ACS Applied Nano Materials
·
2021
·
IF 5.097
Mengdan Guan,Yameng Zhu,Xiaoping Yue,Yan Liang,Huixiang Sheng,Jin Wang,Chengyu Zhang,Qiming Peng,Gang Lu
The plasmon-mediated coupling reaction of nitroaromatic compounds is an effective strategy to synthesize the aromatic azo compounds that are widely applied in material science, pharmacy, and agricultural chemistry. Nonetheless, the reaction rate can be further improved since the lifetime of the plasmon-generated hot carriers is limited to femtoseconds or picoseconds. Herein, using in situ plasmon-enhanced Raman spectroscopy, we reveal that the adsorbed positively charged methyl violet molecules on the silver nanoparticle (Ag NP)–graphene oxide (GO) composite structure act as simple and cost-effective molecular cocatalysts, largely boosting the coupling of p-nitrothiophenol to p,p′-dimercaptoazobenzene. This boosting is attributed to the promoted separation of the plasmon-generated hot carriers at the Ag NP–GO interface. In addition, the reduction of laser power will help to promote the efficiency of the MV-induced acceleration. This work provides a highly simple, efficient, and cost-effective strategy to accelerate the coupling reaction of nitroaromatic compounds, and this strategy can be extended to the acceleration of many other plasmon-mediated chemical reactions.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2021
·Vol. 147
·期 15
·8145-8155
·
IF 4.626
Tao Lili,Xu Yue,Liu Lubin,Li Bin,Xu Miaojun
A novel mono-component P/N/B-containing intumescent flame retardant poly(methylphosphonic-boric acid piperazine neopentylgcol ester) named MBPNE was synthesized. The chemical structure of MBPNE was analyzed by FTIR, 13 C and 31 P solid-state NMR tests. The results of thermal gravimetric analysis indicated that MBPNE possessed excellent charring capability, and its residual char was 27.5 mass% at 800 °C. Besides, MBPNE occurred melting and expansion process during charring evolution process. MBPNE was used to prepare flame retardant polyolefin elastomer (POE) composites. The 1.6 mm POE/MBPNE specimens achieved UL-94 V-0 rating and their LOI value was 25.5% when 22 mass% MBPNE was incorporated. The sheet was extinguished quickly after departing the flame, and no dripping appeared. Furthermore, the incorporation of MBPNE effectively enhanced the residual char mass after cone calorimeter tests, and the heat release was suppressed. The compact, expanded, partially graphitized and coherent char layer was generated on POE composites surface during burning process and exerted isolation effect in condensed phase. Meanwhile, the degradation products of MBPNE quenched active free radicals in gaseous phase, which effectually interrupted the combustion chain reaction of POE composites. Consequently, the POE composites were endowed excellent flame retardant performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 8
·2443-2454
·
IF 2.647
Liu Xiaopeng,Liu Yan,Wang Yun,Yuan Dingzhong,Wang Changfu,Liu Jinbiao
In this paper, polyphosphazene was synthesized as precursors using benzene-1,4-diboronic acid and hexachlorocyclotriphosphazene (HCCP) by a simple one-step ultrasonic method. Furthermore, B, N, and P co-doped carbon materials containing phosphate functional groups (denoted as BNPCs-PO 4 ) was obtained by the carbonization and functionalization of precursors at high temperature. Through the structural characterization and the investigation of electrochemical and electrosorption properties, it can be proved that BNPCs-PO 4 has excellent porous structure and electrosorption properties with the maximum electrosorption capacity of 750 ± 40 mg/g for U(VI) and the equilibrium time of 24 min. The optimal pH and applied potential for electrosorption were 5.0 and 0.9 V, respectively. Meanwhile, it also showed high selectivity under the coexistence of multiple metal ions and excellent recyclability after six cycles. The results showed the introduction of heteroatoms improved the electrosorption properties of carbon materials and BNPCs-PO 4 can be utilized as electrode for the removal of U(VI) in aqueous solution.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yuxiao Gao,Ying Zhao,Hongru Liu,Mingyu Shao,Zhi Chen,Tianyi Ma,Zexing Wu,Lei Wang
Developing efficient and cost-effective catalysts for hydrogen evolution reaction (HER) is vital to hydrogen energy's commercial applications. In this study, N,P-doped carbon supported ruthenium (Ru) doped triruthenium tetraphosphide (Re 3 P 4 ) (Ru-Re 3 P 4 /NPC) with porous nanostructure is prepared using the low-toxic melamine phosphate as the carbon and phosphorous source. The in-situ generated N,P-doped carbon layers play a pivotal role in regulating the electrocatalytic activity by avoiding the aggregation of the nanoparticles and increasing the specific surface area. Moreover, Ru doping contributes to the remarkable electrocatalytic performance of the prepared nanomaterials. Impressively, the as-synthesized Ru-Re 3 P 4 /NPC presents remarkable electrocatalytic performances toward HER with small overpotentials of 39 mV, 115 mV, and 88 mV to deliver 10 mA cm −2 in alkaline, neutral, and acidic media. Moreover, the prepared electrocatalyst can drive water-splitting with a small potential of 1.45 V@10 mA cm −2 and use sustainable energies, including solar, wind, and thermal, as electric resources. This work paves a novel and valuable way to enhance the electrocatalytic performances of metal phosphides.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Liuyun Chen,Xinling Xie,Tongming Su,Hongbing Ji,Zuzeng Qin
