INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2022
·Vol. 46
·期 11
·15043-15053
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IF 4.672
Ming Li,Zhenning Zhang,Fan Yang,Weiming Wang,Shuai Peng,Xixian Yang,Jun Xiong,Xue Min
Summary Interface solar evaporator has been recognized as a potential device for extracting freshwater from non-potable water. Biomass like daikon is an excellent candidate for fabricating solar evaporators because of its good hydrophilia and porous structure, which facilitates water transfer and vapor release. Besides, polymers like polydopamine and polypyrrole (abbreviated as PDA and PPy, respectively) possessing wide spectrum absorption are fascinating candidates for efficient solar evaporators. Herein, PDA-decorated daikon and PPy-decorated daikon (abbreviated as PDA-DK and PPy-DK, respectively) solar evaporators have been developed for vapor production. Due to polyethylene foam can effectively concentrate the heat on the photothermal materials, under 1-solar intensity, the water vaporization rates of PDA-DK and PPy-DK are enhanced to 1.50 and 1.60 kg m −2 h −1 , and the relative solar thermal efficiencies are improved by about 40%, from 49.51% and 58.65% to 89.01% and 98.97%, respectively. Thanks to the super hydrophilicity and high water storage capacity, the PPy-DK has the self-cleaning ability and can effectively desalinate seawater with a desalination rate of around 1.6 kg m −2 h −1 . Moreover, both solar evaporators exhibit considerable stability in evaporation rate, with no significant changes within 15 cycles. Outdoor experiments demonstrate that these two solar evaporators are capable of desalinating saltwater and cleaning dye wastewater.
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CHEMOSPHERE
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2022
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IF 8.943
Wei Mao,Ying Zhang,Jinen Luo,Lingtiao Chen,Yuntao Guan
It is still a huge challenge to prepare cheap and effective composite materials for removing hexavalent chromium (Cr(VI)) in sewage treatment . In this study, a noval co-polymerization of polypyrrole/polyaniline on ferrate modified biochar (Ppy/PANI/FBC) was fabricated via ferrate-promoted pyrolysis and in-situ oxidative polymerization of pyrrole and aniline molecules to effectively remove Cr(VI) from polluted water. The Ppy/PANI/FBC quickly decreased Cr(VI) concentration from 38.92 to 3.92 mg/L within 400 min, with an efficient removal efficiency (89.92%), which was significantly higher than that of FBC (4.75%), Ppy/FBC (72.30%), and PANI/FBC (42.43%). These results are mainly caused by its conjugated connection and well-dispersion of Ppy and PANI on the surface of a carbon-based material. Meanwhile, the experimental results were in line with the pseudo-second-order kinetic and Freundlich models. The Ppy/PANI/FBC is featured by a high capacity of Cr(VI) adsorption (up to 203.71 mg/g). In addition, it could be adopted for efficiently removing Cr(VI) over a wide pH range (4–9) because of the positively charged nitrogen (–NH .+ – and = N + –). The sorption mechanisms of Cr(VI) were identified, including electrostatic interaction with surface protonated nitrogen (N + ), ion exchange between the doped Cl − ions and Cr(VI), chemical decrease of the Cr(VI) to Cr(III) by the iron valence cycle and efficient electron transfer of Ppy/PANI/FBC, as well as surface complexation by amine and oxygen-containing groups. More importantly, 97.98% Cr(VI) was efficiently removed in 20 min by coupling a photocatalytic reaction, also providing a novel idea for the practical use of adsorbents in wastewater treatment .
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2022
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IF 4.52
Yanping Wei,Yiyong Wu,Jinxia Feng,Jun Liu,Yaling Tian,Jingyun Xiao,Quanguo He
The novel binary metal oxide cerium molybdate (Ce 2 Mo 3 O 13 ) as a promising strategy can be combined with MWCNTs for the development of ultrasensitive sensors. Herein, a pod-like Ce 2 Mo 3 O 13 was prepared, characterized, and used to construct a molecularly imprinted sensor (MIPs) for detection of ponceau 4 R as low as to nanomolar concentration. The results demonstrate that the electrochemical response at the specific hybridized electrode of MIPs/Ce 2 Mo 3 O 13 -MWCNTs/GCE is stronger than non-molecularly imprinted ones (NIPs). It indicates a synergistic effect resulting from the hybridized Ce 2 Mo 3 O 13 -MWCNTs combination and modification to the electrode. Under optimal conditions, the calibration curve is in the range of 10 nmol L −1 to 1 μmol L −1 , with a limit of detection of 7 nmol L −1 for ponceau 4 R determination. The excellent sensitivity, reproducibility, and selectivity of the new sensor provide an accurate and facile avenue for ultrasensitive ponceau 4 R detection in different samples.
