JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
·
2016
·
IF 1.613
Jiade Wang,Binxun Hong,Xinyang Tong,Shufeng Qiu
The process of recovering waste sulfuric acids using H2O2 catalytic oxidation is studied in this paper. Activated carbon was used as catalyst. Main operating parameters, such as temperature, feed rate of H2O2, and catalyst dosage, have effects on the removal of impurities from waste sulfuric acids. The reaction kinetics of H2O2 catalytic oxidation on impurities are discussed. At a temperature of 90°C, H2O2 feeding rate of 50 g (kg waste acid)−1 per hour, and catalyst dosage of 0.2 wt% (waste acid weight), the removal efficiencies of COD and chrominance were both more than 99%, the recovery ratio of sulfuric acid was more than 95%, and the utilization ratio of H2O2 was 88.57%.Implications: Waste sulfuric acid is a big environmental problem in China. The amount of waste sulfuric acid is huge every year. Many small and medium-sized businesses produced lots of waste acids, but they don’t have an appropriate method to treat and recover them. H2O2 catalytic oxidation has been used to treat and recover waste sulfuric acid and activated carbon is the catalyst here. Main parameters, such as temperature, feed rate of H2O2, and catalyst dosage, have been investigated. The reaction kinetics are discussed. This method can be economical and feasible for most small and medium-sized businesses.
研究领域:
环境科学
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化学工程
·
废物处理
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Entong Ye,Fangmei Lin,Chengbin Fu,Xin Zhou,Qian Lin,Hongyan Pan,Zheng Chen
A great deal of research has been carried out on the design of Pd-based catalysts in the direct synthesis of H2O2, mainly for the purpose of improving the H2O2 selectivity by weakening the activation energy on the Pd active site and thus inhibiting the dissociation of the O–O bonds in O2*, OOH*, and HOOH*. However, this often results in insufficient activation energy for the reaction between H2 and O2 on Pd, leading to difficulties in improving both the selectivity and productivity of H2O2 simultaneously. Based on this, this study reports an efficient catalyst composed of amine-functionalized SBA-15-supported Pd. The strong metal–support interaction not only makes the PdNPs highly dispersed with more Pd active sites but also improves the stability of the catalyst. The amine group modification increases the proportion of Pd0, further enhancing Pd activity and promoting the adsorption and conversion of H2 and O2 on Pd, thereby significantly increasing H2O2 productivity. Additionally, the density-functional theory simulation results showed that due to the hydrogen-bonding force between the amine group and H2O2, this particular anchoring effect would make the hydrogenation and decomposition of H2O2 effectively suppressed. Ultimately, both the selectivity and productivity of H2O2 are improved simultaneously.
研究领域:
催化化学
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材料科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Han Liu,Jun Zhang,Quanlong Xu,Hong Tao,Tingmin Di,Quanrong Deng,Shenggao Wang
Artificial photosynthesis offers a viable strategy for sustainable and environmentally friendly H2O2 production. However, conventional inorganic semiconductor photocatalysts often face limitations such as restricted light absorption, inadequate redox ability, small specific surface area and poor stability, which greatly restrict their practical applications. Herein, an innovative inorganic/organic S-scheme heterojunction is fabricated by an electrostatic self-assembling method. The optimized BT-12 composite demonstrates a significantly enhanced photocatalytic H2O2 production rate of 723 μmol L−1, surpassing the rates achieved by pure Bi2WO6 and TpPa-Cl-COF by factors of 10 and 2.9, respectively. This improvement can be attributed to the synergistic effects of enhanced light absorption, increased specific surface area, and effective separation of charge carriers and redox active sites, as well as the strong redox ability induced by the S-scheme heterojunction. Density functional theory (DFT) calculations along with X-ray photoelectron spectroscopy (XPS) measurements and electron paramagnetic resonance (EPR) characterization confirm the step-by-step charge transfer pathway. The active species trapping experiments validate that H2O2 is predominantly produced by a two-step one-electron process. This work highlights an innovative and promising strategy for constructing a highly efficient photocatalytic system based on inorganic/organic heterojunctions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Xiubo Tian,Ying Chen,Yong Chen,Dong Chen,Quan Wang,Xiaohong Li
