JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qijing Guo,Hao Yi,Feifei Jia,Shaoxian Song
Phase change materials (PCMs) offer significant advantages in energy conversion and storage by facilitating the storage and release of thermal energy during phase transition processes. However, challenges such as leakage during PCM phase transitions and poor light absorption properties have constrained their application in the field of photothermal energy storage. In this study, Montmorillonite (Mt) and molybdenum disulfide (MoS 2 ) has been used to design and synthesize hybrid aerogels (MoS 2 /Mt) boasting high mechanical strength and excellent photothermal conversion performance. These aerogels are then used to encapsulate polyethylene glycol (PEG) to prepare composite PCMs with outstanding solar-thermal conversion and storage performances. The results show that the synthesized MoS 2 /Mt-PEG composite PCMs exhibit high enthalpies of melting and solidification of 169.16 J/g and 170.78 J/g, respectively, while the aerogel supporting material has a high compressive modulus of 1.96 MPa. Moreover, the composite material displayed excellent thermal stability and leakage resistance after undergoing 30 melting-cooling cycles. Furthermore, the incorporation of MoS 2 imparted outstanding light absorption properties to the MoS 2 /Mt-PEG composite, resulting in a high light absorption and photothermal conversion-storage efficiency of 93.4 % and 96.47 %, respectively. Synthesized composite PCMs also demonstrate outstanding performance in solar-thermal-electricity conversion, achieving a voltage output of 458 mV under illumination conditions and maintaining a sustainable voltage output even after removing the light source. Thus, the composite PCMs prepared in this work can meet the requirements of high enthalpy, effective leakage prevention, efficient solar-thermal conversion and solar-thermal-electricity conversion performance, thereby presenting potential applications in practical solar energy collection, conversion, and storage.
研究领域:
材料科学
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能源化学
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纳米复合材料
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热能存储
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光热转换
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Li Fang,Liang Li,Zan Qu,Haomiao Xu,Jianfang Xu,Naiqiang Yan
A novel method was developed and applied for the treatment of simulated wastewater containing multiple heavy metals. A sorbent of ZnS nanocrystals (NCs) was synthesized and showed extraordinary performance for the removal of Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ . The removal efficiencies of Hg 2+ , Cu 2+ , Pb 2+ and Cd 2+ were 99.9%, 99.9%, 90.8% and 66.3%, respectively. Meanwhile, it was determined that solubility product ( K sp ) of heavy metal sulfides was closely related to adsorption selectivity of various heavy metals on the sorbent. The removal efficiency of Hg 2+ was higher than that of Cd 2+ , while the K sp of HgS was lower than that of CdS. It indicated that preferential adsorption of heavy metals occurred when the K sp of the heavy metal sulfide was lower. In addition, the differences in the K sp of heavy metal sulfides allowed for the exchange of heavy metals, indicating the potential application for the sequential removal and separation of heavy metals from wastewater. According to the cumulative adsorption experimental results, multiple heavy metals were sequentially adsorbed and separated from the simulated wastewater in the order of the K sp of their sulfides. This method holds the promise of sequentially removing and separating multiple heavy metals from wastewater.
研究领域:
环境科学
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环境工程
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纳米材料
·
水污染控制
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Hui Chen,Jinfeng Wang,Chenchen Jia,Junpeng Mou,Lei Zhu
For the purpose of increasing the power conversion efficiency (PCE) meanwhile decreasing the cost of dye-sensitized solar cell (DSSC), Cu 2 ZnSnS 4 - multiwall carbon nanotubes (CZTS-MWCNTs) nanohybrid Pt-free counter electrode (CE) was prepared via a facile fabricating route. In brief, CZTS nanoparticles were synthesized by a solvothermal method and the composite film was fabricated by spin coating the aqueous solution of the composite. The short-circuit current density and PCE of the DSSC with CZTS-MWCNTs CE were found to be 16.62 mA cm −2 and 9.04%, respectively. But the corresponding values were 15.42 mA cm −2 and 8.74% for a DSSC with a pure Pt-CE. This is owing to the synergistic effect of the intrinsic superior electrocatalytic activity of the CZTS nanoparticles and highly specific surface area and high electrical conductivity of the MWCNTs . The presence and distribution of CZTS-MWCNTs on the CE were characterized by X-Ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM), respectively. Cyclic voltammetry (CV) and electrochemical impedance spectra (EIS) were examined for confirming the high electrocatalytic efficiency of this nanohybrid system.
