JOURNAL OF NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 6
·1-9
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IF 2.127
Wu Xiang-Feng,Li Hui,Su Jun-Zhang,Zhang Jia-Rui,Feng Yan-Mei,Pan Jun-Cheng,Zhang Ying,Sun Li-Song,Zhang Wei-Guang,Sun Guo-Wen
The In 2.77 S 4 microspheres had been firstly fabricated by using polyethylene glycol (PEG) as the morphological modifier and then used to hybridize with In(OH) 3 nanocubes by a simply depositional method. The structure, optical properties, morphology, chemical compositions, and charge carrier behaviors of the as-prepared In 2.77 S 4 /In(OH) 3 composites were characterized, respectively. The methyl orange, tetracycline, rhodamine B, and Cr(VI) dilute solution were selected to evaluate their photocatalytic activities. Experimental results showed that In(OH) 3 nanocubes could improve the photocatalytic activity and recyclability of the In 2.77 S 4 microspheres under the visible light irradiation. With the usage of In(OH) 3 increased, the photocatalytic efficiency of the hybrids was firstly increased and then decreased. When the mass ratios of In 2.77 S 4 to In(OH) 3 were 6:2, it reached the maximum of 100% in 15 min for methyl orange, obviously higher than 67.4% of In 2.77 S 4 and 1.1% of In(OH) 3 . Meanwhile, it could also oxidize 85.6% of tetracycline in 20 min, 97.8% of rhodamine B in 7.5 min, and reduce 92.9% of Cr(VI) in 30 min under the visible light irradiation. Moreover, it could still degrade 91.7% of methyl orange solution after 3 cycles, which was much higher than 40.7% of In 2.77 S 4 microspheres. In addition, the possible mechanism of enhancing photocatalytic properties was proposed.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2017
·Vol. 123
·期 6
·1-6
·
IF 1.455
Wu Xiang-feng,Li Hui,Sun Yang,Wang Yi-jin,Zhang Chen-xu,Gong Xiao-dong,Wang Yu-duan,Liu Yu,Yang Xin-yue
In 2.77 S 4 nanosheets with the band gap energy of 1.75 eV were fast prepared via a hydrothermal process. The structure, morphology and optical properties of the as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy and UV–vis diffuse reflectance spectroscopy, respectively. Rhodamine B, methyl orange and potassium dichromate solution were used to evaluate the degradation efficiency of the as-prepared samples under the visible light, respectively. Experimental results showed that the molar ratio of thioacetamide to indium nitrate hydrate significantly influenced the structure and properties of the as-prepared products. With increasing the molar ratio, the degradation efficiency of rhodamine B solution was firstly increased and then decreased. When the molar ratio was 4:1, the degradation efficiency of the as-prepared sample reached to 96% in 3 min and 100% in 9 min. Moreover, this semiconductor could degrade 88% of methyl orange solution in 30 min and 87% of potassium dichromate solution in 60 min, respectively.
研究领域:
材料科学
·
纳米技术
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环境科学
·
光化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 22
·1-15
·
IF 2.8
Zhang Xue-Feng,Fu Yun-Xuan,Wang Jun-Chuan,Li Xiao-bing,Zhao Zhao-Ye,Wu Xiang-Feng,Wang Hui,Ci Li-jie
The In 2.77 S 4 /In-MOFs Z-scheme heterojunction composite photocatalysts were successfully synthesized via an insitu hydrothermal growth method. The chemical structure, morphology, optical properties, and photogenerated carriers transfer behavior of the as-prepared In 2.77 S 4 /In-MOFs composites were characterized in details. The In 2.77 S 4 /In-MOFs (10 wt%) composite showed the optimal photocatalytic degradation efficiency of 95.9% in 90 min for the tetracycline (TC) model pollutant, which was significantly higher than that of pure In 2.77 S 4 (75.1%) and In-MOFs (9.7%). The X-ray photoelectron spectrometer (XPS), photoelectrochemical, and electron paramagnetic resonance (EPR) technique were carried out to illuminate the photocatalytic degradation mechanism of In 2.77 S 4 /In-MOFs (10 wt%) for TC, which showed that the Z-scheme heterojunction structure of In 2.77 S 4 /In-MOFs (10 wt%) could reinforced the light harvesting capacity and promote the photogenerated carrier migration under visible light irradiation. Furthermore, the photogenerated holes play a major role during the photocatalytic degradation reaction. Finally, this work maybe offers an effective method for the designing In 2.77 S 4 -based Z-scheme heterojunctions to facilitate the charge carrier transfer in heterogeneous catalysts.