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CHEMICAL PHYSICS LETTERS
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2022
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IF 2.719
Jing Li,Mengjie Cui,Li Wang,Aiqin Zhang,Yi Chen,Jun Xiang,Haojun Fan
A flexible nonionic waterborne polyurethane/polypyrrole/silver nanowires (NWPU/PPy/AgNWs) coating film with high-efficient electromagnetic interference shielding effectiveness (EMI SE) was achieved by in-situ polymerization followed by mixing with AgNWs dispersion, via casting method. The SE of NWPU/PPy film without AgNWs is 15 dB with a thickness of 1.6 mm. When the loading of AgNWs is 40 wt%, the conductivity of resultant film with a thickness of 0.48 mm reaches 1026.1 s. m −1 , and the SE increases to 64.2 dB. Furthermore, this flexible coating film shows excellent EMI shielding reliability to resist bending and ultrasonic water washing.
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ACS Applied Nano Materials
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2022
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IF 6.14
Shengqi Lu,Bo Ouyang,Songmao Han,Fengyu Qiao,Kai Chen,Fan Wu,Aming Xie,Erjun Kan,Haibo Zeng
With the development of electronic technology, flexible electromagnetic wave shielding materials have attracted considerable interests in various fields. However, multifunctional electromagnetic wave shielding materials with great flexibility, excellent efficiency, environmental-friendliness, and corrosion resistance are urgently needed to be investigated. Although several works have achieved such frameworks, the extremely complicated fabrication procedure largely restricts their broad application. Accordingly, we deliver a facile strategy to achieve flexible polypyrrole nanotube–polyethylene glycol–polyvinyl alcohol hydrogel (PPPg) for enhanced electromagnetic shielding behaviors. The shielding effectiveness of the prepared hybrid with a thickness of 2 mm can reach 21 dB from 8 to 12 GHz. Additionally, such a film provides excellent flexibility with an elastic deformation of 100.9% at 2.28 MPa. H-plasma processing further leads to the hydrophobic feature of the PPPg hydrogel, promoting its great corrosion resistance in the natural environment. Our hydrogel is expected to become a promising multifunctional flexible nanocomposite hydrogel for high-performance wearable devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yanqiu Zhang,Fan Yang,Songhe Qin,Junhui Huang,Xuyou Yang,Wenguang Wang,Yangxue Li,Chunrui Wu,Lu Shao
Nanofiltration with precise separation ability demonstrates the increasing importance in water treatment and high-value substance recycling compared with traditional energy-intensive separation technologies. Nevertheless, nanofiltration membranes still suffer from the permeance-selectivity “trade-off” issue. Herein, we designed the de novo nanofiltration membrane with enhanced separation performance by adopting deprotonated tannic acid (TA) as intermediate layer to tune pyrrole polymerizaiton for forming the polypyrrole selective layer. TA were coated followed by in-situ polymerization of pyrrole and they assembled based on the strong electrostatic and hydrogen bonding interaction. The deprotonation of phenolic hydroxyl groups in TA effectively regulated the polymerization process of pyrrole to obtain the synthesized nanofiltration membrane with the average pore diameter of 0.45 nm. The optimized nanofiltration membrane exhibited a 3.7-fold increase in permeance and almost complete rejection for various dyes with different molecular weights and charges, which breaks the permance-selectivity “trade-off”. In addition, the synthesized membrane possessed the excellent structural stability even in polar organic solvent of tetrahydrofuran. Our new strategy for constructing high-performance nanofiltration membrane via intermediate-layer-tuned formation/polymerization of the selective layer can provide an alternative potential avenue to fabricate next-generation molecular separation membranes towards environmental remediation and resource recovery.
