JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
·
IF 14.3
Wenjiao Chang,Honghuo Wang,Tingting Wu,Shuting Zhang,Yifan Li,Junying Wang,Yongqiang Yang,Lei Wang
Photocatalytic CO 2 reduction reaction is regarded as a potential strategy to convert greenhouse gases into valuable chemicals. However, achieving photocatalysts with high efficiency and target product selectivity under visible light still faces great challenges. Herein, sub-2 nm RuO 2 @TiO 2 (RTO) nanorods with lattice matching interface are rationally designed and prepared via a hydrothermal reaction step-by-step. Due to the strong interaction of the lattice-matched interface with the Ru-O-Ti bond, new energy levels have emerged at the interface, leading to effective visible light absorbance. Moreover, the photo-generated electrons could be transferred to the RuO 2 efficiently via the lattice-matched interface. As a result, the RTO photocatalyst exhibits superior CO 2 -to-CH 4 conversion performance of 15.6 µmol g −1 with a selectivity of 87.9% under visible light irradiation. Density functional theory (DFT) calculation reveals that the energy barrier of CO* to CO is significantly higher than that of *CHO, resulting in the preferential production of CH 4 . This work provides an effective strategy for designing photocatalyst with promoted visible light absorption and improved product selectivity.
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2012
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IF 2.023
Chundong Li,Jinpeng Lv,Zhiqiang Liang,Shulong Yao
The blue band optical absorption and green luminescence of ZnO phosphors doping with aluminum are systematic studied. The Al content is varied from 0.01 at.% to 1 at.%. SEM images illustrated that Al doping can effectively suppress the ZnO grain growth. XRD results clearly manifest that the Al solubility limit in ZnO is around 0.1 at.%. It is also found that the E 1 (LO) vibration mode in the Raman spectra exhibits a good correlation with the blue band optical absorption and green photoluminescence. The results revealed that both V O 0 and V O + can give rise to the E 1 (LO) vibration mode. We conclude that the V O and O i defects are the dominant reason of the green photoluminescence in ZnO phosphors, in oxygen-deficient and oxygen-rich conditions, respectively.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2016
·
IF 2.322
Xin Liu,Junzhe Jiang,Yushuai Jia,Ailing Jin,Xiangshu Chen,Fei Zhang,Hongxian Han
Pure phase, regular shape and well crystallized nanorods of p-type semiconductor CaFe 2 O 4 have been fabricated for the first time by a facile molten salt assisted method, as confirmed by XRD , TEM, SEM and HRTEM. UV−vis diffuse reflectance spectra and Mott–Schottky plots show that the band structure of the CaFe 2 O 4 nanorods is narrower than that of the CaFe 2 O 4 nanoparticles synthesized by conventional method. The enhancement of the visible-light absorption is due to narrowness of the band gap in CaFe 2 O 4 nanorods. The appropriate ratio between the molten salt and the CaFe 2 O 4 precursors plays an important role in inhibiting the growth of the crystals along the (201) plane to give the desired nanorod morphology. This work not only demonstrates that highly pure p-type CaFe 2 O 4 semiconductor with tunable band structure and morphology could be obtained using the molten salt strategy, but also affirms that the bandgap of a semiconductor may be tunable by monitoring the growth of a particular crystal plane. Furthermore, the facile eutectic molten salt method developed in this work may be further extended to fabricate some other semiconductor nanomaterials with a diversity of morphologies.
