JOURNAL OF CATALYSIS
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2024
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IF 6.5
Zhenyu Liu,Min Luo,Yue Cao,Linghu Meng,Yang Yang,Xiaoman Li
Doping elements in photocatalysts is a reliable strategy for efficiently utilizing solar energy. Herein, we reported the successful synthesis of S-doped Bi 2 MoO 6 (S-BMO) through a facile one-step solvothermal method utilizing Na 2 S as a sulphur source. By systematically adjusting the doping concentration of S 2- ion, it was found that when the optimal doping amount of Na 2 S was 0.7 %, the obtained photocatalyst showed a photocatalytic nitrogen fixation rate of 122.14 μmol·h −1 ·g cat -1 under visible light irradiation for 1 h, which was 3.67 times better than Bi 2 MoO 6 (BMO). Density Functional Theory (DFT) calculations demonstrated that S partially substituted O in Bi-O-Mo in S-BMO and also modulated the electronic structure of BMO. The photoreduction ability was enhanced due to the upshift of the conduction band (CB) energy level from −0.6 to −0.72 eV after S doping. This work may provide a promising method for efficient photocatalytic nitrogen fixation by doping BMO with non-metallic elements.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liyuan Duan,Guoqiang Li,Shuting Zhang,Hongyu Wang,Yongle Zhao,Yongfa Zhang
In this study, graphitized carbon nitride photocatalysts were successfully prepared by using the desulfurized waste liquid extracting salt from coking plants. The NO x removal efficiency of g-C 3 N 4 synthesized using ammonium thiocyanate (NH 4 SCN), ammonium thiosulfate ((NH 4 ) 2 S 2 O 3 ) and ammonium sulfate ((NH 4 ) 2 SO 4 ) with different mass ratios were evaluated. The results showed that due to the addition of (NH 4 ) 2 S 2 O 3 and (NH 4 ) 2 SO 4 a large amount of sulfur-containing gas was released during pyrolysis, which significantly increased the specific surface area and pore volume of the photocatalysts. The release of sulfur-containing gas also resulted in the incorporation of sulfur, and due to this doping process the band gap of the photocatalyst was widened to 2.94 eV, thus enhancing its visible light response. C vacancies were formed in the hepazine ring, which increased the electron density around the N–(C) 3 bridge bond and formed an electron trapping center, thus inhibiting the recombination of charge carriers. The photocatalysts had increased O 2 adsorption capacity and increased number of amino groups on their surface. This facilitated the rapid generation and consumption of reactive oxygen species, inhibited the accumulation of NO 2 on the surface, reduced the production of NO 2 , thus improving the NO x removal efficiency of the photocatalysts. The principle of using “waste for waste control” was achieved, and a new method for nitrogen oxide removal was provided.
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
高影响因子
Advanced Energy and Sustainability Research
·
2022
·Vol. 3
·期 12
·2200138
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IF 0
Linlin Zhang,Lu Liu,Xiaodong Zhang,Chengjun Ge,Jianjun Liao
Pharmaceuticals and personal care products (PPCPs) have attracted widespread attention due to their durability to the environment. Therefore, it is highly desirable to develop new technologies that are environmentally friendly, energy saving, and compatible to degrade these pollutants. In this study, a vis–NIR-driven and highly efficient S-scheme photocatalyst, WO 3− x /S doped g-C 3 N 4 , is used for PPCPs degradation. The results show that the photocatalytic activity of WO 3− x /S doped g-C 3 N 4 composite system for PPCPs is much higher than that of WO 3− x and g-C 3 N 4 . The introduced WO 3− x has a great positive effect on the photocatalytic performance of WO 3− x /S doped g-C 3 N 4 S-scheme composite photocatalyst for both naproxen and diclofenac. Due to the fast photogenerated carrier separation brought by the S-scheme, the WO 3− x /S-doped g-C 3 N 4 nanocomposite exhibits enhanced performance in photocatalytic PPCPs degradation. The degradation rate of naproxen is 99.2%, and the degradation rate of diclofenac can also be as high as 99.5%. This research has important reference value for the synthesis of WO 3 -based S-scheme photocatalysts for energy and environmental applications.
