Journal of Energy Storage
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2023
·
IF 9.4
Haonan Zhang,Lin Fang,Yuanchao Guo,Zhongzhu Wang,Haibo Hu,Wen He,Peihong Wang
Supercapacitors (SCs) have attracted extensive attention due to the properties of high power density, long cycle life, and high rate performance. However, the high self-discharge is one giant challenge for long-term energy storage applications of SC. Herein, we prepared a high-performance SC with low self-discharge based on nitrogen-sulfur co-doped ZIF-8-derived (NS-PC) materials. The synergistic effects of high-temperature carbonization and nitrogen-sulfur (N-S) doping are systematically investigated. With a carbonization temperature of 900 °C, assisted with N-S doping, the maximum specific capacitance of the NS-PC-900//NS-PC-900 symmetrical SC is 42.7 F g −1 , while the power densities range from 650 to 13,000 W kg −1 at the energy densities of 10.04–7.5 Wh kg −1 . The specific capacitance remains 95.7 % even after 20,000 charge-discharge cycles. More importantly, the as-prepared NS-PC-900//NS-PC-900 SC exhibits an ultra-low self-discharge rate of solely 0.025 V h −1 within 24 h. This work provides a universal strategy to fabricate high-performance SCs with low self-discharge.
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NANOTECHNOLOGY
·
2023
·Vol. 35
·期 11
·115203
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IF 3.5
Qingyong Qin,Yu Liu,Ge Gao,Zhaoqiong Chen,Zejiang Gao,Li Chen,Xianci Zhong,Bingsuo Zou
Lead-free halide double perovskites are considered as one of the most promising materials in optoelectronic devices, such as solar cells, photodetectors, and light-emitting diodes (LEDs), due to their environmental friendliness and chemical stability. However, the extremely low photoluminescence quantum yield (PLQY) of self-trapped excitons (STEs) emission from lead-free halide double perovskites impedes their applications. Herein, Sb3+ ions were doped into rare-earth-based double perovskite Cs2NaScCl6 single crystals (SCs), resulting in a large enhancement of PLQY from 12.57% to 87.37%. Moreover, by co-doping Sb3+ and Ho3+ into Cs2NaScCl6 SCs, the emission color can be tuned from blue to red, due to an efficient energy transfer from STEs to Ho3+ ions. Finally, the synthesized sample was used in multicolor LED, which exhibited excellent stability and optical properties. This work not only provides a new strategy for improving the optical properties of Cs2NaScCl6 SCs, but also suggests its potential application in multicolor LEDs.
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JOURNAL OF LUMINESCENCE
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2023
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IF 3.6
Yingzhen Wu,Lin Lin,Zheng Li,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Zhiqiang Zheng
Up to now, the research field of application of lanthanide ions doped lead-free double perovskite Cs 2 AgInCl 6 nanocrystals (NCs) was relatively limited, even less in temperature sensing. Here, Tb 3+ /Ho 3+ /Bi 3+ ions were successfully doped into Cs 2 AgInCl 6 NCs by hot-injection. The temperature sensing performance of co-doped NCs by using the fluorescence intensity ratio (FIR) was studied through the temperature-dependent emission spectra . By analyzing the influence of ions' doping concentration on temperature sensing performance, the optimal doping concentration of co-doped Cs 2 AgInCl 6 NCs was determined to be 7 % Tb 3+ , 20 % Ho 3+ and 1 % Bi 3+ . The highest absolute and relative sensitivities reach 1.48 K −1 and 2.48 %/K, respectively. We provide a new doping scheme of lead-free double perovskite NCs which have good temperature sensing performance. This co-doped NCs have great potential application value in non-contact temperature sensing in nanoscale .
