World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
53
Citations
8581
World Ranking
4319
National Ranking
67

Kaiqin Xu publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Kaiqin Xu sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 193 publications — 62nd percentile

62% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Kaiqin Xu D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Kaiqin Xu sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 53 D-Index — 57th percentile

57% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Kaiqin Xu is affiliated with the National Institute for Environmental Studies in Japan. Their research spans multiple areas within Engineering and Materials Science, with a particular focus on Electrical and Electronic Engineering and Materials Chemistry.

The scientist's main fields of study include:

  • Engineering
  • Materials Science

Within these fields, their research engages deeply with several subfields such as:

  • Electrical and Electronic Engineering
  • Materials Chemistry
  • Electronic, Optical and Magnetic Materials
  • Biomedical Engineering
  • Mechanical Engineering

Kaiqin Xu's work centers on specific topics like:

  • Supercapacitor Materials and Fabrication
  • Advancements in Battery Materials
  • Perovskite Materials and Applications
  • MXene and MAX Phase Materials
  • Advanced Memory and Neural Computing
  • Advanced Battery Materials and Technologies
  • Advanced battery technologies research

Their recent papers highlight the focus and scope of their contributions. Notable publications include:

  • Unraveling the Charge Storage Mechanism of Ti3C2Tx MXene Electrode in Acidic Electrolyte, 2020, ACS Energy Letters
  • Fire-safe, mechanically strong and tough thermoplastic Polyurethane/MXene nanocomposites with exceptional smoke suppression, 2022, Materials Today Physics
  • MXenes as High-Rate Electrodes for Energy Storage, 2020, Trends in Chemistry
  • Metallic Sandwiched-Aerogel Hybrids Enabling Flexible and Stretchable Intelligent Sensor, 2020, Nano Letters
  • Intrinsic Interfacial Dynamic Engineering of Zincophilic Microbrushes via Regulating Zn Deposition for Highly Reversible Aqueous Zinc Ion Battery, 2022, Advanced Materials

The scientist frequently publishes in the following venues:

  • ACS Applied Materials & Interfaces
  • SSRN Electronic Journal
  • Journal of Materials Chemistry A
  • The Cambridge Structural Database
  • ACS Energy Letters

Collaboration is an element of their research and they have frequent coauthors such as:

  • Jixin Zhu
  • Xiaorong Shi
  • Yingdong Xia
  • Hui Shao
  • Zifeng Lin

Best Publications

  • Long-term variations in dissolved silicate, nitrogen, and phosphorus flux from the Yangtze River into the East China Sea and impacts on estuarine ecosystem

    Maotian Li;Kaiqin Xu;Masataka Watanabe;Zhongyuan Chen

  • A pH- and temperature-phased two-stage process for hydrogen and methane production from food waste

    Chun Feng Chu;Yu You Li;Kai Qin Xu;Kai Qin Xu;Yoshitaka Ebie

  • Unraveling the catalyzing behaviors of different iron species (Fe2+ vs. Fe0) in activating persulfate-based oxidation process with implications to waste activated sludge dewaterability.

    Guangyin Zhen;Xueqin Lu;Lianghu Su;Takuro Kobayashi

  • Continuous H2 and CH4 production from high-solid food waste in the two-stage thermophilic fermentation process with the recirculation of digester sludge.

    Dong Yeol Lee;Yoshitaka Ebie;Kai Qin Xu;Yu You Li

  • Nitrogen removal and N2O emission in a full-scale domestic wastewater treatment plant with intermittent aeration

    Yuzuru Kimochi;Yuhei Inamori;Motoyuki Mizuochi;Kai-Qin Xu

  • A critical review on issues and overcoming strategies for the enhancement of dark fermentative hydrogen production in continuous systems

    Periyasamy Sivagurunathan;Gopalakrishnan Kumar;Péter Bakonyi;Sang Hyoun Kim

  • Fermentative hydrogen production using lignocellulose biomass: An overview of pre-treatment methods, inhibitor effects and detoxification experiences

    Periyasamy Sivagurunathan;Gopalakrishnan Kumar;Ackmez Mudhoo;Eldon R. Rene

  • Anaerobic co-digestion on improving methane production from mixed microalgae (Scenedesmus sp., Chlorella sp.) and food waste: Kinetic modeling and synergistic impact evaluation

