Journal of Materials Chemistry A
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2022
·Vol. 10
·期 29
·15485-15496
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IF 14.511
Le Geng,Lele Li,He Zhang,Minjuan Zhong,Peng Mu,Jian Li
Solar-driven interface water evaporation has been demonstrated to be one of the most promising technologies for alleviating global water pollution and water shortage. Although significant advances have been achieved for improving the solar-to-vapor efficiency, the design and fabrication of an all-day solar steam generator with highly efficient evaporation performance still remains a challenge due to the day/night cycle. Herein, we report a novel solar-driven interfacial evaporator composed of a polypyrrole impregnated nylon thread as the photothermal layer and octadecane/carbonized polypyrrole nanotube aerogel composite materials as the photothermal energy storage device to achieve highly efficient all-day solar steam generation. By the combination of photothermal conversion and photothermal energy storage, the as-prepared solar steam evaporator achieves a high evaporation rate of 2.62 kg m−2 h−1 and excellent solar-to-vapor efficiency of 92.7% under 1 kW m−2 illumination. Moreover, the evaporator exhibits excellent salt resistance and there was no obvious salt precipitation observed with 6 h continuous evaporation in 3.5% NaCl aqueous solution. Besides, in the outdoor experiment, the evaporator shows high water production of 8.42 L m−2 in the daytime and 1.22 L m−2 in the nighttime. The findings of this work may provide a novel strategy for the fabrication of the all-day solar-driven interface water evaporation device to mitigate freshwater scarcity, and meanwhile this work lays the foundation for breaking the restriction of the day/night cycle during the solar steam generation process.
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-15
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IF 9.429
Xu Xiao,Mao Huafen,Wu Yunchao,Liu Suwan,Liu Jingjin,Li Qianzhe,Yang Mengyu,Zhu Jinqian,Zou Shengqiang,Du Fengyi
Background Phototherapy-triggered immunogenic cell death (ICD) rarely elicits a robust antitumour immune response, partially due to low antigen exposure and inefficient antigen presentation. To address these issues, we developed novel methylene blue-loaded ovalbumin/polypyrrole nanoparticles (MB@OVA/PPY NPs) via oxidative polymerization and π–π stacking interactions.Results The as-prepared MB@OVA/PPY NPs with outstanding photothermal conversion efficiency (38%) and photodynamic properties were readily internalized into the cytoplasm and accumulated in the lysosomes and mitochondria. Upon 808 nm and 660 nm laser irradiation, the MB@OVA/PPY NPs not only ablated tumour cells by inducing local hyperthermia but also damaged residual tumour cells by generating a large amount of reactive oxygen species (ROS), finally triggering the release of many damage-associated molecular patterns (DAMPs). Moreover, the MB@OVA/PPY NPs synergized with DAMPs to promote the maturation and improve the antigen presentation ability of DCs in vitro and in vivo.Conclusion sThis work reported a PPY NPs-based nanoplatform to encapsulate the therepeutic proteins and absorb the functional molecules for combination therapy of tumours. The results demonstrated that the prepared MB@OVA/PPY NPs could be used as effective nanotherapeutic agents to eliminate solid tumours and trigger a powerful antitumour immune response.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Fen Zhang,Luyao Xi,Meiqi Zhao,Yaguang Du,Liying Ma,Shaohua Chen,Hengpeng Ye,Dongyun Du,Tian C. Zhang
Easily agglomeration of polypyrrole (PPy) significantly limits its practical applications. In this study, natural pyrite (NP) was applied to disperse PPy and overcome this agglomeration; a novel composite of PPy/NP was synthesized and applied for the efficient removal of hexavalent chromium [Cr(VI)] from aqueous solutions. Results showed that the PPy/NP composites exhibited better Cr(VI) removal performance than PPy alone. This enhanced removal capacity is attributed to the addition of NP, which prevents PPy agglomeration and reduces Cr(VI) to trivalent chromium[Cr(III)]; Cr(VI) removal was significantly dependent on the solution’s pH. The sorption kinetics of Cr(VI) with PPy/NP was described by the pseudo-second-order model and Elovich models, which highlight the chemicalsorption process. The sorption isotherm was well simulated by Langmuir model and the maximum adsorption capacity of Cr(VI) on PPy/NP was 261.78–395.26 mg/g at 303 – 323 K, which is significantly higher than that of PPy alone (124.84–194.17 mg/g). Thermodynamic analyses confirmed that this adsorption process was spontaneous and endothermic. PPy/NP composites could be used as a recyclable absorbents for four Cr(VI) reduction cycles without any evident loss in adsorption performance. The mechanism Cr(VI) removal by PPy/NP composites is attributed to ion exchange (9.47 %), adsorption (31.03 %), and reduction (59.50 %).
