JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yuan Yuan Cai,Qiu Gen Zhang,Ai Mei Zhu,Qing Lin Liu
A novel two-dimensional (2D) zeolitic imidazolate framework-graphene oxide hybrid nanocomposite (ZIF-L@GO) is designed as an inorganic filler in sulfonated poly(ether ether ketone) (SPEEK). ZIF-L with unique leaf-like morphology is grown in-situ on the GO sheet in aqueous media at room temperature . The terminal imidazole linker in ZIF-L@GO and the –SO 3 H in SPEEK can form acid-base pairs in the membrane interface to produce low energy proton conduction highway. Benefiting from the unique structural advantage, the hybrid SP-ZIF-L@GO membranes displayed promoted physicochemical and electrochemical performances over the pure SPEEK. The SP-ZIF-L@GO-5 achieved a proton conductivity of 0.265 and 0.0364 S cm −1 at 70 °C-100% RH and 90 °C-40% RH, 1.76- and 6.24-fold higher than pure SPEEK, respectively. Meanwhile, a single cell based on SP-ZIF-L@GO-5 had an output power up to 652.82 mW cm −2 at 60 °C, 1.45 times higher than the pure SPEEK. In addition, the durability test was performed by holding open circuit voltage (OCV) for 24 h. The SP-ZIF-L@GO-5 provided better long-term stability than the pure SPEEK. These superior performance suggests a promising application in PEMFC.
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高影响因子
ACS Applied Energy Materials
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2021
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IF 6.024
Jiannan Ding,Peng Chen,Xuli Chen,Kunkun Guo
Polyaniline and nanocarbon composite hydrogels (PCR) are fabricated by a self-assemble strategy with polyaniline content as high as 66.7%, where multiwall carbon nanotubes (MWCNTs) as reinforcing bars are embedded into the three-dimensional graphene skeletons to enhance the conductivity and mechanical stability. After the incorporation of MWCNTs, the conductivity, porous volume, and specific surface area of the PCR hydrogel increase 32, 53, and 36.8% with respect to the PR hydrogel, respectively. First-principles density functional theory calculations show that the interactions between PANI and graphene/GO are all adsorptive, thereby producing a much more homogeneous and compact structure. Due to this favorable structure, the stress and mechanical degradations of PANI can be alleviated during the repeated charge/discharges. As such, the as-prepared hydrogel-based supercapacitor electrode shows a very high specific capacitance about 917 F g–1 at 1 A g–1 and relatively high rate capability of about 84% from 1 to 20 A g–1. The assembled flexible asymmetric all-solid-state supercapacitor achieves a high energy density of about 31.32 W h kg–1 at the power density (364.93 W kg–1). These results demonstrate that polyaniline and nanocarbon composite hydrogels have great potential to become an advanced power device for wearable electronics.
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NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 7
·3630-3639
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IF 3.591
Kaijia Li,Hongxiang Ou,Dongsheng Zhou,Chenxia Gong,Honglai Xue,Yuyan Li
Graphene oxide (GO) has the advantages of a high specific surface area and great mechanical properties, which make it useful in the field of adsorption; however, it is difficult to obtain and utilize nano-size GO for adsorption and separation. In this study, zinc ion crosslinked GO and sodium alginate aerogel microspheres (Zn–GO@SA) were prepared using the ion–gel method and used for ciprofloxacin (CIP) adsorption, and this was easy to separate and collect from solutions. Methods such as SEM, EDX, FT-IR, and TGA were used for physical and chemical characterization. The adsorption properties and mechanisms were examined via static and dynamic adsorption experiments. The results indicated that the Zn–GO@SA aerogel microspheres had abundant and ordered cavities. The adsorption isotherm and kinetic data fitting results showed that the adsorption process was consistent with the Freundlich model and a quasi-second-order kinetics model. The adsorption of CIP was a multi-layer adsorption process dominated by chemical adsorption. At 308 K, the maximum adsorption capacity was 134.85 mg g−1, while increasing the adsorption temperature had an adverse effect on CIP adsorption. The results of regeneration and dynamic adsorption experiments showed that Zn–GO@SA aerogel microspheres maintained good adsorption performance after repeated use, which means they have potential for practical applications.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2021
