ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Abubakar Yakubu Haruna,Yubo Luo,Zheng Ma,Wang Li,Haiqiang Liu,Xin Li,Qinghui Jiang,Junyou Yang
The thermoelectric performance of n-type Bi2Te3 needs further enhancement to match that of its p-type Bi2Te3 counterpart and should be considered for competitive applications. Combining Cu/Cl and multiscale additives (AgBiSe2) presents a suitable route for such enhancement. This is evidence of the enhanced thermoelectric performance of Bi1.995Cu0.005Te2.69Se0.33Cl0.03. Moreover, by incorporating 0.65 wt % AgBiSe2 (ABS) into Bi1.995Cu0.005Te2.69Se0.33Cl0.03, we further reduce its lattice thermal conductivity to ∼0.28 W m–1 K–1 at 353 K owing to the extra phonon scattering of multiscale ABS. Additionally, the Seebeck coefficient enhances (−183.89 μV K–1 at 353 K) owing to the matrix’s reduced carrier concentration caused by ABS. As a result, we achieve a high ZT of ∼1.25 (at 353 K) and a high ZTave of ∼1.12 at 300–433 K for Bi1.995Cu0.005Te2.69Se0.33Cl0.03 + 0.65 wt % ABS. This work provides a promising strategy for enhancing the thermoelectric performance of n-type Bi2Te3 through Cu/Cl doping and ABS incorporation.
研究领域:
材料科学
·
能源材料
·
热电材料优化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Yi Wang,Shaoqi Zhang,Yuxiang Yan,Hengdong Ren,Jian Chen,Lizhe Liu,Xinglong Wu
A series of flower-like BiOCl x Br 1-x (x = 0∼1) with different Cl − doping contents were prepared via a simple co-precipitation method. Experimental results show that BiOCl 0.2 Br 0.8 (20 mg) can decompose tetracycline hydrochloride (20 mg/L) of ∼100% within 30 min, which is far higher than those of the previously reported BiOCl and BiOBr. Microstructural and spectroscopic characterization demonstrates that Cl − doping can effectively change the growth orientation of the layered BiOCl x Br 1-x nanosheets to expose more (102) active surfaces. Density of states calculations and radical trapping experiments reveal that strong coupling between the electronic states of multi-anions adjusts the band structure, which improves light absorption and generation of main active species ⋅O 2 − . Meanwhile, strong polarization caused by anionic doping also promotes separation and migration of the photogenerated carriers to different positions of the active surface. As a result, the photocatalytic activities are improved largely and optimal in BiOCl 0.2 Br 0.8 .
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yanli Zhang,Zongchao Zhu,Yiheng Gu,Han Chen,Yifeng Zheng,Lin Ge
In this paper, a novel Cl − anion doping strategy is proposed to modify the electrochemical performance of Sr 2 Fe 1.5 Mo 0.5 O 6− δ (SFM) cathode for solid oxide fuel cells. A series of Cl-doped Sr 2 Fe 1.5 Mo 0.5 O 6− x − δ Cl x (SFMCl x , x = 0, 0.1, 0.2, 0.3, 0.4) materials is synthesized by the citric acid–glycine combustion method, and the effect of Cl doping on the crystal structure and electrochemical performance is systemically investigated. The doping of Cl into the SFM leads to the lattice expansion, and the electrochemical performance of Cl-doped SFMCl x cathodes is effectively improved as a result of the enhanced mobility of lattice oxygen introduced by Cl doping. The optimal composition with x = 0.2 (sample Sr 2 Fe 1.5 Mo 0.5 O 5.8− δ Cl 0.2 , noted as SFMCl0.2) exhibits a minimum polarization resistance R p value of 1.987 Ω cm 2 at 600 °C, reduced by 38.04% compared with the SFM cathode. These results suggest that Cl doping is an effective strategy to improve the electrochemical properties of cathode for solid oxide fuel cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2022
·Vol. 29
·期 2
·110-119
·
IF 0
Zhang Zongping,Xu Jie,Zhang Dongmei,Ma Huijuan,Li Tao,Xiao Ting,Pei Cunyuan,Ni Shibing
The safe operating voltage and low volume variation of Li 3 VO 4 (LVO) make it an ideal anode material for lithium (Li)-ion batteries. However, the insufficient understanding of the inner storage mechanism hinders the design of LVO-based electrodes. Herein, we investigate, for the first time, the Li-ion storage activity in LVO via Cl doping. Moreover, N-doped C coating was simultaneously achieved in the Cl doping process, resulting in synergistically improved reaction kinetics. As a result, the as-prepared Cl-doped Li 3 VO 4 coated with N-doped C (Cl-LVO@NC) electrodes deliver a discharge capacity of 884.1 mAh/g after 200 cycles at 0.2 A/g, which is the highest among all of the LVO-based electrodes. The Cl-LVO@NC electrodes also exhibit high-capacity retention of 331.1 mAh/g at 8.0 A/g and full capacity recovery after 5 periods of rate testing over 400 cycles. After 5000 cycles at 4.0 A/g, the discharge capacity can be maintained at 423.2 mAh/g, which is superior to most LVO-based electrodes. The Li-ion storage activity in LVO via Cl doping and significant improvement in the high-rate Li-ion storage reported in this work can be used as references for the design of advanced LVO-based electrodes for high-power applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