研究领域:
环境科学
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材料科学
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DOI
ACS Applied Nano Materials
·
2019
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IF 0
Runjiang Guo,Ran Tian,Dongliang Shi,Hua Li,Hezhou Liu
Nowadays, obtaining photocatalysts with a narrow band gap that can degrade contamination under visible light has been a hot topic in the field of environmental protection. In this report, the S-doped hierarchically structured ZnSnO3 with a high S doping ratio, a narrow band gap, and a large specific surface area is synthesized via a two-step hydrothermal method. ZIF-8 was used as the Zn source to synthesize ZnSnO3 with a hollow structure for the first time. Characterization techniques to confirm doping by S in the ZnSnO3 structure include the use of X-ray photoelectron and energy-dispersive spectroscopies. Owing to the hollow-structured ZnSnO3 precursor, S-doped ZnSnO3 demonstrated a large specific surface area (up to 80.63 m2/g) that is favorable for the strong adsorption of reactants. In addition, the S-doping ratio is as high as 90%, which is much higher than that of other related work. Because of the elevated S 3p energy level, the band gap of S-doped ZnSnO3 is rapidly decreased from 3.7 to 2.4 eV, which gives S-doped ZnSnO3 a higher efficiency in the utilization of visible light. Because of the enhanced adsorption capabilities and decreased band gap, the as-synthesized nanocomposite can be used as a high-efficiency photocatalyst for wastewater treatment. About 36% rhodamine B (RhB) is absorbed by S-doped ZnSnO3 even before 350 W Xe-lamp irradiation. After being irradiated under visible light for about 80 min, the RhB is almost completely degraded (degradation efficiency ≈90%) using S-doped ZnSnO3, which is much faster than using pure ZnSnO3 or other zinc–tin oxide-based photocatalysts. In this report, detailed discussions are also given for the synthesis process of hollow-structured ZnSnO3 and the mechanism of narrowing the band gap via S doping.
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
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Weixuan Zeng,Yuan Bian,Sheng Cao,Anquan Zhu,Lulu Qiao,Yongjin Ma,Pengfei Tan,Quanyin Ma,Rui Dong,Jun Pan
Visible light-driven photocatalytic hydrogen production has been deemed a potential means to solve the increasingly serious energy shortage problem. Herein, two dimensional (2D) Sr 2 Ta 2 O 7 /S-doped g-C 3 N 4 nanocomposites that applied in photocatalytic water reduction were fabricated through thermal condensation of thiourea with hydrothermal-prepared Sr 2 Ta 2 O 7 . The resulted Sr 2 Ta 2 O 7 /S-doped g-C 3 N 4 nanocomposite exhibited enhanced hydrogen evolution rate (11.36 μmol g −1 h −1 ) under visible light irradiation, which is about 3.5 times higher than that of pure S-doped g-C 3 N 4 . In light of the UV–vis diffuse reflectance spectroscopy, Mott-Schottky curve and photoluminescence spectra, the enhanced photocatalytic performance could be mainly attributed to the conduction band difference between Sr 2 Ta 2 O 7 and S-doped g-C 3 N 4 . In addition, transient photoluminescence spectra, electrochemical impedance spectra and photocurrent responses proved that the presence of Pt cocatalyst also plays an important role in facilitates the transport of photoexcited electron-hole pairs, subsequently promoting the photocatalytic performance.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2022
·Vol. 414
·期 24
·7253-7263
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IF 4.478
Mei Xiping,Wang Dongxiu,Wang Songbai,Li Junfen,Dong Chuan
In this paper, intrinsic dual-emission fluorescent carbon dots (CDs) doped with N and S atoms have been firstly fabricated. The characterization results show that CDs are successfully synthesized with two separate fluorescence emissions at 468 nm and 628 nm, respectively. The strong and selective interaction of Cr (VI) ions with CDs lead to obvious fluorescence decrease of CDs at 468 nm, which is caused by a mixed quenching mechanism. At the same time, the fluorescence at 628 nm increase. Interestingly, the CDs solution show obvious color change under the daylight and UV light, so visualization detection of Cr (VI) can be realized in water samples. Based on the data of the emission intensity ratios of F 468 / F 628 , Cr (VI) can be detected from 3.8 to 38.9 μM combined with the linear correlation coefficient of 0.998, and the lowest detection concentration is 47.2 nM. The platform is satisfactorily applied to the detection of Cr (VI) ions in water samples. In addition, the CDs could be applied as fluorescent probes for cell imaging with dual fluorescent emission. Graphical abstract
