Small
·
2022
·Vol. 18
·期 20
·2108094
·
IF 15.153
Chongchao Yao,Jiaxin Li,Zhihao Zhang,Chunli Gou,Zhongshen Zhang,Gang Pan,Jing Zhang
Projecting a cost-effective and highly efficient electrocatalyst for the oxygen reaction reduction (ORR) counts a great deal for Zn-air batteries. Herein, a hierarchical core–shell ORR catalyst (Co 2 N/CoP@PNCNTs) is developed by embedding cobalt phosphides and/or cobalt nitrides as the core into N, P-doped carbon nanotubes (PNCNTs) as the shell via one-step carbonization, nitridation, and phosphorization of pyrolyzing Co-MOF precursor. The globally N, P-doped structure of Co 2 N/CoP@PNCNTs demonstrates an outstanding electrocatalytic activity in the alkaline solution with the onset and half-wave potentials of 1.07 and 0.85 V respectively. Moreover, a Zn-air battery assembled from Co 2 N/CoP@PNCNTs as the air cathode delivers an open circuit potential of 1.49 V, a maximum power density of 151.1 mW cm −2 and a specific capacity of 823.8 mAh kg −1 . It is reflected that Co 2 N/CoP@PNCNTs provides a long-term durability with a slight decline of 15 h in the chronoamperometry measurement and an excellent charge–discharge stability with negligible voltage decay for 150 h at 10 mA cm −2 in Zn-air batteries. The results reveal that Co 2 N/CoP@PNCNTs has superiority over most Co-N x -C or Co x P@C catalysts reported so far. The excellent catalytic properties and stability of Co 2 N/CoP@PNCNTs derive from synergistic effects between Co 2 N/CoP and mesoporous N, P-doped carbon nanotubes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiangfu Zheng,Changzheng Fan,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Jinglin Ding,Shengxiang Rong,Zhuo Chen,Jun Luo,Baowei Zhang
A novel hexagonal AgBr/Zn-Al MMO S-scheme photocatalyst was prepared by adopting a simplified hydrothermal and co-precipitation method. The prepared photocatalytic system exhibited excellent photocatalytic performance in degradation of tetracycline hydrochloride (TC). In particular, the ABMO0.2/Vis system generated the best TC removal rate (95%) within 60 min of visible light irradiation. Moreover, no significant decrease of the photocatalytic performance had been observed after four cycles, while the leaching of silver ions was effectively controlled. The excellent photocatalytic performance can be attributed to the synergistic effect occurring between the unique morphological structure and the S-scheme heterojunction charge transfer mechanism, since that that synergistic effect enhanced light absorption capacity and separation efficiency of the photogenerated carriers and the redox ability. In addition, liquid chromatography-mass spectrometry (LC-MS) analysis clarified the mineralization behavior and detailed decomposition pathways of TC. This work opens a new pathway for the design of efficient S-scheme heterojunctions and provides new insights into the photocatalytic degradation mechanism of antibiotics.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 33
·15777-15788
·
IF 4.682
Guo Junjie,Zhao Zongbin,Leng Changyu,Li Yong,Xiao Jian,Wang Xuzhen,Wang Luxiang,Jia Dianzeng,Wan Wubo,Qiu Jieshan
Abstract With the increase in environmental protection requirements, the oil in the wastewater from offshore oil wells or industries has to be removed with high-precision before discharge. However, the oil-in-water emulsion with high stability is intractable, which makes the oil removal a great challenge. Herein, we designed a novel approach to fabricate carbon fiber cloth with cutting effect that can separate oil-in-water emulsion efficiently. Carbon fibers were firstly modified by ZIF-8 nanoparticles through a hydrothermal method, which induced an ultrafast growth of vertical zinc blades during subsequent electrodeposition (100 s). The blade-like Zn nanosheets on carbon fiber cloth (B-Zn/CFs) were assembled into a superhydrophilic/underwater superoleophobic hierarchical structure, which have the capability of rupturing oil-in-water emulsion via unique cutting effect of the zinc blades. High separation efficiency of 99.72% with exceptional emulsion flux of 962.95 L m −2 h −1 bar −1 , and remaining above 98.53% after 10 cycles were achieved over the composite materials. In addition, the underwater superoleophobic property of B-Zn/CFs persisted even after ultrasonic treatment and salt solution immersion. It is demonstrated that the composite materials show excellent recyclability, mechanical stability and environmental stability during oil/water separation. This work provides a new pathway to design functional materials for high-precision oil removal from wastewater. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Tingting Wang,Ying Han,Peiwen Xu,Xinzhen Feng,Weijie Ji,Hamidreza Arandiyan
