UiO-66 X% with the higher contents of -NH2showed a higher rate of 1,3-butadiene removal, and UiO-66-NH2/GO Y% with the GO contents of 5% showed the highest removal rate of about 33.85%, which was 25.54% higher than that of activated carbon. In addition, the saturation capacity of the adsorbent materials for 1,3-butadiene was as high as 210.01–239.54 mg/g, showing great potential in reducing harmful components in cigarette smoke and environmental protection.Keywords:UiO-66;UiO-66-NH2/GO;1,3-butadiene removal;cigarette smoke
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Hao Ren,Xiao-Ting Yang,Jin-Gang Yu
Recently, industrial activities have produced large quantities of wastewater containing metal ions (such as rare earth elements) or organic contaminants (such as phenols), which are difficult to be degraded or recycled. Carbon nanocomposites have been considered to be a kind of effective adsorbent for the separation/enrichment of organic substances or metal ions from aqueous solutions. To selectively adsorb/remove these contaminants, 2-bis(2-hydroxyethyl)amino-2-(hydroxymethyl)− 1,3-propanediol was utilized as a functional component to modify graphene oxide (GO) by a facile one-step coupling method. The fabricated GO-BT composite was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy , X-ray photoelectron spectroscopy, specific surface area analysis, thermogravimetric analysis and Zeta potential analysis. The equilibrium adsorption capacities of GO-BT composite for Y 3+ , Yb 3+ , Eu 3+ , Sm 3+ , Nd 3+ , La 3+ , Er 3+ , Pr 3+ , p-chlorophenol (PCP), p-methylphenol (PMP), phenol and aniline were tested to be 24.89, 28.13, 18.77, 57.46, 26.25, 33.12, 22.64, 6.529, 486.5, 391.8, 268.0 and 60.34 µmol g −1 , respectively. The selectivity coefficient of GO-BT composite toward Y 3+ against phenol was 0.2999, confirming its excellent adsorption selectivity for organic phenols rather than rare earth elemental (REE) ions. After 10 times of adsorption-desorption cycles, GO-BT composite maintained 80% removal rate and considerable recycling performance. The adsorption process could be better described by the pseudo-second order kinetic model and the non-linear Langmuir isothermal model. Adsorption thermodynamic studies demonstrated a non-spontaneous and exothermic process with decreasing randomness. This work can provide some references for fabricating GO-based adsorbents for selective removal of organic reagents in the flotation separation of REE ores.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Qian Li,Fuyuan Yu,Yaru Cui,Juan Wang,Yan Zhao,Jianhong Peng
SnS and SnS 2 are two promising anode materials with excellent theoretical capacity for Sodium ion batteries . However, severe volume collapse and low electric charge conductivity dramatically affect the electrochemical performance of SnS and SnS 2 . As a consequence, SnS-SnS 2 heterostructures are constructed to improve the conductivity of the anode material. The volume effect is prevented by compounding with Graphene Oxide (GO) to ensure cyclic stability and improve the initial coulombic efficiency of anode materials. The first-principles simulation is used to simulate SnS, SnS 2 , SnS-SnS 2 and SnS-SnS 2 @GO respectively, and the comparison is made through actual experiments. Experimental studies indicate that SnS-SnS 2 @GO processes superior conductivity and cycle stability, unique nano-flake structure and the composite modification of GO can restrain the volume effect and ensure long cycle stability of the anode material (450.6 mAh·g −1 after 100 cycles). Moreover, attributing to the p-n heterostructures, the internal charges transfer and improve the electrical conductivity of SnS-SnS 2 can be promoted obviously. Simultaneously, it has been detected that the multilayer SnS-SnS 2 heterostructures combining GO effectively improve the conductivity and ensure good structure stability. Therefore, SnS-SnS 2 @GO composites can be considered as an ideal anode material for sodium ion batteries.
