Coatings
·
2023
·Vol. 13
·期 1
·145
·
IF 3.4
Jin Xiang,Shuchang Wang,Yuanxin Cao,Lining Fang,Wei Ke,Hui Guo,Baoyu Duan,Wenhe Yu,Liang Li,Zilong Zhao
As an environmental semiconductor material, TiO2has important applications in the fields of environmental protection and water treatment. The preparation of P25 particles into nano-functional material films with a high specific surface area has always been a bottleneck limiting its large-scale application. In this paper, a one-step method of preparing TiO2nanocomposites by doping carbon nanotube (CNT) and carbon quantum dots (CQD) with tetrabutyltitanate and P25 TiO2under ultrasonic radiation is proposed to synthesize a novel antifouling material, which both eliminates the bacterium of Escherichia coli and shows good photoelectric properties, indicating a great value for the industrial promotion of TiO2/CNT. This mesoporous composite exhibits a high specific surface area of 78.07 M2/g (BET) and a tested pore width range within 10–120 nm. The surface morphology of this composite is characterized by TEM and the microstructure is characterized through XRD. This preparation method can fabricate P25 particles into a nano-functional material film with a high specific surface area at a very low cost.Keywords:TiO2;carbon quantum dots;one-step synthesis;ultrasonic radiation;carbon nanotube;mesoporous nanocomposites
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高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-15
·
IF 16.6
Gao Wenhui,He Jiuyang,Chen Lei,Meng Xiangqin,Ma Yana,Cheng Liangliang,Tu Kangsheng,Gao Xingfa,Liu Cui,Zhang Mingzhen,Fan Kelong,Pang Dai-Wen,Yan Xiyun
Nanozymes with superoxide dismutase (SOD)-like activity have attracted increasing interest due to their ability to scavenge superoxide anion, the origin of most reactive oxygen species in vivo. However, SOD nanozymes reported thus far have yet to approach the activity of natural enzymes. Here, we report a carbon dot (C-dot) SOD nanozyme with a catalytic activity of over 10,000 U/mg, comparable to that of natural enzymes. Through selected chemical modifications and theoretical calculations, we show that the SOD-like activity of C-dots relies on the hydroxyl and carboxyl groups for binding superoxide anions and the carbonyl groups conjugated with the π-system for electron transfer. Moreover, C-dot SOD nanozymes exhibit intrinsic targeting ability to oxidation-damaged cells and effectively protect neuron cells in the ischemic stroke male mice model. Together, our study sheds light on the structure-activity relationship of C-dot SOD nanozymes, and demonstrates their potential for treating of oxidation stress related diseases.
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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
IONICS
·
2023
·Vol. 29
·期 4
·1627-1637
·
IF 2.8
Yu Rui,Wang Qing,Li Zhaokuan,Su Hao,Lan Yongzhi
By designing the composition of transition elements and combining the adjustable structure of MOFs, it is reported that the synthesis of bimetallic ZnCo-MOFs based on different Zn/Co molar ratios, then the NiZn 1 Co 2 -LDH nanospheres are synthesized by Ni 2+ hydrolysis. Compared with the bimetallic NiZn-LDH and NiCo-LDH, the trimetallic layered hydroxide NiZn 1 Co 2 -LDH after adding Zn 2+ reached a high specific capacity of 217.3 mAh g −1 at 1 A g −1 . Additionally, both have excellent cycle stability (84.6% capacity retention after 5000 charge–discharge cycles at 10 A g −1 ) and strong rate performance (72.47% capacity retention rate at 10 A g −1 ) as well. Furthermore, a hybrid supercapacitor (HSC) with NiZn 1 Co 2 -LDH as positive electrodes and activated carbon as negative electrodes was fabricated. The HSC device delivered a high energy density of 45 Wh kg −1 at a power density of 774.1 W kg −1 and excellent cycling stability (specific capacity retention of 92% after 10,000 cycles).
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高影响因子
Nature Energy
·
2023
·Vol. 8
·期 3
·294-303
·
IF 56.7
Luo Long,Zeng Haipeng,Wang Zaiwei,Li Min,You Shuai,Chen Bin,Maxwell Aidan,An Qinyou,Cui Lianmeng,Luo Deying,Hu Juntao,Li Shangzhi,Cai Xueqing,Li Weixi,Li Lin,Guo Rui,Huang Rong,Liang Wenxi,Lu Zheng-Hong,Mai Liqiang,Rong Yaoguang,Sargent Edward H.,Li Xiong
Two-dimensional (2D) and quasi-2D modifications of three-dimensional (3D) perovskite active layers have contributed to advances in the performance of perovskite solar cells (PSCs). However, the ionic diffusion between the surface 2D and bulk 3D perovskites leads to the degradation of the 3D/2D perovskite heterostructures and limits the long-term stability of PSCs. Here we incorporate a cross-linked polymer (CLP) on the top of a 3D perovskite layer and then deposit a 2D perovskite layer via a vapour-assisted two-step process to form a 3D/CLP/2D perovskite heterostructure. Photoluminescence spectra and thickness-profiled elemental analysis indicate that the CLP stabilizes the heterostructure by inhibiting the diffusion of cations (formamidinium, FA + and 4-fluorophenylethylammonium, 4F-PEA + ) between the 2D and 3D perovskites. For devices based on carbon electrodes, we report small-area devices with an efficiency of 21.2% and mini-modules with an efficiency of 19.6%. Devices retain 90% of initial performance after 4,390 hours operation under maximum power point tracking and one-sun illumination at elevated temperatures.