A multifunctional electrocatalyst for water splitting and zinc-air battery involves totally-three reactions, namely, oxygen reduction, oxygen evolution, and hydrogen evolution, and is very demanding and challenging. The current study provided an interesting example to achieve such a goal by establishing hierarchical architecture of Fe 2 Ni 3 nanoalloys/N‑incorporated flower-like carbon matrix (Fe 2 Ni 3 -NFCM). The resulting material is free of noble metals and can simultaneously promote the three reactions with excellent activity and robust durability. Significantly, the outstanding parameters ƞ 10 = 280 mV (oxygen evolution), ƞ 10 = 144 mV (hydrogen evolution), and E 1/2 = 0.84 V vs RHE (oxygen reduction) can be accomplished over Fe 2 Ni 3 -NFCM. Moreover, a voltage as low as 1.50 V (10 mA cm −2 ) and a 76-h durability for water-splitting has been achieved. The assembled Zn-air battery employing the current material as the electrodes can provide the power density being ∼ 122 mW cm −2 plus robust cyclic durability. The multifunctional performance reaches the top level among the various counterparts, the structure-performance correlation has been elucidated and the active species/sites identified through the advanced characterizations and detailed comparison investigations.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Jiaojiao Cao,Yubo Lian,Huatao Weng,Zhenyu Chen
The effect of an external DC electric field on the inhibition behavior of Zn-MOFs in 0.5 mol/L NaCl solution for copper was investigated via electrochemical measurements and various characterization techniques. Results indicated that the corrosion inhibition efficiency of the Zn-MOFs decreased under strong electric field intensities, which went from 94.2% to 61.7%. The corrosion inhibition efficiency of the materials decreased with increasing electric field duration when maintained at a certain electric field intensity. When the electric field duration time was 6 h, 12 h, 18 h and 24 h, the corresponding efficiency was 90.4%, 86.8%, 78.2% and 61.7% respectively. The effect of an electric field on the corrosion inhibition performance of the Zn-MOFs could essentially be attributed to changes in the structure of the material framework.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xianhui Peng,Yang Liu,Siqi Hu,Pengfei Zheng,Yidan Fu,Peng Dong,Jie Xiao,Lina Han,Yingjie Zhang
Due to the bonding force between the surface Co atom and the adsorbed intermediate are so strong that intermediate cannot desorb from Co atom, the oxygen reduction reaction of Co 2 P based electrocatalyst cannot satisfy the commercialized application of the Zn-air battery. In this work, a GO-induced assembly strategy was designed to construct cobalt phosphide (Co 2 P) nanoparticles encapsulated in N-doped carbon nanotubes (Co 2 P@NCNTs). The experimental results show that adding graphene oxide (GO) content has a significant impact on the formation of well-defined Co 2 P@NCNTs nanotubes structures and the exaltation of the graphitization degree. Benefitting from the synergistic effect between N-doped nanotubes and Co 2 P, the Co 2 P@NCNTs-15 electrocatalysts exhibited better catalytic performance, a more positive onset potential (0.90 V vs RHE) and half-wave potential (0.82 V vs RHE), maximum limiting diffusion current density (5.5 mA cm −2 ) and Tafel slope only 73 mV dec −1 . The potential gap (ΔE) between E j=10 of OER and ORR half-wave potential (E 1/2 ) of Co 2 P@NCNTs-15 is only 0.93 V, which lower than Pt/C electrocatalyst (1.15 V). More importantly, the Co 2 P@NCNTs-15-based rechargeable Zn-air battery performed the highest peak power density (159.7 mW cm −2 ), specific capacity (792.6 mAh g −1 at 10 mA cm −2 ) and remarkable cycle stability. This method also offers a high yield and cost-effective synthesis strategy for preparing the other transition metal phosphide electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Guijun Li,Yibo Tang,Tiantian Fu,Yang Xiang,Zhongping Xiong,Yujun Si,Chaozhong Guo,Zhiqiang Jiang
