Advanced Materials Interfaces
·
2025
·
IF 4.4
Chengguang Lang,Lei Zhang,Cheng-Jie Yang,Hanwu Dong,Hao Zhong,Chung-Li Dong,Jun Chen,Aijun Du,Yi Jia,Liuzhang Ouyang,Xiangdong Yao
Solid-state hydrogen storage materials with optimal binding energy are essential for hydrogen storage and transportation applications and pose long-standing challenges. Current technologies, including molecular physisorption materials (e.g., metal–organic frameworks (MOFs), carbon nanotubes (CNTs), activated carbons (ACs)) and atomic chemisorption materials (e.g., MgH 2 , LiBH 4 , NH 4 BH 4 ), fall short of meeting practical application requirements. Therefore, designing and constructing new solid-state hydrogen storage materials at the atomic level is critically important. In this study, the use of defect engineering is explored to modulate hydrogen adsorption sites on TiO 2 surfaces. The results demonstrate that low-coordinated titanium (Ti) atoms on TiO 2 can serve as effective hydrogen adsorption sites, storing hydrogen through molecular chemisorption with significantly enhanced adsorption energy compared to Ti atoms in high coordination states. Moreover, the adsorbed hydrogen remains in molecular form, facilitating easy desorption at room temperature, unlike titanium hydride, which requires high temperatures for desorption. This approach provides a promising pathway for developing efficient hydrogen storage materials by leveraging the unique properties of low-coordinated Ti atoms on TiO 2 surfaces.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Mohammadreza Rostami,Biao Yang,Xiaochuan Ma,Sifan You,Jin Zhou,Meng Zhang,Xuefeng Cui,Haiming Zhang,Francesco Allegretti,Bing Wang,Lifeng Chi,Johannes Barth
n-Armchair graphene nanoribbons (nAGNRs) are promising components for next-generation nanoelectronics due to their controllable band gap, which depends on their width and edge structure. Using non-metal surfaces for fabricating nAGNRs gives access to reliable information on their electronic properties. We investigated the influence of light and iron adatoms on the debromination of 4,4”-dibromo-p-terphenyl precursors affording poly(para-phenylene) (PPP as the narrowest GNR) wires through the Ullmann coupling reaction on a rutile TiO2(110) surface, which we studied by scanning tunneling microscopy and X-ray photoemission spectroscopy. The temperature threshold for bromine bond cleavage and desorption is reduced upon exposure to UV light (240-395 nm wavelength), but the reaction yield could not be improved. However, in the presence of codeposited iron adatoms, precursor debromination occurred even at 77 K, allowing for Ullmann coupling and PPP wire formation at 300-400 K, i.e., markedly lower temperatures compared to the conditions without iron adatoms. Furthermore, scanning tunneling spectroscopy data reveal that adsorbed PPP wires feature a band gap of ≈ 3.1 eV.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Xiaotong Gu,Ning Qin,Guangfeng Wei,Yiqiong Hu,Ya-nan Zhang,Guohua Zhao
It is stubborn to remove the lowly concentrated phthalic acid esters (PAEs) that usually coexist with other highly concentrated but low-toxic pollutants in municipal sewage. Herein, we report a novel strategy for completely removing the PAEs over a bi-functional {001}TiO 2 surface (with highly exposed {001} facet), which not only serve as functional sites to specifically adsorb the target PAEs pollutants, but also contribute to an enhanced oxidation ability. The adsorption behavior of PAEs on {001}TiO 2 is analyzed deeply through kinetic experiments combining with in situ ATR-FTIR spectroscopy and theoretical calculations. The results reveal that the adsorption capacities of PAEs on {001}TiO 2 are about 4–5 times higher than that on TiO 2 , both of which follow the pseudo-second-order and Langmuir model. This is mainly attributed to the interfacial Lewis Acid-Base Pair between {001} facet Ti 5c sites and C O of PAEs. Benefitting from the specific adsorption capability toward target pollutant and enhanced oxidation ability of {001} facets, nearly 100% of DMP or DEP in simulated wastewater can be eliminated by {001}TiO 2 within 2 h illumination, and the relevant degradation rate constants ( k ) (3.67 h −1 for DMP and 2.19 h −1 for DEP) are 5.73 and 3.08 folds higher than that of pure TiO 2 , respectively. In the application of municipal wastewater , nearly 76% of DMP and 85% DEP can be eliminated by {001}TiO 2 within 2 h illumination, which are nearly 3–6 fold higher than that of pure TiO 2 .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 9
·2209-2218
·
IF 5.6
Suyan Li,Xiaoyu Hu,Yubo Li,Meiying Wang,Yu Chen,Manman Mu,Lijun Zhang
As a green and sustainable energy technology, converting solar energy into hydrogen peroxide (H2O2) chemical energy has become one of the key research fields of photocatalysis. It has been reported that TiO2 has reached an excellent H2O2 productivity of 3.3 mM h−1, and, therefore, there is value in using it for further research. Herein, a novel method for repairing and improving the surface of TiO2 was developed using small organic molecules that can enter the nanopores of TiO2 to form C, N, and O co-doped graphite-like hybrid structures. Thus, efficiently and conveniently, a multifunctional dihydropyridine with an electron-donating hydroxyl substituent successfully conducted thermally induced intermolecular condensation and subsequent in situ graphitization, resulting in efficient regulation of surficial properties. The results show that hybrid species enhanced the separation and transmission of photogenerated charges, reduced the photocatalytic effect for the decomposition of H2O2, and provided an effective channel for photocatalytic H2O2 synthesis. Under xenon lamp illumination, an initial rate of 10.22 mmol (h g)−1 H2O2 was obtained, which exceeded that for all previously reported catalysts. In addition, ACMD successfully increased the light utilization efficiency of nano-TiO2, with an apparent quantum efficiency (AQE) of 24.5% at 365 ± 5 nm and a solar-to-chemical conversion (SCC) efficiency of 2.18% under irradiation above 300 nm. Its visible light performance was significantly improved to afford 3.12 mmol (h g)−1 H2O2 with an SCC of 1.17% under irradiation greater than 420 nm. Because of the diversity of such organic molecules, this method provides researchers with many opportunities to further optimize hybrid species on the surface of TiO2, and, therefore, it is significant for the development of photocatalysts.