The removal of gaseous hydrogen sulfide using FeOCl/H2O2 was studied. The effects of the FeOCl dosage, the H2O2 concentration, the reaction temperature, and the gas flow rate on the removal of H2S were investigated. The reaction products were analyzed, and the characterization of FeOCl was carried out by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and electron paramagnetic resonance spectroscopy. Furthermore, radical quenching experiments were carried out using butylated hydroxytoluene, isopropanol, and benzoquinone. It was found that the H2S removal rate for a H2S gas concentration of 160 ppm reached 85.6% when bubbling through 100 mL of an aqueous solution containing FeOCl (1 g/L) and H2O2 (0.33 mol/L) at 293 K with a flow rate of 135 mL/min. Although the dissolution of chlorine in FeOCl was found to result in reduced catalytic performance, the activity was restored after soaking the catalyst in concentrated hydrochloric acid (37%) and subsequent calcination. The mechanism of H2S removal was also discussed, and it was found that this process was controlled by H2S diffusion. FeOCl was found to activate H2O2 and produce radicals, such as •OH and •O2–, resulting in the formation of a water film rich in radicals on the FeOCl surface. Following the diffusion of H2S into the water film, it underwent oxidation by radicals to produce SO42–. Overall, the catalyst and the product can be effectively separated.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Chenglin Zhang,Jiangpeng Li,Su Zhan,Wenjun Jiang,Feng Zhou
The notorious issue of hazardous growth in ballast water and its potential for widespread diffusion pose significant challenges to the sustainable development of maritime transportation economies. Here, a simplified and sustainable method is presented for synthesizing metallic Bi-doped Bi 2 Sn 2 O 7 , assisted by H 2 O 2 to construct a Fenton-like system for the photocatalytic inactivation of marine bacteria. The introduction of metallic Bi is beneficial to the overall sterilization improvement, notably, the 3BBSO (Bi/Bi 2 Sn 2 O 7 ) exhibits optimal selectivity in marine bacteria inactivation, with improved decomposition of H 2 O 2 . The combination of metallic Bi and additional H 2 O 2 contributes to the separation of photo-generated charges and the production of •OH radicals, thereby enhancing sterilization efficiency in natural seawater. Furthermore, characterization results demonstrate that the metallic Bi act as a pivotal active sites for the enrichment of free electrons and adsorption centers for •OH, increasing the light absorption range and promoting photocatalytic bacterial inactivation. DFT simulations suggest that metallic Bi provides an optimal position for H 2 O 2 abundance, utilizing aggregated electrons to generate more •OH radicals. This sustainable framework offers valuable insights into the treatment of ballast water by deactivating the concentration of marine microorganisms.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 2
·157
·
IF 4
Shun Li,Xinbo Liu,Xinyue Zhang,Yong Liu
Piezocatalysis is a promising technology for converting mechanical energy to chemical energy. Two-dimensional (2D) piezoelectric materials, with their large surface area, high charge mobility, and good flexibility, are among the most promising candidates in piezocatalysis. In this work, for the first time, we report Bi2O2Se nanosheets (NSs) with an average thickness of ~8 nm and a lateral size of ~160 nm for efficient piezocatalytic H2O2production from water and oxygen under mechanical force induced by ultrasonication. The Bi2O2Se NSs achieved a high H2O2production rate of 1033.8 μmol/g/h using ethanol as the sacrificial agent, significantly surpassing that of its bulk-sheet counterpart. Our results provide a novel potential 2D piezocatalytic material and offer valuable guidance for the design and development of high-efficiency H2O2production driven by mechanical energy from water.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2017
