NANO
·
2019
·
IF 1.293
Puhong Wen,Jingjing Guo,Lijun Ren,Chuanchuan Wang,Yuzhu Lan,Xiaowen Jiang
1D α -MoO 3 nanobelts were prepared using ammonium heptamolybdate tetrahydrate [(NH 4 ) 6 Mo 7 O 2 4 ⋅ 4 H 2 O] as raw material by one-step hydrothermal method without template or guide agent at 180 ∘ C. The layered α -MoO 3 nanobelt electrode has favorable electrochemical performance, and displays a fairly high specific capacitance, which can be up to 445 F/g at a current density of 0.5 A/g.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Jie Wang,Quanxing Zheng,Hongliang Lu,Jianqiang Fan,Xiaohua Deng,Wenjing Song,Pengfei Ma,Weikun Lai
Selective aqueous hydrogenolysis of cellulose to valuable ketones and alcohols is attractive for biomass utilization. This work developed a TiO 2 layer coated MoO 3 nanorod supported Ni catalyst for the hydrogenolysis of cellulose to ketones and alcohols, which achieved a maximum hexacarbon keto-alcohols yield of 71.2 % with a complete cellulose conversion at 220 °C and 3 MPa H 2 . The interaction of Ni and TiO 2 -MoO 3 oxides provided effective channels for hydrogen transfer, thereby boosting the reduction of MoO 3 to form MoO 2 species. More Lewis acid sites were created which facilitated the isomerization of glucose and retro -aldol condensation of fructose. The cleavage of C O bonds in hydroxyl-containing intermediates thus promoted their selective hydrogenolysis to form ketones and alcohols. Particularly, Ni TiO 2 /MoO 3 catalyst demonstrated excellent reusability due to the protective coating of TiO 2 layer and could be widely used in selective hydrogenolysis of various oxygen containing compounds.
研究领域:
化学工程
·
可再生能源
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 38
·15009-15014
·
IF 5.101
Jiangbo Hu,Anas Ramadan,Fang Luo,Bin Qi,Xiaojiao Deng,Ji Chen
We introduce an easy and scalable approach to synthesize α-MoO3-decorated graphene sheets from a graphite electrode by molybdate-assisted electrochemical exfoliation. The samples were examined by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transformation infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray diffraction and thermogravimetric analysis. TEM analysis shows that the exfoliated material consists of mainly a few-layers of graphene and the results of XPS, FT-IR and Raman confirmed the presence of α-MoO3 on the graphene sheets. Moreover, XPS spectra indicate that the content of surface oxygen groups on the graphene sheets is lower than that on graphite oxide. After being heat-treated at low-temperature (200 °C), samples exhibited high conductivity (up to 5367 S m−1) and good specific capacitance (up to 86.3 F g−1) when tested as electrode materials in a supercapacitor.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Hong Yan,Zengwei Zhu,Yumei Long,Weifeng Li
Graphitic carbon nitride (g-C 3 N 4 ) with desired microstructure and chemical functionalities has been drawing considerable interests in terms of their potential applications for environmental treatment and clean energy production. Herein, a novel structure of MoO 3-x ―intercalated g-C 3 N 4 (Mo-g-C 3 N 4 ) and the synthesis strategy were demonstrated by using melamine molybdate as a precursor. The single-source precursor of melamine molybdate ensured the homogeneous mixing between MoO 3-x and g-C 3 N 4 at molecular level. Meanwhile, the strongly chemical interaction between melamine and molybdate promoted the in-situ intercalation of MoO 3-x into g-C 3 N 4 interlayer. The intercalation of MoO 3-x not only improved the visible-light absorption ability, but also facilitated charge separation through interlayer pathway for g-C 3 N 4 . As expected, the Mo-g-C 3 N 4 possesses enhanced activity in the photo-degradation of methyl orange and photo-destruction of Escherichia coli ( E. coli ) bacteria illuminated by visible light. The radicals trap experiments revealed that the holes (h + ) are dominant species in the photocatalysis process over Mo-g-C 3 N 4 . Accordingly, a possible photocatalysis mechanism of pollutants over Mo-g-C 3 N 4 was developed. This study opens up a new way for optimizing microstructure of g-C 3 N 4 -based materials with favorable photocatalytic properties.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ramzi Nasser,Hao Zhou,Feng Li,Habib Elhouichet,Ji-Ming Song