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APPLIED CATALYSIS A-GENERAL
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2022
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IF 5.723
Hao Liu,Yajun Fu,Xin Wang,Weiping Luo,Weijun Yang
By encapsulating metal nanoparticles (NPs), the synergistic effect between the metalloporphyrins and the metal nanoparticles in metalloporphyrin organic frameworks (P-MOFs) can boost its catalytic performance. The self-coupling reaction of terminal alkynes is a kind of important organic reaction and can take place with the aid of the catalyst. A nanorod-like metal-organic skeleton PCN-222(Cu) with carboxy porphyrins as ligands was synthesized as the precursor. By a double-solvent approach, the composite catalysts with varying copper nano-loadings in PCN-222(Cu) pores were obtained. Among them, 1.9 wt% of Cu NPs in Cu@PCN-222(Cu) has excellent catalytic activity and stability for the self-coupling reaction of terminal alkynes. PCN-222(Cu) can stabilize the Cu NPs, control the size selectivity and crystal form. The copper porphyrins and Cu NPs in Cu@PCN-222(Cu) both serve as the catalytic active sites. This strategy, which using porphyrin-structured MOFs to construct dual active sites with the same element, has promising applications in MOFs catalysis.
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ENVIRONMENTAL TECHNOLOGY
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2022
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IF 3.475
Mingxing Chen,Qinming Guo,Jinping Cui,Weiyang Lv,Yuyuan Yao
Developing high-performance adsorbent for hexavalent chromium (Cr(VI)) elimination presents an enticing prospect in environmental remediation. Herein, three-dimensional flowerlike nanospheres composed of molybdenum disulphide and polypyrrole (MoS2@PPy) were successfully prepared via a one-pot hydrothermal and subsequent carbothermal reduction process for the removal of Cr(VI). The effects of pH, adsorbent dosage, co-existing ions, initial Cr(VI) concentration and temperature were investigated systematically by batch experiments. Benefiting from the incorporation of MoS2, the obtained MoS2@PPy composites showed a dramatic increase of specific surface area (149.82 m2·g−1) and adsorption capacity (230.97 mg·g−1) when compared with the pure PPy nanoparticles. Based on the thermodynamics study and X-ray photoelectron spectroscopy analyses, the removal process of Cr(VI) was proved to be exothermic and spontaneous, and accessible under-coordinated Mo(IV) and pyrrolic N groups coupled with redox reactions were conducive to the efficient removal of Cr(VI). Attractively, the MoS2@PPy acted as the electron donor could also activate peroxymonosulphate for the efficient degradation of organic contaminants. These results suggested that the MoS2@PPy was promising in Cr(VI) elimination and other kinds of organic pollutants removal in wastewater.
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Frontiers in Bioengineering and Biotechnology
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2022
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IF 6.064
Yingjian Ma,Jing Mao,Haojie Qin,Pan Liang,Wenpeng Huang,Chenchen Liu,Jianbo Gao
The multifunctional theranostic nanoplatforms, which can realize changing the contrasts of medical images and enhance cancer therapies simultaneously, have attracted tremendous attention from chemists and medicine in past decades. Herein, a nanoscale metal–organic framework-based material was first synthesized and then decorated with platinum (NMOF545@Pt) successfully for multimodal imaging-guided synergistic cancer therapy. The obtained NMOF545@Pt is advantageous in shortening the longitudinal relaxation time (T1), enhancing photoacoustic effects, and elevating X-ray absorption efficiently. Thus, the enchantments of tripe imaging modalities, computed tomography (CT)/magnetic resonance imaging (MRI)/photoacoustic imaging (PAI), were realized with NMOF545@Pt administration simultaneously and can be cleared from the mice. Meanwhile, in vitro and in vivo experiments demonstrate that the synthesized NMOF545@Pt can dramatically increase photothermal therapy (PTT) and radiotherapy (RT) efficacy. Convincing evidence proves that tumor growth can be wholly inhibited without noticeable side effects or organ damage. The results demonstrated the promise of multifunctional nanocomposites NMOF545@Pt to improve biomedical imaging and synergistic tumor treatments.