研究领域:
材料科学
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半导体物理
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Haibo Li,Haojun Li,Zhennan Zhou,Hua Tong,Bei Long,Wei Liu,Weihua Li
The improvements of light absorption , charge separation and conductivity are the most common methods to enhance the degradation performance of photocatalysts. But the enhancement of hydrophily of photocatalyst is equally important and the designed approach is rarely reported. Here, a simple method to introduce hydrophilic hydroxyl (-OH) on BiOI is proposed by adding citric acid into the reactive system. Further, the conductive metal Bi is grown on BiOI by in-situ reduction. Benefiting from the elevated hydrophily, specific surface area, conductivity and photoinduced carrier separation efficiency, the optimized catalyst shows the outstanding photodegradation of methyl blue and tetracycline hydrochloride (both >90% removal ratio in 15 min). This work opens up a new way to design the high-performance photocatalyst.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 15
·20891-20902
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IF 2.478
Peng Long-Gui,Ni Fu-Rong,Liu Jun,Sun Meng,Chang Meng-Jie,Xi Tong,Li Hui-Lu,Du Hui-Ling,Yang Jie,Li Ying
Bismuth vanadate (BiVO 4 ) is a promising photocatalyst material for photocatalytic degradation of organic pollutions. However, the fast recombination of photo-induced charge and insufficient light absorption often lead to poor photocatalytic performance. Herein, novel fibrous BiVO 4 /CdS (BVO/CdS) heterostructures are constructed by uniformly modifying caterpillar shaped electrospun BiVO 4 nanofibers with controllable quantity of CdS nanoparticles through hydrothermal reaction. The absorption of visible light and separation efficiency of photo-generated charge of BiVO 4 are significantly promoted after the decoration of CdS nanoparticles. As a result, the photocatalytic efficiency of the optimized BVO/CdS sample (BVO/CdS-2 stands for the sample synthesized with 0.05 mmol Cd(CH 3 COO) 2 and CH 4 N 2 S) is 90.43%, which is 3.3 times as high as that of pure BiVO 4 after 180 min irradiation under visible light, respectively. Moreover, the .O 2 − and .OH are the predominant active species for the degradation process indicated by scavengers added photocatalytic experiments. Due to the simple, low-cost and controllable synthetic process, the BVO/CdS heterojunctions are suitable for practical usage.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 19
·17036-17043
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IF 2.22
Zhi Guowei,Wang Wei,Zhang Ming,Hao Lingyun,Yang Lu,Liu Jijinhua,Zhao Yijie
In this work, a synergy structure to improve the photocatalytic properties of materials was proposed. CuSbS 2 nanoparticles synthesized by microwave irradiation method were dispersed in TiO 2 sol to form CuSbS 2 –TiO 2 nanoparticles. The properties of composite materials with different TiO 2 sol concentration were investigated by XRD, XPS, etc. The results indicated the as-synthesized CuSbS 2 nanoparticles exhibited chalcostibite structure and the TiO 2 showed anatase phase. The CuSbS 2 –TiO 2 nanoparticles had high absorbance in the visible light and good photocatalysts for the photodegradation reaction of Rhodamine B (RhB). When TiO 2 sol concentration was 0.23 mol/L, the sample possessed a photocatalytic degradation rate of 0.002 min −1 for the degradation of RhB, which was 3 times higher than that by the bare amorphous TiO 2 (0.0007 min −1 ).