Heterostructured nanomaterials tend to have a high proportion of oxygen vacancies (V O ) due to the presence of heterogeneous interfaces. Herein, a new kind of heterostructured MoO 3 @CoWO 4 nanobelts was successfully evaluated as fascinating cathode material . SEM and TEM analysis indicated that the MoO 3 nanobelts were fully blanketed with CoWO 4 nanodots . The generation of Vo species was confirmed by XPS and EPR data. By profiting both synergistic and Vo generation effects, MoO 3 @CoWO 4 electrode displayed an excellent capacitance of 246 mAh·g −1 (1966 F·g -1 at 0.5 A·g −1 ) with high-rate capability of 174 mAh·g −1 (1394 F·g −1 at 30 A·g −1 ) as well as superb stability of 94 % (over 15,000 cycles). Notably, all-solid-state device delivered a good energy value of 63.1 Wh·kg −1 at 375 W·kg −1 . Interestingly, the supercapacitor device showed super-low self-discharge comportment of only 12.1 % during 24 h. Importantly, the generation of the V O defects could control the ions diffusion process and lead a sharp decrease in the self-discharge process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 6
·2402-2407
·
IF 3.288
Shouli Bai,Jingyi Han,Xiangxiang Fan,Jian Guo,Ruixian Luo,Dianqing Li,Aifan Chen
One-dimensional α-MoO3 nanorods were synthesized by a hydrothermal method and BiVO4 nanoparticles were grown directly onto the α-MoO3 nanorods using a simple metal organic decomposition process in order to construct an α-MoO3/BiVO4 composite with a heterojunction, for the fabrication of a rapid response triethylamine (TEA) sensor. The morphology and structure of the composite were characterized via various spectral techniques and the sensing properties of the sensor for TEA were investigated via resistance measurements. The results showed that the response of the 16Mo/Bi composite to 20 ppm TEA was 1.86 times and 15 times higher than those of α-MoO3 and BiVO4, respectively, at an optimum operating temperature of 125 °C. The enhancement can be ascribed to the existence of a heterojunction between α-MoO3 and BiVO4, creating an additional barrier at the interface of the heterojunction, and this increases the resistance of the composite in air and decreases the resistance in TEA, thus enhancing the response of the composite to TEA.
研究领域:
材料科学
·
化学传感器
·
纳米材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xueqian Zhao,Weiqiang Zhou,Liming Xu,Danqin Li,Zian Huang,Mingming Zhang,Yize Li,Xiaojing Hao,Jingkun Xu
MoO 3 with Pt-like d-band center electronic structure is an ideal catalyst carrier, but its low conductivity, wide-bandgap and poor photoresponse limits the application of photoelectrocatalysis. Designing doping and oxygen vacancies simultaneously in MoO 3 is a candidate strategy to address some challenges. Herein, a 2D oxygen-vacancies Ce-MoO 3 /Pt (OVs-Ce-MoO 3 /Pt) nanosheet is developed using a two-step method of hydrothermal and chemical reduction. The band gap, optical properties, and methanol adsorption capacity of MoO 3 are well regulated after Ce doping and oxygen vacancy introduction. Profiting by the synergistic promotion of sufficient oxygen vacancies and Ce element, the OVs-Ce-MoO 3 /Pt catalyst exhibits super-efficient photoelectrocatalytic activity (2858 mA mg −1 ) and poisoning-tolerance ability towards methanol oxidation, which is superior to the Ovs-MoO 3 /Pt catalyst (1542 mA mg −1 ) and commercial JM Pt/C catalyst (377 mA mg −1 ). These results indicate that the OVs-Ce-MoO 3 /Pt catalyst can serve as a highly promising catalyst in the field of photoelectrocatalysis.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Siyi Li,Bin Liu,Huayang Tian,Yujie Ning,Shuo Wu,Yihan Song,Qi Wang
The practical application of photocathodic protection (PCP) technology has been hindered by its failure in darkness. In this work, The BiVO 4 /MoO 3 composites were synthesized through a simple hydrothermal method, which were used as functional fillers, and then added to polyurethane resins to prepare energy-storing PCP coatings. This achievement enabled efficient PCP even in darkness. The 304 stainless steel coated with PCP coating (PB 10 M 1 ) exhibited excellent photoelectrochemical properties as photocurrent density of 394 μA/cm 2 , and the corrosion potential decreased by about 350 mV. Furthermore, the cathodic protection effect of PB 10 M 1 could last for 15 h in the dark, showing exceptional stability, superior energy-storage ability and potential application. The superior PCP performance of BiVO 4 /MoO 3 should be attributed to the cooperative effect in heterojunction structure and electronic regulation revealed by electrochemical characterizations and DFT calculation.
