INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 6
·8313-8327
·
IF 4.672
Nianben Zheng,Fang Yan,Long Wang,Zhiqiang Sun
Summary Solar energy is being widely investigated due to its abundant, renewable, and clean features. Photo-thermal conversion in solar collectors is a direct approach for harvesting solar energy. Compared to the commonly used surface-based solar collectors (SSCs), nanofluid-based direct absorption solar collectors (DASCs) are more efficient. In this work, water-based mono MWCNT and hybrid MWCNT-TiN nanofluids were prepared through a two-step method, aiming at light absorption enhancement of nanofluids for applications in DASCs. The optical and photo-thermal conversion performance of the MWCNT nanofluids was firstly evaluated. The results showed that the MWCNT nanofluids presented high solar absorption capability, and the highest photo-thermal conversion efficiency was obtained at 10 ppm. The TiN nanoparticles were subsequently incorporated to form the hybrid MWCNT-TiN nanofluids. The absorption performance of the hybrid nanofluids was further enhanced. The highest efficiency of the hybrid MWCNT-TiN nanofluids was achieved at the TiN mass fraction of 10 ppm, which was about 6.9%, 6.0%, and 3.8% higher than that of the MWCNT nanofluid at 2000, 4000, and 6000 seconds due to the localized surface plasmon resonance (LSPR) effect of TiN nanoparticles. It was also found that the collector efficiency dropped rapidly with the prolonged irradiation time owing to the convection and radiation heat loss at the elevated temperature. Therefore, effective measures should also be taken to reduce heat loss to maintain high photo-thermal conversion efficiency.
研究领域:
太阳能
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纳米技术
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材料科学
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可再生能源
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Mingtai Hou,Zeyi Jiang,Fuqiang Chu,Xinru Zhang,Nien-Chu Lai
Organic phase change materials (PCMs) promise remarkable latent heat storage capacity but suffer from weak visible-light absorption capability and ultralow thermal conductivity for harvesting and conversion of clean solar energy. Herein, we design and synthesize a new core@shell structured n-eicosane@TiO 2 /TiN composite microcapsules which can realize 98.08 % of thermal energy storage capacity. By making use of the localized surface plasmon resonance of high-thermal-conductivity TiN , the prepared composite microcapsules possess a remarkable photo-thermal conversion efficiency up to 78.4 %. Plasmonics TiN can not only efficiently adsorb visible light and convert the optical energy into heat but also enhance thermal conductivity of the composite microcapsules, resulting in ultra-low supercooling degree of 1.02 o C. In addition, the composite microcapsules exhibit excellent phase change reversibility and thermal durability during the 100-cyclic scans. Our work offers new insights into designing high-performance microcapsuled PCMs in solar thermal applications, bringing great potential for renewable energy utilization beyond traditional fossil energy sources.
研究领域:
材料科学
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太阳能
·
相变材料
·
纳米技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Yefeng Feng,Kaidan Wu,Huafeng Dong,Deping Xiong,Miao He
The composite of TiN/SnO 2 @C nanosheets has been synthesized via ball milling . In the sheet-like structure, the TiN/SnO 2 nanoparticles were evenly anchored in the graphite nanosheets . The TiN nanoparticles can not only increase the electron conductivity, but also stabilize the structure in Li + insertion/extraction. Besides, the sheet-like graphite can accommodate the volumetric expansion during cycling. Consequently, high specific capacity (837.0 mAhg −1 after 100 cycles at 0.2 Ag −1 ), remarkable rate property (466.8 mAhg −1 at 5.0 Ag −1 ) and long-life cycling performance for the TiN/SnO 2 @C nanosheets can be achieved in electrochemical performance measurement. The composite of TiN/SnO 2 @C nanosheets will become promising anode material for lithium ion batteries in the next generation.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
Journal of Applied Spectroscopy
·
2024
·Vol. 91
·期 4
·903-911
·
IF 0.8
Zheng Zhiheng,Zhang Fan,Liu Yankun,Wang Zhiwu,Pei Yuan,Wu Zhengang,Li Bo,Wei Yingna,Chen Ying,Wei Hengyong,Li Jingwu
TiN–Ag@Ag composite substrates were prepared via ammonia reduction nitridation followed by electrochemical deposition. Fabricated TiN–Ag@Ag substrates were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and ultraviolet-visible spectrophotometry. The surface-enhanced Raman spectroscopy activity of these substrates was evaluated using ibuprofen as the probe molecule. The size of the Ag particles prepared via electrochemical deposition was approximately 1 μm, and Ag nanoparticles with an average particle size of 100 nm were uniformly distributed on the surface of TiN–Ag films. The Raman signal of ibuprofen was significantly enhanced, and the minimum detection concentration of ibuprofen was 10 –5 M. The mechanism by which the TiN–Ag@Ag composite substrate enhanced the Raman signals was analyzed using ultraviolet photoelectron spectroscopy and density functional theory implemented in the Gaussian software. Overall, charge transfer and the local electromagnetic field effect enhanced the Raman signals of ibuprofen.
