JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2021
·Vol. 97
·期 5
·1267-1274
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IF 3.174
Ganning Zeng,Chunxian Hong,Yuan Ma,Mingming Du,Yan Zhang,Hongwei Luo,Bing Chen,Xiangliang Pan
BACKGROUND During the past two decades, aquatic polycyclic aromatic hydrocarbon (PAH) contamination has gained more and more attention, because of carcinogenicity or mutagenicity, toxicity, persistence and bioaccumulation, and a huge threat posed to entire ecosystems. RESULTS Sargassum horneri ( SH )-based carbon was pretreated with ethanol and formaldehyde, and obtained after pre-carbonization using H 2 SO 4 . The SH carbon powder was used to immobilize nano-TiO 2 in aquatic environment by a facile sol–gel method. The resulting C/TiO 2 catalyst was applied to photocatalytic aquatic naphthalene degradation under sunlight and showed the best naphthalene degradation performance of 83.77% under simulated sunlight, which could be attributed to the shape and structure contribution originating from SH . C/TiO 2 served as both adsorbent and catalyst in the degradation process of naphthalene, and the photodegradation process conformed to a double-exponential kinetic model, indicating that there are physical and chemical processes involved in the degradation. The mechanism for enhanced photocatalytic activity was verified as a synergistic mechanism resulting from SH -based carbon and TiO 2 , and showed industrial potential for removal aquatic PAH pollutants. CONCLUSIONS This study verifies that the synergistic effect resulting from SH -based carbon and TiO 2 enhanced the photocatalytic performance. © 2021 Society of Chemical Industry (SCI).
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Xiaoxin Lv,Zixiao Deng,Menglian Wang,Jiujun Deng
Transition-metal carbides, carbonitrides , and nitrides (MXene) as an emerging two-dimensional semiconductor has open an ideal pathway for fabricating various TiO 2 -based functional materials . In this work, we demonstrate a simple and one-step heat treatment for the fabrication of Ti 3 C 2 MXene-derived carbon-doped TiO 2 /Fe 2 O 3 composite for superior lithium-ion batteries (LIBs). As an anode, the as-fabricated composite delivers an excellent lithium-ion storage of 538 mA h/g at a current density of 0.1 A/g and superior rate performance of 152.6 mA h/g at a higher current density of 5 A/g, which is 6 times higher than that of C-doped TiO 2 electrode. In addition, a remarkable cyclic stability with 88.46 % capacity retention is also obtained for the composite anode at a current density of 1 A/g after 1000 cycles. Based on various characterizations, the greatly enhanced electrochemical performance can be attributed to the synergistic effects of carbon doping, layered structures of TiO 2 , and the anchoring of Fe 2 O 3 nanoparticles , which effectively promote the charge transport kinetics. This study will broaden the Ti 3 C 2 MXene application in LIBs and meanwhile provide an alternative method for synthesizing more efficient anode materials .
研究领域:
材料科学
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能源存储
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纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2023
·
IF 8.7
Hanyu Liu,Zhuo Yu,Ming Xiao,Wenke Zhu,Junlong Liu,Lizhi Wang,Tao Xu,Wenlei Wang,Ting Yang
The efficient removal of arsenic from wastewater is still a challenge. In this paper, a heterojunction consisting of in-situ carbon-doped TiO 2 and nitrogen deficiency g-C 3 N 4 (C/TiO 2 @ND-C 3 N 4 ) has been constructed, which can completely oxidize As(III) (10,000 μg/L, 40 mL) to As(V) within 12 min under visible light and simultaneously adsorb total As (95.0%) with the pseudo-secondary kinetic equation , superior than in-situ carbon-doped TiO 2 (75.0%) and nitrogen deficiency g-C 3 N 4 (50.5%). The good photocatalytic oxidation and adsorption performances of C/TiO 2 @ND-C 3 N 4 on As(III) removal can be attributed to the successful synthesis of heterojunction. On one hand, the building of C–O–Ti interfacial chemical bonds enable rapid electron transfer and improve the efficiency of photocatalytic oxidation. On the other hand, the decreased As(V) adsorption energy resulted from the synthesized heterojunction boost the adsorption capability of As(V), which was completed by the generation of O–As bonds with oxygen-containing functional groups on the surface of TiO 2 and hydrogen bonds with high content pyrrole nitrogen derived from ND-C 3 N 4 , respectively. The results manifest that the preparation of bifunctional materials with both photocatalytic oxidation and adsorption properties provides a new strategy to achieve the removal of As.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2014
·
IF 3.552
Ling Jiang,Yunpeng Huang,Tianxi Liu
In this work, the effects of halloysite nanotubes (HNTs) on the visible-light photocatalytic ability of electrospun carbon doped TiO 2 /HNT (C TH) nanofibers have been explored. Structural and morphological investigations demonstrate that incorporation of HNTs into anatase C TH hybrid nanofibers was easily achieved by using sol–gel processing combined with electrospinning approach, thus HNTs could be uniformly embedded in the electrospun nanofibers. The visible-light photocatalytic efficiency of C TH hybrid on the degradation of methyl blue (MB) was greatly enhanced with the combination of moderate amount of HNTs (8%), which was 23 times higher than that of commercial anatase TiO 2 . Mechanism of the enhancing effect of HNTs has been explored by analyzing the dual-effect of adsorption and photocatalysis in various amounts of HNTs incorporated C TiO 2 nanofibers. With nanotubular structure and considerable adsorption ability, incorporated HNTs functioned as porogen agent in C TH nanofibers. This simple incorporation approach increases the specific surface areas of nanofibers, which improves the mass transport of reactant into the nanofibers and the adsorption of visible-light by scattering, meanwhile may suppress the charge recombination and enhance photoinduced charge separation, thus efficiently enhancing visible-light photocatalytic performance of the C TH hybrid nanofibers.
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chaogang Ban,Yang Wang,Jiangping Ma,Yajie Feng,Junjie Ding,Youyu Duan,Xue Liu,Bin Zhang,Jinjing Tang,Xiaoping Tao,Liyong Gan,Shuangshuang Tan,Xiaoyuan Zhou
Rational fabricating advanced photocatalysts to recycle CO 2 into solar fuel is one of the most promising approaches to simultaneously address energy shortages and global warming. TiO 2 has been widely used in photocatalytic CO 2 reduction due to its abundant reserves, non-toxicity and harmlessness etc. However, it remains significantly challenging for practical applications due to the fast electron-hole recombination. Herein, we design a direct TiO 2 based Z-Scheme heterojunction by self-assembly of C-doped TiO 2 nanoparticles on 3D hierarchical petal of flower-like β-Bi 2 O 3 (C-TiO 2 /β-Bi 2 O 3 ). In situ electron paramagnetic resonance tests, in situ X-ray photoelectron spectroscopy and theoretical calculations reveal that electrons are transferred from β-Bi 2 O 3 to C-TiO 2 due to the formation of Z-Scheme heterojunction, which greatly accelerates the separation of photogenerated carriers to promote efficient CO 2 photoreduction. Ultimately, the optimal heterojunction shows significantly enhanced photocatalytic activity for CO 2 reduction to CO (31.07 μmol g –1 h −1 ) compared to the pure TiO 2 (3.28 μmol g –1 h −1 ) without using any photosensitizers and sacrificial agents. This work provides a unique insight to design direct Z-Scheme heterojunctions and delivers a promising photocatalyst for overcoming global warming and energy-supply issues.
研究领域:
材料科学
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环境科学
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化学工程
·
光催化
✓ 已验证
DOI
高影响因子
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