INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Can Wu,Xiaodong Wang,Junying Zhang,Jue Cheng,Ling Shi
A novel type of microencapsulated ammonium polyphosphate (MAPP) with a triallyl cyanurate (TAC)/SiO2 double-layered shell was synthesized through in-situ polymerization, followed by the thiol–ene photograted reaction. With a double bond in the TAC outer shell, MAPP could be utilized as a highly efficient flame retardant for intumescent flame-retarded natural rubber (NR). The chemical structure, morphology, and performance of MAPP were characterized by X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, water contact angle (WCA), scanning electron microscopy, and thermogravimetric analysis. MAPP exhibited a hydrophobic feature with a WCA of 101° because of its organic outer shell, which made MAPP well dispersed in the NR matrix as well as enhanced the compatibility between the MAPP and NR matrix. The resulting intumescent flame-retardant NR compounds not only achieved excellent flame-retardant performance but also obtain improved mechanical properties because of the presence of 3D-cross-linking networks between the MAPP and NR matrix. The NR/MAPP compounds also presented good water resistance because of the microencapsulation of APP with an SiO2 inner shell, which provided a waterproof barrier for APP. Based on the cone calorimetric results, the NR/MAPP compounds also presented a decline in total heat release and heat release rate but an improvement in ignition time due to the fact that both the SiO2 inner layer and TAC outer shell could enhance the formation of a high-strength thermally stable char layer during combustion, thus preventing heat transmission and diffusion. The significant enhancement in flame-retardant performance was principally ascribed to the synergistic char-forming effect derived from the APP core and TAC/SiO2 shell. This work provides a new idea for development of APP-based flame-retardant additives and also explores their potential applications in intumescent flame-retardant polymeric systems.
研究领域:
高分子材料科学
·
阻燃化学
·
功能材料
·
纳米复合材料
·
表面工程
·
热稳定性分析
·
聚合物改性
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yongkun Liu,Qiuling Lu,Zheng Huang,Shiqing Sun,Bo Yu,Uwamahoro Evariste,Guohua Jiang,Juming Yao
In this work, a novel flexible electrode material for supercapacitor is prepared by electrodeposition of Ni-Co-S interconnected nanosheet arrays on N-doped hierarchical porous carbon nanofibers (Ni-Co-S@N-pCNFs). The electrode exhibits a remarkable specific capacitance of 520.2 F g -1 at the current density of 0.2 A g −1 and 670 F g -1 at 2 mV s −1 . The activated charcoal (AC) loaded N-doped porous carbon nanofibers (AC@N-pCNFs) as electrode is also prepared which exhibits a specific capacitance of 257.2 F g -1 at 0.2 A g −1 , as well as excellent cycling stability with a capacitance retention of 92.6% after 5000 cycles. Furthermore, the Ni-Co-S@N-pCNFs as the positive electrode , active carbon loaded N-doped hierarchical porous carbon nanofibers (AC@N-pCNFs) as negative electrode , and KOH/NKK hybrids as both the electrolyte and separator are assembled into flexible asymmetric supercapacitor . The assembled supercapacitor device without using any current collectors or binders shows a high energy density of 21.6 Wh·kg −1 at a power density of 134.9 W kg −1 and robust long-term cycling stability retaining over 90.0% after 3000 cycles at 1.0 A g −1 . The as-assembled asymmetric supercapacitors (ASCs) have an outstanding mechanical flexibility and electrochemical stability and no significant attenuation occurred during cycling under different bending states.
研究领域:
材料科学
·
电化学
·
纳米能源
·
储能器件
·
功能材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yunfeng Wang,Yingang Gui,Shasha He,Jiacheng Yang
The application of conventional sensors is limited due to energy supply issues and environmental problems, and current triboelectric nanogenerator (TENG) based self-powered sensing systems is hard to meet the specific requirement. In this paper, TiO 2 /Ni/C composites were prepared using MOF-derived Ni/C materials for SO 2 F 2 detection at room temperature. The excellent pore structure and high electrical conductivity of Ni/C material greatly improve the sensitivity properties of TiO 2 . The TiO 2 /Ni/C composites-based SO 2 F 2 sensor exhibits a wide detection range of 5–200 ppm concentration and a fast response/recovery time of 26 s/9 s, while its response value for 200 ppm SO 2 F 2 is 18.34 times higher than that of the pure TiO 2 -based sensor. Furthermore, by modifying the PVDF film with TiO 2 , the permittivity of PVDF is greatly improved, and the surface potential is 2.6 times higher than that of pure PVDF film. Eventually, a dual-layer hybrid TENG based on TiO 2 /PVDF composite film was constructed. Its upper TENG powers the TiO 2 /Ni/C composite sensor, and the lower hybrid TENG drives the thermohygrometer to realize a self-powered temperature and humidity-corrected SO 2 F 2 sensing system, which can accurately implement SO 2 F 2 gas concentration alarms at 10 ppm, 50 ppm, and 100 ppm at different humidity levels. This work broadens the application of TENG in the field of self-powered gas sensing while providing a new idea to achieve the trace detection of SO 2 F 2 at room temperature.