研究领域:
材料科学
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分析化学
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纳米技术
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药物分析
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产品关联
DOI
高影响因子
Environmental Technology & Innovation
·
2022
·
IF 7.758
Yufeng Guo,Jianfa Jing,Feng Chen,Shuai Wang,Lingzhi Yang
There is 3% ∼ 5% tin remaining in the Inner Mongolia tin-bearing middling obtained by flotation, which is a valuable secondary resource of tin. To effectively recover this tin, selective separation tin from tin-bearing middling by sulfide roasting using anhydrous gypsum (CaSO 4 ) as the sulfur agent was proposed in this study. The removal behaviors of tin during sulfur roasting were systematically investigated, including thermodynamic analysis, the effects of anhydrous gypsum, sulfur roasting temperature and time on the tin removal efficiency, and the mechanism model of separation of tin from tin-bearing middling during sulfide roasting. The results indicated that the cassiterite (SnO 2 ) was first transformed to Sn and then transformed to tin sulfide (SnS). Anhydrous gypsum could be recycled by exhausts absorption process in this work, which saved the sulfur agent for the whole separation process. In addition, arsenic was fixated in the residuals, which was beneficial for the separation of tin from tin-bearing middling. The removal efficiency of tin was 91.27% after sulfur roasting with 12.5 wt% CaSO 4 and 17.5 vol.% CO at 950 °C for 1 h.
研究领域:
冶金学
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材料科学
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产品关联
DOI
高影响因子
Nature Communications
·
2026
·Vol. 17
·期 1
·360
·
IF 15.7
Yuan Haobo,Zhang Wenxiao,Wang Feng,Xu Jianhong,Hu Yuyang,Guo Xuemin,Li Yunfei,Feng Bo,Cui Zhengbo,Li Wen,Fu Sheng,Li Xiaodong,Gao Feng,Fang Junfeng
The photo-thermal stability of tin-lead perovskite solar cells remains a major challenge. SnF 2 is commonly used to inhibit Sn 2+ oxidation and reduce hole density, however, the stability of devices remains poor. Here, we found that the poor stability partially results from an adverse effect of SnF 2 , which reacts with formamidine iodide during photo-thermal treatments. This reaction leads to degradation of perovskite and release of hydrofluoric acid, which corrodes electrodes. To address this issue, we develop a strategy that combines lead powder in precursor with PbF 2 post-treatment, replacing the role of SnF 2 as in film formation and surface defect passivation, respectively. The d-electron polarization in Pb 2+ strengthens its bond with F ⁻ , making it react inert to perovskite. In this work, the efficiency of SnF 2 -free devices increases from 16.43% to 24.07%. The cells retain 60% of their initial efficiency after 550 hours operating at 85 °C under maximum power point.