LANGMUIR
·
2023
·
IF 3.9
Yuwen Sun,Baogui Zheng,Xiaowen Wu,Lianyi Wang,Jiacheng Jiang,Hao Ding,Xin Min,Zhaohui Huang,Minghao Fang,Ruiying Luo
Graphitized carbonitride (g-C3N4) is widely used in CO2 reduction, hydrogen production, and degradation of toxic chemical dyes and antibiotics. It is a kind of photocatalytic material with excellent performance, and it has the advantages of being safe and nontoxic, having a suitable band gap (2.7 eV), and having a simple preparation and high stability, but because of its fast optical recombination speed and low visible light overutilization, the multifunctional application of g-C3N4 is seriously hindered. Compared with pure g-C3N4, MWCNTs/g-C3N4 have a red-shift in the visible range and a strong absorption in the visible region. Melamine and carboxylated multiwalled carbon nanotubes were used as raw materials to successfully prepare CMWCNT modified g-C3N4 doped with P, Cl by a high temperature calcination method. The effect of the addition amount of P, Cl on the photocatalytic performance of modified g-C3N4 was studied. The experimental results show that the multiwalled carbon nanotubes can accelerate the electron migration, and the doping of P, Cl elements can change the energy band structure of g-C3N4 and reduce the band gap. Through fluorescence analysis and photocurrent analysis, it is known that the incorporation of P, Cl reduces the recombination efficiency of photogenerated electron–hole pairs. In order to explore the application in the degradation of chemical dyes, the photocatalytic degradation efficiency of RhB under visible light was studied. The photocatalytic performance of the samples was evaluated by photodecomposition of aquatic hydrogen. The results showed that when the amount of ammonium dihydrogen phosphate was 10 wt %, the photocatalytic degradation efficiency was the highest, which was 21.13 times higher than that of g-C3N4.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Shaohai Wu,Hengquan Yang,Zhengsen Wu,Chengyan Liu,Lei Miao,Jie Gao,Xiaoyang Wang,Xiuxia Wang,Chengjin Shen,Jacques G. Noudem,Jun Wang
Eco-friendly and low-cost layered SnSe2-based materials have been attracting great attention in the thermoelectric field for their intrinsically low thermal conductivity. In this work, we applied AgCl as Cl-dopant and formed Ag-rich precipitates in SnSe2 polycrystals, and their thermoelectric properties were investigated. The results demonstrate that Cl was artificially incorporated into SnSe2 by the substitution of Se atoms, playing as donor centers and thus increasing the carrier concentration by 2 orders of magnitude, leading to a tremendous improvement of the electrical conductivity and power factor. However, Ag atoms hardly enter into the Sn lattice sites and brought about the generation of Ag-rich precipitates. The complicated microstructures with multiple types of defects, such as point defects, boundaries, dislocations, and so on, result in a relatively low lattice thermal conductivity in the AgCl-introduced SnSe2 samples. Additionally, the anisotropic electrical and thermal transport properties were investigated, and the results show that higher ZT values were obtained along the pressing direction in these textured samples because of the significantly suppressed lattice thermal conductivity caused by the enhanced phonon scattering via the interior van der Waals layers. Ultimately, a maximum ZT value of 0.35 was realized at 400 °C in the polycrystalline SnSe2 with introduction of 11 mol % AgCl, which is nearly 3 times higher than that value of the pristine counterpart. It demonstrates that the combined effects of Cl-doping, Ag-rich precipitates, and texturing could effectively enhance the ZT value for polycrystalline SnSe2.
