PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2023
·Vol. 260
·期 4
·2200455
·
IF 1.6
Yijun Wang,Jinhua Li,Kaixi Shi,Fengxue Tan,Wanyu Wang
All-inorganic lead halide perovskite CsPbBr 3 has received a lot of attention in the field of optoelectronic devices due to its high absorption coefficient and photoelectric conversion efficiency. Using a heterojunction as the core of a photodetector (PD) to transform the optical signal into an electrical signal compensates for the deficiencies of using a single material. Here, a simple and efficient chemical vapor deposition (CVD) method is used to fabricate a CsPbBr 3 /MoO 3 /ITO heterojunction PD with superior photoresponse properties, including photoresponsivity of 37.209 A W −1 and detectivity of 1.64 × 10 12 Jones at bias voltage of 3 V. Compared with pure CsPbBr 3 perovskite, the responsivity of the PD is 3.54 times as great. As a photosensitive layer, CsPbBr 3 absorbs photons and releases electrons due to its high optical absorption coefficient. The introduction of MoO 3 plays a role in promoting the separation and transport of photogenerated carriers of the heterojunction structure and improves device performance. This study provides groundwork facilitating the use of CVD for in situ growth of high-performance all-inorganic perovskite heterostructures to realize the prospect of large-scale production of perovskite PDs.
研究领域:
材料科学
·
光电探测器
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2018
·
IF 3.649
Matteo Ciprian,Peng Xu,Somboon Chaemchuen,Rong Tu,Serge Zhuiykov,Philippe M. Heynderickx,Francis Verpoort
For the first time, MoO 3 nanoparticles (NPs) with a size ranging from 1.5 to 60 nm were deposited on spray dried zeolitic imidazolate framework-8 (ZIF-8) by rotary chemical vapor deposition (RCVD) in order to improve its photocatalytic performance. A direct effect of the deposition time on the metal oxide loading was observed. In a time frame between 0.9 and 2.7 ks the metal oxide loading can be increased from 1 to 3 wt%. All the MoO 3 -NPs/ZIF-8 catalysts were tested towards the methylene blue photodegradation using sunlight. MoO 3 -NPs/ZIF-8 3 wt% RCVD reached a conversion of 82% and 95% after 180 and 300 min, respectively.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Fenghao Shu,Guangcai Long,Yanwu Chen,Ying Gao,Menghao Jiang,Jinxing Long
Conversion of renewable lignin to value-added aromatic chemicals presents a broad prospect to achieve the goals of “carbon neutrality”. In this work, an efficient approach is proposed for selective hydrogenolysis of lignin to valuable 4-propyl syringol in the presence of cost-effective catalyst of y Ni/ZrO 2 - x MoO 3 . When the lignin hydrogenolysis is performed with 15Ni/ZrO 2 -10MoO 3 , 15.4% yield of monophenols is achieved, which is approximately twice as that from the 15Ni/ZrO 2 catalytic system (7.8%). Importantly, 33.1% of these monophenols are identified as 4-propyl syringol (4-PS), a versatile fine chemical. An extensive characterization of the modified catalysts by means of XRD, nitrogen adsorption–desorption isotherm, SEM, TEM, XPS, NH 3 -TPD, CO 2 -TPD, and H 2 -TPR, confirms that the introduction of MoO 3 changes the primary phase of ZrO 2 and the acidity/basicity properties of catalyst. As a result, an enhanced cleavage of the C-O linkage between S-lignin and other units is demonstrated, which consequently contributes to the good selectivity of 4-propyl syringol. Therefore, this work provides a new insight for producing bulk aromatic chemicals via a sustainable route.