    Guangyin Zhen;Xueqin Lu;Takuro Kobayashi;Gopalakrishnan Kumar

  • Microbial electrolysis cell platform for simultaneous waste biorefinery and clean electrofuels generation: Current situation, challenges and future perspectives

    Guangyin Zhen;Guangyin Zhen;Xueqin Lu;Gopalakrishnan Kumar;Péter Bakonyi

  • Mesophilic anaerobic co-digestion of waste activated sludge and Egeria densa: Performance assessment and kinetic analysis

    Guangyin Zhen;Guangyin Zhen;Xueqin Lu;Takuro Kobayashi;Yu You Li

  • Analysis of water demand and water pollutant discharge using a regional input–output table: An application to the City of Chongqing, upstream of the Three Gorges Dam in China

    Tomohiro Okadera;Masataka Watanabe;Kaiqin Xu;Kaiqin Xu

  • Investigating CH4 and N2O emissions from eco-engineering wastewater treatment processes using constructed wetland microcosms

    R. Inamori;P. Gui;P. Dass;M. Matsumura

  • Flood disaster monitoring and evaluation in China

    Jiqun Zhang;Chenghu Zhou;Kaiqin Xu;Masataka Watanabe

  • Understanding methane bioelectrosynthesis from carbon dioxide in a two-chamber microbial electrolysis cells (MECs) containing a carbon biocathode

    Guangyin Zhen;Takuro Kobayashi;Xueqin Lu;Kaiqin Xu

  • Promoted electromethanosynthesis in a two-chamber microbial electrolysis cells (MECs) containing a hybrid biocathode covered with graphite felt (GF)

    Guangyin Zhen;Xueqin Lu;Takuro Kobayashi;Gopalakrishnan Kumar

  • Anaerobic membrane bioreactor towards biowaste biorefinery and chemical energy harvest: Recent progress, membrane fouling and future perspectives

    Guangyin Zhen;Guangyin Zhen;Yang Pan;Xueqin Lu;Yu You Li

  • A successful start-up of an anaerobic membrane bioreactor (AnMBR) coupled mainstream partial nitritation-anammox (PN/A) system: A pilot-scale study on in-situ NOB elimination, AnAOB growth kinetics, and mainstream treatment performance.

    Jiang Wu;Jiang Wu;Zhe Kong;Zibin Luo;Yu Qin

  • Enhancement of biofuel production via microbial augmentation: The case of dark fermentative hydrogen

    Gopalakrishnan Kumar;Gopalakrishnan Kumar;Péter Bakonyi;Takuro Kobayashi;Kai Qin Xu

  • Comparison of single-stage and temperature-phased two-stage anaerobic digestion of oily food waste

    Li Jie Wu;Takuro Kobayashi;Yu You Li;Kai Qin Xu;Kai Qin Xu

  • Electro-conversion of carbon dioxide (CO2) to low-carbon methane by bioelectromethanogenesis process in microbial electrolysis cells: The current status and future perspective

    Zhongyi Zhang;Ying Song;Shaojuan Zheng;Guangyin Zhen

  • The Climatic Signature of Incised River Meanders

    Colin P. Stark;Jonathan R. Barbour;Yuichi S. Hayakawa;Tsuyoshi Hattanji

  • Hydrogen and methane potential based on the nature of food waste materials in a two-stage thermophilic fermentation process

    Chun Feng Chu;Kai Qin Xu;Kai Qin Xu;Yu You Li;Yuhei Inamori

Frequent Co-Authors

Gopalakrishnan Kumar
Gopalakrishnan Kumar Yonsei University
Guangyin Zhen
Guangyin Zhen East China Normal University
Yu-You Li
Yu-You Li Tohoku University
Sang-Hyoun Kim
Sang-Hyoun Kim Yonsei University
Zhongyuan Chen
Zhongyuan Chen East China Normal University
Zhanghua Wang
Zhanghua Wang East China Normal University
Yonghui Yang
Yonghui Yang Chinese Academy of Sciences
Soon Woong Chang
Soon Woong Chang Kyonggi University
Dinh Duc Nguyen
Dinh Duc Nguyen Kyonggi University
Zucong Cai
Zucong Cai Nanjing Normal University

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