JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Chunliu Zhu,Rui Long,Liyang Zhu,Wenyu Zou,Yafei Zhang,Zongying Gao,Jing Shi,Weiqian Tian,Jingyi Wu,Huanlei Wang
Zinc ion hybrid capacitors (ZIHCs) are encouraging energy storage devices for large-scale applications. Nevertheless, the electrochemical performance of ZIHCs is often limited by the cathode materials which show low energy density and rate capability practically. One of the efficient strategies to overcome these challenges is the development of advanced carbon cathode materials with abundant physi/chemisorption sites. Herein, we develop a sulfate template strategy to prepare sulfur and oxygen doped carbon nanosheets (SOCNs) as a potential cathode active material for ZIHCs. The as-prepared SOCNs exhibit porous architectures with a large surface area of 1877 m 2 g −1 , substantial structural defects, and high heteroatom-doped contents (O: 7.9 at%, S: 0.7 at%). These exceptional features are vital to enhancing Zn ion storage. Consequently, the SOCN cathode shows a high capacity of 151 mAh g −1 at 0.1 A g −1 , high cycle stability with 83% capacity retention at 5 A g −1 after 4000 cycles, and a superior energy density of 103.1 Wh kg −1 . We also investigate the dynamic adsorption/desorption behaviors of Zn ions and anions of the ZIHCs carbon electrodes during the process of charge and discharge by ex-situ experiments. This work highlights the significance of the integration with a large specific surface area and bountiful heteroatoms in carbon electrodes for achieving high-performance ZIHCs.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xiao Zhang,Jiankang Wang,Yahui Wang,Zhongping Yao,Wanqian Guo,Hongbo Xu,Zhaohua Jiang
The enhancement of electron transport process on multiple channels of C−Fe and C−S−Fe bonds between dual-reaction centres was investigated for stimulating the antibiotics degradation in Fenton-like processes. Herein, multiple channels structure of sulfur-doped carbon coupled Fe 7 S 8 cluster through C−Fe bond and C−S−Fe bond was constructed through density functional theory (DFT), and S-doped carbon framework coated Fe 7 S 8 nanoparticles (Fe 7 S 8 /SC) Fenton-like catalyst was prepared through hydrothermal and subsequent sulfuration process. The DFT calculations revealed that electrons are thermodynamically transferred from carbon to iron along both C−Fe and C−S−Fe bonds. The optimized Fe 7 S 8 /SC catalyst exhibited desirable catalytic property for Fenton-like degradation for various antibiotics, the removal of amoxicillin, norfloxacin, and tetracycline hydrochloride reach 98.9%, 97.8%, and 99.3% respectively within 40 min under neutral pH, and catalyst also demonstrated excellent cycle stability after five runs. The excellent degradation effect of antibiotics by Fenton-like catalyst was attributed to the intensified electron transport process by multiple electron transfer channels between dual reaction centres, making Fe II easier to regenerate. This study spreads a new route for the enhancement of electron transport process in Fenton-like catalysts by constructing multiple channels.
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Journal of Energy Storage
·
2022
·
IF 8.907
Shiju Cai,Chenyi Wang,Jiafeng Qian,Zhengwang Tao,Jian Li
A series of aromatic proton exchange membranes (PAES-4S-xx) with tetrasulfonated side alkyl chains in repeated structural units are conveniently prepared by two-step reaction using 3,3′-(3″-aminophenyl)-4,4′-difluorodiphenylsulfone (2NH 2 -DFDPS), 4,4′-difluoro-diphenylsulfone, 4,4′-dihydroxybiphenyl and sodium 2-bromoethyl sulfonate as starting materials. Their chemical structure and physical properties are systematically studied. The incorporation of locally dense flexible side alkyl chains effectively endows the obtained ionic membranes based on PAES-4S-xx with high proton conductivity and moderate water uptake and swelling ratio. The corresponding values are between 38 and 98 mS/cm, 10 %–26 % and 6 %–18 % (30 °C), respectively, which increases with the increase of sulfonic acid content. In VRFB tests, the coulomb efficiency (CE) and energy efficiency (EE) of a single battery based on PAES-4S-24 membrane reach 95.8 % and 86.6 % at current density of 40 mA/cm 2 , respectively, higher than that of the single battery assembled by Nafion 115 (CE:90.7 %, EE:81.5 %). In addition, the single battery based on PAES-4S-24 also shows good stable performance during cyclic charging and discharging.