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IF 6.064
Junhai Wang,Weipeng Zhuang,Tingting Yan,Wenfeng Liang,Ting Li,Lixiu Zhang,Xiaoyi Wei
Herein, copper perrhenate (Cu(ReO 4 ) 2 ) was synthesized using a micro-emulsion method and adhered to graphene (Gr) using an ultrasonic process. Then, the as-prepared Cu(ReO 4 ) 2 /Gr composite was added into the synthetic oil as a lubricant additive with the help of ionic liquid to achieve enhanced dispersion stability within the base oil. The tribological performances of the Cu(ReO 4 ) 2 /Gr additive were investigated using four-ball tests and the ball-on-disk reciprocating configuration under various temperatures. The potential lubrication mechanisms of the Cu(ReO 4 ) 2 /Gr additive were performed using a series of characterization methods including XRD, Raman, SEM-EDS, TEM, DSC/TG, and XPS. The results of four-ball tests at room temperature indicated that the Cu(ReO 4 ) 2 /Gr additive could substantially improve the tribological performances of the base oil. The smallest coefficient of friction (COF) and wear scar diameter (WSD) values were 0.068 and 495 μm, respectively, when 0.05 wt% of Cu(ReO 4 ) 2 /Gr was added. Additionally, the graphene accelerated friction-induced heat transfer, which led to decreased friction and wear. The results of reciprocating friction experiments at elevated temperatures revealed that the Cu(ReO 4 ) 2 /Gr additive had excellent friction-reduction properties when the temperature was high. This could be attributed to the generation of a protective layer containing tribo-oxides from the alloy, some residual carbides and copper perrhenate induced by friction heat and stress. This protective layer was uniformly and stably covered on the worn surface, which could effectively alleviate direct contact between the rubbing pair.
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Journal of Materials Chemistry A
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2021
·Vol. 9
·期 18
·11241-11247
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IF 12.732
Dawei Ding,Hu Wu,Xiaoping He,Fan Yang,Chuanbo Gao,Yadong Yin,Shujiang Ding
Solar steam generation is an attractive technology for harvesting solar energy. Many efforts have been devoted to developing absorbers with increased solar energy absorption efficiency. However, little attention has been paid to the thermal radiation loss of the absorbers, which is equally important for achieving high solar-steam efficiency. To address this issue, herein, we report a solar harvesting strategy by introducing a nickel-nanoparticle-based spectrally selective absorber that possesses high and broadband absorption in the solar irradiation region but minimal thermal emittance at long-infrared wavelengths. Nickel nanoparticles are encapsulated in silica and carbon nanoshells, which are then assembled in an orderly manner on an infrared reflector to form a harvesting structure of graded refractive indices. As a result, high solar absorptance (α ≈ 0.93) but low thermal emittance (ε ≈ 0.096) has been achieved. An interfacial evaporation system with this unique absorber demonstrates a boosted water evaporation rate of 1.52 kg m−2 h−1 under 1 sun, which is ∼5 times the value for water alone, making it one of the best absorbers for solar steam generation applications. The combined advantages of high efficiency and durability suggest its potential for industrial water purification and desalination applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Liangzhong Li,Chang Liu,Ruixue Ma,Yunjiang Yu,Zhaofeng Chang,Xiaohui Zhang,Chenyu Yang,Da Chen,Yang Yu,Wei Li,Yongdi Liu
In this study, Fe 3 O 4 @TiO 2 decorated reduced graphene oxide (RGO) nanosheets were synthesized by loading iron oxide on the surface of RGO nanosheets and subsequently coating by titanium oxide, which can be employed as the persulfate (PS) activator and high-performance adsorbent toward thallium (Tl). PS could be effectively activated by the Fe 3 O 4 @TiO 2 decorated RGO nanosheets due to the presence of RGO and Fe(II), resulting in the rapid oxidation of Tl(I) to Tl(III). The removal of Tl(I) was found to be pH-dependent, with the removal efficiency of more than 88.5% in the pH range of 8.0–12.0 at the optimal PS dosage of 10 mM and material dosage of 0.2 g/L. The surface precipitation of Tl 2 O 3 and enhanced adsorption affinity toward Tl were deduced to be main mechanisms for the extremely efficient removal of Tl(I) ions during the oxidation and adsorption hybrid process. The maximum removal capacity of the material at pH 8.0 was estimated as 673.2 mg/g based on the fitting result from the Langmuir model. Approximately 94.7% of ultimate removal capacity could be accomplished within the first 10 min at the initial Tl concentration of 8.5 mg/L. The PS catalytic oxidation coupled with the adsorption technique using the prepared Fe 3 O 4 @TiO 2 decorated RGO nanosheets were proven to be a promising approach for Tl(I) removal from water.