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Surfaces and Interfaces
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2022
·
IF 6.137
Ting-Ting Li,Xiangdong Fu,Xuefei Zhang,Bing-Chiuan Shiu,Jia-Horng Lin,Ching-Wen Lou
To fulfill the growing demand for durable and deformable flexible wearables, this study proposes a fibrous zinc ion battery negative electrode that is low-cost, easy to prepare, and similar to the flexible yarn. We have constructed a new type of carbon fiber/polyacrylonitrile(PAN)/polypyrrole(PPy) Zn electrode (CPP@Zn yarn electrode). Based on carbon fiber yarn, PAN wrapped carbon yarn (CP yarn) was prepared by electrospinning. PPy nanoparticles were deposited on CP yarn by in-situ polymerization to get the highly conductive yarn (CPP yarn). Finally, Zn is deposited on the CPP yarn by electrodeposition to obtain the CPP@Zn yarn electrode. When the deposition voltage is 1 V and the time is 30 min, the flexibility and the Zn crystal morphology of the CPP@Zn yarn electrode are the best, the specific capacity is the highest. When the current density is 0.04 A·cm −1 , the specific capacity can reach 981.3 mF·cm −1 and the energy density is 0.18 W·h·cm −1 . After cyclic charge and discharge repeated 300 times, 87.76% of the original specific capacity can still be maintained. After bending the CPP@Zn yarn electrode for 500 times, the specific capacitance can still maintain 86.13% of the original specific capacitance. The yarn electrode has excellent electrochemical stability and flexibility, and it has broad application prospects in wearable smart textiles .
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Journal of Energy Storage
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2022
·
IF 8.907
Juguo Dai,Xiaohong Wang,Long Xia,Lili Luo,Dongxu Li,Chunying Yang,Yiting Xu,Lizong Dai
Undesirable energy density and storage ability hinder the pure carbon-based symmetric supercapacitor commercial application. Constructing hierarchical pore structure carbon material is expected to overcome this challenging issue. How to effectively reduce the multi-step and improve efficiency is worthy of in-depth study. Herein, a template-free strategy is proposed to construct N-doped hollow carbon sphere, combining a pore-forming agent and alkali treatment to build a hierarchical pore structure. Investigating the various pore structure contents in carbon spheres reveals its effect on the capacitive performance of as-prepared samples. From the robust walls structure (~50 nm) and rational micropores proportion (68.3 %), HCZK carbon sphere is equipped with a specific capacitance of 550.6 and 273.3 F g −1 in acidic and alkaline electrolyte , respectively, at a current density of 1 A g −1 . After 10,000 cycles charge/discharge test, the specific capacitance of HCZK sample does not lose in acidic electrolyte, and 4.1 % in alkali electrolyte. Symmetric supercapacitors assembled by HCZK carbon sphere deliver a specific capacitance of 247.1 F g − 1 at 1 A g −1 , outstanding coulombic efficiency of 100 % after 10,000 cycles and excellent energy density of 87.8 Wh kg − 1 at a power density of 1288.0 W kg − 1 . Achieve the above excellent properties can be attributed to the synergistic effect of rational pore structure and surface chemical composition. This work will reveal the contribution of micropores to the electrochemical of carbon materials and provide a reference for selecting electrolytes.