研究领域:
材料科学
·
纳米技术
·
传感器学
·
环境监测
·
能源材料
✓ 已验证
DOI
高影响因子
Matter
·
2020
·
IF 0
Shiqi Guo,Kaijin Wu,Chengpan Li,Hao Wang,Zheng Sun,Dawei Xi,Sheng Zhang,Weiping Ding,Mona E. Zaghloul,Changning Wang,Fernando A. Castro,Dong Yang,Yunlong Zhao
Smart contact lenses attract extensive interests due to their capability of directly monitoring physiological and ambient information. However, previous demonstrations usually lacked efficient sensor modalities, facile fabrication process, mechanical stability, or biocompatibility. Here, we demonstrate a flexible approach for fabrication of multifunctional smart contact lenses with an ultrathin MoS 2 transistors-based serpentine mesh sensor system. The integrated sensor systems contain a photodetector for receiving optical information, a glucose sensor for monitoring glucose level directly from tear fluid, and a temperature sensor for diagnosing potential corneal disease. Unlike traditional sensors and circuit chips sandwiched in the lens substrate, this serpentine mesh sensor system can be directly mounted onto the lenses and maintain direct contact with tears, delivering high detection sensitivity, while being mechanically robust and not interfering with either blinking or vision. Furthermore, the in vitro cytotoxicity tests reveal good biocompatibility, thus holding promise as next-generation soft electronics for healthcare and medical applications.
研究领域:
生物医学工程
·
柔性电子学
·
可穿戴医疗设备
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眼科诊断
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生理监测
·
纳米生物技术
·
转化医学
✓ 已验证
DOI
PubMed
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chen Zhang,Haohao Wu,Fangqin Cheng,Jianfeng Li
Nonradical advanced oxidation has a distinctive excellent selectivity and reactivity. The fine-tuned O/N basic functional groups play a distinguishing role in the occurrence of nonradical pathways. However, it remains debatable regarding the principal basic species and their contribution. Consequently, identification of preferred basic sites and the correlation with the triggered activation mechanism need to be further clarified. In this study, the hydrothermal and thermal annealing method were adopted to construct heterogeneous basic sites on three-dimensional graphene (3D GN), and the activity of peroxydisulfate (PDS) activation was systematically assessed by humic acid(HA)abatement. Herein, the significantly improved catalytic capability (up to 80 %) of 3D GN-NH 3 ⋅H 2 O was acquired, more than 2 times compared to that of 3D GN-NH 3 . The added I D/I G value of 3D GN-NH 3 ⋅H 2 O from 1.05 of 3D GN to 1.08 indicated that it is less graphitized and has more structural defects. Notably, the hydrothermal modification of NH 3 ⋅H 2 O enhanced both the basic oxygen and nitrogen groups (C = O/pyrrolic-N, pyridine-N). A positive correlation was displayed between the integrated basic sites ratio (34.2–71.7 %) and reaction rate (0.169–0.442 min −1 ) based on quantitative calculation. Moreover, the increased content of basic sites and defective sites on 3D GN-NH 3 ⋅H 2 O was responsible for the hydrophobic interaction and 1 O 2 generated in nonradical pathways. The most reactive basic site is the pyrrolic-N which was illustrated by density functional theory (DFT) calculations. Furthermore, a possibly involved nonradical activation mechanism of 3D GNs/PDS was explored. The challenges and prospects of PDS advanced oxidation activated by carbon catalyst are evaluated. This work provides insights into a facile protocol for engineering a carbon catalyst to drive efficient PDS activation in the remediation of water environmental pollutants.