研究领域:
化学工程
·
可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Fuyan Chen,Bowen Liu,Wei Shao,Jiaxin Gao,Chenxi Zhao,Dongdong Shen,Daocheng Pan,Xinan Shi
Compared with the traditional Mo back electrode of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells, the transparent and conductive electrode of fluorine-doped tin oxide (FTO) has the advantages of low lattice mismatch with the CZTSSe absorber, earth-abundant composition, transparency, and advanced applications in building integrated photovoltaics. Hence, the research of bifacial FTO/CZTSSe thin film solar cells has attracted more and more attention. However, the poor interface contact between n-type FTO/p-type CZTSSe prevents the improvement of power conversion efficiency (PCE) of CZTSSe thin film solar cells deposited on the FTO substrate. Therefore, back contact interface modification is an effective strategy to promote the performance of the FTO/CZTSSe solar cells. Here, we choose the solution-processed MoO3 as the interface layer to modify the interface of FTO/(Cu,Ag)2ZnSn(S,Se)4 (CAZTSSe), and systematically investigate the effects of the thickness of MoO3 interface layer on the performance of FTO/MoO3/CAZTSSe solar cells. It is found that the optimal thickness of the solution-deposited MoO3 interface layer is 30 nm. As a result, kesterite solar cells on the FTO substrate achieve a front-side PCE of 9.49 % and a rear-side PCE of 1.04%.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Yirui Shen,Pingping Jiang,Yingchun Wang,Gang Bian,Phyu Thin Wai,Yuming Dong
A general thermal decomposition strategy is reported to fabricate MoO 3 @SiO 2 nanoreactors , with a mesoporous silica shell and embedded MoO 3 nanoparticles . The novel preparation procedure involves mixing certain mass ratio of (NH 4 ) 6 Mo 7 O 24 ·4H 2 O (AMM) and hollow mesoporous silica spheres (HMSS) by grinding, fusion and thermal decomposition of (NH 4 ) 6 Mo 7 O 24 ·4H 2 O under calcination and removing the residual via filtration. The as-prepared MoO 3 @SiO 2 nanoreactors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), N 2 adsorption/desorption and X-ray photoelectron spectra (XPS). The nanoreactors were utilized in epoxidation of alkenes and displayed high catalytic activity and stability. The mass ratio of AMM and HMSS greatly affected the properties and catalytic performance of the nanoreactors. The optimal mass ratio of AMM: HMSS has been confirmed as 1/2. After reacting for 12 h with H 2 O 2 (50 wt%) as oxidant, conversion and selectivity of optimal MoO 3 @SiO 2 -400-1/2 almost reached up to 98% and 99%, respectively. Furthermore, the catalyst still had high conversion (78%) and selectivity (95%) at 4 h epoxidation of cyclooctene after recycling for 6 runs. Kinetics study was also carried out and demonstrated the epoxidation of alkenes follows the first order model.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 85
·69388-69393
·
IF 3.84
Qin Zhou,Shurong Fu,Min Zou,Yiming He,Ying Wu,Tinghua Wu
A magnetic MoO3/Fe3O4 catalyst was prepared and used in the oxidative desulfurization (ODS) of dibenzothiophene (DBT), benzothiophene, and thiophene. The morphology and components of the magnetic composite material were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy techniques. Results indicated that MoO3 as an active species was supported on Fe3O4. High calcination temperature leads to the formation of Fe2(MoO4)3 compounds which showed lower activity than MoO3. The highest conversion of 99.5% for ODS of DBT can be achieved on MoO3/Fe3O4 calcinated at 400 °C. In addition, the amount of MoO3/Fe3O4, TBHP/DBT molar ratio and reaction temperature played vital roles in desulfurization efficiency. This work showed the possibility for the utilization of low cost magnetic MoO3/Fe3O4 composite in the oxidative desulfurization because it shows high activity and could be easily separated by applying an external magnetic field, achieving ten times recycling without significant decrease in activity.
研究领域:
催化化学
·
环境化学
·
能源化工
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材料化学
·
石油炼制
✓ 已验证
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Wang Xianhui,Pei Chunlei,Zhao Zhi-Jian,Chen Sai,Li Xinyu,Sun Jiachen,Song Hongbo,Sun Guodong,Wang Wei,Chang Xin,Zhang Xianhua,Gong Jinlong
Redox catalysts play a vital role in chemical looping oxidative dehydrogenation processes, which have recently been considered to be a promising prospect for propylene production. This work describes the coupling of surface acid catalysis and selective oxidation from lattice oxygen over MoO 3 -Fe 2 O 3 redox catalysts for promoted propylene production. Atomically dispersed Mo species over γ-Fe 2 O 3 introduce effective acid sites for the promotion of propane conversion. In addition, Mo could also regulate the lattice oxygen activity, which makes the oxygen species from the reduction of γ-Fe 2 O 3 to Fe 3 O 4 contribute to selectively oxidative dehydrogenation instead of over-oxidation in pristine γ-Fe 2 O 3 . The enhanced surface acidity, coupled with proper lattice oxygen activity, leads to a higher surface reaction rate and moderate oxygen diffusion rate. Consequently, this coupling strategy achieves a robust performance with 49% of propane conversion and 90% of propylene selectivity for at least 300 redox cycles and ultimately demonstrates a potential design strategy for more advanced redox catalysts.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 11
·8780-8786
·
IF 3.086
Jinhua Zhou,Juan Song,Huihua Li,Xiaomiao Feng,Zhendong Huang,Shufen Chen,Yanwen Ma,Lianhui Wang,Xiaohong Yan
Novel nanoflake-like and nanobelt-like α-MoO3/graphene nanocomposites were synthesized by a facile hydrothermal method through tailoring the content of Mo source. The formation mechanisms of α-MoO3/graphene nanocomposites with different morphologies has been investigated. As a model, the α-MoO3/graphene nanocomposites were studied for electrochemical energy storage supercapacitor devices. The results showed that α-MoO3 nanoflakes/graphene displayed better supercapacitive performances than that of α-MoO3 nanobelts/graphene, arising from the structural superiority and optimum compositions. The best composite exhibited a high specific capacitance (up to 360 F g−1) at a current density of 0.2 A g−1, good rate capability, and a nearly 100% long-term cycle stability. This study provided a facile and optimal experimental design to prepare α-MoO3/graphene composite materials which act as promising electrode materials for high-performance supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2019
·Vol. 9
·期 11
·4429-4437
·
IF 2.673
Meng Wang,Meng Wang,Shaolong Huang,Yu-Jia Zeng,Jingwei Yang,Jihong Pei,Shuangchen Ruan,Shuangchen Ruan
We reported on a passively Q-switched double-clad thulium-doped fiber laser by using oxygen vacancies (OVs) enriched with MoO3-x as a saturable absorber (SA). The MoO3-x was successfully embedded in polyvinyl alcohol and acted as the SA for a stable Q-switching operation in the 2 µm wavelength region. Stable Q-switched pulses were obtained at a central wavelength of ∼1992.1 nm with a maximum output power of ∼62.7 mW, maximum pulse energy of ∼1.63 µJ and a minimum pulse duration of ∼2 µs. The repetition rate of the pulses can be tuned from ∼15.5 kHz to ∼38.5 kHz with increasing the pump power. Our experiment was the first demonstrated use of MoO3-x as a SA for pulse laser generation, in which OVs were considered as the original reason for the optical saturable absorption. Moreover, it provides a novel idea for optical SA preparation by controlling the vacancy defects in such materials.