研究领域:
材料科学
·
热电学
·
固体物理学
✓ 已验证
产品关联
DOI
Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Zhan Shaoping,Hong Tao,Qin Bingchao,Zhu Yingcai,Feng Xiang,Su Lizhong,Shi Haonan,Liang Hao,Zhang Qianfan,Gao Xiang,Ge Zhen-Hua,Zheng Lei,Wang Dongyang,Zhao Li-Dong
Great progress has been achieved in p-type SnS thermoelectric compound recently, while the stagnation of the n-type counterpart hinders the construction of thermoelectric devices. Herein, n-type sulfide PbSnS 2 with isostructural to SnS is obtained through Pb alloying and achieves a maximum ZT of ~1.2 and an average ZT of ~0.75 within 300–773 K, which originates from enhanced power factor and intrinsically ultralow thermal conductivity. Combining the optimized carrier concentration by Cl doping and enlarged Seebeck coefficient through activating multiple conduction bands evolutions with temperature, favorable power factors are maintained. Besides, the electron doping stabilizes the phase of PbSnS 2 and the complex-crystal-structure induced strong anharmonicity results in ultralow lattice thermal conductivity. Moreover, a maximum power generation efficiency of ~2.7% can be acquired in a single-leg device. Our study develops a n-type sulfide PbSnS 2 with high performance, which is a potential candidate to match the excellent p-type SnS.
研究领域:
材料科学
·
热电学
·
固体物理
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 6
·1-8
·
IF 6.232
Wang Xiuli,Cheng Zhili,Zhou Yun,Tammina Sai Kumar,Yang Yaling
A fluorescence method is described for the determination of hydroquinone based on the double carbon dot system as peroxide mimic enzymes and fluorescent probes. Deep eutectic solvent (DES)–based fluorescent carbon dots (N/Cl-CDs) and copper-doped carbon dots (N/Cu-CDs) were prepared by the hydrothermal method. Both carbon dots were characterized with transmission electron microscopy (TEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, X-ray photoelectron spectrometry (XPS), Fourier transform infrared (FT-IR) spectroscopy, and fluorescence spectroscopy. N/Cl-CDs displayed intrinsic peroxidase-like activity and were able to catalyze the oxidation of hydroquinone (H 2 Q) to p-benzoquinone (BQ) along with an intermediate. The intermediate (BQ) did quench the N/Cu-CD photoluminescence (PL) at 450 nm using an excitation wavelength of 347 nm. Based on the results, a fluorescent platform is proposed for the determination of hydroquinone with a promising determination limit of 0.04 μM (linear range, 1.0–75 μM). The recoveries of spiked water samples were in the range 89.5–105.1%, with relative standard deviations (RSDs) of 1.5–2.9%. This method was applied to determination of H 2 Q in environmental water samples.
A fluorescence method was established for the determination of hydroquinone based on the double carbon dot system as peroxide-mimic enzymes and fluorescent probes. Chlorine-doped carbon dots (N/Cl-CDs) derived from deep eutectic solvent (DES) displayed intrinsic peroxidase-like activity, and were able to catalyze the oxidation of hydroquinone (H2Q) to p-benzoquinone (BQ) along with an intermediate. The intermediate (BQ) did quench the N/Cu-CD photoluminescence (PL). This method was applied to H2Q in environmental water samples.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）