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Fang Jiao,Kun Qiao,Yao Jiang,Shuying Li,Jinghao Zhao,Wenjun Gui
As a widely used organotin acaricide nowadays, azocyclotin (ACT) could induce thyroidal endocrine disruption in fishes and amphibians, but its dominant disrupting mode remains unknown. In this study, zebrafish were firstly exposed to ACT (0.18–0.36 ng/mL) from 2 hpf (hours post fertilization) to 30 dpf (days post fertilization), and a series of developmental toxicological endpoints and thyroid hormones were measured. Result showed that no developmental toxicity to zebrafish was found in 0.18 and 0.24 ng/mL groups except decreased body weight (30 dpf, 0.24 ng/mL). However, exposed to 0.36 ng/mL ACT led to reductions in heartbeat (48 hpf), hatching rate (72 hpf) and bodyweight (30 dpf). General tendencies of decreases in free T3 but increases in free T4 and reductions in ratio of free T3/T4 were also found, inferring that type II deiodinase (Dio2) was repressed. This inference was confirmed by Western analysis that Dio2 expression reduced by 42.7% after 0.36 ng/mL ACT treatment. Moreover, RNA-Seq analysis implied that exposed to 0.36 ng/mL ACT altered the genome-wide gene expression profiles of zebrafish. Totally 5660 genes (involving 3154 down-regulated and 2596 up-regulated genes) were differentially expressed, and 13 deferentially expressed genes including down-regulated dio2 were significantly enriched in thyroid hormone signaling pathway. Subsequently, an in vitro thyroid receptor-reporter gene assay using GH3 cells was performed to further explore the potential disrupting mechanism. Result showed that luciferase activity slightly increased after exposure to ACT alone or ACT combined with low level T3, but was suppressed when combined with high level T3. It indicted there probably existed a competitive relationship in some extent between ACT and T3 in vivo . Overall, the present study provided preliminary evidences that long-term exposure to trace ACT repressed Dio2 expression, declined T3 and then activated thyroid receptor-mediated signaling, thereby leading to integrated thyroid endocrine disruption in zebrafish larvae.
研究领域:
环境科学
·
毒理学
·
分子生物学
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DOI
PubMed
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Xinbo Liu,Youbing Li,Haoming Ding,Lu Chen,Shiyu Du,Zhifang Chai,Qing Huang
MAX phases and its derived two-dimensional MXenes have attracted considerable interest because of their rich structural chemistry and multifunctional applications. Lewis acid molten salt route provides an opportunity for structure design and performance manipulation of new MAX phases and MXenes, Although a series of new MAX phases and MXenes were successfully prepared via Lewis acid melt route in recent years, few work is explored on nitride MAX phases and MXenes. Herein, a new copper-based 413-type Ti 4 CuN 3 MAX phase was synthesized through isomorphous replacement reaction using Ti 4 AlN 3 MAX phase precursor in molten CuCl 2 . In addition, it was found that at high temperature Ti 4 N 3 Cl x MXene will transform into two-dimensional cubic TiN α nanosheets with improved structural stability.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yang Yang,Yan Xiang,Yuewen Yang,Xian Xie,Faheem Mushtaq,Ruiqin Zhang,Walid A. Daoud
Among multivalent redox flow batteries, the Zn-based redox flow battery (RFB) has the advantages of high energy density, nontoxicity, and low cost. However, the severe dendrite issue hinders its deployment. Therefore, the Sn-based RFB is reported as a prospective alternative, particularly in alkaline systems, due to its lower redox potential and four electrons transfer in redox reactions. However, the continuous growth of Sn during charge forms large Sn bulk, which increases the risk of “dead Sn” formation. By combining experiments and theoretical calculations, urea is proposed as an electrolyte additive to regulate Sn deposition on graphite felt. This is achieved through the enhanced adsorption and robust reaction of Sn(OH) 6 2− with graphite felt. Consequently, a more uniform morphology ensues, reducing “dead Sn” formation and thus improving the average discharge voltage and areal capacity. Moreover, the Columbic efficiency becomes more stable, extending the cycle life to over 420 h (>200 cycles) without deep discharge during cycling. This study demonstrates the role of urea in achieving high-performance Sn-I flow battery with long cycle life, paving the way for further development of metal-based hybrid RFBs.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 32
·2301125
·
IF 29.4
Lishuai Huang,Hongsen Cui,Wenjun Zhang,Dexin Pu,Guojun Zeng,Yongjie Liu,Shun Zhou,Chen Wang,Jin Zhou,Cheng Wang,Hongling Guan,Weicheng Shen,Guang Li,Ti Wang,Wenwen Zheng,Guojia Fang,Weijun Ke
Narrow-bandgap (NBG) mixed tin/lead-based (Sn-Pb) perovskite solar cells (PSCs) have attracted extensive attention for use in tandem solar cells. However, they are still plagued by serious carrier recombination due to inferior film properties resulting from the alloying of Sn with Pb elements, which leads to p-type self-doping behaviors. This work reports an effective tin oxide (SnO x ) doping strategy to produce high-quality Sn-Pb perovskite films for utilization in efficient single-junction and tandem PSCs. SnO x can be naturally oxidized from tin diiodide raw powders and successfully incorporated into Sn-Pb perovskite films. Consequently, Sn-Pb perovskite films doped with SnO x exhibit dramatically improved morphology, crystallization, absorption, and more interestingly, upward-shifted Fermi levels. The resulting narrow-bandgap Sn-Pb PSCs with natural SnO x doping have considerably reduced carrier recombination, therefore delivering a maximum power conversion efficiency (PCE) of 22.16% for single-junction cells and a remarkable PCE of 26.01% (with a steady-state efficiency of 25.33%) for two-terminal all-perovskite tandem cells. This work introduces a facile doping strategy for the manufacture of efficient single-junction narrow-bandgap PSCs and their tandem solar cells.