The development of efficient and cost-effective bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for the commercialization of rechargeable metal-air batteries. Herein, the pyrolysis of a precursor containing g-C 3 N 4 , thiourea, cobalt chloride and ferric chloride was used to fabricate S, N co-doped carbon nanotubes functionalized with Co 3 Fe 7 alloy nanoparticles (CoFe/S-N-C). The obtained CoFe/S-N-C catalyst exhibited an ORR half wave potential of 0.855 V ( vs . RHE) in 0.1 M KOH, outperforming a commercial Pt/C catalyst ( E 1/2 = 0.844 V). The catalyst also demonstrated superior OER catalytic activity (1.588 V at 10 mA cm −2 ) relative to RuO 2 in 0.1 M KOH, thus displaying outstanding bifunctional ORR and OER activity. A rechargeable Zn-air battery fabricated using CoFe/S-N-C shows good very performance (maximum power density of 120 mW cm −2 with a specific capacity of 814 mAh g −1 ) which was superior to a Zn-air battery fabricated using Pt/C and RuO 2 as ORR and OER catalysts (92 mW cm −2 and 787 mAh g −1 , respectively). Further, the fabricated battery using CoFe/S-N-C showed good stability, offering a discharge voltage ∼ 1.10 V and a recharge voltage ∼ 2.15 V at 10 mA cm −2 over 300 cycles, evidence of the durability of the CoFe/S-N-C catalyst.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Xiaojun He,Feng Ding,Xiaoshuai Sun,Yujing Zheng,Wei Xu,Lisong Ye,Hong Chen,Jianliang Shen
Zinc/Zn(II) is an essential trace element for humans and acts as an important substance that maintains the normal growth, development, and metabolism of the body. Excess or deficient Zn(II) can cause abnormal metabolism in the human body, leading to a series of diseases. Moreover, biosystems have complex homeostasis systems, especially harsh pH (OH–) environments. Thus, investigating the variation in the levels of Zn(II) and OH– is extremely important in clinical, medical, and environmental testing. Nevertheless, the lack of practical and convenient fluorescence imaging tools limits the tracing of Zn(II) and OH– in biosystems. In this work, a well-designed dual-channel fluorescent signal response chemosensor (DACH-fhba) was assembled for selective sensing of Zn(II) and OH– in the biosystem using a fluorescence turn-on strategy. On encountering Zn(II), the chemosensor emitted a blue fluorescence signal (455 nm). Meanwhile, the bright green fluorescence signal (530 nm) increased with OH– addition simultaneously. With the blue/green dual fluorescence response of DACH-fhba, the sensor exhibited high stability and reversibility. Notably, the bioimaging revealed that DACH-fhba successfully tracked Zn(II) and OH– in live cells, larval zebrafish, and plants. Further results implied that DACH-fhba can be used to achieve visual detection of Zn(II) and OH– in organisms. Altogether, this work is conducive to the monitoring of Zn(II) and OH– in organisms and promotes the understanding of the function of Zn(II) and OH– in biosystems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Lin Zhong,Hu Zhou,Ruifeng Li,Hao Cheng,Sheng Wang,Boyuan Chen,Yongyue Zhuang,Junfeng Chen,Aihua Yuan
Developing highly efficient oxygen electrocatalysts is of vital importance for rechargeable Zn-air batteries (ZABs). Herein, Co/CoO x nano-heterojunctions encapsulated into nitrogen-doped carbon sheets (NCS@Co/CoO x ) are fabricated via a dual-template-guided approach by using zeolitic imidazolate frameworks (ZIFs) as templates. The synergistic integration of structural and compositional advantages endows such catalyst with superior catalytic properties to benchmark noble-metal catalysts. To be specific, the hierarchical micro/mesopores affords massive mass transport channels and maximizes the exposure of accessible active sites, whereas the NCS matrix accelerates electron transfer and prevents the self-aggregation of active species during the electrocatalytic reaction. Moreover, abundant and synergistic Co-based active sites (CoO, Co 3 O 4 , Co-N x ) greatly promote the catalytic activity. As the cathode of both liquid and flexible solid-state ZABs, excellent device properties are achieved, outperforming those assembled with commercial Pt/C+RuO 2 catalyst. This work presents a feasible and cost-effective strategy for developing oxygen electrocatalysts derived from ZIFs templates.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 30
·9599-9609
·
IF 7.393
Cong Shen,Yanqing Zhu,Zixiao Li,Jingling Li,Hong Tao,Jianhua Zou,Xueqing Xu,Gang Xu
