JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2015
·Vol. 308
·期 3
·865-875
·
IF 1.034
Zhang Hui,Xue Jinhua,Hu Nan,Sun Jing,Ding Dexin,Wang Yongdong,Li Le
The adsorption of U(VI) from low concentration solution by HKUST-1@H 3 PW 12 O 40 was studied as a function of various experimental parameters including pH, interfering ions, contact time, initial uranium concentration and temperature by batch experiments. Equilibrium data were found to fit with Langmuir isotherm model better than Freundlich isotherm model. The kinetic adsorption was fitted by the pseudo-second-order model well. Thermodynamic data from the adsorption experiments indicate that adsorption process is spontaneous and endothermic. HKUST-1@H 3 PW 12 O 40 can selectively adsorb U(VI) from multi-metal ion solutions and the adsorption capacity of HKUST-1@H 3 PW 12 O 40 don’t decrease significantly after three cycles of desorption-reuse. The results show that HKUST-1@H 3 PW 12 O 40 is suitable for removal of U(VI) from low concentration solutions.
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
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 26
·11042-11048
·
IF 3.288
Yi Yang,Qiu Zhang,Fengyan Li,Zhinan Xia,Lin Xu
This paper reports for the first time the preparation of Co3O4 nanorods by simple hydrothermal and annealing methods, which are doped with polyoxometalates that act as an intermediary in electronic transmission to accelerate electron transport. The designed H3PW12O40(PW12)/Co3O4–Cu2S composite film was prepared by the screen printing method to boost its efficiency as the counter electrode for quantum dot-sensitized solar cells, where the preparation process is simple and inexpensive. PW12/Co3O4–Cu2S (Jsc = 16.60 mA cm−2, Voc = 0.636 V, Rct = 0.32 Ω and FF = 0.436) shows better electrocatalytic performance compared to the original Co3O4 and Cu2S. Accordingly, the photoelectric conversion efficiency of PW12/Co3O4–Cu2S is 4.67%, which is 10%, 46%, 55.6%, and 72% higher than those of Co3O4–Cu2S (4.2%), Cu2S (2.54%), PW12/Co3O4 (2.07%), and Co3O4 (1.30%), respectively. Electrochemical impedance spectroscopy and Tafel measurements performed on two CE symmetric virtual cells proved the excellent electrocatalytic activity of PW12/Co3O4–Cu2S. Therefore, this composite film can be used as an alternative option for QDSSC counter electrodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yiting Lv,Kaiwen Huang,Meng Yuan,Jinjuan Xue,Mingxin Wang
In this study, a novel visible-light-driven PCN-222/H 3 PW 12 O 40 /graphene oxide@cotton cloth (PCN-222/HPW/GO@Cot) photocatalytic platform was developed for efficient water sterilization and purification. PCN-222/HPW/GO ternary photocatalyst was prepared via one-pot solvothermal method, and anchored onto cotton cloth though catechol-amine reaction. By introducing HPW as the quasi-semiconductor co-catalyst and efficient electron trap, the photocatalytic activity of PCN-222 was boosted. Besides, the addition of GO further enhanced electron transfer capability and photothermal properties. PCN-222/HPW/GO@Cot exhibited significantly improved organic dye photodegradation and sterilization efficiencies compared to PCN-222 and PCN-222/HPW coated cotton cloths. It also maintained consistent organic dye removal efficiency over reuse cycles and retained high sterilization activity after repeated washings, indicating its remarkable durability and coating stability. The band positions and the enhanced photocatalytic/photothermal mechanisms were investigated in depth. This research suggests the great potential of PCN-222/HPW/GO@Cot photocatalytic platform for practical water purification and sterilization applications, and the potential to become multifunctional textiles.
研究领域:
环境科学
·
材料科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 5
·3719-3727
·
IF 3.086
Weiming Xiao,Panpan Zhao,Shengjun Deng,Ning Zhang
H3PW12O40 (PW12) was hybridized with 3-aminopropyltriethoxysilane modified graphene oxide (GO–NH2) sheets using a facile impregnation method, for the removal of organic pollutants in water. The obtained hybrid (PW12/GO–NH2) was characterized by elemental analysis, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), transmission electron microscopy (TEM), and photo-electrochemical measurements. Its removal efficiency for organic pollutants was evaluated by the removal of methyl orange (MO). The results show that about 61.8% of MO is adsorbed onto the PW12/GO–NH2 hybrid upon 2 h of mixing, and after 2 h of irradiation under a high-pressure mercury lamp, MO is further decreased to 17.7%. The adsorption capacity of PW12/GO–NH2 hybrids is enhanced as compared with GO–NH2, probably due to enhanced electrostatic attraction and hydrogen-bonding interactions between the hybrid and MO. And the hybrid exhibits a better photocatalytic activity than the homogenous photocatalyst PW12 (1.36 times), which is probably attributed to the effective separation of photo-generated electron–hole pairs. Furthermore, the trapping experiment of active species during the photocatalytic degradation was carried out over PW12/GO–NH2, revealing that the oxidation of MO by O2˙− and ˙OH plays a major role in the photocatalytic degradation process.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 37
·12879-12887
·
IF 4.39
Tingting Zhang,Qiu Zhang,Yumeng Wang,Fengyan Li,Lin Xu
A low cost H3PW12O40 (PW12)/CoS2 complex is prepared and used as a counter electrode (CE) to combine with sandwich quantum dot sensitized solar cells (QDSSCs) composed of a TiO2/CdS/CdSe/ZnS photoanode and polysulfide electrolyte to study their photovoltaic properties via a simple hydrothermal method. Under standard simulated sunlight, the photoelectric conversion efficiency (PCE) of 2%PW12 (PW12-2/CoS2) doped CEs was 6.29%, which was significantly 67.7% higher than those of QDSSCs based on undoped CoS2 CEs (3.75%). Due to the introduction of PW12, the nanoparticles forming the hollow structure of CoS2 changed from regular octahedra to rough nanoparticles, which increase the active sites. At the same time, the work function of CoS2 decorated with PW12 is decreased. This study and discovery demonstrate that POMs can be used to optimize CE materials and improve the photoelectric conversion efficiency of QDSSCs, which provide an experimental and theoretical basis for subsequent investigations.