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
Surfaces and Interfaces
·
2023
·
IF 6.2
Jie Jiang,Yuqiang Ding
As a widely used semiconductor photocatalyst , TiO 2 has been explored in organic compounds hydrogenation. In this study, the hydrogenation of C=N bonds on the surface of TiO 2 was accomplished for the first time utilizing Cu 2 O/TiO 2 type-II (p-n) heterojunction . The probe reactions, hydrogenation of N -benzylphenylamine with benzyl alcohol, and N -methylation of amines with methanol exhibited that the hydrogenation of C=N bonds on TiO 2 surface can be achieved through borrowing hydrogen reaction (BH, alcohols as hydrogen source). Additionally, the BH reaction rate could be improved by adding external H + to the reaction system. The catalytic activity of Cu 2 O/TiO 2 was discovered to remain at an efficient level even after six reaction cycles.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Chengchao Liu,Yu He,Liang Wei,Yanxi Zhao,Yuhua Zhang,Fuzhen Zhao,Shuai Lyu,Sufang Chen,Jingping Hong,Jinlin Li
A series of surface-modified TiO2 samples (Al-TiO2, Si-TiO2, and C-TiO2) with similar physical properties were synthesized. Comparison of the profound effect of different interfaces of the Co catalyst on the activity and stability in Fischer–Tropsch synthesis was investigated. Al2O3 or SiO2 nanoshell-modified TiO2 enhances the cobalt dispersion (Co/Al-TiO2) or reducibility (Co/Si-TiO2), which results in an increased cobalt-time-yield (CTY) of the catalysts. Hydrothermal carbon (HTC) shell modified TiO2 can simultaneously promote cobalt nanoparticle dispersion and reducibility. Accordingly, compared with the reference Co/TiO2 catalyst, the CTY and C5+ selectivity of Co/C-TiO2 is remarkably improved. Furthermore, the Co/C-TiO2 catalyst shows more stabilized activity under harsh FTS reaction conditions (230 °C, 1.0 MPa, CO conversion over 60%). This stable catalysis is attributed to the interfacial site (Co-TiO2), with the strength of the metal–support interaction resulting from the autoconsumption of the HTC layer during the reduction and reaction processes.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Feng Long,Xincheng Cao,Xia Jiang,Peng Liu,JianChun Jiang,Xiaolei Zhang,Junming Xu
Catalyst design is critical for renewable selective hydrogenation of fatty acids into alkanes or alcohols, especially for active metals and supports. We demonstrate that NiCu anchored on a TiO2 (P25) surface, prepared by the impregnation method, performed superior temperature-sensitive catalytic activities with a higher fatty alcohol yield of 78.2% (205 °C, 4 MPa H2, and 12 h) and alkane yield of 85.0% (245 °C, 3 MPa H2, and 6 h). X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) suggest that Ni or NiCu anchored on rutile with oxygen vacancies can achieve reversal of charge transfer between the metal and TiO2 support. Especially, the normal NiCu cluster loading on the rutile surface can improve the dispersion of the NiCu cluster and oxygen vacancy concentration. Thus, more NiCu clusters anchored on oxygen defects can obtain negative charges in favor of alcohol production. In contrast, the other active NiCu clusters will preferentially cleave the C–C bond to produce alkanes at a higher reaction temperature. Our work provides a new strategy for designing highly effective hydrogenation catalysts.
研究领域:
催化化学
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2022
·
IF 5.141
Jinping Zhang,Haijun Chen,Meijiang Liu,Tianliang Lu,Beibei Gao,Xiaomei Yang,Lipeng Zhou,Hongji Li,Yunlai Su
Surface charge-transfer complex formed by TiO 2 and phenols has showed a great potential in visible-light photocatalysis. However, back electron transfer limits the charge transfer efficiency and the activation of phenols in surface complex. Herein, we disclosed the efficient activation of phenols in surface complex by introducing the base. Both homocoupling reactions and butylated hydroxytoluene-trapped experiments clearly demonstrated the generation of phenolic radicals from various lignin-derived substrates. The addition of base caused the blue-shifted absorption of surface complex, while increased the visible light-induced electron excitation from substrate to TiO 2 . Vibrational spectra suggested that the interaction between phenolate and TiO 2 was stronger than the interaction between neutral phenol and TiO 2 . This base-triggered strategy may be conducive to useful transformations or degradation of phenols via surface complex.
研究领域:
材料科学
·
光催化
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）