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Meesam Ali,Muhammad Tariq,Yong Sun,Jingyao Huang,Xiaogang Gu,Sana Ullah,Muhammad Asif Nawaz,Zhengyuan Zhou,Ali Shan,Muhammad Danish,Shuguang Lyu
Carbonaceous materials (CMs) have been applied extensively for enhancing the catalytic performance of environmental catalysts, however, the self-catalytic mechanism of CMs for groundwater remediation is rarely investigated. Herein, we unveiled the catalytic ability of various CMs via Fe(III) reduction through polyvinyl alcohol-coated calcium peroxide nanoparticles (PVA@nCP) for trichloroethylene (TCE) removal. Among selected CMs (graphite (G), biochar (BC) and activated carbon (AC)), BC and AC showed enhancement of TCE removal of 89% and 98% via both adsorption and catalytic degradation. BET and SEM analyses showed a higher adsorption capacity of AC (27.8%) than others. The generation of solution-Fe(II) and surface-Fe(II) revealed the reduction of Fe(III) on CMs-surface. The role of O-containing groups was investigated by the FTIR technique and XPS quantified the 52% and 57% surface-Fe(II) in BC and AC systems, respectively. EPR and quenching tests confirmed that both solution and surface-bound species (HO•, O 2 − • and 1 O 2 ) contributed to TCE degradation. Acidic pH condition encouraged TCE removal and the presence of HCO 3 − negatively affected TCE removal than other inorganic ions. Both schemes (PVA@nCP/Fe(III)/BC and PVA@nCP/Fe(III)/AC) exhibited promising results in the actual groundwater, surfactant-amended solution, and removal of other chlorinated-pollutants, opening a new direction towards green environmental remediation for prolonged benefits.
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高影响因子
ADVANCED ENGINEERING MATERIALS
·
2021
·Vol. 23
·期 7
·2001429
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IF 3.862
Haopeng Wang,Lixin Wu,Lingyun Xu,Longhui Zheng,Yadong Wu,Kechen Wu,Jianlei Wang,Qinhui Chen
3D interconnection structures are preconstructed by the hydrothermal method, which is considered an effective way to prepare conductive polymers. However, the fabrication of conductive composites to meet the application remains a challenge for relatively low conductive filler content. Herein, a 3D interconnection network is designed by combination of 2D functionalized graphene oxide (FGO), 1D acidified carbon nanotube (ACNT), and 0D copper element to establish conductive aerogel, which is used as reinforcement to prepare conductive FGO-ACNT/epoxy nanocomposites. Both elementary Cu and crisscrossed ACNT act as bridges among graphene nanosheets, which is beneficial to electron or phonon conduction, making the nanocomposites possess high-efficiency electric heating performance and temperature stability. Its electrical conductivity reaches 3.33 S m −1 with only 1.1% of FGO-ACNT, and the temperature quickly reaches up to 344 °C at the voltage of 9 V within 73 s. Importantly, the FGO-ACNT/epoxy nanocomposite shows prompt heat-responsivity, and it can heat up to 60 °C within 7 s from room temperature. When the FGO-ACNT/epoxy nanocomposite is used as a hyperthermia equipment, it exhibits excellent electrical conductivity, prompt heat-responsivity, and good temperature stability. These excellent properties make it possible to be used as a physical therapy device to help human health.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Hongyu Cen,Zhenyu Chen
Functionalized graphene oxide (FGO) were synthesized and investigated as corrosion inhibitors of carbon steel in this research. The inhibition behavior of FGO in CO 2 -saturated NaCl solution was studied via weight loss, surface characterizations, and electrochemical measurements. Results confirm that FGO could protect metal effectively and the inhibition efficiency showed the extreme effect as the increase of FGO concentration, reaching a maximum of 83.4% at 20 mg/L. FGO can adsorb on carbon steel via the functionalized groups and form the hydrophobic cover layer on the metal surface by the lamellar nanoparticles.