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2023
·
IF 2.8
Li Zezhong,Xu Jing,Liu Zhenlu,Liu Xinyu,Xu Shengming,Ma Yue,Li Qian,Shang Yan
The p–n type Sm 2 WO 6 -Co 9 S 8 heterojunction with two-dimensional coupling interface was successfully synthesized by electrostatic self-assembly. The unique rhombic morphology of Sm 2 WO 6 and Co 9 S 8 nanoparticles also effectively improve the light utilization efficiency. The intervention of Co 9 S 8 enhances the visible light absorption capacity of m 2 WO 6 /Co 9 S 8 . The Sm 2 WO 6 /Co 9 S 8 greatly increases the specific surface area and provides a rich reaction site. Recombination of photogenerated carriers in Sm 2 WO 6 /Co 9 S 8 heterojunctions is effectively inhibited. The p–n type Sm 2 WO 6 -Co 9 S 8 heterojunction results show that the optimized Sm 2 WO 6 /Co 9 S 8 heterojunction exhibits significant hydrogen evolution activity, and the optimal Sm 2 WO 6 /Co 9 S 8 -25 composite has 117.5 μmol hydrogen evolution activity, it’s close to four times Co 9 S 8 , close to 143 times Sm 2 WO 6 . The stability of the composite Sm 2 WO 6 /Co 9 S 8 is the better. Under the built-in electric field induced by p–n heterojunction, using of p–n heterojunction interactions and electron transport modes, the Sm 2 WO 6 /Co 9 S 8 can effectively achieve the remarkable effect of its internal carrier separation. This work also provides new opportunities for studying rare earth element tungstate photocatalysts. Graphical Abstract
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 5
·1-13
·
IF 2.4
Lu Xingyu,Sun Jiahao,Yang Pengfei,Yang Xianjun,Hu Qin,Chen Liuyun,Qin Zuzeng,Su Tongming
CdS photocatalysts have attracted extensive attention in the area of photocatalytic hydrogen generation, yet their limited light absorption and charge transfer efficiencies still restrict their photocatalytic performance. In this study, NiS was grown on CdS to synthesize xNiS/CdS composites via a hydrothermal method and was used for photocatalytic hydrogen evolution. The introduction of NiS increased the light absorption intensity and broadened the light absorption range in the visible light region. In addition, a close contact interface formed between NiS and CdS, which accelerated the transfer and separation of photogenerated electrons and holes. Furthermore, NiS acts as the electron aggregation center and active site for photocatalytic hydrogen evolution. Therefore, the photocatalytic performance of the xNiS/CdS composites was greatly enhanced. Among the xNiS/CdS composites, the 0.5NiS/CdS composite exhibited the optimal photocatalytic hydrogen evolution rate of 36.75 mmol·h − 1 ·g − 1 , which was 7.84 times greater than that of CdS. A possible mechanism of photocatalytic H 2 production over xNiS/CdS is also proposed. This work provides new inspiration for the rational design of high-efficiency cocatalyst/CdS composites. Graphical
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
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IF 6.3
Ruijin Fan,Guanwang Chen,Nianben Zheng,Zhiqiang Sun
Gold nanorods (AuNRs)-doped phase change materials (PCMs) hold great promise for alleviating the instability and imbalance of solar energy due to their exceptional energy storage density and adaptability. However, their poor full-spectrum light absorption and inferior stability lead to insufficient photothermal conversion efficiency. Herein, we devise functional PCMs with synergistic reinforcement of light absorption and photothermal conversion through the in-situ growth of AuNRs on the MXene surface. The results indicate that the bimodal resonance effect of AuNRs and broad-spectrum absorption of MXene synergistically endow a 29.7 % increase in light absorption efficiencies over the pristine composites, which is superior to the sum of the two individually doped phase change composites (PCCs). Similarly, the photothermal storage and conversion efficiencies of the AuNRs/MXene-doped PCC are significantly enhanced by 36.6 % and 78.4 %, respectively. Furthermore, the fluorescence analysis reveals a prolonged fluorescence lifetime of 1.91 ns and a low quantum yield of 0.27 %, demonstrating efficient separation and migration of light-induced carriers and thermal dissipation via non-radiative relaxation, which is because the AuNRs and MXene synergistically enhance the localized surface plasmon resonance effect and the spectral absorption bands. This work offers fresh perspectives on the development of advanced photothermal PCMs for efficient solar thermal applications.