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Nanomaterials
·
2022
·Vol. 12
·期 15
·2698
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IF 5.719
Huiling Gu,Ji Huang,Na Li,Hua Yang,Yin Wang,Yang Zhang,Chengjun Dong,Gang Chen,Hongtao Guan
The moderation of the dielectric properties of polymer composites and their environmental stability need to be considered comprehensively in the design of microwave-absorbing materials. In this work, polypyrrole/polystyrene (PPy/PS) composited particles were synthesized through a facile in situ bulk polymerization procedure. The PS component can be modulated conveniently by controlling the polymerization time. FTIR and Raman analyses disclosed that the PS component was immobilized in PPy via covalent bonds. The electromagnetic characterization results indicated that the dielectric properties and, thus, the microwave absorption could be controlled when the styrene polymerization was prolonged from 6 h (PPy-6) to 19 h (PPy-19). The composite PPy-19 displayed an optimal reflection loss of −51.7 dB with a matching thickness of 3.16 mm, and the effective absorption bandwidth (EAB) even reached 5.8 GHz at 2.4 mm. The PS component endowed PPy/PS composites with more robust environmental stability than homogeneous PPy. After being exposed to air for 365 days and hydrothermally treated at 100 °C for 12 h, PPy-19 still exhibited a reflection loss superior to −20 dB. The present work provides a new insight into the adjustment of the electromagnetic properties of PPy composites to fabricate high-performance microwave absorbers with superior environmental stability.Keywords:microwave absorption;polypyrrole composite;polystyrene;in situ bulk polymerization
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 34
·17544-17551
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IF 14.511
Xinyan Zhuang,Hongrun Jin,Boyang Yu,Hui Wang,Yongxin Luo,Kaisi Liu,Bin Hu,Kefeng Xie,Liang Huang,Jiangjiang Duan,Jun Zhou
Thermoelectrochemical cells (TECs) are promising and cost-effective for harvesting low-grade heat. However, the low efficiency hinders their practical application. Here, a multi-level three-dimensional carbon electrode was designed for high-efficiency TECs. The composite electrode is prepared by loading nitrogen-doped carbon nanowires on carbon cloth fibers (N–CNW@CC); it improves the transition kinetics of Fe(CN)63−/Fe(CN)64− and accelerates the ion transmission simultaneously. As a result, the output current of the N–CNW@CC based TEC is 26.3% higher than that of the initial CC. Upon combining it with an optimized thermosensitive crystallization-boosting electrolyte, the Carnot-relative efficiency of the N–CNW@CC based TEC reaches up to 13.02%, which is the highest efficiency ever reported. In addition, a simple pack of a series of TECs can drive a commercial timer to work for an hour continuously. This N–CNW@CC electrode holds great potential to realize the commercial application of TECs.
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ANALYTICAL CHEMISTRY
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2022
·
IF 8.008
Zhengang Han,Juxia Wang,Peiyao Du,Jing Chen,Shuhui Huo,Huixia Guo,Xiaoquan Lu
Owing to their almost similarities in size, shape, and chemical reactivity, effectively distinguishing deuteroxide (D2O) in water (H2O) remains an ongoing challenge, and the examples of a D2O probe are still quite scarce. Herein, since H2O can decrease the lifetime of a singlet oxygen as a vital intermediate and an H/D exchange in the luminescence process of porphyrins, we systematically investigated the enhanced ultraviolet–visible (UV–vis), photoluminescence (PL), and electrochemiluminescence (ECL) of water-soluble tetrakis(carboxphenyl)porphyrin (TCPP) in D2O. The findings showed that these luminescent properties had been greatly enhanced with the increase of the D2O fraction in water. Consequently, we first developed the highly facile methods of detecting D2O in H2O by the UV–vis, PL, and ECL of TCPP, respectively. Impressively, the ECL analysis exhibited a great superiority with a lower detection limit of 0.29 nM. The work not only achieves the challenging task of distinguishing between H2O and D2O but also provides a unique strategy to enhance the luminescent performance of porphyrin.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Wentao Zheng,Guibing Xia,Guangwen Yu,Qian Cai,Xiankun Wu,Weizhong Shi
A series of low viscous deep eutectic solvents composed of 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) and N-heterocyclic compounds were designed and synthesized as NO trapping agents. These DESs exhibited low viscosity of 10.02 mPa·s and excellent NO absorption capacity up to ∼ 5.10 mol·kg −1 at 293.2 K and atmospheric pressure. The N-heterocyclic compounds were found to play a dominant role in the absorption, and the absorption behavior could thus be adjusted by the molar ratio of DBU to N-heterocyclic compounds. With the assumption of complex formation between NO and DESs, the reaction equilibrium thermodynamic model (RETM) was developed to correlate the experimental solubilities of NO. The thermodynamic parameters, such as the equilibrium constant K , the Henry’s constant H and the enthalpy change Δ H , were thus calculated to evaluate the absorption process. In addition, through a combination of the experimental absorption capacities, the RETM modeling results and the spectroscopic investigations, it was proposed that the absorption of NO in the DBU-based N-heterocyclic DESs was governed by the chemical interaction between NO and the N atom on the N-heterocyclic compounds with the reaction stoichiometry of 1:1.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