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Journal of Cleaner Production
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2022
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IF 11.072
Wei Cui,Xiangxuan Li,Xinyi Li,Tianyu Si,Lin Lu,Ting Ma,Qiuwang Wang
The development of phase change materials (PCMs) is hampered by issues like leakage , poor thermal conductivity , and poor light absorption . In this study, we innovatively combined modified melamine foam (MF) and graphene nanoparticle (GNP) to address these defects of PCMs in the solar-thermal energy system. The MF was modified to endow the solar-thermal energy conversion ability and superhydrophobic interface characteristics due to the polypyrrole (PPy) by the in-situ polymerization and the polymerized octadecylsiloxane (PODS) layer coating on the sponge skeleton. The composite PCMs consisting of the modified MF, paraffin wax (PW), and GNP were fabricated and exhibited good leakproof ability, high thermal conductivity, and excellent solar-thermal energy conversion capability. Results showed that due to the effects of the PPy and the PODS on the sponge skeleton structure, MF@PPy-PODS/PW composite PCMs showed a decrease in the mass loss ratio to less than 0.34% and an increase in the thermal conductivity of 0.33 W/m·K and the solar-thermal storage efficiency of 75.68%. Besides, adding GNP with higher concentrations impacted positively on the thermal conductivity and the solar-thermal energy conversion ability but negatively on the phase change enthalpies . MF@PPy-PODS/GNP3/PW composite PCMs increased the thermal conductivity to 0.59 W/m·K and the solar-thermal storage efficiency to 79.36% while decreasing the phase change enthalpy to 130.61 J/g. Furthermore, a thermoelectric conversion system driven by solar energy was developed to show the potential of composite PCMs for cleaner energy production. The open-circuit voltages of the MF@PPy-PODS/GNP3/PW composite PCMs achieved 0.78 and 0.91 V at 2 and 4 Sun, respectively. The open-circuit voltages remained for a period of time and slowly dropped without the simulated solar light irradiation. This study provided a potential strategy for the optimal performance of composite PCMs and their application in solar thermal systems .
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JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Xiaoli Su,Dingyu Xing,Zi Song,Wenyi Dong,Mengdie Zhang,Liang Feng,Mingming Wang,Feiyun Sun
Anaerobic membrane bioreactor (AnMBR) with the application of electric field (EAnMBR) can alleviate fouling. However, an energy-efficient operation mode with good treatment and anti-fouling performance is still desired. This study explored the actual performance of EAnMBR under two electrical exposure modes, continuous electric field (CEF) and intermittent electric field (IEF). With the conductive ceramic membrane as cathode, the EAnMBR presented a significant improvement in fouling alleviation, total phosphorus removal efficiency, and methane yields under the appropriate electric field of 1.0V/cm. The IEF mode of 2min-on/8min-off mode could improve carbonate and nitrogenous removal efficiencies by facilitate microbial metabolism compared to CEF mode, and the discrepancy of phosphorus removal efficiency and methanogenesis between these two modes were only within 6%. Notably, its energy requirement was estimated to be one-fifth fold that of CEF. The overall antifouling mechanism was systematically unveiled under two operation modes. Long electrical stimulation time promotes electrostatic repulsion and electrocoagulation deposition for fouling control, particularly during the first stage of concentration polarization formation and particles deposition and during the second stage of particles attachment and dynamic fouling formation. These results proved that the IEF mode is feasible and effective in achieving stable EAnMBR effluent quality, mitigating fouling, and saving electrical energy for carbon peaking and neutrality goals.
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JOURNAL OF CHROMATOGRAPHY A
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2022
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IF 4.601
Shitao Feng,An Zhang,Fengshou Wu,Xiaogang Luo,Juan Zhang
This study constructed boronic acid grafted Zr-MOF (BA-Zr-MOF) by a simple pre-installation strategy through mixed organic ligands. Typically, BA-Zr-MOF was prepared by one-step hydrothermal method used for enrichment of cis -diol-containing nucleosides through pipette tip solid-phase extraction (PT-SPE) followed by detection of high-performance liquid chromatography. It is worth mentioning that BA is well assembled into MOF and cis -diol-containing compounds can be efficiently and selectively enriched by abundant boronic acid groups. Three groups of different types of compounds were used to evaluate their selectivity and the results showed the excellent selectivity to cis -diol-containing compounds of as-prepared adsorbent. The BA-Zr-MOF adsorbent possesses a high adsorption capacity, which can reach 86.40 mg g −1 for adenosine. Under the optimal extraction condition, a PT-SPE-HPLC method based on BA-Zr-MOF for analysis of nucleosides was established. The linear range of the four nucleosides is 0.01 to 50 µg mL −1 with R 2 ≥ 0.99 and the detection limits (LODs) are estimated at between 0.005-0.012 µg mL −1 . The recoveries in urine were used to test the reliability of the analytical methods, which ranged from 82.8% to 117.1%, with intra-day relative standard deviations (RSDs) ranged from 0.1% to 4.2% and the inter-day RSDs ranged from 0.2% to 6.2%. All the results show that the pre-installation strategy based on dual ligands is an alternative to fabricate MOF composite material and BA-Zr-MOF is a promising material for the analysis of cis -diol-containing biomolecules.
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