Photocatalytic hydrogen production from water splitting production is a promising strategy to solve the energy crisis and environmental pollution. In the present work, Co 3 O 4 /CdS composites were prepared by ultrasonication and stirring, and used for photocatalytic water splitting. The results showed a Co-S chemical bonds were formed at the interfaces between the Co 3 O 4 and the CdS, which promoted the charge transfer rate between the CdS and Co 3 O 4 . Meanwhile, the recombination of the electron-hole pairs was further restrained by the Co 3 O 4 /CdS p-n heterojunction. The 10%-Co 3 O 4 /CdS composites exhibited an excellent photocatalytic hydrogen production rate of 142.62 μmol∙h −1 , which was 20 times higher than that of CdS (6.85 μmol∙h −1 ), and the Co 3 O 4 /CdS showed excellent stability in the photocatalytic water splitting reaction. Moreover, a formation process of Co 3 O 4 /CdS p-n heterojunction and a mechanism of Co 3 O 4 /CdS p-n heterojunction avoiding the recombination of photocatalytic electrons and holes to enhance photocatalytic activity was proposed.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Min Mao,Jing Xu,Lingjiao Li,Sheng Zhao,Xuanhao Li
Using sunlight to catalyze water to produce H 2 is a key technology to solve the problem of energy shortage. In this research, perovskite-type NiMnO 3 and Ni 3 S 4 was recombined through secondary hydrothermal treatment . The optimal hydrogen evolution for composite materials NiMnO 3 /Ni 3 S 4 is 3.76 μmol mg −1 h −1 , that 3.7 and 4 times more than that of two monomer materials, respectively. After four cycles of catalytic experiments, proving the high efficiency and stability of the composite catalyst. The characteristics of fluorescence spectroscopy and electrochemistry have confirmed the existence of p-n heterostructures , the excellent catalytic performance is related to the built-in electric field (accelerating the separation and utilization of photocharges) generated by the combination of NiMnO 3 and Ni 3 S 4 . Strengthening the performance of the catalyst by constructing a heterostructure is an effective modification strategy and has positive application value in the fields of sensors and optoelectronics .
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qi Wu,Huiling Guo,Huajun Sun,Xiaofang Liu,Huiting Sui,Fang Wang
Flexible piezoelectric energy harvesters (PEHs) have attracted extensive interest because of their ability to transform mechanical energy into electric power. Here, PEHs were fabricated using P(VDF-TrFE)-based piezoelectric composite films containing lead zirconate titanate (PZT) powder and –OH-functionalized graphene (HOG) nanosheets (HOG-P/P). Among all composites, a high open-circuit voltage ( V oc) of approximately 50 V p-p and a maximum power density of 1.4 μW/cm 2 were obtained from a HOG-P/P PEH with 0.10 wt% HOG nanosheets and 15 wt% PZT under bending–releasing mode. Moreover, the PEH exhibited a stable voltage output after 3000 bending–releasing cycles. In addition, the PEH harvested mechanical energy from human body movements and generated an output voltage and current of 60 V and 8 μA during the finger bending–releasing process, lighting up 30 commercial white LEDs. The enhanced piezoelectric performance can be attributed to the introduction of HOG nanosheets and PZT powder. This work provides an effective strategy for improving the output performance of P(VDF-TrFE)-based PEHs.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2021
·
IF 5.268
Shaochun Su,Long Chen,Li Hao,Huayao Chen,Xinhua Zhou,Hongjun Zhou
Avermectin (AVM) is a biopesticide with low toxicity and high activity, but has limited use due to its poor water solubility and easy decomposition. A delivery system that can stabilize this biopesticide can play a significant role for improving its biological activity. Herein, water-dispersible functionalized polysuccinimide nanoparticles (PAD) were prepared by a ring-opening reaction and subsequently used to encapsulate AVM via self-assembly to form AVM@PAD nanoparticles with a loading ratio of 10.04 %. The half-life under UV radiation (300 W) of AVM@PAD was three times higher than that of free AVM, demonstrating the excellent protective ability of PAD. In addition, AVM@PAD nanoparticles could sustain the release of AVM for 70 h with a cumulative release rate of 70 %. AVM@PAD nanoparticles also showed a pH-responsive release, and their maximum cumulative release rate was at neutral pH. Moreover, the median lethal concentration ( LC 50 ) value of AVM@PAD with respect to Plutella xylostella was 34.50 mg/L, while that of free AVM was 56.05 mg/L. These results showed that the AVM@PAD nanoparticles can potentially and effectively promote drug stability and biological activity in agriculture.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Sustainability
·
2021
·
IF 4.524
D. Zheng,C. Lv,X. Zhang,S. Chen,H. Liu,Y. Sun,X. She,D. Li,D. Yang
Developing cost-effective electrocatalysts with efficient activity and superior stability for hydrogen evolution reaction (HER) over a wide pH range is highly desirable and remains a significant challenge. Herein, we report CoP supported RuP 3 nanosheet (RuP 3 –CoP NS) HER electrocatalysts through an ice-templating method. Constructing heterojunctions of RuP 3 and CoP can reduce the loading of scarce Ru species in the catalyst, and meanwhile, maintain efficient HER activity over a wide pH range. The RuP 3 –CoP NS catalyst with only about 15 wt.% loading of Ru species exhibits remarkable HER performance with excellent catalytic stability and low overpotentials of 25, 60, and 81 mV at 10 mA/cm 2 in alkaline, acidic, and neutral media, respectively. The density functional theory calculations indicated that the RuP 3 could induce boosting the catalytic activity of P sites in CoP. The enhancement of the HER performance can be attributed to the electron transfer from RuP 3 to the P sites in CoP, which changes its electronic structure, and thus, optimizing the adsorption strength of H ∗ .