·
IF 9.463
Ting Liu,Na Zhang,Kaili Zhang,Yan Wang,Yiming Qi,Meng Zong
Two-dimensional layered metal carbides (MXene) have a broad application prospect in electromagnetic absorption, but suffer from poor impedance matching, which limits the absorbing performance. Herein, an efficient nanocomposite absorber was successfully prepared via loading Co-substituted β 2 -keggin-type polyoxometalate doped with polypyrrole and Fe 3 O 4 on the surface of MXene . Polyoxometalate and HCl as a proton acid doped polypyrrole, with anions attached to the main chain, could adjust the electromagnetic parameters, making the nanocomposites material easily achieve the best conductivity and impedance matching; Fe 3 O 4 introduced magnetic loss, and the freedom of movement of Fe 2+ and Fe 3+ caused multiple polarization; dipole polarization was induced by defects, dipoles and dangling bonds in nanocomposites; the charge accumulated at the three phase interface and led to interfacial polarization. We had conducted research on the absorbing properties of nanocomposites with different as-prepared unitary to ternary products, loading rates and component proportion. When the filling level was 45 wt%, an optimal reflection loss value of MXene/PPy@β 2 -SiW 11 Co/Fe 3 O 4 nanocomposites at only 1.7 mm reached up to −62.6 dB, and the effective absorption bandwidth of 9 GHz could be obtained at the low thickness range of 1.5–2.9 mm. These results demonstrated that the prepared nanocomposites were expected to be a promising electromagnetic wave absorber with thin thickness and high absorption intensity.
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Chiyu Fu,Kai Wang,Wenyang Tang,Azadeh Nilghaz,Christopher Hurren,Xungai Wang,Weilin Xu,Bin Su,Zhigang Xia
Soft actuators, particularly pneumatic artificial muscles (PAMs), have been widely applied to construct soft robotics owing to their superiorities of inherent compliance, lightweight, and high force density. However, it is still challenging to endow the PAMs with sensing capabilities towards unknown and complex environments due to their compliant mechanism and system. Herein, inspired by the skeletal muscle and skin, a novel multi-sensorized pneumatic artificial muscle yarn (mPAMy) is fabricated for multimodal proprioceptive sensing by a combination of textile braiding technology and hierarchical manufacturing method. The results and finite-element analysis reveal that the soft mPAMy have the endowed sensing capabilities towards diverse forces, including self-contraction, strain and vertical pressure. The mPAMy can detect force changes ranged from 0 N to 14 N by the yarn relative resistance change from 0 to 14.0%. Contractile sensing exhibits an increased range of resistance change (0–20.1%) compared with force sensing (0–14.0%), resulting in a greater resolution of 0.34% pressure to present change in resistance. In addition, the strain of mPAMy ranged from 0 to 57% can be stably detected. The excellent and durability pressure sensing merits of mPAMy can be ascribed from the change in resistance due to the PPy layer fracture. Furthermore, in several proof-of-concept attempts, the prepared mPAMy successfully detected precise signals of human motion and provided effective feedback during actuation. This approach opens a reliable strategy for PAMs towards multimodal sensing strategies in the healthcare, transportation and wearable electronics.
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DESALINATION
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2022
·
IF 11.211
Ruonan Gu,Zhen Yu,Yi Sun,Yuqing Su,Wei Wu,Shaoan Cheng
Zero liquid discharge (ZLD) of high-salinity brine has attracted increasing attention recently. Interfacial solar crystallizers , which employ solar-driven water evaporation for salts crystallization from the near-saturation brine to achieve ZLD, are promising in ZLD due to low energy consumption and cost. However, many interfacial solar crystallizers were only used to treat high-salinity NaCl solution in the past while probably failing when treating high-salinity concentrated seawater. Here we explored the failure mechanism of the solar crystallizers in the high-salinity concentrated seawater and proposed a novel strategy to stably treat high-salinity concentrated seawater by combining a solar crystallizer with antiscalant (Nitrilotriacetic acid, NTA), taking Janus 3D solar crystallizer (Janus-3DSC) as an example. Janus-3DSC exhibited a stable average evaporation rate of 2.29 ± 0.36 kg m −2 h −1 under 1.5 sun in the 20.0 wt% concentrated simulated seawater containing NTA. The large-size Janus-3DSC could treat 20.0 wt% concentrated natural seawater containing NTA outdoors with a salt recovery rate of 11.27 kg m −2 day −1 and an evaporation rate of 18.63 kg m −2 day −1 . We believe that this work would provide a novel and effective way to achieve effective and eco-friendly ZLD of high-salinity concentrated seawater, even other high-salinity brine.
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