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Inorganic Chemistry Frontiers
·
2022
·Vol. 10
·期 2
·406-416
·
IF 7.779
Zhenyuan Ji,Guanxiang Tang,Dongwei Ma,Lizhi Chen,Guoxing Zhu,Jun Zhu,Xiaoping Shen
Devising electrode materials with novel configurations and unique properties is a feasible strategy to boost the electrochemical properties of hybrid supercapacitors. This research demonstrates an effective two-step strategy to construct N,S co-doped porous carbon (NSC) sphere supported CoS nanoparticles with phosphate functionalization (P-NSC/CoS). Benefiting from the active multi-components, the electrochemical features of CoS can be remarkably modulated after the NSC and phosphate modifications. As the cathode material for the supercapacitor, the acquired P-NSC/CoS composite delivers a splendid capacity of 436.5 C g−1 at 1 A g−1 and a superb cycling property of 91.5% after 10 000 cycles at 10 A g−1 in 6 M KOH. Furthermore, the Fe2O3 nanocrystals with ultrafine size are in situ deposited on NSC via a solvothermal-calcination process. The NSC/Fe2O3 composite presents a sizeable capacitance of 433 F g−1 at 1 A g−1 with 100.6% capacitance retention after 10 000 cycles. More significantly, it is inspiring that the assembled P-NSC/CoS//NSC/Fe2O3 hybrid supercapacitor delivers an energy density of up to 64.3 W h kg−1 at 873.6 W kg−1 and a splendid cycling stability of 94.2% after 10 000 cycles at 5 A g−1 in 6 M KOH. The appreciable data demonstrate that the prepared advanced electrode materials and the hybrid supercapacitor display excellent application prospects in energy storage.
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IONICS
·
2022
·Vol. 29
·期 1
·183-191
·
IF 2.961
Wang Yang,Liang Xin,Wu Xiaolong,Wang Lulu,Xu Kun,Sun Yi,Wang Jiazhao,Xiang Hongfa
Li–S batteries have been
considered as the most desirable candidate for next-generation batteries because of their high energy density and low cost, although the problems of the insulating nature of S and Li 2 S and the “shuttle effect” of polysulfides in Li–S batteries have to be addressed. In this work, we propose NaCl templates and a solid–liquid coexistence strategy to synthesize an N-doped carbon matrix with interconnected micro-mesoporous structure. Benefiting from the critical state of solid–liquid coexistence at the melting point of NaCl and a pretreatment by pressure, a unique porous structure with an interconnected network of micropores and mesopores is obtained. The micropores can prevent the dissolution of polysulfides, the mesopores can increase the S loading, and the interconnected pore network can significantly improve the usage of active materials. As a result, the cathode with the N-doped carbon matrix shows improved electrochemical performances.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Mingjie Cai,Yanping Liu,Kexin Dong,Chunchun Wang,Shijie Li
S-scheme heterojunction structure can endow the photocatalysts with high-performance photo-degradation of pharmaceuticals and personal care products (PPCPs) since it can remain the photogenerated electrons/holes with stronger redox ability. Herein, an integrative S-scheme heterojunction photocatalyst building from Cd 0.5 Zn 0.5 S nanoparticles and BiOCl microflowers with oxygen vacancies (OVs) was developed. Moreover, the in-situ grown process ensures the firm contact and intense electron coupling between BiOCl and Cd 0.5 Zn 0.5 S. As a result, Cd 0.5 Zn 0.5 S/BiOCl exhibited a significant reinforcement of photo-activity and stability for the abatement of antibiotic norfloxacin, manifesting a 2.8-fold or 9.6-fold enhancement compared to pristine Cd 0.5 Zn 0.5 S or BiOCl. Cd 0.5 Zn 0.5 S/BiOCl also shows good resistance to alkaline, sodium salts and humic acid. The performance of Cd 0.5 Zn 0.5 S/BiOCl to photocatalytically degrade other PPCPs with different molecular structures was further confirmed. At last, the ability of Cd 0.5 Zn 0.5 S/BiOCl for PPCPs de-toxicity was verified by evaluating the toxicity of norfloxacin and its degradation intermediate. This study demonstrates a new S-scheme heterojunction photocatalyt for efficient removal of PPCPs as well as provides some insights into developing high-performance metal sulfide solid-solution-based S-scheme heterojunctions for water decontamination.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Siming Ren,Mingjun Cui,Xinyu Chen,Shixiang Mei,Yujie Qiang
Carbon steel is the most widely used engineering material , and its corrosion is one of the main areas of concern in many industries. The most practical approach to control this problem is to use corrosion inhibitors . Currently, because of their good water solubility, excellent chemical stability, low cost and nontoxic features, carbon dots (CDs), especially heteroatom-doped CDs, have been developed as green corrosion inhibitors, but the corrosion inhibition efficiency and underlying mechanisms of single- or dual-element doping have not yet been accurately compared and analyzed. Inspired by this, eco-friendly nitrogen-doped and nitrogen, sulfur codoped CDs ( N -CDs and N,S-CDs) are prepared via a one-step hydrothermal process, and a comparative study on their inhibition performance for carbon steel corrosion in strong acidic solution is performed. The results show that both N -CDs and N,S-CDs can restrain the corrosion of carbon steel, and their inhibition efficiency increases with increasing concentration and immersion time, reaching approximately 87.9% ( N -CDs) and 96.4% (N,S-CDs) at 200 ppm after 1 h of immersion. Molecular dynamics simulation indicates that the strong interaction ability between N,S-CDs and the Fe substrate leads to higher corrosion inhibition performance than the single N doping case, benefiting from the multi-anchor adsorption of N,S-CDs on carbon steel in a strong acidic solution. Therefore, the facile preparation, eco-friendliness and high corrosion inhibition performance of N,S-CDs will provide a new approach for designing highly efficient carbon dots and broadening the application of carbon dots in the corrosion field.
