ACS Applied Polymer Materials
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2022
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IF 4.855
Shuai-Jun Guo,Hao-Yun Chang,Meng-Jia Xu,Chen-Xu Wang,Hua Wei,Dong-Dong Li,Jing Chen,Yang Zhou,Yi Liu
Flexible artificial skin sensors have been a hot research topic over the past 20 years due to their remarkable prospects in the fabrication of smart wearable devices. Normally, electronic skin sensors transmit signals via stretchy electrical conductors, and the manufacturing processes are more complicated, involving multiple steps. For the first time, this work reports a facile one-step fabrication of poly(sodium methacrylate-co-vinylimidazole)-Co2+ hydrogels with high mechanical strength, good elasticity, and excellent sensitivity that can be used as ionic skins (I-skins). In addition, mechanical analysis indicates that the designed hydrogels have enhanced strain and tensile strength due to hydrogen bonding and metal–ligand bonding interactions, and these two types of dynamic noncovalent interactions are explored in detail. Simultaneously, the developed hydrogels also display superior conductivity and self-healing qualities with restored sensing properties. Furthermore, the proposed hydrogel with good sensitivity and stable strain range is suitable to fabricate a wearable strain sensor, and this hydrogel sensor was demonstrated to be effective in monitoring human motion, including joint flexion, pulse, vocal cord vibration, and respiration. In addition, a pressure distribution sensor array was developed by this hydrogel and was used to construct the model of plantar pressure distribution in normal subjects and flatfoot patients, offering a strategy for the early detection and clinical diagnosis of numerous foot-related disorders. Hence, this research may offer a promising approach for generating biocompatible hydrogels with integrated mechanical characteristics, and these hydrogels present development potentials in multifunctional ionic skins.
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RSC Advances
·
2022
·Vol. 12
·期 21
·12997-13002
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IF 4.036
Yue Hou,Cheng-Jie Jiang,Ying Wang,Jing-Wei Zhu,Jia-Xing Lu,Huan Wang
The construction of an efficient catalyst for electrocatalytic reduction of CO2 to high value-added fuels has received extensive attention. Herein, nitrogen-doped mesoporous carbon (NMC) was used to support CuSb to prepare a series of materials for electrocatalytic reduction of CO2 to CH4. The catalytic activity of the composites was significantly improved compared with that of Cu/NMC. In addition, the Cu content also influenced the activity of electrocatalytic CO2 reduction reaction. Among the materials used, the CuSb/NMC-2 (Cu: 5.9 wt%, Sb: 0.49 wt%) catalyst exhibited the best performance for electrocatalytic CO2 reduction, and the faradaic efficiency of CH4 reached 35%, and the total faradaic efficiency of C1–C2 products reached 67%.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xiaoli Jin,Jian Cao,Huiqing Wang,Chade Lv,Haiquan Xie,Fengyun Su,Xin Li,Ruixue Sun,Shukui Shi,Mengfei Dang,Liqun Ye
Architecting Z-scheme heterojunction can restrain the recombination of photoinduced carriers to improve the photocatalytic performance. However, it still lacks high-efficiency catalysts for sustainable photoreduction of CO 2 . Herein, an Ag-bridged Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructure is successfully developed, which enables room-temperature CO 2 reduction driven by solar energy. In this catalyst, the Ag mediator acts as a bridge to shuttle electrons between Bi 4 O 5 Br 2 and AgBr, separating the electron-hole pairs efficiently and maintaining the original strong reduction reaction. As a result, Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructures show obviously promoted performance of photocatalytic CO 2 reduction in contrast with pristine Bi 4 O 5 Br 2 , delivering a high CO 2 conversion activity of 6.6 and 1.8 μmol g -1 h −1 for CO and CH 4 products, respectively. This study reports an effective reference of Z-scheme Bi 4 O 5 Br 2 /AgBr heterojunction for satisfactory photocatalytic solar energy conversion and synthesis of high value-added products from CO 2 .