研究领域:
材料科学
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能源化学
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纳米技术
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电化学
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光伏器件
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Yajie Qian,Xuefei Zhou,Yalei Zhang,Peizhe Sun,Weixian Zhang,Jiabin Chen,Xin Guo,Xiao Zhang
Calcium peroxide (CP) combined persulfate (PS) oxidation is an emerging in situ chemical oxidation (ISCO) technology for ground water remediation. Many field cases also confirm its effectiveness in ground water remediation while few research articles document it. This study investigated the performance of α-methylnaphthalene (MN) degradation by PS/CP to further understand this dual oxidant application in ISCO. Results showed that MN could be completely oxidized in 72 h with 1 g L −1 PS and 1 g L −1 CP. The degradation rates of MN increased with the increase of PS and CP concentration. MN degradation was significantly enhanced with the solution pH decrease, because CP was easier to dissolve and generated more radicals in acidic condition. Solutes in ground water including chloride ions, alkalinity and natural organic matters presented inhibitory effect on MN degradation in this dual oxidant system. Plausible mechanisms of the sulfate and hydroxyl radicals in the system were proposed based on the results of radical scavenging experiments and electron spin resonance (ESR) tests. It appeared that surface OH of CP was also responsible for the MN removal. The major oxidation products in this study were 1-naphthaldehdye, naphthalene-1-ylmethanol and 4-hydroxy-4-methylnaphthalen-1(4H)-one. To better understand PS/CP in ISCO, the degradation of MN was tested in ground water matrix, which showed satisfactory efficiency. The results of this study provided some detail information of PS/CP dual oxidant in degradation organic contaminants, which might provide some references for the application of this technology in ISCO.
研究领域:
环境工程
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环境化学
·
污染控制
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土壤与地下水修复
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高级氧化技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2013
·Vol. 3
·期 45
·23133-23138
·
IF 2.562
Yang Wang,Yun Xiao,Hangyu Zhou,Wei Chen,Ruikang Tang
A novel versatile system combining chemotherapy and photothermal therapy for cancer cells using CuS NCs is reported. CuS NCs were synthesized by a solid–liquid reaction between Cu2O nanocubes and thiourea. While the hollow nanocage can be used to load anticancer drugs for chemotherapy, the CuS can convert NIR light into heat for photothermal therapy. More importantly, CuS NCs display exceptionally high drug loading capacity of DOX with 500 wt% and release of DOX is pH-controllable, which is a spontaneous process under intracellular conditions. Compared with chemotherapy or photothermal therapy alone, the combination of chemotherapy and phototherapy can significantly improve the therapeutic efficacy. This improvement strategy using multifunctional nanomaterials may be particularly useful in biomedical applications.
研究领域:
肿瘤学
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纳米医学
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药物递送
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转化医学
·
生物材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 13
·46036
·
IF 1.86
Yanfang Hu,Weiqian Ma,Meilin Tao,Xueyan Zhang,Xiaohong Wang,Xiaoyu Wang,Li Chen
Herein, we present a strategy for supporting bromine as a catalyst for the oxidation of sulfides. In this strategy, branched poly(ethylene imine) was first decorated by magnetic oxide and then used to support liquid bromine to obtain solid polymeric bromine (M@PEI@Br) nanoparticles. Compared with free bromine, the stability of the M@PEI@Br nanoparticles improved obviously. The oxidation of thioanisole to methyl phenyl sulfoxide was chosen as a reaction model to evaluate the catalytic activity of the M@PEI@Br nanoparticles. All of the obtained results verify that the M@PEI@Br nanoparticles exhibited excellent catalytic efficiency and could accelerate the oxidation process under solvent-free conditions at room temperature; this highlighted the potential of decorated polymers to support active and unstable small-molecule organic catalysts. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46036.