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Science China-Chemistry
·
2022
·Vol. 65
·期 9
·1829-1837
·
IF 10.138
Shi Yue,Zhang Dan,Miao Hongfu,Wu Xueke,Wang Zuochao,Zhan Tianrong,Lai Jianping,Wang Lei
Molybdenum disulfide (MoS 2 ) has become a competitive candidate for efficient and economical hydrogen evolution reaction (HER). Compared with 1T-MoS 2 , 2H-MoS 2 possesses exceptional thermodynamic stability but still suffers from low active site density, poor conductivity, and weak hydrogen bonding in the wide pH range. Herein, 2H-MoS 2 nanoflowers with phosphorus doping, sulfur vacancies and crystalline-amorphous heterojunction were synthesized via phosphorus-assisted rapid calcination method. Benefiting from the cooperative interaction of multiple strategies, the prepared 2H-MoS 2 nanoflowers firstly achieve efficient pH-universal HER at high current densities. Experimental results show that in alkaline, acidic, and neutral media, MoS 2 -P2 requires only 332, 302, and 417 mV to drive the current density of 500 mA cm −2 and obtains 932, 1100, and 472 mA cm −2 at the potential of −0.4 V vs. RHE, respectively. Moreover, MoS 2 -P2 shows excellent stability of low and high current density in the full pH range.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Hongji Li,Dandan Wang,Chun Miao,Fengwu xia,Yubo Wang,Yutong Wang,Chunbo Liu,Guangbo Che
Photo-degradation of pollutant and photo-reduction of CO 2 are efficient ways to address challenges of water pollution , the greenhouse effect and energy crisis, respectively. In our work, via fastening two-dimensional (2D) BiOI nanoplates on 2D g-C 3 N 4 nanosheets , a BiOI/g-C 3 N 4 (BI/CN) S-scheme photocatalyst with closely stacked structure were prepared though a self-assembly process. The prepared BI/CN S-scheme heterojunction could improve the transfer and separation efficiency of photo-generated electron-hole pairs by facilitating the electrons transfer from BiOI to g-C 3 N 4 . Under visible light exposure, the photo-degradation efficiencies of tetracycline hydrochloride (TC) and p-chlorophenol (4-PC) by BI/CN-50% reached nearly 100% and 46%, respectively, which were more excellent in comparison with other samples. And BI/CN-50% sample exhibited the best CO production (12.45 μmol∙g −1 ) with visible-light irradiation of 4 h. This value was approximately 4.37 and 5.41 times higher than that of BI (2.85 μmol∙g −1 ) and CN materials (2.30 μmol∙g −1 ), respectively. Moreover, the excellent photocatalytic performance had no visible decay during five cycles. Meanwhile, an S-scheme charge transfer process was confirmed by species trapping experiments and electron spin-trap analysis. This study offers new insights into the activity, kinetics, and mechanism over BiOI-based materials for photocatalysis technology .