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CATALYSIS TODAY
·
2022
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IF 6.562
Li Tan,Yanru Li,Qian Lv,Yuyan Gan,Yuan Fang,Yu Tang,Lizhi Wu,Yuanxing Fang
The conversion of CO 2 to valuable chemicals by photocatalysis has attracted widespread interesting. Owing to the linear structure of CO 2 molecule with strong C O bond, the surface reaction is considered as one of the main issues to restrict the conversion efficiency. Herein, soluble UiO-66 has been developed as co-catalyst to enhance the photocatalytic performance for CO 2 reduction. The soluble UiO-66 has presented the performance ca. 1.5 higher than the insoluble version, yielding 30.6 µmol/h for CO 2 to CO conversion by using 5.0 mg sample. This improvement can be attributed to the preserved framework by soluble UiO-66. Therefore, the chemisorption of CO 2 molecules can be improved, boosting the reduction reaction for CO production. This research provides a new path for a rational design of metal-organic framework (MOF) for photoredox catalysis, meanwhile inspiring advanced application of MOF catalysis with the soluble manner.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 6
·1380-1386
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IF 2.726
Du Yuncheng,Zheng Xuchen,Xue Yurui,Li Yuliang
Electrocatalytic CO 2 reduction is great promising in alleviating the excessive CO 2 emission and the conversion to valuable productions. Herein we report the in-situ controlled growth of Bismuth nanoflower/graphdiyne heterostructures(Bi/GDY) for efficient CO 2 conversion toward formate. Based on GDY, the obtained electrocatalyst exhibits a partial current density of 19.2 mA/cm 2 and high reaction selectivity towards formate with a high Faradic efficiency of 91.7% at −1.03 V vs. RHE, and an energy efficiency of 58.8%. The high formate yield rates could be maintained at around 300 µ.mol/(cm 2 ·h) over a wide potential range. Detailed characterizations show that the unique interface structures between GDY and Bi can enhance the charge transfer ability, increase the number of active sites, and improve the long-term stability, and finally reach high-performance electrocatalytic conversion of CO 2 to formate.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 12
·3826-3835
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IF 6.177
Zhenyu Cai,Fenglei Zhang,Sibing Yu,Zhipeng He,Xinjie Cao,Lei Zhang,Kai Huang
The efficient utilization of CO2 is currently a major concern, and the preparation of a catalyst with high CO2 conversion and product selectivity has become a matter of interest for researchers. Here, we report a series of transition metal-doped CO2 hydrogenation catalysts MFe2O4 (M = Zn, Cu, Ni, Co) with K residue prepared by using PBA as the precursor. The physicochemical properties of the catalysts were characterized by XRD, SEM, TEM, XPS, N2 adsorption and desorption, and H2-TPR, and the catalytic performance was tested. The test results showed that ZnFe2O4 had the highest CO2 conversion of 57.39% and the highest C5+ yield of 39.30% at 320 °C, 3 MPa, H2/CO2 = 3 : 1 and space velocity of 12 000 mL g−1 h−1. ZnFe2O4 showed no significant deactivation after 32 h of continuous operation, indicating its potential as an industrial catalyst.
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MACROMOLECULAR RAPID COMMUNICATIONS
·
2022
·Vol. 43
·期 20
·2200341
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IF 5.006
Yongjia Lou,Jialin Xu,Luyan Xu,Zhuo Chen,Bo-Lin Lin
Synthesizing chemically recyclable solid polymeric materials is a significant strategy to potentially achieve carbon neutral production of new polymers and alleviate plastic pollution, especially when the synthesis is based on CO 2 and inexpensive co-feedstocks available in large scales. Additionally, polymeric materials should have high enough molecular weight to exhibit distinguished properties from low molar mass polymers to serve for a broader range of application scenarios. However, up to now, strategies for developing solid-state CO 2 -based chemically recyclable polyesters with both high molecular weight and facile property tunability are still unprecedented. Herein, a brand-new synthetic route is developed to synthesize chemically recyclable CO 2 -based solid polyesters with high molecular weight ( M n up to 587.7 kg mol −1 ) and narrow dispersity ( Đ < 1.2), which should further broaden the potential application scenarios of new CO 2 -based polyesters. Additionally, complete monomer recovery from poly( δLH 2 ) material is also achieved. The preserved terminal alkene groups allow facile property tuning of the polyesters via photo-initiated thiol-ene click reactions, enabling more potential utilities and further functionalizations.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Ziru Lian,Fang Li,Xiuping He,Junhui Chen,Ren-Cheng Yu
Ocean acidification caused by increasing emission of carbon dioxide (CO 2 ) is expected to have profound impacts on marine ecological processes, including the formation and evolution of harmful algal blooms (HABs). We designed a set of experiments in the laboratory to examine the effects of increasing CO 2 on the growth and toxicity of a toxic dinoflagellate Alexandrium minutum producing paralytic shellfish toxins (PSTs). It was found that high levels of CO 2 (800 and 1200 ppm) significantly promoted the growth of A. minutum compared to the group (400 ppm) representing the current CO 2 level. The total yields of PSTs by A. minutum , including both intracellular and extracellular toxins, were significantly enhanced, probably due to the induction of core enzyme activity and key amino acids synthesis for PST production. More interestingly, high level of CO 2 promoted the transformation from gonyautoxin2&3 to gonyautoxin1&4 and depressed the release of PSTs from inside to outside of the cells. All these processes collectively led to an apparent increase of A. minutum toxicity. Our study demonstrated that rising CO 2 would increase the risk of toxic A. minutum based on the comprehensive analyses of different processes including algal growth and toxin synthesis, transformation and release.
