JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Feifei You,Tianhao Zhou,Jiaxin Li,Shihui Huang,Chuntao Chang,Xiaoyu Fan,Hao Zhang,Xiaohong Ma,Dawei Gao,Jian Qi,Danyang Li
Solar energy driving CO 2 reduction is a potential strategy that not only mitigates the greenhouse effect caused by high CO 2 level in atmosphere, but also yields carbon chemicals/fuels at the same time. Herein, a facile way to design the heterogeneous TiO 2 @In 2 S 3 hollow structures possessing robust light harvesting in both ultraviolet and visible regions is proposed and exhibits a higher generation rate of 25.35 and 1.24 μmol·g −1 ·h −1 for photocatalytic CO 2 reduction to CO and CH 4 , respectively. The excellent photocatalytic catalytic performance comes from i) the confined heterostructured TiO 2 @In 2 S 3 possesses a suitable band structure and a broadband-light absorbing capacity for CO 2 photoreduction, ii) the rich interfaces between nanosized TiO 2 and In 2 S 3 on the shell can significantly reduce the diffusion length of carriers and enhance the utilization efficiency of photogenerated electron-hole pairs, and iii) enriched surface oxygen vacancies can provide more active sites for CO 2 adsorption.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Nano Research
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2024
·Vol. 17
·期 6
·4834-4843
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IF 9.5
Guo Zhiren,Zhang Xiao,Li Xinyuan,Cui Chang,Zhang Zilei,Li Hansheng,Zhang Dongxiang,Li Jinying,Xu Xiyan,Zhang Jiatao
Photocatalytic oxidation techniques are promising for degradation of the highly ecotoxic and refractory isothiazolinone bactericides in relevant industrial wastewaters. However, low charge separation and directional transport efficiency under solar light radiation restrain their practical application. Here, we report a nanostructured photocatalyst doped with Gd and B in TiO 2 with carbon incorporation and defect formation through incomplete calcination. The specific surface area, grain size, and hydrophilicity of TiO 2 are improved, which is beneficial for the interfacial reaction between the photocatalyst and pollutants. The reduction of the bandgap, the broadening of the photo-absorption range, and the retarded electron-hole recombination promote the photocatalytic performance due to the improved oxygen vacancies based on the electron distribution modification. The difference in partial density of states (ΔPDOS) between the current catalyst and raw TiO 2 indicates that the co-doping of Gd and B with incomplete calcination changes the electronic hybridization of conduction band and valence band near the Fermi level, and affects the band gap energy. It improved charge separation and directional transport efficiency and benefited the formation of main active species, including OH and O 2 − , for the pollutant decomposition. The rate of photocatalytic removal of benzisothiazolinone (BIT) by the current photocatalyst reaches 1.25 h −1 , being 4.31 times that of TiO 2 . The current work offers a constructive approach to the design and synthesis of nanostructured photocatalysts for the photocatalytic degradation of refractory organic pollutants.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Yue Chang,Ying Xuan,Huiying Quan,Hang Zhang,Shuangxi Liu,Zhengcao Li,Kai Yu,Jiangli Cao
As one of the most promising photocatalysts for hydrogen production from water splitting, conventional TiO 2 materials suffer from the low quantum yield and light absorption efficiency. The present study provided a strategy to improve efficiency of TiO 2 -based photocatalysts for hydrogen production from water splitting based on an interesting structure-property relationship. The hydrogen treated Au/TiO 2 photocatalysts with three-dimensionally ordered macroporous (3DOM) structure were successfully synthesized and well characterized through various methods. The 3DOM-structure and Au modification can promote the hydrogenation of TiO 2 . The light absorption can be improved by slow photon effect of the 3DOM structure. And, in the meanwhile, the hydrogenation as well as Au modification can improve the photogenerated carrier separation. In addition, to understand how hydrogenation and Au modification promote electron migration and decrease carrier recombination, the electric band structure for hydrogen treated Au/3DOM-TiO 2 was well studied and we found the local electron field enhancement, surface band bending and the generation of mid-gap state contributed most of enhancement.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Progress in Natural Science-Materials International
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2016
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IF 1.753
Yu Bai,Chunlei Wang,Xingyi Zhou,Junling Lu,Yujie Xiong
Pd typically exhibits relatively low catalytic activity in CO oxidation, as CO is apt to be adsorbed on Pd to poison the surface for O 2 activation. In this Letter, we report that this limitation can be overcome by integrating Pd with TiO 2 . The TiO 2 was coated on Pd nanocubes with a controllable thickness using atomic layer deposition (ALD) method. Given the different work functions of TiO 2 and Pd, the electrons in TiO 2 semiconductor will flow toward Pd. With the electron density increased on Pd, the adsorption of CO to Pd will be weakened while the oxygen activation can be facilitated. Meanwhile, the interface-confined sites at Pd-TiO 2 may further enhance the oxygen activation. As the species adsorption and activation are strongly correlated with electron density, the performance of Pd-TiO 2 in CO oxidation turns out to depend on the TiO 2 thickness, which determines the number of transferred electrons, within a certain range (<1.8 nm). This work provides a new strategy for enhancing catalytic performance through tailoring charge densities in hybrid catalysts.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Dan Wang,Ying Chen,Yang Zhang,Xintong Zhang,Norihiro Suzuki,Chiaki Terashima