研究领域:
材料科学
·
电化学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shu Yan,Fan Yang,Xianhui Dong,Chao Zhang,Xinda Xu,Zongtao Chi,Woochul Yang,Wanfeng Xie
Real-time monitoring of triethylamine (TEA) is critical to environmental safety and daily life. However, detailed challenges remain for TEA gas sensors, such as low-cost and facile synthetic methods, and low working temperatures. In this study, a combination of hydrothermal and wet chemical approaches is utilized for the rational construction of α -MoO 3 @WO 3 with a sheet-like nanostructure. Additionally, the sensing performances towards triethylamine are investigated. According to the results, it was found that the α -MoO 3 @WO 3 sensor has a higher response value (80.4) and faster response and recovery times (9/26 s) than those of pristine MoO 3 at low optimum temperature (200 °C). Again, the α -MoO 3 @WO 3 based sensor also demonstrated high selectivity to TEA as well as good stability. The enhancement of the MoO 3 @WO 3 sensor's gas-sensitive mechanism may be attributed to the formation of n-n heterojunction between MoO 3 and WO 3 and the synergistic effect of both.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Weijie Zhang,Lufang Fan,Kai Wei,Changchang Ma,Sheng Feng
This work provided innovative apertures with great exploratory value for engineering oxygen defects and designing S-scheme photocatalysts for efficient photocatalytic hydrogen production. In this study, the S-scheme heterostructure CdLa 2 S 4 /MoO 3-x (CLSMO) was synthesized by electrostatic self-assembly to solve the problem of electron hole recombination in hydrogen evolution half-reaction. The results showed that the hydrogen precipitation rate of the optimized CLSMO was 41.41 mmol g -1 h −1 , which was 12.70 times higher than that of monomeric CLS. The presence of oxygen vacancies (Ovs) increased the range of light absorption and reduces the surface dynamic barrier. More importantly, the experimental results and density functional theory (DFT) calculations showed that CdLa 2 S 4 and MoO 3-x strictly followed the S-scheme charge transfer path, accumulating photogenerated electrons in the CLS conduction band, and achieving efficient photocatalytic hydrogen evolution. This study provided a new idea to solve the problem of photocatalyst activity using OVs and S-scheme heterojunctions.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dongfeng Hong,Kejing Zhang,Mingshuo Yang,Ruijing Yang,Yusheng Xu,Qiudong Duan,Dacheng Zhou,Yongjin Li,Zhengwen Yang,Zhiguo Song,Yong Yang,Qi Wang,Jianbei Qiu
Photocatalytic conversion of CO 2 into valuable fuels is considered a promising approach for the development of sustainable and renewable energy sources. In this study, we utilized Mo-MOF as a precursor to obtain MoO 3 by pyrolytic derivatization and treated it to obtain MOF-MoO 3-x containing oxygen vacancies as a catalyst for the photocatalytic reduction of CO 2 to CO. MOF derivatization altered the morphology of the MoO 3 , which made the formation of oxygen vacancies easier and facilitated the separation of electron-hole pairs. Meanwhile, the increased specific surface area and the appearance of surface oxygen vacancies enhanced the CO 2 adsorption and activation capabilities of MOF-MoO 3-x . As a result, MOF-MoO 3-x demonstrated a significant enhances in the photoreduction activity of CO 2 . Its CO yield was 29.1 μmolg −1 h −1 , which was 3.7 times higher than that of MOF-MoO 3 and 2.4 times higher than that of H-MoO 3-x . This innovative strategy may provide a new avenue for improving the comprehensive performance of photocatalysts and developing renewable energy sources.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 24
·30243-30253
·
IF 3.056
Xu Wenqing,Gao Lei,Yang Yang,Zhu Tingyu,Qi Guisheng
The deposition of NH 4 HSO 4 on catalysts is one of the key issues for selective catalytic reduction of NO x . In this study, NH 4 HSO 4 was preloaded on catalysts, and the effects of MoO 3 and CeO 2 doping on the decomposition and reactivity of NH 4 HSO 4 on V 2 O 5 /TiO 2 catalysts are studied. The results show that the introduction of MoO 3 and CeO 2 significantly promoted NO x conversion on the V 2 O 5 /TiO 2 catalysts. Doping with MoO 3 could effectively enhance the S and H 2 O resistance of the catalysts. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis indicate that it is the strong chemical interactions between NH 4 HSO 4 and the catalysts that are adverse to the decomposition of NH 4 HSO 4 . However, doping with MoO 3 apparently inhibits these interactions, which significantly decrease the decomposition temperature of NH 4 HSO 4 . In situ FTIR experiments show that the NH 4 + in preloaded NH 4 HSO 4 could react with gaseous NO on catalysts, and doping with MoO 3 could facilitate the reaction rate.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）