CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yingjie Tao,Yatao Wu,Hao Chen,Weijie Chen,Jiajie Wang,Yifei Tong,Gu Pei,Zhehong Shen,Cao Guan
Metal oxides-based materials are promising electrodes for energy storage devices, however, the low rate performance and the high energy consumption in the preparation limit their practical applications. Herein, a novel amorphous hydroxyl-rich Co 3 O 4 hierarchical structure flexible electrode is facilely fabricated via electrochemical oxidation of a cobalt-based metal-organic framework. The as-prepared Co 3 O 4 hierarchical structure is composed of large microrods and small nanoparticles and possesses abundant mesopores, amorphous, and hydroxyl-rich nature. These characteristics favor rapid electron transfer, complete exposure of the active interface, and sufficient penetration of electrolyte ions within the active material. Benefitting from these advantages, the optimal Co 3 O 4 electrode (Co 3 O 4 -5) expresses a high reversible specific capacitance ( C s ) of 226.1 C·g −1 (or 253.2 mC·cm −2 ), which is 2 (or 3.7) times higher than those of highly crystalline hydroxyl-deficient Co 3 O 4 electrode. The Co 3 O 4 -5 electrode also shows excellent rate performance (97% C s retention after a 6.7-times current increasing), which surpasses the levels of many cobalt oxide-based electrodes. In addition, an asymmetric supercapacitor (ASC) constructed from this Co 3 O 4 -5 electrode achieves a large energy density of 26.6 Wh·kg −1 (or 0.146 mWh·cm −2 ), outstanding rate capability (1% C s loss at the 10-fold higher current density), and stable cycle performance (10.1% C s loss after 20,000 charge-discharge cycles).
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jie Zhu,Sifan Wang,Jiaji Zhang,Zhecheng Fang,Weitao Ji,Gaobo Lin,Lei Guo,Bolong Li,Jianghao Wang,Jie Fu
Constructing a stable Cu 0 /Cu 2+ interface is critical for enhancing the C-C coupling during the process of CO 2 electroreduction. However, the high-valence Cu species are unstable under the operating conditions. Herein, polyhedral-shaped CuO is coated with hydroxy-rich SiO 2 nanoparticles (m-SiO 2 /CuO) to stabilize the Cu 2+ species, enabling efficient CO 2 reduction to the ethylene product. Significantly, the optimal m-SiO 2 /CuO catalyst exhibits an impressive Faradaic efficiency of 55.5 % and an industrial-level partial current density of 500 mA cm −2 toward ethylene. Fourier transform infrared spectra and X-ray photoelectron spectra reveal that the strong interfacial interaction between CuO and hydroxy-rich SiO 2 is conducive to stabilizing the Cu 2+ species. In-situ characterizations reveal that the Cu 0 /Cu 2+ interface facilitates CO 2 activation and the key intermediate *OCCHO, thus promoting the production of ethylene. This work paves the way for developing advanced electro-catalysts of producing ethylene.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
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2022
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IF 11.307
Yuhong Tao,Yuewen Dai,Zhenyu Zhang,Maofu Geng,Fei Liu,Haining Na,Jin Zhu
The formation of hydroxyl-rich carbon layer coated silica microspheres (SiO 2 –NH 2 @C) under hydrothermal carbonization (HTC) conditions is demonstrated for the catalytic hydrolysis of regenerated cellulose to sugar. The driving factors for the formation of the SiO 2 –NH 2 @C and the different morphologies are investigated through the surface amino modification of silica and the control of the carbon source concentration during the HTC cladding process . The surface silica atom content after hydrothermal treatment of unmodified and modified silica is 14.24% versus 1.17% respectively. This shows the introduction of amino groups can drive the formation of the carbon layer coated structure through electrostatic interactions . As can be seen from the SEM and TEM images, 2 nd HTC and adjustment of the concentration of the carbon source can control the morphology of the SiO 2 –NH 2 @C. With the strong adsorption between the hydroxyl-rich hydrothermal carbon outer layer and the cellulose, it is possible to hydrolyze 96.4% of the regenerated cellulose to glucose under pure aqueous phase ultra-dilute acid conditions, with a glucose yield of 75.8%. A clearer understanding of the driving factors and control conditions for the formation of the hydroxyl-rich SiO 2 –NH 2 @C structure is provided, along with a more definite direction for the preparation of similar nanomaterials .