✓ 已验证
产品关联
DOI
高影响因子
TOXICOLOGY LETTERS
·
2021
·
IF 4.374
Shanqi Guo,Yangyi Zhang,Shuo Wang,Tong Yang,Baojie Ma,Xiaojiang Li,Yizhuo Zhang,Xingkang Jiang
Antimony is a common environmental contaminant that causes biological toxicity in exposed populations worldwide. Previous studies have revealed that antimony promotes prostate cancer growth by stabilizing the c-Myc protein and mimicking androgen activity. However, the role of lncRNAs in the regulation of antimony-induced carcinogenesis remains unknown, and the precise mechanisms need to be explored. In the present study, we found that chronic exposure to antimony promoted cell growth and lipid metabolic disequilibrium in prostate cancer. Mechanistically, we identified a long noncoding RNA molecule, PCA3, that was substantially upregulated in LNCaP cells in response to long-term antimony exposure. Functional studies indicated that abnormal PCA3 expression modulated antimony-induced proliferation and cellular triglyceride and cholesterol levels. In addition, PCA3 levels were found to be inversely correlated with MIR-132-3 P levels by acting as a decoy for MIR-132-3P. Besides, SREBP1 directly interacted with MIR-132-3 P to increase cell growth and disrupt lipid metabolism by targeting its 3’UTR regions. Taken together, our results revealed that lncRNA PCA3 promotes antimony-induced lipid metabolic disorder in prostate cancer by targeting MIR-132-3 P/SREBP1 signaling.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 6
·7574-7586
·
IF 2.478
Ni Xinyao,Feng Hao,Li Lihui,Liu Xiaoyun,Wang Tianyi,Cui Zhong-Kai,Gu Jinlou,Zhuang Qixin
Nanocomposites with great thermal stability and excellent dielectric properties play a vital role in the development of high-temperature resistant capacitors. A facile yet effective method to synthesize enhanced dielectric properties of thermostable three-phase poly(p-phenylene benzobisoxazole) (mCCTO@CFGO/PBO) nanocomposite films is demonstrated in this work. The amino-functionalized oxide CaCu 3 Ti 4 O 12 nanoparticles (mCCTO) are enwrapped by the carboxyl-functionalized ultrathin graphene shells (CFGO), forming the silk-cocoon structure to achieve homogeneous dispersion in the matrix. The final films are fabricated via in situ polymerization by introducing the mCCTO@CFGO nanoparticles into the PBO precursor polymer. The mCCTO@CFGO/PBO nanocomposite films exhibit high thermal stability (the 5% thermal decomposition temperature is 655 °C), while the unique silk-cocoon structure effectively confers the high dielectric constant up to 86.9 and ultra-low dielectric loss (0.063) with the loading of 10 wt% mCCTO@3 wt% CFGO/PBO at 1 kHz and 200 °C. This promising strategy accelerates the development of electronic devices used under high temperatures.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Jiangping Jing,Zhuoyuan Chen,Chang Feng
This article specifically addresses the issue that there is no suitable method to determine the semiconductor types of non-uniformly distributed corrosion products. The photoinduced volt-ampere (i-V) curve is proved to be able to accurately measure the p/n type of corrosion products, in addition, it can also be used to study the transfer direction of the photogenerated electrons and quantitatively measure the photoelectrochemical effects of the corrosion products with semiconducting properties. This work will help to promote the study of the influencing mechanism of light illumination on corrosion process of metals and the photoelectrochemical cathodic protection mechanism.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）