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Molecular Catalysis
·
2022
·
IF 5.089
Mantong Xue,Jianfei Sun,Xintong Li,Jianlei Qi,Qinqin Xu,Jianzhong Yin
Emissions of carbon dioxide can lead to the greenhouse effect, causing global warming and so on. conversion of carbon dioxide into high-value chemicals through catalysis, which is an effective method to successfully curb carbon emissions and prevent the greenhouse effect. Among them, CO 2 chemical synthesis of cyclic carbonate is one of the important way. In this paper, a new type of supported ionic liquid catalyst (GO-[DBU][Br]) was synthesized by one-pot method. Subsequently, the GO-[DBU][Br] was applied to the cycloaddition reaction of CO 2 in batch reaction and fixed bed continuous reaction, respectively. The stability of the catalyst was also explored, the GO-[DBU][Br] was easily separated and reused at least 5 times without significant loss of catalytic activity. The excellent catalytic performance comes from the synergistic effect of ionic liquid cations, halogenated anions, and a large number of oxygen-containing functional groups on the GO surface, a possible reaction mechanism was thus proposed. The study provides a safe, efficient, and industrial-scale continuous reaction system for CO 2 utilization.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Tong Sun,Xueqin Zhang,Baowei Qiu,Han Zhang,Liwei Yan,Mei Liang,Huawei Zou
In this paper, two kinds of amino compounds with different functionalities were used to modify the surface of graphene oxide (GO), uniform and stable aqueous dispersion was prepared by adjusting the pH value. For the first time, two kinds of modified GO multi-scale reinforced structures with different morphology were successfully constructed on the carbon fiber (CF) surface by electrophoretic deposition . The analysis showed that the morphology of ethylenediamine modified GO on the surface of CF presented a “Post-it” structure, while the morphology of melamine modified GO was a “Bark” structure. The presence of the modified GO can significantly improve the specific surface area and infiltration of the fibers. Compared with untreated carbon fiber composites , the comprehensive mechanical properties of the modified composites increased by 30.8% and 40.9% respectively. The improvement of dynamic mechanical properties also means the formation of good interface layer. This research provides a novel idea for producing multi-scale reinforced materials on the fiber surface.
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MATERIALS LETTERS
·
2021
·
IF 3.423
Wenbo Liu,Jiabin Zhou,Dan Liu,Su Liu,Xianjie Liu
Accelerating electron transfer can improve the catalytic performance. MIL-88/Go composites were synthesized by hydrothermal method using the oxygen-containing functional group of graphene oxide (GO) as the MIL-88 unit cell nucleus. Fe 2 O 3 /rGO composites with small particle size were prepared by roasting of MIL-88/GO. It has high degradation efficiency (99%) and good recycling performance for tetracycline hydrochloride (TC-HCl) in photo-Fenton system. The combination of oxygen vacancies produced by roasting MIL-88 and the conductivity of reduced graphene oxide (rGO) improves the rate of electron transfer. The efficient electron transfer promotes the formation of OH and O 2 − and thus improve the catalytic activity.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Jia Cheng,Xiaoyang Yue,Caixia Chen,Xiaoping Shen,Shiping Zeng,Zhenyuan Ji,Aihua Yuan,Guoxing Zhu
Developing highly efficient, low-cost and stable electrocatalysts for oxygen evolution reaction (OER) is momentous to achieve the conversion and storage of sustainable energy. Herein, the CoFe(OH) x / GO composites with accordion-like CoFe(OH) x nanosheets clusters dispersed on graphene oxide (GO) sheets are prepared via a template-assisted route. It is found that the OER performance of the CoFe(OH) x / GO composites strongly depends on the content of GO and the mole ratio of Co/Fe. The optimized CoFe(OH) x / GO composites exhibit remarkably enhanced OER electrocatalytic activity in 1 M KOH with a low overpotential of 294 mV at 10 mA cm −2 and a small Tafel slope of 63.4 mV dec −1 , which are far superior to the corresponding Co(OH) 2 / GO and bare CoFe(OH) x . The enhanced electrocatalytic activity can be ascribed to the regulated electronic structure surrounding the active metal sites by introducing Fe, the improved conductivity by GO for faster charge transfer, and the accordion-like hierarchical structure with increased accessible active sites. This work demonstrates a comprehensive strategy to improve the electrocatalytic performance of transition metal hydroxide based OER catalysts.
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