·Vol. 96
·期 1
·27-32
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IF 1.356
Haiqian Zhao,Xingcun Gao,Chenghao Liu,Zhonghua Wang,Hanbing Qi
Basic rules of NO oxidation by a Fe 2+ /H 2 O 2 /AA directional decomposition system were researched based on the technical background of flue gas NO x removal. Effects of gas-liquid interfacial area, main gas, and solution parameters on NO oxidation efficiency ( η ) were analyzed. The results showed that adequate contact area was the precondition for high η by a Fe 2+ /H 2 O 2 /AA system. η decreased with the increase in NO concentration, which illustrated that this method would be efficient in oxidizing NO at a low concentration. η tended to decrease linearly with the growth in gas flow, however, the NO oxidation rate ( v ) rose with the increase in NO concentration and gas flow. η increased with the initial concentrations of H 2 O 2 and Fe 2+ , but the amplitude decreased. Controlling the initial concentrations of H 2 O 2 and Fe 2+ to achieve reasonable synergies between generation rate and consumption rate of ·OH could weaken the invalid consumption of reactants. η increased with the increase in temperature in the range 30–60 °C, but it nearly did not change with temperature after 60 °C. This oxidation technology and the traditional wet flue gas desulphurization technology exhibited temperature synergy. Under typical pH of wet desulphurization, η and H 2 O 2 consumption rate did not change obviously.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2025
·Vol. 19
·期 7
·1-16
·
IF 6.4
Yin Wenxuan,Sun Wenjun,Yuan Yongqin,Zhang Daoyi,Zhang Yuanna,Zheng Fengyi
UV/H 2 O 2 is commonly used to remove organic micropollutants and frequently paired with activated carbon for further removal of pollutants, addressing issues such as H 2 O 2 residuals, uncontrollable by-products, and energy consumption reduction. Here, we report the changes in the removal characteristics of organic contaminants during the operation of a pilot system based on UV/H 2 O 2 coupled granular activated carbon (GAC) after in situ biofilm formation to generate biologically activated carbon (BAC). We completed the screening of unknown organic matter and molecular-level chemical transformation of 100–1600 Da dissolved organic matter (DOM) using Fourier transform high-resolution mass spectrometry (FT-ICR MS). The FT-ICR MS results indicated that BAC differs from GAC in terms of DOM removal behavior and mechanisms. GAC primarily produces free radicals through synergistic residual H 2 O 2 to further oxidize and remove organics. Low molecular weight (LMW) organics undergo general molecular chemical changes but have modest removal effects. BAC considerably lowered the chemical variety of DOM and eliminated LMW organics through biodegradation and activated carbon adsorption. According to the study findings, UV/H 2 O 2 -BAC can more effectively compensate for the drawbacks of individual technologies than UV/H 2 O 2 -GAC, with superior removal efficiency of organic pollutants, no residual H 2 O 2 , controllable effluent products, and robust performance in real environmental matrices.
研究领域:
环境科学
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水处理工程
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DOI
高影响因子
ANALYST
·
2012
·Vol. 137
·期 19
·4428-4434
·
IF 4.23
Cen Xiong,Zhiyou Xiao,Manjun Zhang,Liansheng Ling
A sensor for H2O2 and H2O2-related reactant was constructed with oligonucleotides and Ru(bipy)2dppx2+ (bipy = 2,2′-bipyridine, dppx = 7,8-dimethyl-dipyridophenazine), which was performed by converting the H2O2-induced DNA cleavage into the change of luminescence. The ‘DNA light switch’ Ru(bipy)2dppx2+ could emit strong luminescence in the presence of dsDNA. DNA cleavage occurred upon addition of H2O2 due to the Fenton reaction, which resulted in the decrease of the luminescence of Ru(bipy)2dppx2+. Therefore, the luminescence intensity depended on the concentration of H2O2 and H2O2-related reactants, and the detection limits for H2O2, uric acid and cholesterol were 0.20 μM, 0.46 μM and 1.25 μM, respectively. The recovery varied between 94.0% and 105.0% when the assay was applied to the determination of uric acid and cholesterol in biological samples, which demonstrated the good practicability of the assay.