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ENERGY & FUELS
·
2021
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IF 3.605
Zhihui Xu,Xuelei Li,Shishuai Sun,Zepeng Wei,Hongguo Li,Shougen Yin
The synergistic effect of the electrochemical double-layer and pseudocapacitance electrode materials has been extensively used to improve the performance of composite electrodes for supercapacitors (SCs). However, the energy density of SCs is still unsatisfactory for practical utilization. Herein, a C-NiCo2O4/C@Ni–Co–S electrode is ingeniously devised through coupling the interior of 0D/2D carbon-modified NiCo2O4 and the external sheath of Ni–Co–S nanosheets. The 0D carbon quantum dot doping can effectively avoid the agglomeration of NiCo2O4 nanoparticles and improve the electronic conductivity. 2D carbon as the intermediate layer can ameliorate the physical/chemical stability of the electrode. Ni–Co–S nanosheets can improve the area-specific capacitance of the electrode and thus enhance the energy density of the device. As expected, the C-NiCo2O4/C@Ni–Co–S electrode delivers an outstanding specific capacitance of 2396 F g–1 (7.9 F cm–2) at 3 A g–1 and excellent cycling stability (92% after 10 000 cycles). Furthermore, a quasi-solid-state asymmetric supercapacitor (ASC) using C-NiCo2O4/C@Ni–Co–S as positive electrode and active carbon (AC) as negative electrode exhibits a high energy density of 95 Wh kg–1 at 0.9 kW kg–1 and an excellent cycle performance. Our work reveals that this reasonable structure design is very effective for achieving a high-performance positive electrode for practical SC applications.
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FOOD CHEMISTRY
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2021
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IF 7.514
Liang Yao,Jiang Xu,Liwei Zhang,Tao Zheng,Lei Liu,Lei Zhang
To enhance the stability of anthocyanin, an amphiphilic peptide C6 with tryptophan amino acid was used to co-assemble with anthocyanin C3G. The characterization, stabilities, and antioxidant activity of peptide-anthocyanin (C6-C3G) nanocomposites (70.82 ± 12.41 nm) were investigated. To illustrate the interaction between peptide and anthocyanin, circular dichroism spectroscopy and fluorescence quenching method were used. Here, the peptide C6 switches from random coil structure to β-sheet structure and the fluorescence of tryptophan amino acid in peptide quenched during the intermolecular interaction between them, which was further confirmed a static quenching. The nanocomposites significantly enhance the stabilities of anthocyanin to different alkaline conditions, high temperature of 80 °C, long time storage, and various concentration of Cu 2+ ion. In addition, it maintained the excellent intrinsic capacity of anthocyanin to scavenge free radicals. The approach of using an amphiphilic peptide to enhance the stabilities of anthocyanin presents a high potential to expand its application.
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高影响因子
Colloid and Interface Science Communications
·
2021
·
IF 4.914
Yuze Zhang,Lijuan Li,Dong Shi,Fugen Song
Layered double hydroxides intercalated with sorbate anion (SLDHs) was a potential material for sorbic acid controlled-releasing, UV barrier, reinforcement of rubber and flame retardancy filler. The addition reactions of sorbate anion (SAa) with ethylene and H radical were calculated as spontaneous on B3LYP/6–311++ (d, p) theory level by GAMESS-US and the electrostatic potential (ESP) of SAa was calculated by Multiwfn package and figured by VMD. SLDHs was successfully synthesized by co-precipitation with chlorides, and intercalating way of SAa was first constructed by electrostatic potential analysis, and then the successful intercalation of SAa was confirmed by X-ray diffractions (XRD) and Fourier transform infrared spectroscopy (FTIR). SLDHs possessed assembled flaky morphology and have good thermal stability with a water contact angle near 95°. This study may have a significance on the promotion of the scale application of SLDHs practically.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Genkuo Nie,Hongyu Wang,Qi Li,Lun Pan,Yanan Liu,Zhanqian Song,Xiangwen Zhang,Ji-Jun Zou,Shitao Yu