研究领域:
材料科学
·
能源科学
·
化学
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Rui Sun,Hongtao Li,Yudan Zhang,Junyi Hua,Wenxin Xu,Kexin Li,Huiqin Guo,Liushui Yan,Shenglian Luo
In this paper, BiOBr@H 3 PW 12 O 40 @BiOI heterostructure with honeycomb-like morphology is successfully constructed for the first time by a simple one-step solvothermal strategy. The introduction of H 3 PW 12 O 40 effectively improves the specific surface area and photon trapping ability of BiOBr@BiOI heterostructure. More importantly, the W 5d electron orbital of H 3 PW 12 O 40 , as an electron bridge, effectively improves the transmission efficiency of photogenerated electrons in the BiOBr@BiOI heterostructure, thus making the BiOBr@H 3 PW 12 O 40 @BiOI heterostructure show excellent performance in the photocatalytic oxidation or reduction reaction. Based on the macro-thermodynamic model proposed in our previous work and the active species capture experiments, the photocatalytic oxidation or reduction mechanism by using as-prepared BiOBr@H 3 PW 12 O 40 @BiOI heterostructure is discussed in detail.
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
JOURNAL OF MATERIALS RESEARCH
·
2016
·Vol. 31
·期 19
·3060-3068
·
IF 1.579
Li Wei,Li Tingting,Liu Ce,An Libao,Li Yuqing,Zhang Weiwei,Liu Lu,Zhang Zhiming
H 3 PW 12 O 40 /polymethylmethacrylate (PMMA)/polycaprolactam (PA6) nanofibrous membrane with a sandwich structure was prepared by electrospinning. Characterization with Fourier transformation infrared spectroscopy (FT-IR), energy-dispersive x-ray spectroscopy (EDX), and x-ray photoelectron spectroscopy (XPS) indicated that H 3 PW 12 O 40 has been successfully loaded into the upper and bottom layers of the sandwich membrane and its Keggin structure was not destroyed. The photocatalytic efficiency of the sandwich membranes were much higher (≥87.2%) than that of H 3 PW 12 O 40 only (15.6%) and H 3 PW 12 O 40 /PMMA composite nanofibrous membrane (11.6%) in the degradation of methyl orange (MO) under ultraviolet irradiation. It may be caused by two factors: one was the photoreduction mechanism induced by the electron donating from PA6 to H 3 PW 12 O 40 , the other was the double contact area between H 3 PW 12 O 40 and MO due to the sandwich structure of the laminated membrane. What is noteworthy is that the sandwich membranes were stable in water, so that they could be easily separated from the aqueous MO solution and reused without appreciable losses in photocatalytic activity after three photocatalytic cycles. In view of this, H 3 PW 12 O 40 /PMMA/PA6 sandwich nanofibrous membrane is promising as a photocatalyst to remove organic pollutants from practical wastewater.
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
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Guangrong Liu,Mingxin Chen,Xin Jin,Chuangfu Song,Feifei He,Qiang Huang
In this work, 12-tungstophosphoric acid-TiO 2 composite (PTA-TiO 2 ) catalysts were fabricated by a simple method of impregnation-heat treatment. PTA-TiO 2 composites were characterized by XRD , XPS, TG/DSC, FTIR , UV−vis diffuse reflectance spectra and N 2 adsorption–desorption measurements. The results showed that the heat treatment temperature (200–500 °C) significantly affected the composition and structure of the composite. The higher calcination temperature could destroy the Keggin structure of PTA. The PTA-TiO 2 catalyzed oxidation of cyclohexene by H 2 O 2 to adipic acid demonstrated that the Keggin structure of PTA was critical to the catalytic activity of PTA-TiO 2 . Furthermore, under the photo-thermal catalytic condition, the reaction system showed higher cyclohexene conversion and adipic acid yield. A synergistic effect between the photo- and thermal approach was noticed in the PTA-TiO 2 catalyst prepared at 200 °C (PTA-TiO 2 (200)). Based on the experimental data, a thermocatalysis-dominated but photocatalysis-promoted mechanism was proposed to explain the improvement in catalytic efficiency. The catalyzed oxidation of cyclohexene with photo-thermal synergy enables utilization of sunlight and offers a novel perspective for the manufacture of adipic acid.