研究领域:
材料科学
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分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Lei Guo,Lei Zhu,Savaş Kaya,Rui Sun,Alessandra Gilda Ritacca,Kai Wang,Jun Chang
Mild steel is a versatile, inexpensive, highly flexible, and easily weldable material widely used in construction, pipelines, transportation, shipping, and other industries. However, it is also extremely susceptible to corrosion processes under the influence of weather phenomena, posing a significant threat to society and human health. In this work, we investigated the corrosion inhibition capacity of a new type of N, S codoped carbon dots (N, S-CDs) on Q235 carbon steel in the acidic medium. The goal product was synthesized by hydrothermal method using o-phenylenediamine and amidinothiourea as precursors. Combined with electrochemistry, Fourier transform infrared (FTIR) spectroscopy, scanning electrochemical microscopy (SECM), and theoretical calculations, the inhibition properties of N, S-CDs on Q235 carbon steel in HCl solution were evaluated. The potentiodynamic polarization (PDP) curves and electrochemical impedance spectroscopy (EIS) results indicated that the corrosion inhibition efficiency reached 90.3 % and 92.4 % at 100 mg/L concentration, respectively. Indeed, the presence of N, S-CDs reduced the electric double-layer capacitance, increased the thickness of the adsorption film on the carbon steel surface, and reduced the corrosion current density, resulting in a delay of corrosion. X-ray photoelectron spectroscopy (XPS) analysis and surface characterization confirmed the successful doping of N, S and the formation of adsorption films, the Langmuir adsorption isotherm also confirmed the superior inhibition of N, S-CDs on the surface of Q235 carbon steel through physical and chemical adsorption mechanisms. At the same time, quantum chemical calculations and molecular dynamics (MD) simulations revealed its inhibition mechanism at the molecular/atomic level.
研究领域:
材料科学
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电化学
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表面科学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
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IF 6.3
Huda D. Abdul kader,Saad H. Ammar,Waqar A. Abdulnabi,Zaid H. Jabbar,Haidar Taofeeq,A. Al-Farraji
The development of new and effective photocatalytic heterojunctions for green environmental remediation under visible-illumination has received great attention in recent years. Herein, we assembled BiVO 4 -decorated S-doped g-C 3 N 4 (BVO/SCN) heterojunctions with different BVO:SCN ratios (5 to 30 wt% BVO) to achieve effective photocatalytic heterojunctions for visible-light-prompted degradation of antibiotic TC in a three-phase split-plate airlift photocatalytic reactor, in which successfully reducing charge recombination rate. Obviously, BVO/SCN endorsed greater photodecomposition performance of TC under visible-light (decompose 95.7 % of TC in 60 min), which compared to SCN was approximately 5-times enhancement. The TC mineralization efficiency of BVO/SCN hybrid (84 % within only 60 min) was higher than that of the individual BVO and SCN. The efficient internal self-mixing generated in the airlift photocatalytic reactor greatly contributed to increasing the TC degradation efficiency by improving the mass transfer and the irradiation process of the mixture, in which the degradation efficiency increased from 88 % without airlift to 95.7 % in airlift reactor. On the other hand, the high degradation efficiency was credited to the extended absorbing of visible-light and great separation of photo-prompted carriers through the formation of Z-type heterojunction between BVO and SCN. As recorded by the trapping investigates, the • O 2 − and • OH radicals act as the main reactive-species in the TC photocatalytic degradation process. Moreover, High durability of the developed BVO/BCN heterojunctions was obtained, in which 89.4 % TC degradation was still recorded after five rounds.