研究领域:
材料科学
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能源工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wanli Zhang,Meigui Ou,Chunlin Yang
In this paper, erbium-doped gadolinium oxide rare earth oxide nanoparticles (Gd 2 O 3 :Er 3+ ) with good light absorption capacity from the visible to the infrared region were prepared by polyol method, and then compounded with TiO 2 by hydrothermal method. SEM, TEM, XPS, UV–vis and electrochemical workstation were used to study the morphology, structure, UV–vis light absorption and photoelectrochemical (PEC) properties of Gd 2 O 3 :Er 3+ /TiO 2 . The results showed that the Gd 2 O 3 :Er 3+ spherical nanoparticles with a particle size of about 15 nm were uniformly distributed on the surface of the TiO 2 nanorod array, and the Gd 2 O 3 :Er 3+ /TiO 2 nanocomposites had good light absorption capacity in the infrared region. Furthermore, the photocurrent densities of Gd 2 O 3 /TiO 2 and Gd 2 O 3 :Er 3+ /TiO 2 were 2.08 and 2.75 times higher than those of TiO 2 , respectively, manifesting that the broadening of infrared light absorption can improve the PEC property of TiO 2 . Meanwhile, the DFT calculation results showed that the energy band of Gd 2 O 3 :Er 3+ /TiO 2 was significantly narrower than that of TiO 2 , indicating that Gd 2 O 3 :Er 3+ /TiO 2 had a redshift phenomenon of UV–vis absorption. The calculation results of state density showed that the f orbital of Gd 2 O 3 :Er 3+ intersected with the d orbital of TiO 2 , indicating that there is an electron transfer between Gd 2 O 3 :Er 3+ and TiO 2 .
研究领域:
材料科学
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光催化
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 76
·72659-72669
·
IF 3.289
Chao Li,Weiyi Yang,Lingmei Liu,Wuzhu Sun,Qi Li
Plasmonic photocatalysis could provide a promising solution to the two fundamental problems of current TiO2-based visible-light photocatalysis on low photocatalytic efficiency and low usage of solar illumination. But till now, most plasmonic photocatalysts have relied on noble metal nanostructures of Au or Ag due to their easy synthesis and efficient absorption of visible light. In this study, a TiN/TiO2 nanocomposite photocatalyst was synthesized by the in situ growth of TiO2 nanoparticles on TiN nanoparticles with a fluorine-free, vapor-phase hydrothermal process. In this composite photocatalyst system, the desirable visible light absorption could be attributed to the LSPR effect of a nanostructured TiN phase. Thus, a plasmonic photocatalyst without noble-metal components was developed, and its good visible light photocatalytic activity was demonstrated by both the photodegradation of organic pollutants of RhB and 4-NP and the disinfection of microorganisms of E. coli. From the energy alignment analysis, hot electrons were expected to be completely injected from TiN to TiO2 once they were excited above the Fermi energy level of TiN because no barrier existed, resulting in better electron injection efficiency than previous reported noble-metal-based plasmonic photocatalysts.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
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2019
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IF 4.85
Mengping He,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Yuena Meng,Sixin Wu
The earth-abundant Cu2ZnSnS4 (CZTS) quantum dots (QDs) have emerged as one potential substitute to toxic cadmium or rare indium QDs, but their application in quantum dot-sensitized solar cells (QDSSCs) is still limited by the improper particle size and the rigorous synthesis and ligand exchange conditions. Herein, we developed a one-pot hot injection method by using Tri-n-octylphosphine oxide (TOPO) as the solvent and oleylamine as the capping agent to synthesize Cu2ZnSn(S,Se)4 (CZTSSe) QDs with adjustable size and narrow size distribution. The key feature of this approach is that we can take advantage of the high-temperature nucleation, low-temperature growth, and strong reducibility of NaHB4 to prepare small-sized CZTSSe QDs without using 1-dodecanethiol (DDT) and to extend the light harvesting range through Se incorporation. After Se incorporation, it turns out that the conduction band (CB) level of CZTSSe QDs decreases, implying that the injection driving force of the electron to the CB of TiO2 films becomes weaker and a larger recombination would be induced at the TiO2/QDs/electrolyte interface. Benefiting from the broadened optoelectronic response range, the induced higher Jsc (16.80 vs 14.13 mA/cm2) finally leads to the increase of the conversion efficiency of CZTSSe QDSSC from 3.17% to 3.54% without further modification. Despite the fact that the efficiency is still far behind those of literature reported values through use of other chalcogenide sensitizers, this DDT-free approach solves the main hindrance for the application of CZTSSe QDs in QDSSCs and holds a more convenient way for ligand exchange, light absorption improvement, and particle size control.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）