研究领域:
材料科学
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光伏技术
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能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hao Jiang,Lizhang Wang,Bai Gao,Yiran Li,Yadan Guo,Mengning Zhuo,Kaixuan Sun,Binyu Lu,Meiyu Jia,Xiaoxia Yu,Huidong Wang,Yongge Li
In order to achieve high energy-conversion efficiency during CO 2 electro-conversion, OH − oxidation was employed as a counter reaction vs . CO 2 electroreduction for formate production on a Tin cathode. The formate faradic efficiency (FE) and production rate were 80.54% and 0.1549 mmol h −1 cm −2 using KOH anolyte at −1.80 V vs . SCE in 8 h operation, which were about 13.71% and 53.03% higher than that for KHSO 4 anolyte, respectively. This is mainly due to alkaline anolyte is beneficial to stabilize the catholyte pH, thus avoiding the competitive hydrogen evolution reaction, while maintaining fast electron transfer rate for the formation of CO 2* − . Moreover, KOH anolyte achieved the lowest power consumption (4.81 kWh kg −1 formate) compared with KHCO 3 and KHSO 4 . Polarization and electrochemical impedance spectroscopy measurements indicated that such energy-saving performance enhancement originated from low equilibrium potential and fast oxidation kinetics associated with the conversion of OH − to H 2 O, which reduced the anode potential and cell voltage. This study puts forward another insight for cost-effective CO 2 reduction, which is of great value to improve the balance of energy input and output during CO 2 conversion, thus having implication in enriching strategy in the field of electroreduction.
研究领域:
化学工程
·
环境科学
·
电化学
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 25
·期 2
·596-605
·
IF 11.034
Haitao Yu,Yimin Xuan,Qibin Zhu,Sheng Chang
It is extraordinarily exigent to solve the efficiency of 6H+/6e− photoreduction of CO2 and H2O into methanol as the major product, which is limited by the severe photogenerated carrier recombination, the reoxidation of methanol at high temperature, and photocorrosion of catalysts. Herein, we developed an elaborate gas–liquid–solid system assembled by using a novel multicomponent SrTiO3 (La Cr)/Cu@Ni/SiO2/TiN (STO/Cu@Ni/SiO2/TiN) heterojunction, realizing a highly efficient and robust photocatalytic CO2 reduction to methanol at low temperature. STO/Cu@Ni/SiO2/TiN exhibits excellent light absorption and high charge carriers separation nature, and the evolution of methanol is 25.8 μmol (h gcat.)−1 roughly not only 173 folds higher than those observed compared with the STO counterpart, but also is 50 times that those of traditional gas–solid two-phase system. Of note, these improved performances are attributed to the enhancement of the local surface plasmonic resonance of Cu@Ni nanoparticles by changing the local medium dielectric constant and prolonged carrier's lifetime originating from heterostructure. Moreover, plasmonic TiN nanoparticles play an important role in remaining the triphase interfacial system temperature at 90 °C and increasing methanol production excellently. While, the ionic liquid in the gas–liquid–solid system can activate CO2 molecules, thereby greatly improves the yield of methanol. In situ Fourier transform infrared (FTIR) spectra and 13C isotope labeling tests reveal the reaction path of CO2 on the photocatalyst surface. This work may provide a new direction for the efficient photoreduction of CO2 to methanol.
研究领域:
化学
·
材料科学
·
环境科学
·
催化
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）