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
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
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IF 5.4
Yue-Jie Bai,Li-Ying Liu,Xun-Kai Duan,Guang-Xuan Zhang,Chao Wang,Xin-Yu Zhou,Changhao Wang,Bing-Rong Wang,Xiao-Lin Wei,Ru-zhi Wang
To further develop sensing materials for NO 2 gas detection practical application, the operating temperature of the sensor should be significantly reduced. In this paper, In 2 O 3 flowers were prepared by the microwave-assisted hydrothermal method . Then, In 2 O 3 was doped using TAA (thioacetamide). The prepared S-doped In 2 O 3 flowers have good gas sensitivity and significantly reduced operating temperature. When exposed to 10 ppm NO 2 gas, the corresponding response was 250 at 118 °C. It can be demonstrated by the first principle calculations, in which the doping of S atoms changes the electron structure of In 2 O 3 from semiconductor to metal with a lower potential barrier. Then, significantly affects the electron crossing the intergranular potential barriers. Therefore, the operating temperature of the sensor can be reduced. Our research results will provide new research ideas and technical approaches for designing, fabricating, and applying a new generation of In 2 O 3 gas sensors.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 7
·期 4
·914-921
·
IF 3.975
Weiyuan Guo,Kang Ding,Shixiong Mei,Xingxing Li,Xiaoyu Feng,Siguang Guo,Jijiang Fu,Xuming Zhang,Biao Gao,Kaifu Huo,Paul K. Chu
Graphical Two for the price of one : Hollow spheres consisting of in situ generated SnS nanosheets (SnS@C HSs) conformally coated with S-doped carbon are fabricated using polystyrene spheres as the self-sacrifice template and carbon source. Thanks to the unique structure, the SnS@C HSs exhibit excellent performance for both lithium- and sodium-ion batteries. Although tin sulfide is a promising anode material for lithium- and sodium-ion batteries due to the layered structure and high theoretical capacity, the large volume expansion and poor kinetics have seriously hindered further development and application. In this work, hollow spheres consisting of in situ generated SnS nanosheets (SnS@C HSs) conformally coated with S-doped carbon are fabricated using polystyrene spheres as the self-sacrifice template and carbon source. The SnS@C HSs with a large SnS interlayer distance, S-doped carbon matrix, and hollow structure not only relieve the pressure caused by volume expansion during cycling, but also promote fast transfer of lithium/sodium ions leading to a high pseudocapacitance. The SnS@C HSs have excellent electrochemical properties in both LIBs and SIBs such as high capacity, high rate, and outstanding cycling stability. The use of a self-sacrifice template is demonstrated to be a convenient and efficient strategy to design and prepare carbon-coated metal hollow spheres for efficient energy storage and conversion.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Yue Song,Bing Yang,Ziyu Ma,Yang Song,Jianbo Sun
Development research as a NO 2 gas sensor has attracted extensive attention recently. However, how to improve the electrical conductivity of materials, adjust the band structure of materials through photoexcitation and improve the carrier lifetime is still a challenge. In this work, an S-doped In 2 O 3 structure (S x /In 2 O 3−x ) was synthesized by enforcing the simple hydrothermal method . Doping directly controls the distribution of structural defects and oxygen vacancies in the material structure, and the response to NO 2 increases by orders of magnitude under photoexcitation. Various structural characterization techniques examined the properties of the S x /In 2 O 3−x -based material. More specifically, its electro-optical properties and the impact of S doping on its energy band structure were thoroughly analyzed to investigate the origins of the enhanced responsivity .
研究领域:
材料科学
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传感器技术
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环境监测
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lijuan Chen,Yaoyong Dong,Mengwei Han,Ting Song,Xuejun Zheng,Wenyuan He,Bei Long,Xiongwei Wu,Yong Pei,Xianyou Wang
MnOOH is regarded as a product of manganese-based materials after H + insertion. There is rare study on the Zn 2+ /H + storage capability of MnOOH. Herein, MnOOH nanofibers are prepared through a one-step hydrothermal method and developed as a promising cathode. The introduction of S doping changes the crystal structure of MnOOH and is conducive to its electronic/ionic transport and structural stability, proven by density functional theory calculations and various characterizations. The reduced Zn 2+ diffusion barrier of S-doped MnOOH leads to its increased Zn 2+ storage capability in the test of rate capability, especially at large current density. The Zn 2+ /H + insertion-type mechanism of MnOOH is revealed by ex situ XRD, Raman, XPS, and SEM tests. Therefore, this optimized material delivers a high reversible capacity of 178 mAh g −1 at 0.1 A g −1 , a good rate capability of 50 mAh g −1 at 3.0 A g −1 , and a long cyclic life with 108 mAh g −1 at 0.5 A g −1 over 500 cycles. Moreover, the electrode still shows satisfactory rate capability and cyclic life even at the high mass loadings of 10 and 15 mg cm −2 . This work proves the Zn 2+ /H + storage capability of MnOOH and its potential as a high-performance cathode in aqueous zinc ion battery.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）