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高影响因子
Journal of Rubber Research
·
2023
·Vol. 26
·期 1
·47-54
·
IF 1.3
Jiang Jian-Liang,Yang Xiao,Zhao Dongqi,Feng Ya-kai
Blending is an economical and feasible method to improve the properties of polymers. To improve the mechanical properties of ethylene acrylate rubber (AEM), a series of hydrogenated nitrile butadiene rubber (HNBR)/AEM blends were prepared. The mechanical, thermal properties and compatibility of HNBR/AEM blends were investigated in detail. Carbon black filled HNBR/AEM blends exhibited excellent mechanical properties as well as good resistance to high and low temperature. The reactivity of HNBR was higher than that of AEM at a high temperature (180 °C) in air. The crosslinking reaction was more likely to occur in HNBR rubber, while it is not easy to remove small molecules at high temperature. The degradation temperature ( T d5% ) of AEM (350 °C) was lower than that of HNBR (390 °C), while the hot-air ageing tests indicate that the retention of tensile strength of AEM (95%) was much higher than that of HNBR (58%). HNBR/AEM blends were compatible within the full range of formulations, and have been mutually validated by SEM, dynamic mechanical analysis and mechanical property models of HNBR/AEM blends.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Haiwen Gao,Yang Wang,Honglong Shen,Zongdeng Wu,Juanjuan Song,Jia Yu,Cai Liu,Haiyan Jing,Peng Zhao,Wu Lei,Qingli Hao
From the perspective of nano science and nanotechnology, it is very interesting and important to develop a reasonable and practical synthesis route of nanomaterials for production and life. Here, we develop a strategy of hollow cubic metal oxide nanocages. The method was inspired by Pearson’s Hard-Soft-Acid-Base (HSAB) theory, and nanocages with excellent performance were prepared by coordination etching and optimization of reaction conditions. Firstly, Cu 2 O nanocubes were prepared by redox reaction at room temperature. Then, the hollow cubic NiCo 2 O x /CeO y nanocages were obtained by HSAB theory and cerium doping. The nanomaterial has a specific capacitance of up to 1976 F/g at the current density of 1 A/g. In addition, the asymmetric supercapacitor (ASC) prepared with hollow cubic NiCo 2 O x /CeO y nanocage as cathode and active carbon as anode exhibits an energy density as high as 37.1 Wh kg −1 at the power density of 375 W kg −1 . The capacitance retention rate of the device is 91.5 % after 10,000 cycles. The device can be charged to light up LED lights. These excellent electrochemical properties, due to their unique structure and synergistic effect between materials, indicate the potential application value of hollow cubic NiCo 2 O x /CeO y nanocages in high-performance supercapacitors.
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高影响因子
FUEL
·
2022
·
IF 8.035
Yimao Shen,Zhi Li,Jingtao Hu,Yue Zhang,Tianduo Li,Guangjin Chen
Gas hydrate technology is a new gas storage method developed in recent years and has great application potential. Due to the slow formation kinetics of hydrate and the low actual gas storage density, it is a promising method to prepare the fixed bed filled with wet porous materials to inducing adsorption-hydration coupling effect, so as to improve the gas storage efficiency. In this study, various additives including THF, TBAB and diesel oil were added to the water-bearing activated carbon fixed bed to improve its gas storage capacity. Our experimental results show that the addition of THF or TBAB can significantly promote the gas storage performance of the bed. At the optimum concentration of THF (7.5 wt%), the gas storage density of bed (S b ) and gas storage capacity of hydrate (S w ) were 128.66 V/V b and 194.26 V/V w , which are 2.89 times and 3.07 times higher than those of wet activated carbon fixed bed without additives, respectively. When 5 wt% TBAB was added, the S b and S w were increased by 1.86 times and 1.87 times, respectively. Moreover, using diesel to establish gas channels in the fixed bed to improve the gas mass transfer between the bulk gas phase and the fixed bed can also significantly improve the gas storage performance of the bed. When the oil-carbon ratio (R o ) is 0.5, the S b and S w are 97.97 V/V b and 172.77 V/V w , respectively. However, further increasing the amount of diesel oil will not significantly improve the gas storage density of the bed due to the volume increase of the bed caused by the addition of diesel. When both diesel oil and THF are added to the water-containing fixed bed, the effect will be not significantly better than that of the bed with diesel oil or THF alone because the two accelerators compete with each other. Finally, the gas release and decomposition speed of the water-bearing fixed bed with / without 7.5 wt%THF are investigated. The results show that the final gas recovery of the bed with 7.5 wt% THF could reach 95.01 %, indicating a good application prospect.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Miaomiao Ye,Ningyao Tao,Xiaojiao Zhou,Xingyuan Wang,Wen Jin,Tuqiao Zhang,Xiaowei Liu