研究领域:
材料科学
·
环境科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 4
·1-12
·
IF 2.8
Kang Ye-Wei,Fu Yun-Xuan,Liu Shu-Nan,Zhang Xue-Feng,Wang Hui,Yan-Li,Ma Xiao-Ye,Liu Lei,Wu Xiang-Feng
In 2.77 S 4 nanosheets were first synthesized and then used to construct the In 2.77 S 4 /COFs composite photocatalyst by an in situ hydrothermal growth method. The structure, optical properties, morphology, chemical composition and photo-generated carriers behavior of the as-synthesized In 2.77 S 4 /COFs composites were discussed, respectively. The tetracycline dilute solution was selected to evaluate its photocatalytic activity. Experimental results show that COFs can improve the photocatalytic activity and recyclability of In 2.77 S 4 under visible light irradiation. With the increase in COFs dosage, the photocatalytic efficiency of the as-synthesized composite samples is first increased and then decreased. When the amount of COFs is 10 wt%, the as-synthesized In 2.77 S 4 /COFs composite photocatalyst shows the maximum photocatalytic degradation efficiency of 93.8% in 90 min, which is higher than that of 75.1% of In 2.77 S 4 and 0.1% of COFs, respectively. Furthermore, the separation and migration efficiency of the photo-generated electron–hole pairs of the as-synthesized composite are improved in comparison of the pure samples and the transient photocurrent intensity of In 2.77 S 4 /COFs composite is about 2.5 times than that of pure In 2.77 S 4 and 10 times than that of pure COFs. In addition, holes play a major role during the photocatalytic degradation process.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Wenxu Zhang,Wei Li,Huixing Yang,Linlin Hou,Yongzhuo Yu,Yangyang Jiang,Chaoyu Lv,Yuxin Huang
We propose a potential solution to the problem of severe recombination of photogenerated electron-hole pairs in composite catalysts. The g-C 3 N 5 has better electronic properties and photocatalytic efficiency than g-C 3 N 4 , and In 2.77 S 4 is a typically sulfur-deficient sulfide with stable structure and strong visible light absorption. However, the In 2.77 S 4 /g-C 3 N 5 composite catalyst has severe recombination of photogenerated electron-hole pairs, which limits its performance. To solve this problem, we introduced NCDs (nitrogen-doped carbon dots) into g-C 3 N 5 to prepare hybrid material, which subsequently combined with In 2.77 S 4 . The high-efficiency S-scheme In 2.77 S 4 /NCDs-(g-C 3 N 5 ) heterojunction was prepared by electrostatic self-assembly to prevent the thermal decomposition of g-C 3 N 5 . Photocatalytic experiments show that In 2.77 S 4 /NCDs-(g-C 3 N 5 ) composite has excellent photodegradation efficiency of rhodamine B (94.23 %), high photocatalytic H 2 production (7134 μmol·g −1 h −1 ), and good reusability in the visible light. The H 2 evolution rate of In 2.77 S 4 /NCDs-(g-C 3 N 5 ) composite is about 30.10, 3.89 and 3.08 folds than In 2.77 S 4 , g-C 3 N 5 and In 2.77 S 4 /g-C 3 N 5 , respectively. The photoluminescence spectroscopy (PL) and the time-resolved fluorescence decay (TRF) indicated a substantial reduction in photogenerated carrier recombination of In 2.77 S 4 /NCDs-(g-C 3 N 5 ) compared to In 2.77 S 4 /g-C 3 N 5 . Taking advantage of the high conductivity of NCDs , the electron-highways were constructed in heterojunctions, which accelerates the interfacial depletion of useless electron-hole pairs and reserved more strong redox carriers. In addition, we inferred a possible energy band structure for In 2.77 S 4 /NCDs-(g-C 3 N 5 ) heterojunction based on the energy band bending theory. This work provides an expandable idea for improving the utilization efficiency of photogenerated carriers by constructing electron-highways in heterojunctions.
研究领域:
材料科学
·
环境科学
·
化学
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产品关联
DOI
高影响因子
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