研究领域:
材料科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Zihao Xu,Meng Rong,Qiyu Meng,Haoyu Yao,Shan Ni,Li Wang,Huifang Xing,Hongnan Qu,Liangrong Yang,Huizhou Liu
In this work, two hypercrosslinked hydroxyl-rich polymers (HCP-P and HCP-R) were facilely prepared through a one-pot Friedel-Crafts polymerization of phenol, resorcinol and formaldehyde dimethyl acetal, respectively. HCP-P and HCP-R were investigated for their ability to separate Cs + from the salt lake brine via ion-exchange reaction between Cs + and O − Na + . The Cs + adsorption isotherms of HCP-P and HCP-R follow the Langmuir model, and their adsorption capacities reach 249.64 mg g −1 and 259.97 mg g −1 , surpassing most of commercial materials like AMP-PAN (81 mg g −1 ) and TAM-5 (191.8 mg g −1 ). The Cs + /K + separation factors (S.F.) of HCPs can reach 12.4 even in the presence of high concentrations of K + (C (K + ) /C (Cs + ) = 712.5). Notably, HCPs could retain more than 90% of the adsorption capacities after 5 successive adsorption-desorption cycles. Besides, X-ray photoelectron spectroscopy (XPS), FT-IR spectra and TEM-EDS analysis revealed the ion exchange mechanism of the Cs + adsorption process. This work demonstrated the excellent application potential of hypercrosslinked hydroxyl-rich polymer adsorbents in separating Cs + from the salt lake brine.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Runren Jiang,Guanghua Lu,Zhenhua Yan,Jianchao Liu,Donghai Wu,Yonghua Wang
Microplastics , as a class of widely dispersed persistent pollutants, the main reactive oxygen species is far from clarified in their photocatalytic degradation . In this study, a novel hydroxy-rich ultrathin BiOCl (BiOCl-X) was prepared at room temperature. BiOCl-X shows a strong potential for photocatalytic degradation of microplastics, and the mass loss of plastics is 24 times higher than that of the BiOCl nanosheets . More importantly, we explored the photocatalytic mechanism through electron paramagnetic resonance and capture experiments, and found that the surface hydroxyl of BiOCl can effectively enhance the production of hydroxyl radicals , resulting in boosting degradation performance. Here, we provide new insights that photocatalytic degradation of microplastic is dependent on surface hydroxyl groups. This work could be useful for controllable designs of hydroxy-rich photocatalysts for applications in microplastic degradation.
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Gen Li,Biao Zhang,Zhongcheng Ma,Zhonggang Wang
This manuscript presents the first report on employing porous polymers as adsorbents for indium recovery. Specifically, hydroxyl- and amine-riched poly (melamine-formic acid) network (PAN-FA) is successfully synthesized from melamine and formic acid via a facile “one-step” catalyst-free polymerization process, which exhibits hierarchical pores ranging from 0.52 nm to 5.95 nm and large BET specific surface area of 705 m 2 g −1 . The resultant PAN-FA contains large amount of secondary amine and hydroxyl groups capable of chelating with In 3+ ions. Moreover, the highly hydrophilic polymer skeleton and the existence of suitably large mesopores are favorable for the transport of In 3+ ions through the pore channels in water medium. As a result, PAN-FA shows the adsorption capacity of In 3+ ions (206.3 mg g −1 ) in water, surpassing previously reported indium-adsorbents. More importantly, after five cycling experiments, the porous structure of PAN-FA remains stable and the adsorption capacity is nearly unchanged. The combination of cheap raw materials, simple synthesis process, high adsorption capacity for In 3+ ions and pronounced recycling reusability endows PAN-FA with a promising candidate adsorbent for practical indium-recovery application.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Hong Liu,Chengqi Feng,Zewei Gong,Yuxin Zhu,Juncheng Huang,Yafei Li,Haining Na,Jin Zhu
Raspberry-like carbon layer coated silica nanoparticles (MSN-x-NH 2 @C) with controllable hydroxyl-rich rough surface is designed and synthesized by use of alkaline etching strategy and hydrothermal carbonization (HTC) method, which is utilized as catalyst to provide particular interaction with cellulose between the solid-solid interfaces. Through the control of surface roughness of the raspberry-like catalyst, it induces the formation of local area with strong absorption on the surface and thus enhance the capability to disrupt the aggregated structure of cellulose. Accordingly, in low acidic aqueous system with MSN-x-NH 2 @C, the cellulose conversion rate is up to 91.99% with the total reducing sugar yield at 81.46% and glucose yield of ∼70% after the second hydrolysis in aqueous system. Furthermore, the obtained MSN-x-NH 2 @C exhibits good thermal stability and reusability. This research provides a new perspective for the design and preparation of nano-sized solid catalyst with controlled surface topological structure to enable the surface adsorption capability towards cellulose more efficiently in aqueous system.