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ACS Nano
·
2021
·
IF 15.881
Xiaodong Zhu,Ziyi Cao,Wenjie Wang,Haijing Li,Juncai Dong,Shangpeng Gao,Dongxiao Xu,Lei Li,Jianfeng Shen,Mingxin Ye
Mn-based aqueous zinc-ion batteries (ZIBs) are promising candidate for large-scale rechargeable energy storage because of easy fabrication, low cost, and high safety. Nevertheless, the commercial application of Mn-based cathode is hindered by the challenging issues of low rate capability and poor cyclability. Herein, a manganese–vanadium hybrid, K–V2C@MnO2 cathode, featured with MnO2 nanosheets uniformly formed on a V2CTX MXene surface, is elaborately designed and synthesized by metal–cation intercalation and following in situ growth strategy. Benefiting from the hybrid structure with high conductivity, abundant active sites, and the synergistic reaction of Mn2+ electrodeposition and inhibited structural damage of MnO2, K–V2C@MnO2 shows excellent electrochemical performance for aqueous ZIBs. Specifically, it presents the high specific capacity of 408.1 mAh g–1 at 0.3 A g–1 and maintains the specific capacity of 119.2 mAh g–1 at a high current density of 10 A g–1 in a long-term cycle of up to 10000 cycles. It is superior to almost all reported Mn-based cathodes for ZIBs in the aqueous electrolyte. The superior electrochemical performance suggests that the Mn-based cathode materials designed in this work can be a rational approach to be applied for high-performance ZIBs cathodes.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Nai Shi,Yun Xie,Yi Yang,Daoming Huan,Yang Pan,Ranran Peng,Changrong Xia,Chusheng Chen,Zhongliang Zhan,Yalin Lu
Direct utilization of methane in solid oxide fuel cells (SOFCs) is greatly impeded by the grievous carbon deposition and the much depressed catalytic activity. In this work, a promising anode, taking finger-like porous YSZ as the anode substrate and impregnated Ni0.08Co0.02Ce0.9O2−δ@Ni0.8Co0.2O as the novel catalyst, is fabricated via the phase conversion-combined tape-casting technique. This anode shows commendable mechanical strength and excellent catalytic activity and stability toward the methane conversion reactions, which is attributed to the exsolved alloy nanoparticles and the active oxygen species on the reduced Ni0.08Co0.02Ce0.9O2−δ catalyst as well as the facilitated methane transport rooting in the special open-pore microstructure of the anode substrate. Strikingly, this button cell delivers an excellent peak power density of 730 mW cm–2 at 800 °C in 97% CH4/3% H2O fuel, only 9% lower than that in 97% H2/3% H2O. Our work shed new light on the SOFC anode developments.
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JOURNAL OF MEMBRANE SCIENCE
·
2021
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IF 8.742
Yuefei Song,Yongxin Wang,Nan Zhang,Xifan Li,Xueshuang Bai,Tiemei Li
This present work validated the feasibility of high-efficient removal of series of cationic small-sized contaminants such as pharmaceutically active compounds (PhACs), dyes and hardness-forming ions in aqueous solution by novel thin-film nanocomposite (TFN) membranes. Thanks to the positively participated effect on interfacial polymerization for both nanostructured quaternized carbon-based nanoparticles (QCBNPs), skin-layer characteristics including smoothness, wettability and positive charge as well as nanoporous loose body (porosity, thickness) of the resultant TFN membranes were all markedly improved after doping modification. On this basis, compared with the neat thin-film composite membrane , these modified TFN membranes showed perfect mirror-symmetric transformation in the rejection orders of the selected electrolytes, dyes and PhACs with different charge properties, respectively. Of course, these changes were all accomplished in the process of increasing each small-sized contaminant removal rate, membrane permeability and fouling resistance. Specifically, the optimal TFN-QCQDs membrane possessed high permeate flux of 23.8 L m −2 ·h −1 bar −1 , 99.7%, 99.5%, 98.9%, 98.4% and 95.7% rejection rates for cationic trimethoprim, atenolol, rhodamine B, methylene blue and MgCl 2 , flux recovery ratio of 85.5%, which increased by 53.6%, 6.75%, 5.96%, 2.17%, 2.21%, 17.0% and 29.6%, respectively, compared with the neat membrane. In brief, both QCBNPs embedded nanocomposite membranes provide good alternative options for efficient and sustainable removing series of cationic small-sized contaminants by one step.
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