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ACS Nano
·
2022
·
IF 18.027
Nuoya Li,Xujian Chen,Jin Wang,Xinmeng Liang,Lintao Ma,Xiaolang Jing,De-Li Chen,Zhengquan Li
Utilizing sunlight to convert CO2 into chemical fuels could simultaneously address the greenhouse effect and fossil fuel crisis. ZnSe nanocrystals are promising candidates for photocatalysis because of their low toxicity and excellent photoelectric properties. However, pristine ZnSe generally has low catalytic activities due to serious charge recombination and the lack of efficient catalytic sites for CO2 reduction. Herein, a ZnSe nanorods–CsSnCl3 perovskite (ZnSe–CsSnCl3) type II heterojunction composite is designed and prepared for photocatalytic CO2 reduction. The ZnSe–CsSnCl3 type II heterojunction composite exhibits enhanced photocatalytic activity for CO2 reduction with respect to pristine ZnSe nanorods. The experimental characterizations and theoretical calculations reveal that the efficient charge separation and lowered free energy of CO2 reduction facilitate the CO2 conversion on the ZnSe–CsSnCl3 heterojunction composite. This work presents a type II heterojunction composite photocatalyst based on ecofriendly metal chalcogenides and metal halide perovskites. Our study has also promoted the understanding of the CO2 reduction mechanisms on perovskite nanocrystals, which could be valuable for the development of metal halide perovskite photocatalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Fangxu Dai,Mingming Zhang,Qian Chen,Mingzhong Mi,Zhenjiang Li,Jishu Han,Jun Xing,Shouhua Feng,Lei Wang
Developing highly efficient and low-cost photocatalysts for CO 2 reduction is of critical importance for the conversion of CO 2 to value-added chemicals. Here we report a Co-based zeolitic imidazole framework (ZIF-67) based photocatalyst with exceptional photocatalytic activity and durability for CO 2 reduction. ZIF-67 is doped with dicyandiamide (DCD), the intermediate link with the trace Ru cocatalyst (0.0127 wt. %). The underlying reduction mechanism was unraveled by the joint experiment-theory study. The strong orbital coupling of ZIF-67-DCD-Ru series structure leads to strong CO 2 adsorption, electron enrichment on cocatalyst, and minimum Gibbs free energy barrier of CO generation. The synthesized ZIF-67/DCD/Ru sample exhibits excellent CO 2 photoreduction performance with a CO generation rate of 1495 mmol g Ru −1 h −1 and achieves a record turnover frequency (TOF) of 151 h −1 , representing top-level photocatalytic activity among all reported ZIFs-based photocatalysts. For the first time, our work points out a novel way to achieve high activity of ultralow noble metal loading photocatalyst and provides an in-depth understanding of the advances of the series structure.
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Small
·
2023
·Vol. 19
·期 37
·2300841
·
IF 13.3
Yuhan Wang,Jin Wang,Meng Zhang,Song Zheng,Jiahui Wu,Tianren Zheng,Guocan Jiang,Zhengquan Li
Perovskite nanocrystals (PNCs) are promising candidates for solar-to-fuel conversions yet exhibit low photocatalytic activities mainly due to serious recombination of photogenerated charge carriers. Constructing heterojunction is regarded as an effective method to promote the separation of charge carriers in PNCs. However, the low interfacial quality and non-directional charge transfer in heterojunction lead to low charge transfer efficiency. Herein, a CsPbBr 3 –CdZnS heterojunction is designed and prepared via an in situ hot-injection method for photocatalytic CO 2 reduction. It is found that the high-quality interface in heterojunction and anisotropic charge transfer of CdZnS nanorods (NRs) enable efficient spatial separation of charge carriers in CsPbBr 3 –CdZnS heterojunction. The CsPbBr 3 –CdZnS heterojunction achieves a higher CO yield (55.8 µmol g −1 h −1 ) than that of the pristine CsPbBr 3 NCs (13.9 µmol g −1 h −1 ). Furthermore, spectroscopic experiments and density functional theory (DFT) simulations further confirm that the suppressed recombination of charge carriers and lowered energy barrier for CO 2 reduction contribute to the improved photocatalytic activity of the CsPbBr 3 –CdZnS heterojunction. This work demonstrates a valid method to construct high-quality heterojunction with directional charge transfer for photocatalytic CO 2 reduction. This study is expected to pave a new avenue to design perovskite–chalcogenide heterojunction.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Ding-Ming Xue,Wen-Juan Zhang,Xiao-Qin Liu,Shi-Chao Qi,Lin-Bing Sun
Many solid adsorbents have been prepared for the CO 2 capture. In particular, the photoresponsive adsorbents have attracted extensive interests because of their tunable pore structure and variable responsive behaviors provoked by the external light. However, it is challenging to fabricate the photoresponsive adsorbents featured the big CO 2 capacity and high CO 2 selectivity. Herein, copolymerized between 4-phenylazobenzoyl chloride, 2,4,6-trichloro-1,3,5-triazine and melamine , a series of azobenzene-functionalized porous polymers (PTM-AZOs) are successfully synthesized. The PTM-AZOs are verified in possession of proper pore structures, large surface area and photoconductive properties through a series of characterization. The PTM-AZO-2 with the trans -isomerization exhibits the best CO 2 adsorption amount of 2.7 mmol·g −1 (273 K and 0.1 MPa), while the CO 2 /N 2 selectivity can reach 2459 and 607 on the trans - and cis -isomerization, respectively. The regulatable pore structures controlled by the photoresponsive azobenzene groups affect the CO 2 capture performance of the PTM-AZOs.
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