研究领域:
环境化学
·
材料科学
·
催化化学
·
水污染治理
·
碳材料
·
高级氧化技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jiuli Chang,Shiqi Zang,Wenfang Liang,Dapeng Wu,Zhaoxun Lian,Fang Xu,Kai Jiang,Zhiyong Gao
The intrinsic faradic reactivity is the uppermost factor determining the charge storage capability of battery material, the construction of p-n junction composing of different faradic components is a rational tactics to enhance the faradic activity. Herein, a reduced graphene oxide@cobalt nickle sulfide@nickle cobalt layered double hydroxide composite (rGO@CoNi 2 S 4 @NiCo LDH) with p-n junction structure is designed by deposition of n -type nickle cobalt layered double hydroxide (NiCo LDH) around p-type reduced graphene oxide@cobalt nickle sulfide (rGO@CoNi 2 S 4 ), the charge redistribution across the p-n junction enables enhanced faradic activities of both components and further the overall charge storage capacity of the resultant rGO@CoNi 2 S 4 @NiCo LDH battery electrode. As expected, the rGO@CoNi 2 S 4 @NiCo LDH electrode can deliver high specific capacity ( C s , 1310 ± 26 C g −1 at 1 A g −1 ) and good cycleability (77% C s maintaining ratio undergoes 5000 charge-discharge cycles). Furthermore, the hybrid supercapacitor (HSC) based on the rGO@CoNi 2 S 4 @NiCo LDH p-n junction battery electrode exports high energy density ( E cell , 57.4 Wh kg −1 at 323 W kg −1 ) and good durability, showing the prospect of faradic p-n junction composite in battery typed energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
·
固态物理
·
界面化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Zhelu Hu,Kai Xia,Jing Zhang,Ziyang Hu,Yuejin Zhu
Highly transparent metal sulfides (Ni 3 S 4 , MoS 2 ) are directly deposited on fluorine doped tin oxide (FTO) substrates as effective Pt-free counter electrodes (CEs) for novel bifacial dye-sensitized solar cells (DSSCs). The blocky-like Ni 3 S 4 and petal-shaped MoS 2 nanoparticles (NPs) possess large surface area, which provides amount of active site to contact with electrolyte. The films not only show high transmittance at visible wavelengths, but also exhibit prominent electrocataltytic activity and outstanding metallic conductivity in iodine/iodide based bifacial DSSCs. Under front-side irradiation (100 mW/cm 2 ), the bifacial DSSC based on the transparent Ni 3 S 4 or MoS 2 CE presents remarkable photovoltaic conversion efficiency (E ff = 6.56%, 6.11%, respectively), closing to that of conventional Pt CE (E ff = 6.83%). Moreover, by appending an ordinary mirror as a photo reflector to achieve both-side illumination, the bifacial DSSC using the transparent Ni 3 S 4 or MoS 2 sample as CE obtained higher short-circuit current density (J sc ) and more attractive power conversion efficiency (PCE) (E ff = 7.06%, 6.65%, respectively). It indicates that the as-prepared transparent Ni 3 S 4 and MoS 2 CEs are promising potential candidates to explore low-cost and high-efficiency bifacial DSSCs.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
能源化学
·
半导体器件
✓ 已验证
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Lingli Xing,Kwadwo Asare Owusu,Xinyu Liu,Jiashen Meng,Kun Wang,Qinyou An,Liqiang Mai
As promising electrode materials for aluminum-ion batteries (AIBs), transition metal sulfides have attracted significant attention. However, the relative low energy density and poor rate property restrict their further applications. Herein, channels-rich VS 4 nanowire clusters were synthesized via an amine ions-assisted method. When assessed as a cathode for rechargeable AIB, the VS 4 nanowire clusters exhibit superior electrochemical performances , specifically, outstanding rate property (103.32 mAh g -1 at 800 mA g -1 ), good cycling stability and a high reversible capacity of 252.51 mAh g -1 (at 100 mA g -1 ). Moreover, ex-situ X-ray diffraction (XRD) and in-situ Raman techniques reveal that the as-prepared VS 4 nanowire clusters have stable channels-rich structures, which is favorable for the mass transfer in electrochemical reaction . A mechanism of intercalation is proposed for the electrochemical process . This work takes a step toward the development of high-performance electrode materials for AIBs and provides new insights into the chemistry of AIBs for electrochemical energy storage .