InP quantum dots (QDs) are considered as the most promising alternative to Cd-based QDs with lower toxicity, and emission spectrum tunability ranging from the visible to near-infrared region. Although high-quality fluorescent InP QDs have been successfully synthesized by several groups, the rigorous synthesis conditions hinder its practical use in display devices. In this work, for the first time, we introduce Zn2+ into the growth stage of the InP QDs to prepare an InP–In(Zn)P core, and then the as-grown InP–In(Zn)P cores were consecutively coated with typical double shells of inner ZnSe and outer ZnS. The final InP–In(Zn)P/ZnSe/ZnS core/shell/shell QDs exhibited a maximum photoluminescence (PL) quantum yield (QY) of 94.3% and have tunable emissions from yellow (569 nm) to red (630 nm), showing a potential application in display devices. Above all, compared with other related studies, the excellent PL properties were obtained in relatively milder conditions (ultimate vacuum level of 400 mTorr). The results of this study provide guidance for the commercial application of InP QDs as a viable alternative to Cd-based QDs.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 31
·期 8
·2008033
·
IF 16.836
Ying Liu,Yue Jiang,Zhe Hu,Jian Peng,Weihong Lai,Dianlun Wu,Shouwei Zuo,Jing Zhang,Bin Chen,Ziwen Dai,Yingguo Yang,Yang Huang,Wei Zhang,Wei Zhao,Wang Zhang,Lei Wang,Shulei Chou
Vanadium-based materials are fascinating potential cathodes for high energy density Zn-ion batteries (ZIBs), due to their high capacity arising from multi-electron redox chemistry. Most vanadium-based materials suffer from poor rate capability, however, owing to their low conductivity and large dimension. Here, we propose the application of V 2 C MXene (V 2 CT x ), a conductive 2D nanomaterial, for achieving high energy density ZIBs with superior rate capability. Through an initial charging activation, the valence of surface vanadium in V 2 CT x cathode is raised significantly from V 2+ /V 3+ to V 4+ /V 5+ , forming a nanoscale vanadium oxide (VO x ) coating that effectively undergoes multi-electron reactions, whereas the inner V-C-V 2D multi-layers of V 2 CT x are intentionally preserved, providing abundant nanochannels with intrinsic high conductivity. Owing to the synergistic effects between the outer high-valence VO x and inner conductive V-C-V, the activated V 2 CT x presents an ultrahigh rate performance, reaching 358 mAh g −1 at 30 A g −1 , together with remarkable energy and power density (318 Wh kg −1 /22.5 kW kg −1 ). The structural advantages of activated V 2 CT x are maintained after 2000 cycles, offering excellent stability with nearly 100% Coulombic efficiency. This work provides key insights into the design of high-performance cathode materials for advanced ZIBs.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 30
·15042-15050
·
IF 11.301
Lu Han,Hailong Huang,Junfeng Li,Xinlu Zhang,Zhongli Yang,Min Xu,Likun Pan
With the rapid development of flexible wearable electronic devices and the growing energy demands of modern society, flexible energy storage equipment is attracting increasing attention. Recently, flexible Zn-ion hybrid supercapacitors (ZHSs), as a new type of flexible energy storage device, have been reported. However, the limited energy density of the currently reported flexible ZHSs should be further improved to realize their large-scale applications. Herein, we designed a novel redox bromide-ion additive hydrogel electrolyte (SA–Zn–Br) for flexible Zn-ion hybrid supercapacitors (BH-ZHSs) via the introduction of extra faradaic contributions (3Br−/Br3−) into the hydrogel electrolyte to improve their energy density. Additionally, the assembled flexible BH-ZHS displays a maximum energy density of 605 W h kg−1 at a power density of 1848 W kg−1 at an amazing voltage of 2.6 V, which is better than that of most reported flexible ZHSs. After a 5000 cycle charge/discharge cycling test, capacity retention of 87.7% is retained. Interestingly, the strong interactions between the charged groups and Zn2+ ion in the SA–Zn–Br hydrogel electrolyte can harmonize Zn2+ migration with uniform nucleation on a Zn foil surface, leading to layered zinc deposition. Additionally, the SA–Zn–Br hydrogel electrolyte can also serve as an inhibitor of water/oxygen, resulting in the mitigation of corrosion and highly reversible zinc stripping/depositing. The strategy described in this study should provide a new insight for exploring flexible ZHSs with boosted energy density and controllable zinc deposition.
✓ 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）