Extremely rapid high temperature annealing (ER-HTA) was used to boost the photoelectrochemical (PEC) performance of hematite thin film deposited on a TiO 2 nanosheet-modified SnO 2 :F substrate (FTO-TN-HM). The PEC performance of FTO-TN-HM photoanodes were strongly enhanced with increasing ER-HTA temperatures from 700 to 820 °C with a holding time as short as 30 s. The photocurrent density of FTO-TN-HM photoanode treated by ER-HTA at 800 °C was 0.49 mA cm -2 and interfacial hole transfer efficiency of 32% was achieved at 1.23 V vs. RHE, which were 18.8 and 16 times as great as FTO-TN-HM photoanodes annealed at 500 °C for 30 min, respectively. The effect of ER-HTA on the PEC performance of FTO-TN-HM photoanodes were studied comparatively, which suggested that the improved crystallinity, decreased recombination through surface states, and enhanced interfacial Ti 4+ diffusion all contributed to their advanced PEC performance. Our studies confirm that the ER-HTA treatment is an effective method to improve the PEC properties of hematite photoanodes with TiO 2 underlayer and might be applicable for other semiconducting photoelectrodes to get better PEC performance.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2015
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IF 6.723
Zichao Lian,Pengpeng Xu,Wenchao Wang,Dieqing Zhang,Shuning Xiao,Xin Li,Guisheng Li
Fullerene (C60) enhanced mesoporous CdS/TiO2 architectures were fabricated by an evaporation induced self-assembly route together with an ion-exchanged method. C60 clusters were incorporated into the pore wall of mesoporous CdS/TiO2 with the formation of C60 enhanced CdS/TiO2 hybrid architectures, for achieving the enhanced photostability and photocatalytic activity in H2 evolution under visible-light irradiation. Such greatly enhanced photocatalytic performance and photostability could be due to the strong combination and heterojunctions between C60 and CdS/TiO2. The as-formed C60 cluster protection layers in the CdS/TiO2 framework not only improve the light absorption capability, but also greatly accelerated the photogenerated electron transfer to C60 clusters for H2 evolution.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
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2018
·Vol. 8
·期 6
·415
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IF 3.504
Wei Li,Hao Ding,Hua Ji,Wenbin Dai,Jianping Guo,Gaoxiang Du
A photocatalytic active CdS-TiO2heterostructure composite was prepared by hydrothermal method and its morphology and properties were characterized. Results indicate that the CdS nanoparticles deposited on the surface of a TiO2nanoparticles, which was in anatase phase. The particle scale of both of the components reached approximately 15 nm. In comparison to pure TiO2(410 nm), the light absorption edge of the heterostructure composite was 550 nm, which could extend the light response from UV to the visible region. Under visible light irradiation, the degradation efficiency of tetracycline hydrochloride by the CdS-TiO2composite achieved 87.06%, significantly enhancing photocatalytic activity than the as-prepared pure TiO2and commercial TiO2(Degussa P25). This character is attributed to the synergetic effect of these two components in the absorption of visible light.Keywords:CdS-TiO2heterostructure composite;photocatalyst;tetracycline hydrochloride
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Renquan Guan,Lijing Wang,Dandan Wang,Kexue Li,Huaqiao Tan,Yunning Chen,Xueying Cheng,Zhao Zhao,Qingkun Shang,Zaicheng Sun
The Coulomb interactions between excited electrons and holes have a very important influence on the photophysical processes in 2D semiconductors. Exciton dissociation is one of the key steps that significantly contribute to the efficiency of photocatalysis, but its research in the relevant aspects of photocatalysis has not been in-depth. Herein, the BP/TiO 2 heterojunction as a prototypical model system was constructed on the surface of urchin-like TiO 2 where black phosphorous (BP) quantum dots (QDs) grew. The BP/TiO 2 heterojunction exhibits an improved H 2 -production rate of 112 μmol·h −1 ·g −1 under UV–visible light irradiation without any cocatalysts, which is 2.4 times higher than that of pure TiO 2 (47 μmol·h −1 ·g −1 ). As a typical exciton-rich material, BP QDs have special advantages on the charge separation process, because of their prominent many-body effect, short carrier transport distance, and large specific surface with rich reactive sites. The energy difference between the conduction bands turns out to be the driving force for exciton dissociation in the BP/TiO 2 heterojunction. The theoretical calculation implies that the excited electron tends to transfer from BP QD to TiO 2 . The high catalytic performance of heterojunction contributes to the effective exciton dissociation, interfacial charge separation, and charge-carrier accumulation. This work lays the foundation for the design of the BP QDs based photocatalytic system and its application in photocatalytic hydrogen production and provides an effective reference for increasing the active sites of heterojunctions.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