研究领域:
光学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2011
·
IF 1.795
Mengjia Yuan,Shengtian Wang,Xiaohong Wang,Lingling Zhao,Tianhong Hao
A new macroporous ZnO/MoO 3 /SiO 2 hybrid was synthesized by a method involving sol–gel technology and biomimetic synthesis. It was characterized by Elemental analysis, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS) and scanning electron microscopy (SEM). Chemical degradation of 0.3 g/L Safranin T (ST) by air oxidation over macroporous ZnO/MoO 3 /SiO 2 hybrid was studied. It was found that the decolorization efficiency and the chemical oxygen demand (COD) removal of ST reached above 95.3% and 93.2%, respectively, within 25 min at room temperature and atmospheric pressure. And the organic pollutant was mineralized to simple inorganic species such as HCO 3 − , Cl − and NO 3 − , while the total organic carbon (TOC) decreased 95.4%. The structure and morphology of the catalyst were still stable after six cycling runs and the leaching test showed negligible leaching effect.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 6
·3523-3537
·
IF 5.7
Zhang Yang,Cao Jiamin,Zhou Yuhao,Li Yan,Li Lu,Xie Xin-an
In this paper, a green approach is developed for the effective conversion of corn stalk cellulose to glycolic acid with MoO 3 . The effect of different factors (amount of MoO 3 , reaction temperature, reaction time and the concentration of cellulose) were studied on conversion of cellulose. The total organic acids (glycolic acid, formic acid and lactic acid) yield of 48.2% with 93% conversion was obtained from cellulose at the optimal conditions (0.04 mol MoO 3 , 2 wt% cellulose concentration, 210 °C, 60 min), and the maximum yield of glycolic acid was 23.4%. Furthermore, the mechanism of MoO 3 -catalyzed epimerization of glucose to mannose was investigated by performing density functional theory calculations. The results indicated that the coordination between MoO 3 and the O1 sites of glucose was optimal, and MoO 3 significantly reduces the overall reaction barrier for glucose epimerization, which is the main reason why MoO 3 can promote the conversion of cellulose to glycolic acid.
研究领域:
化学工程
·
可再生资源利用
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2024
·
IF 10
Wenjing Jiao,Benlin He,Ziyu Wang,Shouhao Sun,Meng Wei,Weilin Liu,Mingran Sun,Haiyan Chen,Haiyan Li,Jialong Duan,Qunwei Tang
The photovoltaic performance of perovskite solar cells (PSCs) is closely dependent on the efficient carrier extraction and transport at the interface. Here, a polyaniline (PANI) functionalized MoO 3 (PANI/MoO 3 ) hole transport material (HTM) is exploited to perfect the interface between the perovskite layer and carbon electrode in all-inorganic CsPbBr 3 PSCs. After functionalization with PANI, the p-type behavior and the hole mobility and conductivity of MoO 3 are improved by reducing the oxygen vacancies , which boosts the hole extraction and transport, energy level arrangement at the interface of CsPbBr 3 perovskite/(PANI/MoO 3 ) HTM. Meanwhile, the PANI/MoO 3 with rich C–N and N–H groups introduced by PANI passivates the ions trap states of perovskite films by the C–N⋯Pb 2+ (Cs + ) Lewis acid-base coordination and the N–H⋯Br − hydrogen bonding , leading to an effective suppression of non-radiative recombination for improved carrier extraction. As a result, the PANI/MoO 3 HTMs-based CsPbBr 3 PSCs obtain a remarkably increased power conversion efficiency of 10.41 %, in comparison with the efficiency of the original device (6.55 %). In addition, the unencapsulated device with PANI/MoO 3 HTMs shows excellent long-term stability with 93.9 % maintenance of the initial efficiency after storing in air with 85 % relative humidity and at 85 °C for 30 days.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）