Salt accumulation and volatile organic compounds (VOCs) entering condensed freshwater are two main drawbacks in the new approach of solar-driven seawater desalination. In this work, a super-hydrophilic honeycomb activated carbon (SHHAC) evaporator was fabricated for simultaneous salt rejection and VOCs removal. The optimal water evaporation rate of the SHHAC evaporator was as high as 1.50 kg·m −2 ·h −1 under one sun illumination with the corresponding photothermal conversion efficiency of 99.4 %. Due to the super-hydrophilic properties, high water absorption capacity, fast water absorption rate and unique honeycomb structure of SHHAC, the salt-rejection property of the SHHAC evaporator was achieved by flowing back the concentrated brine to the underneath seawater. Simultaneously, the distillation concentration ratio (R D ) of phenol was reduced from 75 % to 0 % by the SHHAC evaporator resulting in zero phenol entering condensed freshwater. Finally, the potential application of the SHHAC evaporator was demonstrated by an expanded outdoor experiment using the real seawater as the feedwater.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Jiying Shi,Linlin Zang,Long Zhang,Jingzhen Wang,Qing Xu,Yanhong Zhang,Liguo Sun
Porous carbon supported metal nanoparticles as supercapacitor electrode materials have attracted extensive attention. In this paper, cobalt nitrate/polystyrene microspheres/chitosan(Co(NO 3 ) 2 /PS/CS) balls were fabricated by emulsion encapsulation and self-assembly process. After carbonization, Co nanoparticles (NPs) loaded on porous ball-in-ball N-doped carbon (Co/BNC) were prepared. Co/BNCs with high surface area profit formation of sufficient active sites and facilitate ion transport due to the interconnected and interpenetrating porous carbon structure. The electrochemical performances of Co/BNCs are affected by Co NPs content and the Co/BNC with the optimal Co NPs content (Co/BNC-2) possesses a commendable specific capacitance of 1120 F g −1 at 1 A g −1 . Moreover, the capacitance retention of the asymmetric supercapacitors assembled by Co/BNC-2 and activated carbon is about 85.38 % after 5000 cycles. Remarkably, the device exhibits a maximum energy density of 60.9 Wh kg −1 at 764 W kg −1 and maintains 37.8 Wh kg −1 at 7878 W kg −1 . Co/BNCs mentioned here have the potential to be candidates for high-performance supercapacitor electrode materials.
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高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 8
·2201425
·
IF 3.6
Lingling Liu,Hongdie Yin,Wei Guo,Bi Jia,Hanmei Jiang
Ti 3 C 2 T x MXene is one of the most promising electrode materials for supercapacitors, but it often suffers in poor experiment gravimetric capacitance, which limits practical applications in industry needs. Herein, etched Ti 3 C 2 T x MXene with high gravimetric capacitance is prepared by chemical etching of MXene with concentrated alkaline solution. The intercalation of K + and the scissor role of OH − can simultaneously enlarge the interlayer spacing and cut the size of sheets, which lead to the high active-site concentration and cation diffusion. As a result, the etched Ti 3 C 2 T x MXene displays high gravimetric capacitance of 368.1 F g −1 at 2 A g −1 and outstanding cycling stability without capacitance loss over 5000 cycles at 6 A g −1 ,and the surface capacitance contribution in etched Ti 3 C 2 T x MXene occurs to a greater extent compared with the pristine MXene. Moreover, the effect of chemical etching on the supercapacitor performance and energy-storage mechanism indicates that the active-size concentration and cation diffusion could be maximized when the chemical etching conditions are appropriate, leading to the highest performance of etched Ti 3 C 2 T x MXene. Herein, it is demonstrated that the chemical etching approach is applicable to design MXenes with high gravimetric capacitance to maximize their potential applications in energy-storage applications and other fields.
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高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Bin Wang,Pei-ya Li,Qian Dong,Li-qin Chen,Hai-qiang Wang,Pei-long Han,Tao Fang
Liquid organic hydrogen carrier technology (LOHC) is considered to be the most promising solution for hydrogen storage and transport, but its development is limited by the high cost of noble metal catalysts. In this paper, four kinds of Ni/Co bimetallic catalysts with different proportions were prepared by the impregnation method. The effects of the Ni/Co molar ratio and the reduction temperature on the hydrogenation performance of N-ethylcarbazole (NEC) were studied. The relationship between the structure and the properties of the catalyst was discussed by combining various characterization methods. The results show that when cobalt is added to 50%, the hydrogenation activity is the most significant. Meanwhile, 100% of NEC conversion and 98.99% of 12H-NEC selectivity were achieved. The hydrogenation capacity is 5.77 wt %, when the catalyst reduction temperature is 450 °C. The characterizations show that the two metals are uniformly doped and highly dispersed with a good pore structure, and the metal particles have good alloy morphology. The synergistic interaction between Ni/Co metals is the key factor for the remarkable catalytic activity of the catalyst. The design and application of highly efficient nonprecious metal hydrogenation catalysts provide more feasibility to promote the commercial development of liquid organic hydrogen carrier technology.
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高影响因子
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