研究领域:
催化化学
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高分子材料
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纳米科技
·
有机合成
·
绿色化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 18
·6848-6855
·
IF 3.069
Xiaoting Huang,Haiyang Liu,Jiewen Zhang,Boren Xiao,Fengxu Wu,Yueying Zhang,Ying Tan,Yuyang Jiang
A dicyanoisophorone-based near-infrared fluorescent probe (NIR-NP) was successfully designed for hydrogen sulfide (H2S) detection. 7-Nitro-1,2,3-benzoxadiazole (NBD) amine, an electron-withdrawing group, was applied to quench the fluorescence of dicyanoisophorone-based fluorescent dyes and could be removed by H2S-specific thiolysis of an NBD amine bond, leading to a significant fluorescence turn-on response. The probe could quantitatively detect H2S with a lower detection limit (0.03 μM) in vitro and in living cells. The probe with a large Stokes shift (186 nm) showed a high selectivity to H2S in the presence of other biothiols, including glutathione, homocysteine, and cysteine. Moreover, the probe was successfully applied to image endogenous H2S in different tumor cells and in liver tissues. The excellent properties of the probe and its applications in cell and tissue imaging indicated its potential for further exploration and application of H2S in the pathophysiology of cancers and even in the diagnosis of H2S-related diseases.
研究领域:
分子影像学
·
肿瘤学
·
化学生物学
·
分子生物学
·
生物分析化学
·
转化医学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 21
·19077-19086
·
IF 2.195
Liu Peng,Sui Yanwei,Wei Fuxiang,Qi Jiqiu,Meng Qingkun,Ren Yaojian,He Yezeng
A facile one-step hydrothermal route has been developed to directly synthesize CoNi 2 S 4 nanoparticles on carbon fiber cloth (CC) to study the synergistic effect of bimetallic sulfides and carbon substrate on the electrochemical performance of supercapacitor electrode. The integrated binder-free CoNi 2 S 4 /CC electrode possesses an outstanding specific capacitance of 1165 F g −1 at 1 A g −1 , and excellent rate capacitance (75.3% retention at 10 A g −1 ) in a three-electrode system, which is 27.2% and 32.2% higher than that of pure CoNi 2 S 4 electrode. Detailed electrochemical tests and results showed that the surface capacitance effect ratio of the CoNi 2 S 4 /CC electrode is higher than that of pure CoNi 2 S 4 electrode because of the introduction of CC. The CC substrates can provide a channel for electrolyte electrons and ions to promote reaction kinetics and shorten the diffusion distance of the redox reaction, thereby improving the performance of the pseudocapacitor CoNi 2 S 4 . Besides, the assembled asymmetric supercapacitors based on CoNi 2 S 4 /CC electrode and reduced graphene oxide electrode displayed a high specific energy density of 33.2 Wh kg −1 at 800 W kg −1 , remarkable electrochemical stability (87.1% retention after 10,000 circulations) and high rate stability.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Xindong Wang,Yiying Yang,Jing Dong,Feng Bei,Shiyun Ai
A novel and sensitive colorimetric sensor for determination of methyl parathion (MP) was developed based on a lanthanum (La 3+ ) functionalized gold nanoparticles (Au NPs-La) probe. In this assay, a new type of crosslinking molecule-La 3+ , possessing strong coordination effect on oxygen-containing functional groups, was first applied in the Au NPs-based colorimetric assay. On account of the oxygen-containing thiophosphate, MP could combine with La 3+ and induce the aggregation of Au NPs-La probes through coordination–bonding interactions, resulting in a variation of the solution color from red to blue. Further, the color change was in situ monitored with ultraviolet visible (UV–vis) spectrophotometer for the quantitative detection of MP. In contrast with the commonly designed Au NPs-based colorimetric assays, a novel Au NPs-La probe, which equipped with the same type of binding sites with Au NPs and analyte molecules, was explored and used for optical detection of MP. Under optimized conditions, the colorimetric assay exhibited a linear correlation to the concentration of MP in the range from 0.5 nM to 0.5 μM with a detection limit of 0.1 nM (S/N = 3). The developed sensor is simple, without using complicated instruments, and has enormous potential applications in rapid and on-site monitoring for MP in real samples.