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Jiangfu Zheng,Yaocheng Deng,Changzheng Fan,Xiaoming Li,Daoxin Gong,Changwu Li,Ziyi Ye
The construction of an S-scheme heterojunction is an effective way to enhance the photocatalytic activity of composite materials. Thus, a co-precipitation method is combined with a hydrothermal synthesis method in this study to synthesize an S-scheme heterojunction of Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH photocatalyst with an exceptional morphology like a coral reef. On this basis, an AP0.5BWLDH0.3/PMS/Vis reaction system is constructed. The prepared Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH composites present better oxidation performance than pure Bi 2 WO 6 , Zn-Al LDH and Ag 3 PO 4 , with 100% Nitenpyram (50 mg/L) degraded within 90 min due to the photocatalytic activation of peroxymonosulfate. The significant increase in photocatalytic activity is not only due to the uniformly distributed coral reef-shaped nanostructures but also the extended life of the carrier with strong redox capability through S-scheme heterojunction. During the simulated exposure to sunlight, the internal electric field, optimized energy band structure, as well as coulomb force interaction all contributed to the promotion of the transportation of electron-hole pairs in the Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH composite. For this reason, electrons and holes have high reducing and oxidizing properties, which make the composites have high redox capacity. Then the radical trapping experiments, ESR testing and XPS analysis were used to verify these results. It was revealed that the S-scheme heterojunction mechanism was suitable for the electron migration in a photocatalyst. This study extends the design and preparation ideas of new S-scheme heterojunction photocatalysts and then proposes effective strategies to solve future water pollution .
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Advanced Electronic Materials
·
2022
·Vol. 9
·期 1
·2200414
·
IF 7.633
Wen Huang,Tianxiong Ju,Ruipeng Li,Yajun Duan,Yanan Duan,Junji Wei,Lei Zhu
High energy density, high temperature, and low loss dielectric polymers have drawn increasing attention in research owing to their potential applications in power electronic and pulsed power devices. In this study, a new class of organo-soluble dipolar glass polymers (DGPs) are synthesized via polycondensation and post-functionalization of poly(aryl ether)s (PAEs) based on phenolphthalin. Due to the nonplanar backbone structure, the strongly dipolar side groups (-SO 2 CH 3 and -CH 2 CH 2 CN) can easily rotate in these PAEs. As a result, desirable physical properties are obtained: high dielectric constant (4.4–5.6), high glass transition temperature (155–180 °C), good mechanical property, and low dielectric loss (dissipation factor < 0.005). Among them, cyanolized poly(aryl ether nitrile) exhibit the highest discharged energy density of 8.6 J cm −3 at 650 MV m −1 and room temperature with a high discharged efficiency of 94.3%. At 100 °C, cyanolized poly(ether ether ketone) shows the highest discharged energy density of 7.3 J cm −3 at 600 MV m −1 with a discharged efficiency of 91%. Furthermore, these functionalized PAEs exhibit good mechanical toughness with a tensile strength at a break of 60-120 MPa and elongation at a break of ≈5%. Based on their thermal, mechanical, and dielectric properties, these phenolphthalin-based PAEs are promising for potential applications such as film capacitors.
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RSC Advances
·
2022
·Vol. 12
·期 32
·20838-20849
·
IF 4.036
Hanzhang Ye,Yongli Ding,Tingting Liu,Jiani Li,Qi Wang,Yuhao Li,Jingjing Gu,Zhanen Zhang,Xuedong Wang
Traditional bimetallic sulfide-based nanomaterials often have a small specific surface area (SSA), low dispersion, and poor conductivity, thereby limiting their wide applications in the nanozyme-catalytic field. To address the above issues, we herein integrated NiCo2S4 with N,S-rGO to fabricate a nanocomposite (NiCo2S4@N,S-rGO), which showed a stronger peroxidase–mimetic activity than its pristine components. The SSA (155.8 m2 g−1) of NiCo2S4@N,S-rGO increased by ∼2-fold compared to NiCo2S4 with a pore size of 7–9 nm, thus providing more active sites and charge transfer channels. Based on the Michaelis–Menten equation, the affinity of this nanocomposite increased 40% and 1.1∼10.6-fold compared with NiCo2S4 with N,S-rGO, respectively, highlighting the significant enhancement of the peroxidase-like activity. The enhanced activity of this nanocomposite is derived from the joint participation of ˙OH, ˙O2−, and photogenerated holes (h+), and was dominated by h+. To sum up, N,S-codoping, rich S-vacancies, and multi-valence states for this nanocomposite facilitate electron transfer and accelerate reaction processes. The nanocomposite-based colorimetric sensor gave low detection limits for H2O2 (12 μM) and glucose (0.3 μM). In comparison with the results detected by a common glucose meter, this sensor provided the relative recoveries across the range of 97.4–101.8%, demonstrating its high accuracy. Moreover, it exhibited excellent selectivity for glucose assay with little interference from common co-existing macromolecules/ions, as well as high reusability (>6 times). Collectively, the newly developed colorimetric sensor yields a promising methodology for practical applications in H2O2 and glucose detection with advantages of highly visual resolution, simple operation, convenient use, and satisfactory sensitivity.
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