研究领域:
材料科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2023
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IF 10.9
Yuewen Dai,Maofu Geng,Yuhong Tao,Zhenyu Zhang,Chengqi Feng,Juncheng Huang,Fei Liu,Haining Na,Jin Zhu
By catalytically converting cellulose using a phosphate-modified hydroxyl-rich carbon-based catalyst (P@HRCBC), which was made by hydrothermal carbonization , glucose was successfully hydrolyzed from cellulose in an aqueous phase system (HTC). The glycosidic bond breaking catalyzed by the -PO 3 H 2 and the cellulose matrix lamellar exfoliation are both enhanced by the excellent adsorption capacity of the exceptionally rich –OH. The activity of cellulase is perfectly imitated. Within 120 min, the glucose output and the conversion of cellulose achieved 96.3% and 47.1%, respectively. The numerous ways that P@HRCBC adsorbs cellulose and cellobiose alter its catalytic ability and make separating glucose easier. After numerous cycles, the conversion of cellulose was maintained at 90.3%, thanks to the remarkable stability of –OH and -PO 3 H 2 . P@HRCBC shows an actual "enzymatic" catalytic function that provides a new solution for the efficient green hydrolysis of cellulose into glucose.
研究领域:
化学工程
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催化
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生物化学
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Ke Wang,Ting-Ting Su,Chang-You Shao,Wen-Feng Ren,Run-Cang Sun
Dendrite growth, hydrogen evolution, and corrosion reactions of zinc (Zn) metal anodes deteriorate the cyclic performance and hinder the commercial application of high-safety aqueous Zn-ion batteries. Herein, a hydroxyl-rich starch (SS) layer is rationally constructed on Zn anodes (Zn@SS) through a facile coating process to tune the Zn electroplating homogeneity and reduce adverse reactions with the electrolyte. SS layers with strong chelating ability can in situ coordinate with Zn2+ ions within the aqueous electrolyte and form ionic conductive gels, which can decrease the contact area, facilitate ion transportation from the ZnSO4 electrolyte to the metallic Zn anodes, and regulate the plating behavior for Zn2+ ions. Zn@SS symmetrical cells show a prolonged circulation of 3000 h at 2 mA cm–2. Even at a large charge/discharge depth of 5 mAh cm–2, Zn@SS symmetric cells can provide a long lifetime of 1000 h. Zn@SS-V2O5 full cells can operate for 1000 cycles at 1 A g–1. This article offers a novel approach for the surface protection of Zn metal anodes through the construction of dynamic ionic conductive gel layers and widens the applied field of renewable and biodegradable starch-based biomass materials.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Lidan Deng,Zheng Wang,Xingmao Jiang,Jie Xu,Zijian Zhou,Xiaozhong Li,Zhixiong You,Mingyue Ding,Tetsuya Shishido,Xiaowei Liu,Minghou Xu
Various value-added chemicals such as formic acid , carbon monoxide , methane, methanol, have been obtained using CO 2 as a feedstock. However, formaldehyde generation from CO 2 is less reported. Here, we performed CO 2 hydrogenation with H 2 in additive-free water and used layered double hydroxide supported Ru as the heterogeneous catalyst. It was found that gaseous CO 2 and H 2 could be efficiently and selectively converted to formaldehyde dissolved in water even at room temperature with ambient pressure. The highest gaseous CO 2 conversion of 89.7% and a formaldehyde yield of 58.7% were achieved using a Ru/LDH-red catalyst in water at 30 °C with 10 bar CO 2 and 10 bar H 2 . Combined with experimental and theoretical studies, HCOOH was found as the important reaction intermediate. The rich surface –OH of LDH and hybrid electronic state of Ru over Ru/LDH-red catalyst resulted in highly efficient HCHO formation. Our findings offer opportunities to one energy-efficient formaldehyde synthesis method.
研究领域:
催化
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化学工程
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材料科学
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环境化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）