研究领域:
分析化学
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生物化学
·
传感器
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xinyu Liu,Xiaoli Dong,Yu Wang,Jiaxin Gao,Nan Zheng,Xinxin Zhang
The photocatalytic production of H 2 O 2 using the abundant water and air on earth is promising. Herein, the flower-like polyimide/ZnIn 2 S 4 heterostructures were prepared by a simple two-step solvothermal method, where the tight interface formed between polyimide (PI) and ZnIn 2 S 4 microspheres facilitated the separation and migration of photo-generated charges. Under air condition, the photocatalytic H 2 O 2 production rate without any sacrificial agent is as high as 411.07 μmol g −1 h −1 , which is 15.4 and 3.2 times higher than that of the pristine PI and ZnIn 2 S 4 microspheres, respectively. Meanwhile, the PI/ZnIn 2 S 4 -2 has excellent reusability, and the H 2 O 2 production of PI/ZnIn 2 S 4 -2 maintained 80% of its original value after five cycles. Moreover, the as-prepared samples underwent comprehensive characterization using various techniques, and the photocatalytic mechanism was also studied in detail. Active species capture experiments showed that e − and ·O 2 − played the primary role in this reaction system. This work provides a novel idea for photocatalytic H 2 O 2 production in pure water and air.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Hai-Tao Ren,Chao-Chen Cai,Peng-Yue Zhu,Cong Wang,Song-Hai Wu,Yong Liu,Xu Han
Photocatalytic technology is a popular research area for converting solar energy into environmentally friendly chemicals and is considered the greenest approach for producing H2O2. However, the corresponding reactive oxygen species (ROS) and pathway involved in the photocatalytic generation of H2O2 by the Bi2.15WO6-glucose system are still not clear. Quenching experiments have established that neither •OH nor h+ contribute to the formation of H2O2, and show that the formed surface superoxo (≡Bi–OO•) and peroxo (≡Bi–OOH) species are the predominant ROS in H2O2 generation. In addition, various characterizations indicate the enhanced electron-transfer on the surface of Bi2.15WO6 with increasing contents of glucose via the ligand-to-metal charge transfer pathway, confirming H-transfer from glucose to ≡Bi–OO• or ≡Bi–OOH. The increased production of H2O2 with decreasing bond dissociation energy (BDEO–H) values of various phenolic compounds again supports the H-transfer mechanism from phenolic compounds to ≡Bi–OO• and then to ≡Bi–OOH. DFT calculations further reveal that on the Bi2.15WO6 surface, oxygen is sequentially reduced to ≡Bi–OO• and ≡Bi–OOH, while H-transfer from H2O or glucose to ≡Bi–OO• and ≡Bi–OOH, resulting in the production of H2O2. The lower energy barrier of H-transfer from adsorbed glucose (0.636 eV) than that from H2O (1.157 eV) indicates that H-transfer is more favorable from adsorbed glucose. This work gives new insight into the photocatalytic generation of H2O2 by Bi2.15WO6 in the presence of glucose/phenolic compounds via the H-abstraction pathway.
研究领域:
材料科学
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环境科学
·
催化化学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Mingming Du,Anxian Peng,Hongyue Liu,Huimei Chen,Qiyun Li,Zheng Fang,Ganning Zeng,Rongjun Yan
The well-designed internal electric field (IEF) with band bending effects will effectively accelerate the separation and transfer of photogenerated charges to foster a photocatalytic performance. Hence, in this work, the IEF-induced BiOCl/TiO2 p-n heterojunctions are prepared through the hydrothermal method for photocatalytic H2O2 production. The BiOCl/2TiO2 composite performed a superior H2O2 yield of 4.75 mM h–1, which is 4 times higher than that of pristine BiOCl. The p-n heterojunction mechanism was investigated via XPS and photoelectrochemical property tests, in which BiOCl/2TiO2 showed the highest photogenerated charge separation efficiency for boosting photocatalytic activity. This work provided an effective strategy for the design of p-n heterojunction photocatalysts to enhance photocatalytic performance.
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
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