International Journal of Environmental Research and Public Health
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2023
·Vol. 20
·期 4
·3437
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IF 4.614
Fan Zhao,Yini Chen,Shiyang Zhang,Meng Li,Xinhua Tang
A three-dimensional (3D) anode is essential for high-performance microbial fuel cells (MFCs). In this study, 3D porous carbon monoliths from a wax gourd (WGCM) were obtained by freeze-drying and carbonization. Nano-TiO2was further coated onto the surface of WGCM to obtain a nano-TiO2/WGCM anode. The WGCM anode enhanced the maximum power density of MFCs by 167.9% compared with the carbon felt anode, while nano-TiO2/WGCM anode additionally increased the value by 45.8% to achieve 1396.2 mW/m2. WGCM enhancement was due to the 3D porous structure, the good conductivity and the surface hydrophilicity, which enhanced electroactive biofilm formation and anodic electron transfer. In addition, nano-TiO2modification enhanced the enrichment ofAcinetobacter, an electricigen, by 31.0% on the anode to further improve the power production. The results demonstrated that the nano-TiO2/WGCM was an effective anode for power enhancement in MFCs.Keywords:microbial fuel cells;anode;carbon monolith;nano-TiO2;Acinetobacter
研究领域:
环境科学
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微生物学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2017
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IF 3.582
Bingfeng Liu,Yaruo Jin,Zhijiang Wang,Defeng Xing,Chao Ma,Jie Ding,Nanqi Ren
In order to strengthen photo-fermentative hydrogen production by different photocatalytic nanoparticles , hydrogen production by photo-fermentative bacteria with addition of TiO 2 , ZnO and SiC nanoparticles in batch culture were investigated in this study. The results indicated that three nanoparticles could improve hydrogen production performance of Rhodopseudomonas sp. nov. strain A7 under respective optimal conditions. The hydrogen yield of 2.81 mol-H 2 /mol-acetate was obtained when TiO 2 nanoparticles with a concentration of 300 mg/L and size of 25 nm. The concentration of ZnO nanoparticles was at 100 mg/L, hydrogen yield reached 2.64 mol-H 2 /mol-acetate. Compared with TiO 2 and ZnO nanoparticles, SiC nanoparticles exhibited greatest potential for enhancing photo-hydrogen production. By addition of nano-SiC with concentration of 200 mg/L which was prepared at temperature of 1500 °C, the maximum hydrogen volume, average hydrogen content and hydrogen yield of strain A7 were achieved at 2272 mL-H 2 /L-culture, 85.2% and 2.99 mol-H 2 /mol-acetate, respectively. And hydrogen production was 18.6% higher than that of alone strain A7 without the addition of nanoparticles. Therefore, the addition of SiC nanoparticles is a promising strategy to improve photo-fermentative hydrogen production from wastewater.
研究领域:
微生物学
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环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Qianqian Li,Hairong Yue,Changjun Liu,Kui Ma,Shan Zhong,Bin Liang,Siyang Tang
Transformation from photocatalytic oxidative dehydrogenation of ethane (PODHE) to photocatalytic dehydrogenation of ethane (PDHE) is an attractive process. A series of Pd/TiO 2 photocatalysts with different Pd loading amount were synthesized by photochemical deposition. And the Pd particle sizes varied from 1 nm to 4 nm. PDHE happened instead of POHDE over Pd particles smaller than 3 nm. The best PDHE performance (H 2 , 799.4; C 2 H 4 , 614.9, in micromoles per gram of catalyst) was obtained over 0.5 wt.% Pd/TiO 2 catalyst. And it was 3 times of it of PODHE over 1 wt.% Pd/TiO 2 . Reducing the Pd particle size of Pd/TiO 2 would increase Pd 0 /Pd 2+ and lower the valence band and conductive band of Pd/TiO 2 , which affect the catalytic behaviors. Detailed formation of products was investigated in this work.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Wenbo Cui,Sha Luo,Haoqiang Hou,Zhenwei Wu,Bang An,Mingcong Xu,Chunhui Ma,Shouxin Liu,Wei Li
Using cellulose nanocrystals (CNCs) as a template in the production of TiO 2 has a positive impact on its crystal and porous structure, ultimately improving its photocatalytic performance. In this study, TiO 2 photocatalysts with mesoporous anatase structures were prepared by acid-catalyzed hydrolysis using sulfate-ester-modified CNCs as the template. The effects of CNC concentration on the structure and performance of TiO 2 were investigated in detail. The addition of CNCs was found to inhibit TiO 2 transformation from the anatase to rutile phase, and abundant hydroxyl and sulfate ester groups on the CNCs provide narrow confined spaces for the crystal growth of TiO 2 , leading to the generation of smaller crystals with more exposed (001) crystal faces. Moreover, the CNCs act as a template for the pore structure remaining after calcination, thus increasing the specific surface area of the TiO 2 . Among the numerous samples evaluated, that prepared with a CNC concentration of 0.15 wt% and calcined at 600 °C had the highest percentage of (001) crystalline surface exposure. In photodegradation tests using phenol as a model pollutant, a degradation rate of 97.4 % and mineralization rate of 79.9 % were achieved with 60 min of light exposure. Thus, this study provides a clear approach for the directional synthesis of mesoporous TiO 2 from biomass template materials.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）