Bio-jet fuel synthesis is a promising way to upgrade the value of lignocellulose and contributes to the sustainable development. Presently the property of bio-jet fuel is weakened by single component produced using pure feedstock and water produced in the reaction leading to acid leaching. Therefore, we synthesized a hydrophobic acid resin (R-x) and used it to catalyze lignocellulose-derived mixture upgrading to high-performance bio-jet fuel blending, where R-x shows better activity than Amberlyst-15, Nafion-212 and Hβ with 75.4% of product yield obtained in co-conversion of lignocellulosic derivatives. The better activity of R-x is ascribed to the strong acid, big acid concentration, large surface area and especially super hydrophobicity resulting as R-x recycled steadily in consecutive 5 runs. After hydrodeoxygenation , jet fuel blending with high density and excellent freezing point better than JP-7 was obtained. This work demonstrates an efficient catalyzing method to synthesize high-performance jet fuel by co-conversion of lignocellulosic derivatives.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
·
IF 3.995
Jun Liu,Meng Sun,Meng-Jie Chang,Wen-Na Cui,Cong-Miao Zhang,Fu-Rong Ni,Jing Zhang,Si-Meng Fan,Hui-Ling Du
s We present a simple methodology to construct novel Co-Pi decorated TiO 2 /Bi 4 Ti 3 O 12 nanorod (TiO 2 /BTO@Co-Pi NR) arrays as photoanode for enhanced water splitting. By using successive ionic layer adsorption and reaction (SILAR) method, controllable amounts of BiOI nanoplates were uniformly immobilized on the hydrothermal grown TiO 2 NR arrays on Fluorine-doped tin oxide (FTO) substrate. TiO 2 /BTO NR heterojunction was conveniently obtained by partial conversion of TiO 2 to high crystallized Bi 4 Ti 3 O 12 through a solid-state reaction with BiOI nanoplates at high temperature. Afterwards, Co-Pi nanoparticles were deposited on TiO 2 /BTO by photoelectrical deposition to generate TiO 2 /BTO@Co-Pi composites. Photoelectrochemical (PEC) measurements have demonstrated that the prepared TiO 2 /BTO photoanode exhibits extremely enhanced performance than pristine TiO 2 for PEC water splitting thanks to the increased visible light absorption and photogenerated charge separation efficiency. Moreover, both the photocurrent density and incident photo-to-current conversion efficiency (IPCE) were further improved after the decoration of Co-Pi. This work provides a feasible and low-cost strategy to establish TiO 2 /Bi 4 Ti 3 O 12 based photoelectrode, therefore, is suitable for practical applications.
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Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 22
·5814-5824
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IF 6.367
Ping Mu,Man Zhou,Kai Yang,Chensheng Zhou,Yuan Mi,Zhenzhen Yu,Kangqiang Lu,Zhengquan Li,Shaobo Ouyang,Weiya Huang,Changlin Yu
Using ion doping to engineer sulfur vacancies over metal sulfides is an effective method to improve photocatalytic properties, such vacancies form the center of the electron-captured state to promote the separation and transfer of photogenerated carriers. In this research, Yb/Er co-doped bulk Cd0.5Zn0.5S (CZS) was fabricated by a one-step simple hydrothermal process, and used for evaluating the catalytic activity for aquatic hydrogen production under visible light irradiation. The results showed that the Cd0.5Zn0.5S:Yb(15%), Er obtained exhibited a higher efficient photocatalytic activity of hydrogen evolution, in which the efficiency of Cd0.5Zn0.5S:Yb(15%), Er (422.0 μmol g−1 h−1) was 2.7 times higher than that of bare Cd0.5Zn0.5S (154.7 μmol g−1 h−1). This can be attributed to the augmented active surface area, the broadened spectral absorption of visible light and the facilitation of the separated efficiency of the photogenerated carriers. This finding provides a simple way to activate the metal-chalcogenides with S-vacancies for optimizing the photocatalytic performance.