研究领域:
电化学
·
能源材料科学
·
纳米材料学
·
储能技术
·
无机化学
·
材料物理
·
应用化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wenda Zhou,Zhenzhen Jiang,Mingyue Chen,Zhaohui Li,Xingfang Luo,Manman Guo,Yong Yang,Ting Yu,Cailei Yuan,Shouguo Wang
Owing to tip effect can introduce localized enhanced electric field and reduce interfacial energy barrier, design of atomic tip structure in single-atom catalysts (SACs) may be a fascinating strategy to further improve its electrocatalytic activity. However, conventional synthesis methods, such as defect-trapping or substitution, only lead to the formation of planar geometry of SACs without tip atoms. Good conductive 1T-TMDs with electrocatalytically active basal plane can provide platform to directly stabilize single atoms (SAs) on the top sites of its surface to form atomic tip structure. Herein, a universal Laser-molecular beam epitaxy (L-MBE) method for precisely controlling non-noble metal SAs directly immobilizing on the Cr top site of 1T-CrS 2 metallic basal plane is developed. In case of Mo, the Mo SAs@1T-CrS 2 with single-atom tip structure can exhibit enhanced electric field surrounding Mo atoms and an almost zero hydrogen adsorption free energy, resulting in superior HER performance together with high stability. This work provides a general way to design varieties of SACs in widely catalytic application.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源材料
·
表面科学
✓ 已验证
DOI
高影响因子
ANALYST
·
2012
·Vol. 138
·期 4
·1219-1225
·
IF 4.23
Xindong Wang,Jing Dong,Huami Ming,Shiyun Ai
A novel strategy was proposed for preparing a highly sensitive glycoprotein sensor based on molecularly imprinted polymers (MIP), which was electropolymerized with o-phenylenediamine and 3-aminophenylboronic acid monohydrate in the presence of template molecules (bovine serum albumin (BSA)). Sensitivity improved dramatically owing to the application of a graphene–Au nanoparticles hybrid as the electrode modifier, and the immobilization of a large amount of 6-ferrocenylhexanethiol, as the electroactive species, onto nanoparticles. The quantification of BSA was realized by detecting the electrochemical oxidation signal of 6-ferrocenylhexanethiol, which was bonded onto the electrode. Under optimized conditions, a good relationship was obtained between the response current and logarithm of BSA concentration in the range of 1.0 × 10−11 to 1.0 × 10−5 g mL−1 with a detection limit of 7.5 × 10−12 g mL−1 (S/N = 3). The resulting MIP sensor displayed good selectivity, reproducibility and stability.
研究领域:
分析化学
·
生物传感器
·
纳米生物技术
·
分子识别
·
电化学传感
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
Beilei Yuan,Lianfeng Duan,Qiqian Gao,Xueyu Zhang,Xuesong Li,Yue Yang,Li Chen,Wei Lü
The electrochemical performance of counter electrodes (CEs) plays an important role for achieving high efficient quantum dot sensitized solar cells (QDSSCs). Considering the optical band gap energy of semiconductor materials and the V oc of the QDSSCs is determined by the energy difference between the quasi-Fermi levels ( q E f ) of the anode and cathode, so in this work, we synthesized the different metal sulfides and their composites including CuS/CoS, CuS/NiS, CuS, CoS and NiS by chemical bath deposition (CBD) method and used as CEs of QDSSCs. The effect of different CEs on performance of cells were investigated, and the best power conversion efficiency (η) of 5.22% was achieved by CuS/CoS CE, which is higher than that of CuS/NiS, CuS, CoS and NiS (η = 2.56%, 4.73%, 2.23% and 1.62%). The improved cell efficiency was attributed to the excellent electrical conductivity and catalytic activity of CuS and CoS, respectively. The result indicated t hat the combination of different metal sulfide composites could increase open-circuit voltage (V oc ) value without sacrificing the short-circuit current (J sc ), and leaving good perspectives for significantly higher solar cell performances.
研究领域:
材料科学
·
新能源技术
·
半导体物理
·
电化学
·
纳米材料
·
光电子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xiaoxue Li,Keyu Xie,Long Song,Mengjia Zhao,Zhipan Zhang
The effective separation of photogenerated electrons and holes in photocatalysts is a prerequisite for efficient photocatalytic water splitting. CuInS2 (CIS) is a widely used light absorber that works properly in photovoltaics but only shows limited performance in solar-driven hydrogen evolution due to its intrinsically severe charge recombination. Here, we prepare hierarchical graphitic C3N4-supported CuInS2 (denoted as GsC) by an in situ growth of CIS directly on exfoliated thin graphitic C3N4 nanosheets (g-C3N4 NS) and demonstrate efficient separation of photoinduced charge carriers in the GsC by forming the Z-scheme system for the first time in CIS-catalyzed water splitting. Under visible light illumination, the GsC features an enhanced hydrogen evolution rate up to 1290 μmol g–1 h–1, which is 3.3 and 6.1 times higher than that of g-C3N4 NS and bare-CIS, respectively, thus setting a new performance benchmark for CIS-based water-splitting photocatalysts.
研究领域:
材料化学
·
光催化
·
能源化学
·
纳米材料
·
可持续能源
·
半导体物理
·
表面科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）