研究领域:
催化
·
化学工程
·
光化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Kexin Li,Yun Zhong,Shenglian Luo,Wenying Deng
In this article, a series of powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites were successfully fabricated for the first time by simple strategies. The as-prepared powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites showed the unique photocatalytic characteristic of ultra-fast degradation of organic pollutants in water under visible-light. For the best powder H 3 PW 12 O 40 /Ag 3 PO 4 , 4-fluorophenol (4-FP) and methyl orange (MO) in water can be completely degraded and rhodamine B (RB) in water can be degraded to 78 % after 360 s of visible-light irradiation. For the best modular H 3 PW 12 O 40 /Ag 3 PO 4 , 4-FP, MO, and RB can be degraded to 84 %, 72 %, and 92 % after 30 min of visible-light irradiation. The reasons for this unique photocatalytic characteristic of as-prepared powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites were systematically studied by various modern characterization strategies. The "four-step" strategy was proposed in order to realize the practical engineering application of as-prepared powder and modular H 3 PW 12 O 40 /Ag 3 PO 4 composites in photocatalytic organic wastewater treatment technology.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2014
·
IF 6.007
Kexin Li,Liushui Yan,Zhenxing Zeng,Shenglian Luo,Xubiao Luo,Xiaoming Liu,Huiqin Guo,Yihang Guo
A series of H 3 PW 12 O 40 -doped carbon nitride nanotubes (H 3 PW 12 O 40 /C 3 N 4 NTs) are prepared using one-step hydrothermal treatment, with g-C 3 N 4 and H 3 PW 12 O 40 as precursors. The morphology, porosity, phase, chemical structure, and optical and electronic properties of H 3 PW 12 O 40 /C 3 N 4 NTs are characterized. Subsequently, the photocatalytic activity of H 3 PW 12 O 40 /C 3 N 4 NTs is evaluated through the degradation of representative aqueous persistent organic pollutants methyl orange and diethyl phthalate under visible-light ( λ > 420 nm) irradiation. The photocatalytic activity of H 3 PW 12 O 40 /C 3 N 4 NTs is significantly enhanced compared with g-C 3 N 4 as a result of its unique tubular nanostructure, enhanced quantum efficiency, and high light utilization efficiency. Finally, the reusability of H 3 PW 12 O 40 /C 3 N 4 NTs is evaluated under four consecutive photocatalytic runs.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2012
·
IF 0
Zi Li Liu,Cui Xia Xu,Qian Wen Dai,Chao Xiang,Jian Jie Zhang
Supported H3PW12O40 (HPW) and supported Cesium-Substituted dodecatungsto-phosphate are eco-friendly solid acid catalysts. A series of different loading H3PW12O40/SiO2 and HPW/diatomite were prepared by a typical incipient wetness impregnation of methanol, meanwhile SiO2 and diatomite supported Cs-salt catalysts were prepared via two-step impregnating method. The catalysts were investigated by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results indicate that the Keggin structure of HPW is intact in the SiO2-supported HPW and SiO2-supported CsHPW. HPW and CsHPW are highly dispersed in the SiO2 at the low loading, while the loading is more than 40% the catalyst grains increase and gather on the surface of the carrier. What's more, diatomite is not a suitable support. HPW and CsHPW have better distribution in the SiO2 than in the diatomite. The activity of catalyst was tested in probe experiment of the alkylation of thiopene (TH) with 1-hexene.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
HYDROMETALLURGY
·
2019
·
IF 3.465
Yongli Li,Zhongwei Zhao
For more than a hundred years, extraction with ethyl ether has been the most used method for synthetizing H 3 PW 12 O 40 . However, the use of ethyl ether as the extraction agent faced many problems, such as strict regulation by public safety and environment authorities, poor operating environment, significant dissolution loss, low yields (approximately 80%), and difficulty in realizing continuous production. To overcome these problems, a new extraction method has been proposed in this paper, which uses 2-octanol as the extraction agent and water as the stripping agent. Under optimal conditions (30% 2-octanol in kerosene, O:A = 1:1, 180 g/L H 2 SO 4 , 20 g/L H 3 PO 4 , 45 °C, and a contact time of 2 min), 90.2% of H 3 PW 12 O 40 contained in the solution was extracted in a single stage; the loaded H 3 PW 12 O 40 could then be stripped completely via 3-stage continuous countercurrent stripping by maintaining O:A = 5:1, 65 °C, and t = 5 min. Finally, the obtained strip liquor, containing more than 550 g/L H 3 PW 12 O 40 , was evaporated to obtain crystals, resulting in an increased recovery rate of 10%.
研究领域:
化学工程
·
材料科学
✓ 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）