研究领域:
分析化学
·
纳米生物技术
·
环境监测
·
食品安全
·
分子识别
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Erbing Hua,Shu Jin,Xiaorong Wang,Shuang Ni,Gang Liu,Xiaoxiang Xu
In this work, novel 2D type-II p-n heterojunctions La 2 Ti 2 O 7 /In 2 S 3 have been fabricated. The heterojunctions exhibit much improved photocatalytic activity over individual moieties and their physical mixtures in which 18-fold increment in hydrogen production has been achieved under visible light illumination (λ ≥ 400 nm). Their superior activities stem from intimate face-to-face contact between La 2 Ti 2 O 7 and In 2 S 3 in the heterojunctions which guarantee facile charge interchange. Photoelectrochemical analysis suggests that efficient charge separations occur at the interfaces of the heterojunctions and contributes to a prolonged charge lifetime as well as the much enhanced photocatalytic activities. Such a simple strategy by fabricating ultrathin type-II p-n heterojunctions also warrant promising applications in other areas such as optoelectronics, sensors etc. whereby efficient charge separations are needed.
研究领域:
材料化学
·
光催化
·
纳米材料
·
能源科学
·
半导体物理
·
环境催化
·
可持续能源
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Qin Yang,Chunjuan Fang,Na Zhao,Ying Jiang,Bing Xu,Shouning Chai,Yuanzhen Zhou
We synthesized a novel CdS/Cucurbit[n]urils (CB[n], n = 5–10) composites by a simple one-step process. The CdS/CB[5] photo-catalyst exhibits excellent performance. In this context, CdS/CB[5] were studied by different chemical characterization techniques including fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) techniques. FT-IR and XPS indicate that the caged carbonyl port of CB[5] achieves substantial separation of CdS electron-holes. Furthermore, the concentration of hydroxyl radicals was monitored by fluorescence spectroscopy , which confirmed that the Cucurbit[n]urils can effectively enhance the photocatalytic reaction. We have checked the regeneration efficiency of CdS/CB[5], which was still at its higher value even after four cycles of recycling testing. Moreover, a reliable photocatalytic mechanism supported by fluorescent probe for degrading MB aqueous solution in the CdS/CB[5] composite was also described. We anticipate that the study of the mechanism of temporary interaction with holes can have a great impact on photo-catalysis theory.
研究领域:
材料化学
·
光催化
·
纳米材料
·
环境化学
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Jinglian Zhu,Xu Zhang,Haiguang Gao,Yuting Shao,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li
Rechargeable magnesium batteries (rMBs) are promising techniques suitable for large-scale energy storage systems with low-cost and high safety. However, their development is severely hindered by strong coulombic effect between bivalent Mg 2+ and cathode materials . In this work, two dimensional hierarchical nano-micro hybrids are synthesized by in-situ generating VS 4 nanosheets on carbon-coated Ti 3 C 2 MXene matrix (denoted as VS 4 @Ti 3 C 2 /C). A high-performance rMB system is built by using the hierarchical nano-micro hybrids cathode, magnesium foil anode, and 0.25 M methylpyrrolidinium chloride in 0.25 M 2PhMgCl-AlCl 3 /tetrahydrofuran as the electrolyte. The existence of V–C bond proves that VS 4 is anchored on the surface of Ti 3 C 2 via a strong chemical bond, rather than simply by adsorption. The unique hierarchical nano-micro structure improves the accessibility of the electrolyte and reduces the charge transfer resistance, leading to a high discharge capacity of 492 mA h g −1 at 50 mA g −1 , an outstanding rate performance of 129 mA h g −1 at 1000 mA g −1 , and excellent cycling performance (over 900 cycles at 500 mA g −1 ). Moreover, reversible intercalation of MgCl + into VS 4 @Ti 3 C 2 /C is revealed by investigating the evolution of the hybrids during different electrochemical states. This study will shed light on designing high-performance MXene-based cathode materials for multivalent batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
多价离子电池
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）