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ACS Omega
·
2021
·
IF 3.512
Yida Huang,Youlong Liang,Chaoran Xie,Qingyuan Gui,Jinlei Ma,Hongxian Pan,Zeyu Tian,Lei Qi,Mei Yang
Ce1–xO2:x%Cu2+ nanobelts were bioinspired, designed, and fabricated using commercial filter papers as scaffolds by adding Cu(NO3)2 in the original sol solution of CeO2 nanobelts, which display excellent catalyst properties for CO oxidation and photocatalytic activity for organic dyes. Compared with pure CeO2, CuO belts were synthesized using the same method and the corresponding Ce0.5O2:50%Cu2+ bulk materials were synthesized without filter paper as scaffolds; the synthesized Ce1–xO2:x%Cu2+ nanobelts, especially Ce0.5O2:50%Cu2+ nanobelts, can decrease the reaction temperature of CO to CO2 at 100 °C with the conversion rate of 100%, much lower than the formerly reported kinds of Ce1–xO2:x%Cu2+ catalysts. Meanwhile, the synthesized Ce1–xO2:x%Cu2+ nanobelts also display better photocatalytic activity for organic dyes. All of these results provide useful information for the potential applications of the synthesized Ce1–xO2:x%Cu2+ nanobelts in catalyst fields.
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RENEWABLE ENERGY
·
2021
·
IF 8.001
Naveed Ahmad,Xiaoxiao Wang,Peixu Sun,Ying Chen,Fahad Rehman,Jian Xu,Xia Xu
Electrocatalytic CO 2 reduction (ECO 2 R) is an environment-friendly way to convert CO 2 into profitable products. Amine solution recently has been employed as an electrolyte in ECO 2 R but suffers from low efficiency. Herein, aqueous solutions containing different amine-based deep eutectic solvents (DESs) were used as electrolytes for CO 2 reduction. The effect of different DESs on the CO 2 reduction was investigated at Ag, Cu, and Zn metal electrodes. Tafel and electrochemical impedance spectroscopy (EIS) were applied to understand the CO 2 reduction. DES in aqueous solution facilitates the CO 2 reduction to CO with higher faradaic efficiency of CO (FE CO ) than amine solutions and a mixture of hydrogen bond acceptor (HBA) and hydrogen bond donor (HBD). Both HBD and HBA have an influence on CO 2 reduction. [Monoethanolamine hydrochloride] [methyldiethanolamine] ([MEAHCl][MDEA]) gives high FE CO , 71% FE CO at −1.1 V vs RHE at Ag electrode, 33% higher than [MEAHCl][MEA]. Experimental results and EIS analysis reveal that the facilitation of CO 2 reduction to CO probably stems from a synergistic effect of nano-size agglomerate dispersion on Ag-surface, bicarbonate formation, exchange current density , and Cl − ions present in DESs. These findings present a feasible method to employ the aqueous MDEA-based DES solution as an electrolyte for CO 2 reduction.
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ACS Applied Energy Materials
·
2021
·
IF 6.024
Yun Gao,Panpan Cui,Jie Liu,Weiwei Sun,Shuangqiang Chen,Shulei Chou,Li-Ping Lv,Yong Wang
Porous carbon materials with a synergistically large specific surface area (SBET) and an adjustable structure are urgently needed to meet the demands of high-performance supercapacitors (SCs) and other electrochemical devices. Although numerous studies have been dedicated to designing multifunctional porous carbons, most of them still have shown hard-control doping sites and unclear structures. Herein, we prepare a series of structure-controlled F/N co-doped porous carbons (FNCs) with large SBETvia an in situ doping process based on F- and N-rich covalent triazine-based frameworks (FCTFs) as precursors. The as-prepared high-F/N-containing FNC-700 with a large SBET (∼1849.1 m2 g–1) as the aqueous-based SC electrode achieves a specific capacitance (Cs) of 326 F g–1 at 1 A g–1, remarkable cyclability with negligible capacitance decay after 10,000 cycles in three-electrode systems, and a maximum energy density of 31.4 Wh kg–1 in two-electrode systems. This study has an insightful hint in exploring multifunctional heteroatom-doped carbons by the in situ doping process.
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